| // Copyright 2009 The Go Authors. All rights reserved. | |
| // Use of this source code is governed by a BSD-style | |
| // license that can be found in the LICENSE file. | |
| package fmt_test | |
| import ( | |
| "bytes" | |
| . "fmt" | |
| "internal/race" | |
| "io" | |
| "math" | |
| "reflect" | |
| "runtime" | |
| "strings" | |
| "testing" | |
| "time" | |
| "unicode" | |
| ) | |
| type ( | |
| renamedBool bool | |
| renamedInt int | |
| renamedInt8 int8 | |
| renamedInt16 int16 | |
| renamedInt32 int32 | |
| renamedInt64 int64 | |
| renamedUint uint | |
| renamedUint8 uint8 | |
| renamedUint16 uint16 | |
| renamedUint32 uint32 | |
| renamedUint64 uint64 | |
| renamedUintptr uintptr | |
| renamedString string | |
| renamedBytes []byte | |
| renamedFloat32 float32 | |
| renamedFloat64 float64 | |
| renamedComplex64 complex64 | |
| renamedComplex128 complex128 | |
| ) | |
| func TestFmtInterface(t *testing.T) { | |
| var i1 interface{} | |
| i1 = "abc" | |
| s := Sprintf("%s", i1) | |
| if s != "abc" { | |
| t.Errorf(`Sprintf("%%s", empty("abc")) = %q want %q`, s, "abc") | |
| } | |
| } | |
| var ( | |
| NaN = math.NaN() | |
| posInf = math.Inf(1) | |
| negInf = math.Inf(-1) | |
| intVar = 0 | |
| array = [5]int{1, 2, 3, 4, 5} | |
| iarray = [4]interface{}{1, "hello", 2.5, nil} | |
| slice = array[:] | |
| islice = iarray[:] | |
| ) | |
| type A struct { | |
| i int | |
| j uint | |
| s string | |
| x []int | |
| } | |
| type I int | |
| func (i I) String() string { return Sprintf("<%d>", int(i)) } | |
| type B struct { | |
| I I | |
| j int | |
| } | |
| type C struct { | |
| i int | |
| B | |
| } | |
| type F int | |
| func (f F) Format(s State, c rune) { | |
| Fprintf(s, "<%c=F(%d)>", c, int(f)) | |
| } | |
| type G int | |
| func (g G) GoString() string { | |
| return Sprintf("GoString(%d)", int(g)) | |
| } | |
| type S struct { | |
| F F // a struct field that Formats | |
| G G // a struct field that GoStrings | |
| } | |
| type SI struct { | |
| I interface{} | |
| } | |
| // P is a type with a String method with pointer receiver for testing %p. | |
| type P int | |
| var pValue P | |
| func (p *P) String() string { | |
| return "String(p)" | |
| } | |
| var barray = [5]renamedUint8{1, 2, 3, 4, 5} | |
| var bslice = barray[:] | |
| type byteStringer byte | |
| func (byteStringer) String() string { | |
| return "X" | |
| } | |
| var byteStringerSlice = []byteStringer{'h', 'e', 'l', 'l', 'o'} | |
| type byteFormatter byte | |
| func (byteFormatter) Format(f State, _ rune) { | |
| Fprint(f, "X") | |
| } | |
| var byteFormatterSlice = []byteFormatter{'h', 'e', 'l', 'l', 'o'} | |
| var fmtTests = []struct { | |
| fmt string | |
| val interface{} | |
| out string | |
| }{ | |
| {"%d", 12345, "12345"}, | |
| {"%v", 12345, "12345"}, | |
| {"%t", true, "true"}, | |
| // basic string | |
| {"%s", "abc", "abc"}, | |
| {"%q", "abc", `"abc"`}, | |
| {"%x", "abc", "616263"}, | |
| {"%x", "\xff\xf0\x0f\xff", "fff00fff"}, | |
| {"%X", "\xff\xf0\x0f\xff", "FFF00FFF"}, | |
| {"%x", "", ""}, | |
| {"% x", "", ""}, | |
| {"%#x", "", ""}, | |
| {"%# x", "", ""}, | |
| {"%x", "xyz", "78797a"}, | |
| {"%X", "xyz", "78797A"}, | |
| {"% x", "xyz", "78 79 7a"}, | |
| {"% X", "xyz", "78 79 7A"}, | |
| {"%#x", "xyz", "0x78797a"}, | |
| {"%#X", "xyz", "0X78797A"}, | |
| {"%# x", "xyz", "0x78 0x79 0x7a"}, | |
| {"%# X", "xyz", "0X78 0X79 0X7A"}, | |
| // basic bytes | |
| {"%s", []byte("abc"), "abc"}, | |
| {"%s", [3]byte{'a', 'b', 'c'}, "abc"}, | |
| {"%s", &[3]byte{'a', 'b', 'c'}, "&abc"}, | |
| {"%q", []byte("abc"), `"abc"`}, | |
| {"%x", []byte("abc"), "616263"}, | |
| {"%x", []byte("\xff\xf0\x0f\xff"), "fff00fff"}, | |
| {"%X", []byte("\xff\xf0\x0f\xff"), "FFF00FFF"}, | |
| {"%x", []byte(""), ""}, | |
| {"% x", []byte(""), ""}, | |
| {"%#x", []byte(""), ""}, | |
| {"%# x", []byte(""), ""}, | |
| {"%x", []byte("xyz"), "78797a"}, | |
| {"%X", []byte("xyz"), "78797A"}, | |
| {"% x", []byte("xyz"), "78 79 7a"}, | |
| {"% X", []byte("xyz"), "78 79 7A"}, | |
| {"%#x", []byte("xyz"), "0x78797a"}, | |
| {"%#X", []byte("xyz"), "0X78797A"}, | |
| {"%# x", []byte("xyz"), "0x78 0x79 0x7a"}, | |
| {"%# X", []byte("xyz"), "0X78 0X79 0X7A"}, | |
| // escaped strings | |
| {"%q", "", `""`}, | |
| {"%#q", "", "``"}, | |
| {"%q", "\"", `"\""`}, | |
| {"%#q", "\"", "`\"`"}, | |
| {"%q", "`", `"` + "`" + `"`}, | |
| {"%#q", "`", `"` + "`" + `"`}, | |
| {"%q", "\n", `"\n"`}, | |
| {"%#q", "\n", `"\n"`}, | |
| {"%q", `\n`, `"\\n"`}, | |
| {"%#q", `\n`, "`\\n`"}, | |
| {"%q", "abc", `"abc"`}, | |
| {"%#q", "abc", "`abc`"}, | |
| {"%q", "日本語", `"日本語"`}, | |
| {"%+q", "日本語", `"\u65e5\u672c\u8a9e"`}, | |
| {"%#q", "日本語", "`日本語`"}, | |
| {"%#+q", "日本語", "`日本語`"}, | |
| {"%q", "\a\b\f\n\r\t\v\"\\", `"\a\b\f\n\r\t\v\"\\"`}, | |
| {"%+q", "\a\b\f\n\r\t\v\"\\", `"\a\b\f\n\r\t\v\"\\"`}, | |
| {"%#q", "\a\b\f\n\r\t\v\"\\", `"\a\b\f\n\r\t\v\"\\"`}, | |
| {"%#+q", "\a\b\f\n\r\t\v\"\\", `"\a\b\f\n\r\t\v\"\\"`}, | |
| {"%q", "☺", `"☺"`}, | |
| {"% q", "☺", `"☺"`}, // The space modifier should have no effect. | |
| {"%+q", "☺", `"\u263a"`}, | |
| {"%#q", "☺", "`☺`"}, | |
| {"%#+q", "☺", "`☺`"}, | |
| {"%10q", "⌘", ` "⌘"`}, | |
| {"%+10q", "⌘", ` "\u2318"`}, | |
| {"%-10q", "⌘", `"⌘" `}, | |
| {"%+-10q", "⌘", `"\u2318" `}, | |
| {"%010q", "⌘", `0000000"⌘"`}, | |
| {"%+010q", "⌘", `00"\u2318"`}, | |
| {"%-010q", "⌘", `"⌘" `}, // 0 has no effect when - is present. | |
| {"%+-010q", "⌘", `"\u2318" `}, | |
| {"%#8q", "\n", ` "\n"`}, | |
| {"%#+8q", "\r", ` "\r"`}, | |
| {"%#-8q", "\t", "` ` "}, | |
| {"%#+-8q", "\b", `"\b" `}, | |
| {"%q", "abc\xffdef", `"abc\xffdef"`}, | |
| {"%+q", "abc\xffdef", `"abc\xffdef"`}, | |
| {"%#q", "abc\xffdef", `"abc\xffdef"`}, | |
| {"%#+q", "abc\xffdef", `"abc\xffdef"`}, | |
| // Runes that are not printable. | |
| {"%q", "\U0010ffff", `"\U0010ffff"`}, | |
| {"%+q", "\U0010ffff", `"\U0010ffff"`}, | |
| {"%#q", "\U0010ffff", "``"}, | |
| {"%#+q", "\U0010ffff", "``"}, | |
| // Runes that are not valid. | |
| {"%q", string(0x110000), `"�"`}, | |
| {"%+q", string(0x110000), `"\ufffd"`}, | |
| {"%#q", string(0x110000), "`�`"}, | |
| {"%#+q", string(0x110000), "`�`"}, | |
| // characters | |
| {"%c", uint('x'), "x"}, | |
| {"%c", 0xe4, "ä"}, | |
| {"%c", 0x672c, "本"}, | |
| {"%c", '日', "日"}, | |
| {"%.0c", '⌘', "⌘"}, // Specifying precision should have no effect. | |
| {"%3c", '⌘', " ⌘"}, | |
| {"%-3c", '⌘', "⌘ "}, | |
| // Runes that are not printable. | |
| {"%c", '\U00000e00', "\u0e00"}, | |
| {"%c", '\U0010ffff', "\U0010ffff"}, | |
| // Runes that are not valid. | |
| {"%c", -1, "�"}, | |
| {"%c", 0xDC80, "�"}, | |
| {"%c", rune(0x110000), "�"}, | |
| {"%c", int64(0xFFFFFFFFF), "�"}, | |
| {"%c", uint64(0xFFFFFFFFF), "�"}, | |
| // escaped characters | |
| {"%q", uint(0), `'\x00'`}, | |
| {"%+q", uint(0), `'\x00'`}, | |
| {"%q", '"', `'"'`}, | |
| {"%+q", '"', `'"'`}, | |
| {"%q", '\'', `'\''`}, | |
| {"%+q", '\'', `'\''`}, | |
| {"%q", '`', "'`'"}, | |
| {"%+q", '`', "'`'"}, | |
| {"%q", 'x', `'x'`}, | |
| {"%+q", 'x', `'x'`}, | |
| {"%q", 'ÿ', `'ÿ'`}, | |
| {"%+q", 'ÿ', `'\u00ff'`}, | |
| {"%q", '\n', `'\n'`}, | |
| {"%+q", '\n', `'\n'`}, | |
| {"%q", '☺', `'☺'`}, | |
| {"%+q", '☺', `'\u263a'`}, | |
| {"% q", '☺', `'☺'`}, // The space modifier should have no effect. | |
| {"%.0q", '☺', `'☺'`}, // Specifying precision should have no effect. | |
| {"%10q", '⌘', ` '⌘'`}, | |
| {"%+10q", '⌘', ` '\u2318'`}, | |
| {"%-10q", '⌘', `'⌘' `}, | |
| {"%+-10q", '⌘', `'\u2318' `}, | |
| {"%010q", '⌘', `0000000'⌘'`}, | |
| {"%+010q", '⌘', `00'\u2318'`}, | |
| {"%-010q", '⌘', `'⌘' `}, // 0 has no effect when - is present. | |
| {"%+-010q", '⌘', `'\u2318' `}, | |
| // Runes that are not printable. | |
| {"%q", '\U00000e00', `'\u0e00'`}, | |
| {"%q", '\U0010ffff', `'\U0010ffff'`}, | |
| // Runes that are not valid. | |
| {"%q", int32(-1), "%!q(int32=-1)"}, | |
| {"%q", 0xDC80, `'�'`}, | |
| {"%q", rune(0x110000), "%!q(int32=1114112)"}, | |
| {"%q", int64(0xFFFFFFFFF), "%!q(int64=68719476735)"}, | |
| {"%q", uint64(0xFFFFFFFFF), "%!q(uint64=68719476735)"}, | |
| // width | |
| {"%5s", "abc", " abc"}, | |
| {"%2s", "\u263a", " ☺"}, | |
| {"%-5s", "abc", "abc "}, | |
| {"%-8q", "abc", `"abc" `}, | |
| {"%05s", "abc", "00abc"}, | |
| {"%08q", "abc", `000"abc"`}, | |
| {"%5s", "abcdefghijklmnopqrstuvwxyz", "abcdefghijklmnopqrstuvwxyz"}, | |
| {"%.5s", "abcdefghijklmnopqrstuvwxyz", "abcde"}, | |
| {"%.0s", "日本語日本語", ""}, | |
| {"%.5s", "日本語日本語", "日本語日本"}, | |
| {"%.10s", "日本語日本語", "日本語日本語"}, | |
| {"%.5s", []byte("日本語日本語"), "日本語日本"}, | |
| {"%.5q", "abcdefghijklmnopqrstuvwxyz", `"abcde"`}, | |
| {"%.5x", "abcdefghijklmnopqrstuvwxyz", "6162636465"}, | |
| {"%.5q", []byte("abcdefghijklmnopqrstuvwxyz"), `"abcde"`}, | |
| {"%.5x", []byte("abcdefghijklmnopqrstuvwxyz"), "6162636465"}, | |
| {"%.3q", "日本語日本語", `"日本語"`}, | |
| {"%.3q", []byte("日本語日本語"), `"日本語"`}, | |
| {"%.1q", "日本語", `"日"`}, | |
| {"%.1q", []byte("日本語"), `"日"`}, | |
| {"%.1x", "日本語", "e6"}, | |
| {"%.1X", []byte("日本語"), "E6"}, | |
| {"%10.1q", "日本語日本語", ` "日"`}, | |
| {"%10v", nil, " <nil>"}, | |
| {"%-10v", nil, "<nil> "}, | |
| // integers | |
| {"%d", uint(12345), "12345"}, | |
| {"%d", int(-12345), "-12345"}, | |
| {"%d", ^uint8(0), "255"}, | |
| {"%d", ^uint16(0), "65535"}, | |
| {"%d", ^uint32(0), "4294967295"}, | |
| {"%d", ^uint64(0), "18446744073709551615"}, | |
| {"%d", int8(-1 << 7), "-128"}, | |
| {"%d", int16(-1 << 15), "-32768"}, | |
| {"%d", int32(-1 << 31), "-2147483648"}, | |
| {"%d", int64(-1 << 63), "-9223372036854775808"}, | |
| {"%.d", 0, ""}, | |
| {"%.0d", 0, ""}, | |
| {"%6.0d", 0, " "}, | |
| {"%06.0d", 0, " "}, | |
| {"% d", 12345, " 12345"}, | |
| {"%+d", 12345, "+12345"}, | |
| {"%+d", -12345, "-12345"}, | |
| {"%b", 7, "111"}, | |
| {"%b", -6, "-110"}, | |
| {"%b", ^uint32(0), "11111111111111111111111111111111"}, | |
| {"%b", ^uint64(0), "1111111111111111111111111111111111111111111111111111111111111111"}, | |
| {"%b", int64(-1 << 63), zeroFill("-1", 63, "")}, | |
| {"%o", 01234, "1234"}, | |
| {"%#o", 01234, "01234"}, | |
| {"%o", ^uint32(0), "37777777777"}, | |
| {"%o", ^uint64(0), "1777777777777777777777"}, | |
| {"%#X", 0, "0X0"}, | |
| {"%x", 0x12abcdef, "12abcdef"}, | |
| {"%X", 0x12abcdef, "12ABCDEF"}, | |
| {"%x", ^uint32(0), "ffffffff"}, | |
| {"%X", ^uint64(0), "FFFFFFFFFFFFFFFF"}, | |
| {"%.20b", 7, "00000000000000000111"}, | |
| {"%10d", 12345, " 12345"}, | |
| {"%10d", -12345, " -12345"}, | |
| {"%+10d", 12345, " +12345"}, | |
| {"%010d", 12345, "0000012345"}, | |
| {"%010d", -12345, "-000012345"}, | |
| {"%20.8d", 1234, " 00001234"}, | |
| {"%20.8d", -1234, " -00001234"}, | |
| {"%020.8d", 1234, " 00001234"}, | |
| {"%020.8d", -1234, " -00001234"}, | |
| {"%-20.8d", 1234, "00001234 "}, | |
| {"%-20.8d", -1234, "-00001234 "}, | |
| {"%-#20.8x", 0x1234abc, "0x01234abc "}, | |
| {"%-#20.8X", 0x1234abc, "0X01234ABC "}, | |
| {"%-#20.8o", 01234, "00001234 "}, | |
| // Test correct f.intbuf overflow checks. | |
| {"%068d", 1, zeroFill("", 68, "1")}, | |
| {"%068d", -1, zeroFill("-", 67, "1")}, | |
| {"%#.68x", 42, zeroFill("0x", 68, "2a")}, | |
| {"%.68d", -42, zeroFill("-", 68, "42")}, | |
| {"%+.68d", 42, zeroFill("+", 68, "42")}, | |
| {"% .68d", 42, zeroFill(" ", 68, "42")}, | |
| {"% +.68d", 42, zeroFill("+", 68, "42")}, | |
| // unicode format | |
| {"%U", 0, "U+0000"}, | |
| {"%U", -1, "U+FFFFFFFFFFFFFFFF"}, | |
| {"%U", '\n', `U+000A`}, | |
| {"%#U", '\n', `U+000A`}, | |
| {"%+U", 'x', `U+0078`}, // Plus flag should have no effect. | |
| {"%# U", 'x', `U+0078 'x'`}, // Space flag should have no effect. | |
| {"%#.2U", 'x', `U+0078 'x'`}, // Precisions below 4 should print 4 digits. | |
| {"%U", '\u263a', `U+263A`}, | |
| {"%#U", '\u263a', `U+263A '☺'`}, | |
| {"%U", '\U0001D6C2', `U+1D6C2`}, | |
| {"%#U", '\U0001D6C2', `U+1D6C2 '𝛂'`}, | |
| {"%#14.6U", '⌘', " U+002318 '⌘'"}, | |
| {"%#-14.6U", '⌘', "U+002318 '⌘' "}, | |
| {"%#014.6U", '⌘', " U+002318 '⌘'"}, | |
| {"%#-014.6U", '⌘', "U+002318 '⌘' "}, | |
| {"%.68U", uint(42), zeroFill("U+", 68, "2A")}, | |
| {"%#.68U", '日', zeroFill("U+", 68, "65E5") + " '日'"}, | |
| // floats | |
| {"%+.3e", 0.0, "+0.000e+00"}, | |
| {"%+.3e", 1.0, "+1.000e+00"}, | |
| {"%+.3f", -1.0, "-1.000"}, | |
| {"%+.3F", -1.0, "-1.000"}, | |
| {"%+.3F", float32(-1.0), "-1.000"}, | |
| {"%+07.2f", 1.0, "+001.00"}, | |
| {"%+07.2f", -1.0, "-001.00"}, | |
| {"%-07.2f", 1.0, "1.00 "}, | |
| {"%-07.2f", -1.0, "-1.00 "}, | |
| {"%+-07.2f", 1.0, "+1.00 "}, | |
| {"%+-07.2f", -1.0, "-1.00 "}, | |
| {"%-+07.2f", 1.0, "+1.00 "}, | |
| {"%-+07.2f", -1.0, "-1.00 "}, | |
| {"%+10.2f", +1.0, " +1.00"}, | |
| {"%+10.2f", -1.0, " -1.00"}, | |
| {"% .3E", -1.0, "-1.000E+00"}, | |
| {"% .3e", 1.0, " 1.000e+00"}, | |
| {"%+.3g", 0.0, "+0"}, | |
| {"%+.3g", 1.0, "+1"}, | |
| {"%+.3g", -1.0, "-1"}, | |
| {"% .3g", -1.0, "-1"}, | |
| {"% .3g", 1.0, " 1"}, | |
| {"%b", float32(1.0), "8388608p-23"}, | |
| {"%b", 1.0, "4503599627370496p-52"}, | |
| // Precision has no effect for binary float format. | |
| {"%.4b", float32(1.0), "8388608p-23"}, | |
| {"%.4b", -1.0, "-4503599627370496p-52"}, | |
| // Test correct f.intbuf boundary checks. | |
| {"%.68f", 1.0, zeroFill("1.", 68, "")}, | |
| {"%.68f", -1.0, zeroFill("-1.", 68, "")}, | |
| // float infinites and NaNs | |
| {"%f", posInf, "+Inf"}, | |
| {"%.1f", negInf, "-Inf"}, | |
| {"% f", NaN, " NaN"}, | |
| {"%20f", posInf, " +Inf"}, | |
| {"% 20F", posInf, " Inf"}, | |
| {"% 20e", negInf, " -Inf"}, | |
| {"%+20E", negInf, " -Inf"}, | |
| {"% +20g", negInf, " -Inf"}, | |
| {"%+-20G", posInf, "+Inf "}, | |
| {"%20e", NaN, " NaN"}, | |
| {"% +20E", NaN, " +NaN"}, | |
| {"% -20g", NaN, " NaN "}, | |
| {"%+-20G", NaN, "+NaN "}, | |
| // Zero padding does not apply to infinities and NaN. | |
| {"%+020e", posInf, " +Inf"}, | |
| {"%-020f", negInf, "-Inf "}, | |
| {"%-020E", NaN, "NaN "}, | |
| // complex values | |
| {"%.f", 0i, "(0+0i)"}, | |
| {"% .f", 0i, "( 0+0i)"}, | |
| {"%+.f", 0i, "(+0+0i)"}, | |
| {"% +.f", 0i, "(+0+0i)"}, | |
| {"%+.3e", 0i, "(+0.000e+00+0.000e+00i)"}, | |
| {"%+.3f", 0i, "(+0.000+0.000i)"}, | |
| {"%+.3g", 0i, "(+0+0i)"}, | |
| {"%+.3e", 1 + 2i, "(+1.000e+00+2.000e+00i)"}, | |
| {"%+.3f", 1 + 2i, "(+1.000+2.000i)"}, | |
| {"%+.3g", 1 + 2i, "(+1+2i)"}, | |
| {"%.3e", 0i, "(0.000e+00+0.000e+00i)"}, | |
| {"%.3f", 0i, "(0.000+0.000i)"}, | |
| {"%.3F", 0i, "(0.000+0.000i)"}, | |
| {"%.3F", complex64(0i), "(0.000+0.000i)"}, | |
| {"%.3g", 0i, "(0+0i)"}, | |
| {"%.3e", 1 + 2i, "(1.000e+00+2.000e+00i)"}, | |
| {"%.3f", 1 + 2i, "(1.000+2.000i)"}, | |
| {"%.3g", 1 + 2i, "(1+2i)"}, | |
| {"%.3e", -1 - 2i, "(-1.000e+00-2.000e+00i)"}, | |
| {"%.3f", -1 - 2i, "(-1.000-2.000i)"}, | |
| {"%.3g", -1 - 2i, "(-1-2i)"}, | |
| {"% .3E", -1 - 2i, "(-1.000E+00-2.000E+00i)"}, | |
| {"%+.3g", 1 + 2i, "(+1+2i)"}, | |
| {"%+.3g", complex64(1 + 2i), "(+1+2i)"}, | |
| {"%b", 1 + 2i, "(4503599627370496p-52+4503599627370496p-51i)"}, | |
| {"%b", complex64(1 + 2i), "(8388608p-23+8388608p-22i)"}, | |
| // Precision has no effect for binary complex format. | |
| {"%.4b", 1 + 2i, "(4503599627370496p-52+4503599627370496p-51i)"}, | |
| {"%.4b", complex64(1 + 2i), "(8388608p-23+8388608p-22i)"}, | |
| // complex infinites and NaNs | |
| {"%f", complex(posInf, posInf), "(+Inf+Infi)"}, | |
| {"%f", complex(negInf, negInf), "(-Inf-Infi)"}, | |
| {"%f", complex(NaN, NaN), "(NaN+NaNi)"}, | |
| {"%.1f", complex(posInf, posInf), "(+Inf+Infi)"}, | |
| {"% f", complex(posInf, posInf), "( Inf+Infi)"}, | |
| {"% f", complex(negInf, negInf), "(-Inf-Infi)"}, | |
| {"% f", complex(NaN, NaN), "( NaN+NaNi)"}, | |
| {"%8e", complex(posInf, posInf), "( +Inf +Infi)"}, | |
| {"% 8E", complex(posInf, posInf), "( Inf +Infi)"}, | |
| {"%+8f", complex(negInf, negInf), "( -Inf -Infi)"}, | |
| {"% +8g", complex(negInf, negInf), "( -Inf -Infi)"}, | |
| {"% -8G", complex(NaN, NaN), "( NaN +NaN i)"}, | |
| {"%+-8b", complex(NaN, NaN), "(+NaN +NaN i)"}, | |
| // Zero padding does not apply to infinities and NaN. | |
| {"%08f", complex(posInf, posInf), "( +Inf +Infi)"}, | |
| {"%-08g", complex(negInf, negInf), "(-Inf -Inf i)"}, | |
| {"%-08G", complex(NaN, NaN), "(NaN +NaN i)"}, | |
| // old test/fmt_test.go | |
| {"%e", 1.0, "1.000000e+00"}, | |
| {"%e", 1234.5678e3, "1.234568e+06"}, | |
| {"%e", 1234.5678e-8, "1.234568e-05"}, | |
| {"%e", -7.0, "-7.000000e+00"}, | |
| {"%e", -1e-9, "-1.000000e-09"}, | |
| {"%f", 1234.5678e3, "1234567.800000"}, | |
| {"%f", 1234.5678e-8, "0.000012"}, | |
| {"%f", -7.0, "-7.000000"}, | |
| {"%f", -1e-9, "-0.000000"}, | |
| {"%g", 1234.5678e3, "1.2345678e+06"}, | |
| {"%g", float32(1234.5678e3), "1.2345678e+06"}, | |
| {"%g", 1234.5678e-8, "1.2345678e-05"}, | |
| {"%g", -7.0, "-7"}, | |
| {"%g", -1e-9, "-1e-09"}, | |
| {"%g", float32(-1e-9), "-1e-09"}, | |
| {"%E", 1.0, "1.000000E+00"}, | |
| {"%E", 1234.5678e3, "1.234568E+06"}, | |
| {"%E", 1234.5678e-8, "1.234568E-05"}, | |
| {"%E", -7.0, "-7.000000E+00"}, | |
| {"%E", -1e-9, "-1.000000E-09"}, | |
| {"%G", 1234.5678e3, "1.2345678E+06"}, | |
| {"%G", float32(1234.5678e3), "1.2345678E+06"}, | |
| {"%G", 1234.5678e-8, "1.2345678E-05"}, | |
| {"%G", -7.0, "-7"}, | |
| {"%G", -1e-9, "-1E-09"}, | |
| {"%G", float32(-1e-9), "-1E-09"}, | |
| {"%20.5s", "qwertyuiop", " qwert"}, | |
| {"%.5s", "qwertyuiop", "qwert"}, | |
| {"%-20.5s", "qwertyuiop", "qwert "}, | |
| {"%20c", 'x', " x"}, | |
| {"%-20c", 'x', "x "}, | |
| {"%20.6e", 1.2345e3, " 1.234500e+03"}, | |
| {"%20.6e", 1.2345e-3, " 1.234500e-03"}, | |
| {"%20e", 1.2345e3, " 1.234500e+03"}, | |
| {"%20e", 1.2345e-3, " 1.234500e-03"}, | |
| {"%20.8e", 1.2345e3, " 1.23450000e+03"}, | |
| {"%20f", 1.23456789e3, " 1234.567890"}, | |
| {"%20f", 1.23456789e-3, " 0.001235"}, | |
| {"%20f", 12345678901.23456789, " 12345678901.234568"}, | |
| {"%-20f", 1.23456789e3, "1234.567890 "}, | |
| {"%20.8f", 1.23456789e3, " 1234.56789000"}, | |
| {"%20.8f", 1.23456789e-3, " 0.00123457"}, | |
| {"%g", 1.23456789e3, "1234.56789"}, | |
| {"%g", 1.23456789e-3, "0.00123456789"}, | |
| {"%g", 1.23456789e20, "1.23456789e+20"}, | |
| // arrays | |
| {"%v", array, "[1 2 3 4 5]"}, | |
| {"%v", iarray, "[1 hello 2.5 <nil>]"}, | |
| {"%v", barray, "[1 2 3 4 5]"}, | |
| {"%v", &array, "&[1 2 3 4 5]"}, | |
| {"%v", &iarray, "&[1 hello 2.5 <nil>]"}, | |
| {"%v", &barray, "&[1 2 3 4 5]"}, | |
| // slices | |
| {"%v", slice, "[1 2 3 4 5]"}, | |
| {"%v", islice, "[1 hello 2.5 <nil>]"}, | |
| {"%v", bslice, "[1 2 3 4 5]"}, | |
| {"%v", &slice, "&[1 2 3 4 5]"}, | |
| {"%v", &islice, "&[1 hello 2.5 <nil>]"}, | |
| {"%v", &bslice, "&[1 2 3 4 5]"}, | |
| // byte arrays and slices with %b,%c,%d,%o,%U and %v | |
| {"%b", [3]byte{65, 66, 67}, "[1000001 1000010 1000011]"}, | |
| {"%c", [3]byte{65, 66, 67}, "[A B C]"}, | |
| {"%d", [3]byte{65, 66, 67}, "[65 66 67]"}, | |
| {"%o", [3]byte{65, 66, 67}, "[101 102 103]"}, | |
| {"%U", [3]byte{65, 66, 67}, "[U+0041 U+0042 U+0043]"}, | |
| {"%v", [3]byte{65, 66, 67}, "[65 66 67]"}, | |
| {"%v", [1]byte{123}, "[123]"}, | |
| {"%012v", []byte{}, "[]"}, | |
| {"%#012v", []byte{}, "[]byte{}"}, | |
| {"%6v", []byte{1, 11, 111}, "[ 1 11 111]"}, | |
| {"%06v", []byte{1, 11, 111}, "[000001 000011 000111]"}, | |
| {"%-6v", []byte{1, 11, 111}, "[1 11 111 ]"}, | |
| {"%-06v", []byte{1, 11, 111}, "[1 11 111 ]"}, | |
| {"%#v", []byte{1, 11, 111}, "[]byte{0x1, 0xb, 0x6f}"}, | |
| {"%#6v", []byte{1, 11, 111}, "[]byte{ 0x1, 0xb, 0x6f}"}, | |
| {"%#06v", []byte{1, 11, 111}, "[]byte{0x000001, 0x00000b, 0x00006f}"}, | |
| {"%#-6v", []byte{1, 11, 111}, "[]byte{0x1 , 0xb , 0x6f }"}, | |
| {"%#-06v", []byte{1, 11, 111}, "[]byte{0x1 , 0xb , 0x6f }"}, | |
| // f.space should and f.plus should not have an effect with %v. | |
| {"% v", []byte{1, 11, 111}, "[ 1 11 111]"}, | |
| {"%+v", [3]byte{1, 11, 111}, "[1 11 111]"}, | |
| {"%# -6v", []byte{1, 11, 111}, "[]byte{ 0x1 , 0xb , 0x6f }"}, | |
| {"%#+-6v", [3]byte{1, 11, 111}, "[3]uint8{0x1 , 0xb , 0x6f }"}, | |
| // f.space and f.plus should have an effect with %d. | |
| {"% d", []byte{1, 11, 111}, "[ 1 11 111]"}, | |
| {"%+d", [3]byte{1, 11, 111}, "[+1 +11 +111]"}, | |
| {"%# -6d", []byte{1, 11, 111}, "[ 1 11 111 ]"}, | |
| {"%#+-6d", [3]byte{1, 11, 111}, "[+1 +11 +111 ]"}, | |
| // floates with %v | |
| {"%v", 1.2345678, "1.2345678"}, | |
| {"%v", float32(1.2345678), "1.2345678"}, | |
| // complexes with %v | |
| {"%v", 1 + 2i, "(1+2i)"}, | |
| {"%v", complex64(1 + 2i), "(1+2i)"}, | |
| // structs | |
| {"%v", A{1, 2, "a", []int{1, 2}}, `{1 2 a [1 2]}`}, | |
| {"%+v", A{1, 2, "a", []int{1, 2}}, `{i:1 j:2 s:a x:[1 2]}`}, | |
| // +v on structs with Stringable items | |
| {"%+v", B{1, 2}, `{I:<1> j:2}`}, | |
| {"%+v", C{1, B{2, 3}}, `{i:1 B:{I:<2> j:3}}`}, | |
| // other formats on Stringable items | |
| {"%s", I(23), `<23>`}, | |
| {"%q", I(23), `"<23>"`}, | |
| {"%x", I(23), `3c32333e`}, | |
| {"%#x", I(23), `0x3c32333e`}, | |
| {"%# x", I(23), `0x3c 0x32 0x33 0x3e`}, | |
| // Stringer applies only to string formats. | |
| {"%d", I(23), `23`}, | |
| // Stringer applies to the extracted value. | |
| {"%s", reflect.ValueOf(I(23)), `<23>`}, | |
| // go syntax | |
| {"%#v", A{1, 2, "a", []int{1, 2}}, `fmt_test.A{i:1, j:0x2, s:"a", x:[]int{1, 2}}`}, | |
| {"%#v", new(byte), "(*uint8)(0xPTR)"}, | |
| {"%#v", TestFmtInterface, "(func(*testing.T))(0xPTR)"}, | |
| {"%#v", make(chan int), "(chan int)(0xPTR)"}, | |
| {"%#v", uint64(1<<64 - 1), "0xffffffffffffffff"}, | |
| {"%#v", 1000000000, "1000000000"}, | |
| {"%#v", map[string]int{"a": 1}, `map[string]int{"a":1}`}, | |
| {"%#v", map[string]B{"a": {1, 2}}, `map[string]fmt_test.B{"a":fmt_test.B{I:1, j:2}}`}, | |
| {"%#v", []string{"a", "b"}, `[]string{"a", "b"}`}, | |
| {"%#v", SI{}, `fmt_test.SI{I:interface {}(nil)}`}, | |
| {"%#v", []int(nil), `[]int(nil)`}, | |
| {"%#v", []int{}, `[]int{}`}, | |
| {"%#v", array, `[5]int{1, 2, 3, 4, 5}`}, | |
| {"%#v", &array, `&[5]int{1, 2, 3, 4, 5}`}, | |
| {"%#v", iarray, `[4]interface {}{1, "hello", 2.5, interface {}(nil)}`}, | |
| {"%#v", &iarray, `&[4]interface {}{1, "hello", 2.5, interface {}(nil)}`}, | |
| {"%#v", map[int]byte(nil), `map[int]uint8(nil)`}, | |
| {"%#v", map[int]byte{}, `map[int]uint8{}`}, | |
| {"%#v", "foo", `"foo"`}, | |
| {"%#v", barray, `[5]fmt_test.renamedUint8{0x1, 0x2, 0x3, 0x4, 0x5}`}, | |
| {"%#v", bslice, `[]fmt_test.renamedUint8{0x1, 0x2, 0x3, 0x4, 0x5}`}, | |
| {"%#v", []int32(nil), "[]int32(nil)"}, | |
| {"%#v", 1.2345678, "1.2345678"}, | |
| {"%#v", float32(1.2345678), "1.2345678"}, | |
| // Only print []byte and []uint8 as type []byte if they appear at the top level. | |
| {"%#v", []byte(nil), "[]byte(nil)"}, | |
| {"%#v", []uint8(nil), "[]byte(nil)"}, | |
| {"%#v", []byte{}, "[]byte{}"}, | |
| {"%#v", []uint8{}, "[]byte{}"}, | |
| {"%#v", reflect.ValueOf([]byte{}), "[]uint8{}"}, | |
| {"%#v", reflect.ValueOf([]uint8{}), "[]uint8{}"}, | |
| {"%#v", &[]byte{}, "&[]uint8{}"}, | |
| {"%#v", &[]byte{}, "&[]uint8{}"}, | |
| {"%#v", [3]byte{}, "[3]uint8{0x0, 0x0, 0x0}"}, | |
| {"%#v", [3]uint8{}, "[3]uint8{0x0, 0x0, 0x0}"}, | |
| // slices with other formats | |
| {"%#x", []int{1, 2, 15}, `[0x1 0x2 0xf]`}, | |
| {"%x", []int{1, 2, 15}, `[1 2 f]`}, | |
| {"%d", []int{1, 2, 15}, `[1 2 15]`}, | |
| {"%d", []byte{1, 2, 15}, `[1 2 15]`}, | |
| {"%q", []string{"a", "b"}, `["a" "b"]`}, | |
| {"% 02x", []byte{1}, "01"}, | |
| {"% 02x", []byte{1, 2, 3}, "01 02 03"}, | |
| // Padding with byte slices. | |
| {"%2x", []byte{}, " "}, | |
| {"%#2x", []byte{}, " "}, | |
| {"% 02x", []byte{}, "00"}, | |
| {"%# 02x", []byte{}, "00"}, | |
| {"%-2x", []byte{}, " "}, | |
| {"%-02x", []byte{}, " "}, | |
| {"%8x", []byte{0xab}, " ab"}, | |
| {"% 8x", []byte{0xab}, " ab"}, | |
| {"%#8x", []byte{0xab}, " 0xab"}, | |
| {"%# 8x", []byte{0xab}, " 0xab"}, | |
| {"%08x", []byte{0xab}, "000000ab"}, | |
| {"% 08x", []byte{0xab}, "000000ab"}, | |
| {"%#08x", []byte{0xab}, "00000xab"}, | |
| {"%# 08x", []byte{0xab}, "00000xab"}, | |
| {"%10x", []byte{0xab, 0xcd}, " abcd"}, | |
| {"% 10x", []byte{0xab, 0xcd}, " ab cd"}, | |
| {"%#10x", []byte{0xab, 0xcd}, " 0xabcd"}, | |
| {"%# 10x", []byte{0xab, 0xcd}, " 0xab 0xcd"}, | |
| {"%010x", []byte{0xab, 0xcd}, "000000abcd"}, | |
| {"% 010x", []byte{0xab, 0xcd}, "00000ab cd"}, | |
| {"%#010x", []byte{0xab, 0xcd}, "00000xabcd"}, | |
| {"%# 010x", []byte{0xab, 0xcd}, "00xab 0xcd"}, | |
| {"%-10X", []byte{0xab}, "AB "}, | |
| {"% -010X", []byte{0xab}, "AB "}, | |
| {"%#-10X", []byte{0xab, 0xcd}, "0XABCD "}, | |
| {"%# -010X", []byte{0xab, 0xcd}, "0XAB 0XCD "}, | |
| // Same for strings | |
| {"%2x", "", " "}, | |
| {"%#2x", "", " "}, | |
| {"% 02x", "", "00"}, | |
| {"%# 02x", "", "00"}, | |
| {"%-2x", "", " "}, | |
| {"%-02x", "", " "}, | |
| {"%8x", "\xab", " ab"}, | |
| {"% 8x", "\xab", " ab"}, | |
| {"%#8x", "\xab", " 0xab"}, | |
| {"%# 8x", "\xab", " 0xab"}, | |
| {"%08x", "\xab", "000000ab"}, | |
| {"% 08x", "\xab", "000000ab"}, | |
| {"%#08x", "\xab", "00000xab"}, | |
| {"%# 08x", "\xab", "00000xab"}, | |
| {"%10x", "\xab\xcd", " abcd"}, | |
| {"% 10x", "\xab\xcd", " ab cd"}, | |
| {"%#10x", "\xab\xcd", " 0xabcd"}, | |
| {"%# 10x", "\xab\xcd", " 0xab 0xcd"}, | |
| {"%010x", "\xab\xcd", "000000abcd"}, | |
| {"% 010x", "\xab\xcd", "00000ab cd"}, | |
| {"%#010x", "\xab\xcd", "00000xabcd"}, | |
| {"%# 010x", "\xab\xcd", "00xab 0xcd"}, | |
| {"%-10X", "\xab", "AB "}, | |
| {"% -010X", "\xab", "AB "}, | |
| {"%#-10X", "\xab\xcd", "0XABCD "}, | |
| {"%# -010X", "\xab\xcd", "0XAB 0XCD "}, | |
| // renamings | |
| {"%v", renamedBool(true), "true"}, | |
| {"%d", renamedBool(true), "%!d(fmt_test.renamedBool=true)"}, | |
| {"%o", renamedInt(8), "10"}, | |
| {"%d", renamedInt8(-9), "-9"}, | |
| {"%v", renamedInt16(10), "10"}, | |
| {"%v", renamedInt32(-11), "-11"}, | |
| {"%X", renamedInt64(255), "FF"}, | |
| {"%v", renamedUint(13), "13"}, | |
| {"%o", renamedUint8(14), "16"}, | |
| {"%X", renamedUint16(15), "F"}, | |
| {"%d", renamedUint32(16), "16"}, | |
| {"%X", renamedUint64(17), "11"}, | |
| {"%o", renamedUintptr(18), "22"}, | |
| {"%x", renamedString("thing"), "7468696e67"}, | |
| {"%d", renamedBytes([]byte{1, 2, 15}), `[1 2 15]`}, | |
| {"%q", renamedBytes([]byte("hello")), `"hello"`}, | |
| {"%x", []renamedUint8{'h', 'e', 'l', 'l', 'o'}, "68656c6c6f"}, | |
| {"%X", []renamedUint8{'h', 'e', 'l', 'l', 'o'}, "68656C6C6F"}, | |
| {"%s", []renamedUint8{'h', 'e', 'l', 'l', 'o'}, "hello"}, | |
| {"%q", []renamedUint8{'h', 'e', 'l', 'l', 'o'}, `"hello"`}, | |
| {"%v", renamedFloat32(22), "22"}, | |
| {"%v", renamedFloat64(33), "33"}, | |
| {"%v", renamedComplex64(3 + 4i), "(3+4i)"}, | |
| {"%v", renamedComplex128(4 - 3i), "(4-3i)"}, | |
| // Formatter | |
| {"%x", F(1), "<x=F(1)>"}, | |
| {"%x", G(2), "2"}, | |
| {"%+v", S{F(4), G(5)}, "{F:<v=F(4)> G:5}"}, | |
| // GoStringer | |
| {"%#v", G(6), "GoString(6)"}, | |
| {"%#v", S{F(7), G(8)}, "fmt_test.S{F:<v=F(7)>, G:GoString(8)}"}, | |
| // %T | |
| {"%T", byte(0), "uint8"}, | |
| {"%T", reflect.ValueOf(nil), "reflect.Value"}, | |
| {"%T", (4 - 3i), "complex128"}, | |
| {"%T", renamedComplex128(4 - 3i), "fmt_test.renamedComplex128"}, | |
| {"%T", intVar, "int"}, | |
| {"%6T", &intVar, " *int"}, | |
| {"%10T", nil, " <nil>"}, | |
| {"%-10T", nil, "<nil> "}, | |
| // %p with pointers | |
| {"%p", (*int)(nil), "0x0"}, | |
| {"%#p", (*int)(nil), "0"}, | |
| {"%p", &intVar, "0xPTR"}, | |
| {"%#p", &intVar, "PTR"}, | |
| {"%p", &array, "0xPTR"}, | |
| {"%p", &slice, "0xPTR"}, | |
| {"%8.2p", (*int)(nil), " 0x00"}, | |
| {"%-20.16p", &intVar, "0xPTR "}, | |
| // %p on non-pointers | |
| {"%p", make(chan int), "0xPTR"}, | |
| {"%p", make(map[int]int), "0xPTR"}, | |
| {"%p", func() {}, "0xPTR"}, | |
| {"%p", 27, "%!p(int=27)"}, // not a pointer at all | |
| {"%p", nil, "%!p(<nil>)"}, // nil on its own has no type ... | |
| {"%#p", nil, "%!p(<nil>)"}, // ... and hence is not a pointer type. | |
| // pointers with specified base | |
| {"%b", &intVar, "PTR_b"}, | |
| {"%d", &intVar, "PTR_d"}, | |
| {"%o", &intVar, "PTR_o"}, | |
| {"%x", &intVar, "PTR_x"}, | |
| {"%X", &intVar, "PTR_X"}, | |
| // %v on pointers | |
| {"%v", nil, "<nil>"}, | |
| {"%#v", nil, "<nil>"}, | |
| {"%v", (*int)(nil), "<nil>"}, | |
| {"%#v", (*int)(nil), "(*int)(nil)"}, | |
| {"%v", &intVar, "0xPTR"}, | |
| {"%#v", &intVar, "(*int)(0xPTR)"}, | |
| {"%8.2v", (*int)(nil), " <nil>"}, | |
| {"%-20.16v", &intVar, "0xPTR "}, | |
| // string method on pointer | |
| {"%s", &pValue, "String(p)"}, // String method... | |
| {"%p", &pValue, "0xPTR"}, // ... is not called with %p. | |
| // %d on Stringer should give integer if possible | |
| {"%s", time.Time{}.Month(), "January"}, | |
| {"%d", time.Time{}.Month(), "1"}, | |
| // erroneous things | |
| {"", nil, "%!(EXTRA <nil>)"}, | |
| {"", 2, "%!(EXTRA int=2)"}, | |
| {"no args", "hello", "no args%!(EXTRA string=hello)"}, | |
| {"%s %", "hello", "hello %!(NOVERB)"}, | |
| {"%s %.2", "hello", "hello %!(NOVERB)"}, | |
| {"%017091901790959340919092959340919017929593813360", 0, "%!(NOVERB)%!(EXTRA int=0)"}, | |
| {"%184467440737095516170v", 0, "%!(NOVERB)%!(EXTRA int=0)"}, | |
| // Extra argument errors should format without flags set. | |
| {"%010.2", "12345", "%!(NOVERB)%!(EXTRA string=12345)"}, | |
| // The "<nil>" show up because maps are printed by | |
| // first obtaining a list of keys and then looking up | |
| // each key. Since NaNs can be map keys but cannot | |
| // be fetched directly, the lookup fails and returns a | |
| // zero reflect.Value, which formats as <nil>. | |
| // This test is just to check that it shows the two NaNs at all. | |
| {"%v", map[float64]int{NaN: 1, NaN: 2}, "map[NaN:<nil> NaN:<nil>]"}, | |
| // Comparison of padding rules with C printf. | |
| /* | |
| C program: | |
| #include <stdio.h> | |
| char *format[] = { | |
| "[%.2f]", | |
| "[% .2f]", | |
| "[%+.2f]", | |
| "[%7.2f]", | |
| "[% 7.2f]", | |
| "[%+7.2f]", | |
| "[% +7.2f]", | |
| "[%07.2f]", | |
| "[% 07.2f]", | |
| "[%+07.2f]", | |
| "[% +07.2f]" | |
| }; | |
| int main(void) { | |
| int i; | |
| for(i = 0; i < 11; i++) { | |
| printf("%s: ", format[i]); | |
| printf(format[i], 1.0); | |
| printf(" "); | |
| printf(format[i], -1.0); | |
| printf("\n"); | |
| } | |
| } | |
| Output: | |
| [%.2f]: [1.00] [-1.00] | |
| [% .2f]: [ 1.00] [-1.00] | |
| [%+.2f]: [+1.00] [-1.00] | |
| [%7.2f]: [ 1.00] [ -1.00] | |
| [% 7.2f]: [ 1.00] [ -1.00] | |
| [%+7.2f]: [ +1.00] [ -1.00] | |
| [% +7.2f]: [ +1.00] [ -1.00] | |
| [%07.2f]: [0001.00] [-001.00] | |
| [% 07.2f]: [ 001.00] [-001.00] | |
| [%+07.2f]: [+001.00] [-001.00] | |
| [% +07.2f]: [+001.00] [-001.00] | |
| */ | |
| {"%.2f", 1.0, "1.00"}, | |
| {"%.2f", -1.0, "-1.00"}, | |
| {"% .2f", 1.0, " 1.00"}, | |
| {"% .2f", -1.0, "-1.00"}, | |
| {"%+.2f", 1.0, "+1.00"}, | |
| {"%+.2f", -1.0, "-1.00"}, | |
| {"%7.2f", 1.0, " 1.00"}, | |
| {"%7.2f", -1.0, " -1.00"}, | |
| {"% 7.2f", 1.0, " 1.00"}, | |
| {"% 7.2f", -1.0, " -1.00"}, | |
| {"%+7.2f", 1.0, " +1.00"}, | |
| {"%+7.2f", -1.0, " -1.00"}, | |
| {"% +7.2f", 1.0, " +1.00"}, | |
| {"% +7.2f", -1.0, " -1.00"}, | |
| {"%07.2f", 1.0, "0001.00"}, | |
| {"%07.2f", -1.0, "-001.00"}, | |
| {"% 07.2f", 1.0, " 001.00"}, | |
| {"% 07.2f", -1.0, "-001.00"}, | |
| {"%+07.2f", 1.0, "+001.00"}, | |
| {"%+07.2f", -1.0, "-001.00"}, | |
| {"% +07.2f", 1.0, "+001.00"}, | |
| {"% +07.2f", -1.0, "-001.00"}, | |
| // Complex numbers: exhaustively tested in TestComplexFormatting. | |
| {"%7.2f", 1 + 2i, "( 1.00 +2.00i)"}, | |
| {"%+07.2f", -1 - 2i, "(-001.00-002.00i)"}, | |
| // Use spaces instead of zero if padding to the right. | |
| {"%0-5s", "abc", "abc "}, | |
| {"%-05.1f", 1.0, "1.0 "}, | |
| // float and complex formatting should not change the padding width | |
| // for other elements. See issue 14642. | |
| {"%06v", []interface{}{+10.0, 10}, "[000010 000010]"}, | |
| {"%06v", []interface{}{-10.0, 10}, "[-00010 000010]"}, | |
| {"%06v", []interface{}{+10.0 + 10i, 10}, "[(000010+00010i) 000010]"}, | |
| {"%06v", []interface{}{-10.0 + 10i, 10}, "[(-00010+00010i) 000010]"}, | |
| // integer formatting should not alter padding for other elements. | |
| {"%03.6v", []interface{}{1, 2.0, "x"}, "[000001 002 00x]"}, | |
| {"%03.0v", []interface{}{0, 2.0, "x"}, "[ 002 000]"}, | |
| // Complex fmt used to leave the plus flag set for future entries in the array | |
| // causing +2+0i and +3+0i instead of 2+0i and 3+0i. | |
| {"%v", []complex64{1, 2, 3}, "[(1+0i) (2+0i) (3+0i)]"}, | |
| {"%v", []complex128{1, 2, 3}, "[(1+0i) (2+0i) (3+0i)]"}, | |
| // Incomplete format specification caused crash. | |
| {"%.", 3, "%!.(int=3)"}, | |
| // Padding for complex numbers. Has been bad, then fixed, then bad again. | |
| {"%+10.2f", +104.66 + 440.51i, "( +104.66 +440.51i)"}, | |
| {"%+10.2f", -104.66 + 440.51i, "( -104.66 +440.51i)"}, | |
| {"%+10.2f", +104.66 - 440.51i, "( +104.66 -440.51i)"}, | |
| {"%+10.2f", -104.66 - 440.51i, "( -104.66 -440.51i)"}, | |
| {"%+010.2f", +104.66 + 440.51i, "(+000104.66+000440.51i)"}, | |
| {"%+010.2f", -104.66 + 440.51i, "(-000104.66+000440.51i)"}, | |
| {"%+010.2f", +104.66 - 440.51i, "(+000104.66-000440.51i)"}, | |
| {"%+010.2f", -104.66 - 440.51i, "(-000104.66-000440.51i)"}, | |
| // []T where type T is a byte with a Stringer method. | |
| {"%v", byteStringerSlice, "[X X X X X]"}, | |
| {"%s", byteStringerSlice, "hello"}, | |
| {"%q", byteStringerSlice, "\"hello\""}, | |
| {"%x", byteStringerSlice, "68656c6c6f"}, | |
| {"%X", byteStringerSlice, "68656C6C6F"}, | |
| {"%#v", byteStringerSlice, "[]fmt_test.byteStringer{0x68, 0x65, 0x6c, 0x6c, 0x6f}"}, | |
| // And the same for Formatter. | |
| {"%v", byteFormatterSlice, "[X X X X X]"}, | |
| {"%s", byteFormatterSlice, "hello"}, | |
| {"%q", byteFormatterSlice, "\"hello\""}, | |
| {"%x", byteFormatterSlice, "68656c6c6f"}, | |
| {"%X", byteFormatterSlice, "68656C6C6F"}, | |
| // This next case seems wrong, but the docs say the Formatter wins here. | |
| {"%#v", byteFormatterSlice, "[]fmt_test.byteFormatter{X, X, X, X, X}"}, | |
| // reflect.Value handled specially in Go 1.5, making it possible to | |
| // see inside non-exported fields (which cannot be accessed with Interface()). | |
| // Issue 8965. | |
| {"%v", reflect.ValueOf(A{}).Field(0).String(), "<int Value>"}, // Equivalent to the old way. | |
| {"%v", reflect.ValueOf(A{}).Field(0), "0"}, // Sees inside the field. | |
| // verbs apply to the extracted value too. | |
| {"%s", reflect.ValueOf("hello"), "hello"}, | |
| {"%q", reflect.ValueOf("hello"), `"hello"`}, | |
| {"%#04x", reflect.ValueOf(256), "0x0100"}, | |
| // invalid reflect.Value doesn't crash. | |
| {"%v", reflect.Value{}, "<invalid reflect.Value>"}, | |
| {"%v", &reflect.Value{}, "<invalid Value>"}, | |
| {"%v", SI{reflect.Value{}}, "{<invalid Value>}"}, | |
| // Tests to check that not supported verbs generate an error string. | |
| {"%☠", nil, "%!☠(<nil>)"}, | |
| {"%☠", interface{}(nil), "%!☠(<nil>)"}, | |
| {"%☠", int(0), "%!☠(int=0)"}, | |
| {"%☠", uint(0), "%!☠(uint=0)"}, | |
| {"%☠", []byte{0, 1}, "[%!☠(uint8=0) %!☠(uint8=1)]"}, | |
| {"%☠", []uint8{0, 1}, "[%!☠(uint8=0) %!☠(uint8=1)]"}, | |
| {"%☠", [1]byte{0}, "[%!☠(uint8=0)]"}, | |
| {"%☠", [1]uint8{0}, "[%!☠(uint8=0)]"}, | |
| {"%☠", "hello", "%!☠(string=hello)"}, | |
| {"%☠", 1.2345678, "%!☠(float64=1.2345678)"}, | |
| {"%☠", float32(1.2345678), "%!☠(float32=1.2345678)"}, | |
| {"%☠", 1.2345678 + 1.2345678i, "%!☠(complex128=(1.2345678+1.2345678i))"}, | |
| {"%☠", complex64(1.2345678 + 1.2345678i), "%!☠(complex64=(1.2345678+1.2345678i))"}, | |
| {"%☠", &intVar, "%!☠(*int=0xPTR)"}, | |
| {"%☠", make(chan int), "%!☠(chan int=0xPTR)"}, | |
| {"%☠", func() {}, "%!☠(func()=0xPTR)"}, | |
| {"%☠", reflect.ValueOf(renamedInt(0)), "%!☠(fmt_test.renamedInt=0)"}, | |
| {"%☠", SI{renamedInt(0)}, "{%!☠(fmt_test.renamedInt=0)}"}, | |
| {"%☠", &[]interface{}{I(1), G(2)}, "&[%!☠(fmt_test.I=1) %!☠(fmt_test.G=2)]"}, | |
| {"%☠", SI{&[]interface{}{I(1), G(2)}}, "{%!☠(*[]interface {}=&[1 2])}"}, | |
| {"%☠", reflect.Value{}, "<invalid reflect.Value>"}, | |
| {"%☠", map[float64]int{NaN: 1}, "map[%!☠(float64=NaN):%!☠(<nil>)]"}, | |
| } | |
| // zeroFill generates zero-filled strings of the specified width. The length | |
| // of the suffix (but not the prefix) is compensated for in the width calculation. | |
| func zeroFill(prefix string, width int, suffix string) string { | |
| return prefix + strings.Repeat("0", width-len(suffix)) + suffix | |
| } | |
| func TestSprintf(t *testing.T) { | |
| for _, tt := range fmtTests { | |
| s := Sprintf(tt.fmt, tt.val) | |
| i := strings.Index(tt.out, "PTR") | |
| if i >= 0 && i < len(s) { | |
| var pattern, chars string | |
| switch { | |
| case strings.HasPrefix(tt.out[i:], "PTR_b"): | |
| pattern = "PTR_b" | |
| chars = "01" | |
| case strings.HasPrefix(tt.out[i:], "PTR_o"): | |
| pattern = "PTR_o" | |
| chars = "01234567" | |
| case strings.HasPrefix(tt.out[i:], "PTR_d"): | |
| pattern = "PTR_d" | |
| chars = "0123456789" | |
| case strings.HasPrefix(tt.out[i:], "PTR_x"): | |
| pattern = "PTR_x" | |
| chars = "0123456789abcdef" | |
| case strings.HasPrefix(tt.out[i:], "PTR_X"): | |
| pattern = "PTR_X" | |
| chars = "0123456789ABCDEF" | |
| default: | |
| pattern = "PTR" | |
| chars = "0123456789abcdefABCDEF" | |
| } | |
| p := s[:i] + pattern | |
| for j := i; j < len(s); j++ { | |
| if !strings.ContainsRune(chars, rune(s[j])) { | |
| p += s[j:] | |
| break | |
| } | |
| } | |
| s = p | |
| } | |
| if s != tt.out { | |
| if _, ok := tt.val.(string); ok { | |
| // Don't requote the already-quoted strings. | |
| // It's too confusing to read the errors. | |
| t.Errorf("Sprintf(%q, %q) = <%s> want <%s>", tt.fmt, tt.val, s, tt.out) | |
| } else { | |
| t.Errorf("Sprintf(%q, %v) = %q want %q", tt.fmt, tt.val, s, tt.out) | |
| } | |
| } | |
| } | |
| } | |
| // TestComplexFormatting checks that a complex always formats to the same | |
| // thing as if done by hand with two singleton prints. | |
| func TestComplexFormatting(t *testing.T) { | |
| var yesNo = []bool{true, false} | |
| var values = []float64{1, 0, -1, posInf, negInf, NaN} | |
| for _, plus := range yesNo { | |
| for _, zero := range yesNo { | |
| for _, space := range yesNo { | |
| for _, char := range "fFeEgG" { | |
| realFmt := "%" | |
| if zero { | |
| realFmt += "0" | |
| } | |
| if space { | |
| realFmt += " " | |
| } | |
| if plus { | |
| realFmt += "+" | |
| } | |
| realFmt += "10.2" | |
| realFmt += string(char) | |
| // Imaginary part always has a sign, so force + and ignore space. | |
| imagFmt := "%" | |
| if zero { | |
| imagFmt += "0" | |
| } | |
| imagFmt += "+" | |
| imagFmt += "10.2" | |
| imagFmt += string(char) | |
| for _, realValue := range values { | |
| for _, imagValue := range values { | |
| one := Sprintf(realFmt, complex(realValue, imagValue)) | |
| two := Sprintf("("+realFmt+imagFmt+"i)", realValue, imagValue) | |
| if one != two { | |
| t.Error(f, one, two) | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } | |
| type SE []interface{} // slice of empty; notational compactness. | |
| var reorderTests = []struct { | |
| fmt string | |
| val SE | |
| out string | |
| }{ | |
| {"%[1]d", SE{1}, "1"}, | |
| {"%[2]d", SE{2, 1}, "1"}, | |
| {"%[2]d %[1]d", SE{1, 2}, "2 1"}, | |
| {"%[2]*[1]d", SE{2, 5}, " 2"}, | |
| {"%6.2f", SE{12.0}, " 12.00"}, // Explicit version of next line. | |
| {"%[3]*.[2]*[1]f", SE{12.0, 2, 6}, " 12.00"}, | |
| {"%[1]*.[2]*[3]f", SE{6, 2, 12.0}, " 12.00"}, | |
| {"%10f", SE{12.0}, " 12.000000"}, | |
| {"%[1]*[3]f", SE{10, 99, 12.0}, " 12.000000"}, | |
| {"%.6f", SE{12.0}, "12.000000"}, // Explicit version of next line. | |
| {"%.[1]*[3]f", SE{6, 99, 12.0}, "12.000000"}, | |
| {"%6.f", SE{12.0}, " 12"}, // // Explicit version of next line; empty precision means zero. | |
| {"%[1]*.[3]f", SE{6, 3, 12.0}, " 12"}, | |
| // An actual use! Print the same arguments twice. | |
| {"%d %d %d %#[1]o %#o %#o", SE{11, 12, 13}, "11 12 13 013 014 015"}, | |
| // Erroneous cases. | |
| {"%[d", SE{2, 1}, "%!d(BADINDEX)"}, | |
| {"%]d", SE{2, 1}, "%!](int=2)d%!(EXTRA int=1)"}, | |
| {"%[]d", SE{2, 1}, "%!d(BADINDEX)"}, | |
| {"%[-3]d", SE{2, 1}, "%!d(BADINDEX)"}, | |
| {"%[99]d", SE{2, 1}, "%!d(BADINDEX)"}, | |
| {"%[3]", SE{2, 1}, "%!(NOVERB)"}, | |
| {"%[1].2d", SE{5, 6}, "%!d(BADINDEX)"}, | |
| {"%[1]2d", SE{2, 1}, "%!d(BADINDEX)"}, | |
| {"%3.[2]d", SE{7}, "%!d(BADINDEX)"}, | |
| {"%.[2]d", SE{7}, "%!d(BADINDEX)"}, | |
| {"%d %d %d %#[1]o %#o %#o %#o", SE{11, 12, 13}, "11 12 13 013 014 015 %!o(MISSING)"}, | |
| {"%[5]d %[2]d %d", SE{1, 2, 3}, "%!d(BADINDEX) 2 3"}, | |
| {"%d %[3]d %d", SE{1, 2}, "1 %!d(BADINDEX) 2"}, // Erroneous index does not affect sequence. | |
| {"%.[]", SE{}, "%!](BADINDEX)"}, // Issue 10675 | |
| {"%.-3d", SE{42}, "%!-(int=42)3d"}, // TODO: Should this set return better error messages? | |
| {"%2147483648d", SE{42}, "%!(NOVERB)%!(EXTRA int=42)"}, | |
| {"%-2147483648d", SE{42}, "%!(NOVERB)%!(EXTRA int=42)"}, | |
| {"%.2147483648d", SE{42}, "%!(NOVERB)%!(EXTRA int=42)"}, | |
| } | |
| func TestReorder(t *testing.T) { | |
| for _, tt := range reorderTests { | |
| s := Sprintf(tt.fmt, tt.val...) | |
| if s != tt.out { | |
| t.Errorf("Sprintf(%q, %v) = <%s> want <%s>", tt.fmt, tt.val, s, tt.out) | |
| } else { | |
| } | |
| } | |
| } | |
| func BenchmarkSprintfPadding(b *testing.B) { | |
| b.RunParallel(func(pb *testing.PB) { | |
| for pb.Next() { | |
| Sprintf("%16f", 1.0) | |
| } | |
| }) | |
| } | |
| func BenchmarkSprintfEmpty(b *testing.B) { | |
| b.RunParallel(func(pb *testing.PB) { | |
| for pb.Next() { | |
| Sprintf("") | |
| } | |
| }) | |
| } | |
| func BenchmarkSprintfString(b *testing.B) { | |
| b.RunParallel(func(pb *testing.PB) { | |
| for pb.Next() { | |
| Sprintf("%s", "hello") | |
| } | |
| }) | |
| } | |
| func BenchmarkSprintfTruncateString(b *testing.B) { | |
| b.RunParallel(func(pb *testing.PB) { | |
| for pb.Next() { | |
| Sprintf("%.3s", "日本語日本語日本語") | |
| } | |
| }) | |
| } | |
| func BenchmarkSprintfQuoteString(b *testing.B) { | |
| b.RunParallel(func(pb *testing.PB) { | |
| for pb.Next() { | |
| Sprintf("%q", "日本語日本語日本語") | |
| } | |
| }) | |
| } | |
| func BenchmarkSprintfInt(b *testing.B) { | |
| b.RunParallel(func(pb *testing.PB) { | |
| for pb.Next() { | |
| Sprintf("%d", 5) | |
| } | |
| }) | |
| } | |
| func BenchmarkSprintfIntInt(b *testing.B) { | |
| b.RunParallel(func(pb *testing.PB) { | |
| for pb.Next() { | |
| Sprintf("%d %d", 5, 6) | |
| } | |
| }) | |
| } | |
| func BenchmarkSprintfPrefixedInt(b *testing.B) { | |
| b.RunParallel(func(pb *testing.PB) { | |
| for pb.Next() { | |
| Sprintf("This is some meaningless prefix text that needs to be scanned %d", 6) | |
| } | |
| }) | |
| } | |
| func BenchmarkSprintfFloat(b *testing.B) { | |
| b.RunParallel(func(pb *testing.PB) { | |
| for pb.Next() { | |
| Sprintf("%g", 5.23184) | |
| } | |
| }) | |
| } | |
| func BenchmarkSprintfComplex(b *testing.B) { | |
| b.RunParallel(func(pb *testing.PB) { | |
| for pb.Next() { | |
| Sprintf("%f", 5.23184+5.23184i) | |
| } | |
| }) | |
| } | |
| func BenchmarkSprintfBoolean(b *testing.B) { | |
| b.RunParallel(func(pb *testing.PB) { | |
| for pb.Next() { | |
| Sprintf("%t", true) | |
| } | |
| }) | |
| } | |
| func BenchmarkSprintfHexString(b *testing.B) { | |
| b.RunParallel(func(pb *testing.PB) { | |
| for pb.Next() { | |
| Sprintf("% #x", "0123456789abcdef") | |
| } | |
| }) | |
| } | |
| func BenchmarkSprintfHexBytes(b *testing.B) { | |
| data := []byte("0123456789abcdef") | |
| b.RunParallel(func(pb *testing.PB) { | |
| for pb.Next() { | |
| Sprintf("% #x", data) | |
| } | |
| }) | |
| } | |
| func BenchmarkSprintfBytes(b *testing.B) { | |
| data := []byte("0123456789abcdef") | |
| b.RunParallel(func(pb *testing.PB) { | |
| for pb.Next() { | |
| Sprintf("%v", data) | |
| } | |
| }) | |
| } | |
| func BenchmarkSprintfStringer(b *testing.B) { | |
| stringer := I(12345) | |
| b.RunParallel(func(pb *testing.PB) { | |
| for pb.Next() { | |
| Sprintf("%v", stringer) | |
| } | |
| }) | |
| } | |
| func BenchmarkSprintfStructure(b *testing.B) { | |
| s := &[]interface{}{SI{12345}, map[int]string{0: "hello"}} | |
| b.RunParallel(func(pb *testing.PB) { | |
| for pb.Next() { | |
| Sprintf("%#v", s) | |
| } | |
| }) | |
| } | |
| func BenchmarkManyArgs(b *testing.B) { | |
| b.RunParallel(func(pb *testing.PB) { | |
| var buf bytes.Buffer | |
| for pb.Next() { | |
| buf.Reset() | |
| Fprintf(&buf, "%2d/%2d/%2d %d:%d:%d %s %s\n", 3, 4, 5, 11, 12, 13, "hello", "world") | |
| } | |
| }) | |
| } | |
| func BenchmarkFprintInt(b *testing.B) { | |
| var buf bytes.Buffer | |
| for i := 0; i < b.N; i++ { | |
| buf.Reset() | |
| Fprint(&buf, 123456) | |
| } | |
| } | |
| func BenchmarkFprintfBytes(b *testing.B) { | |
| data := []byte(string("0123456789")) | |
| var buf bytes.Buffer | |
| for i := 0; i < b.N; i++ { | |
| buf.Reset() | |
| Fprintf(&buf, "%s", data) | |
| } | |
| } | |
| func BenchmarkFprintIntNoAlloc(b *testing.B) { | |
| var x interface{} = 123456 | |
| var buf bytes.Buffer | |
| for i := 0; i < b.N; i++ { | |
| buf.Reset() | |
| Fprint(&buf, x) | |
| } | |
| } | |
| var mallocBuf bytes.Buffer | |
| var mallocPointer *int // A pointer so we know the interface value won't allocate. | |
| var mallocTest = []struct { | |
| count int | |
| desc string | |
| fn func() | |
| }{ | |
| {0, `Sprintf("")`, func() { Sprintf("") }}, | |
| {1, `Sprintf("xxx")`, func() { Sprintf("xxx") }}, | |
| {2, `Sprintf("%x")`, func() { Sprintf("%x", 7) }}, | |
| {2, `Sprintf("%s")`, func() { Sprintf("%s", "hello") }}, | |
| {3, `Sprintf("%x %x")`, func() { Sprintf("%x %x", 7, 112) }}, | |
| {2, `Sprintf("%g")`, func() { Sprintf("%g", float32(3.14159)) }}, // TODO: Can this be 1? | |
| {1, `Fprintf(buf, "%s")`, func() { mallocBuf.Reset(); Fprintf(&mallocBuf, "%s", "hello") }}, | |
| // If the interface value doesn't need to allocate, amortized allocation overhead should be zero. | |
| {0, `Fprintf(buf, "%x %x %x")`, func() { | |
| mallocBuf.Reset() | |
| Fprintf(&mallocBuf, "%x %x %x", mallocPointer, mallocPointer, mallocPointer) | |
| }}, | |
| } | |
| var _ bytes.Buffer | |
| func TestCountMallocs(t *testing.T) { | |
| switch { | |
| case testing.Short(): | |
| t.Skip("skipping malloc count in short mode") | |
| case runtime.GOMAXPROCS(0) > 1: | |
| t.Skip("skipping; GOMAXPROCS>1") | |
| case race.Enabled: | |
| t.Skip("skipping malloc count under race detector") | |
| } | |
| for _, mt := range mallocTest { | |
| mallocs := testing.AllocsPerRun(100, mt.fn) | |
| if got, max := mallocs, float64(mt.count); got > max { | |
| t.Errorf("%s: got %v allocs, want <=%v", mt.desc, got, max) | |
| } | |
| } | |
| } | |
| type flagPrinter struct{} | |
| func (flagPrinter) Format(f State, c rune) { | |
| s := "%" | |
| for i := 0; i < 128; i++ { | |
| if f.Flag(i) { | |
| s += string(i) | |
| } | |
| } | |
| if w, ok := f.Width(); ok { | |
| s += Sprintf("%d", w) | |
| } | |
| if p, ok := f.Precision(); ok { | |
| s += Sprintf(".%d", p) | |
| } | |
| s += string(c) | |
| io.WriteString(f, "["+s+"]") | |
| } | |
| var flagtests = []struct { | |
| in string | |
| out string | |
| }{ | |
| {"%a", "[%a]"}, | |
| {"%-a", "[%-a]"}, | |
| {"%+a", "[%+a]"}, | |
| {"%#a", "[%#a]"}, | |
| {"% a", "[% a]"}, | |
| {"%0a", "[%0a]"}, | |
| {"%1.2a", "[%1.2a]"}, | |
| {"%-1.2a", "[%-1.2a]"}, | |
| {"%+1.2a", "[%+1.2a]"}, | |
| {"%-+1.2a", "[%+-1.2a]"}, | |
| {"%-+1.2abc", "[%+-1.2a]bc"}, | |
| {"%-1.2abc", "[%-1.2a]bc"}, | |
| } | |
| func TestFlagParser(t *testing.T) { | |
| var flagprinter flagPrinter | |
| for _, tt := range flagtests { | |
| s := Sprintf(tt.in, &flagprinter) | |
| if s != tt.out { | |
| t.Errorf("Sprintf(%q, &flagprinter) => %q, want %q", tt.in, s, tt.out) | |
| } | |
| } | |
| } | |
| func TestStructPrinter(t *testing.T) { | |
| type T struct { | |
| a string | |
| b string | |
| c int | |
| } | |
| var s T | |
| s.a = "abc" | |
| s.b = "def" | |
| s.c = 123 | |
| var tests = []struct { | |
| fmt string | |
| out string | |
| }{ | |
| {"%v", "{abc def 123}"}, | |
| {"%+v", "{a:abc b:def c:123}"}, | |
| {"%#v", `fmt_test.T{a:"abc", b:"def", c:123}`}, | |
| } | |
| for _, tt := range tests { | |
| out := Sprintf(tt.fmt, s) | |
| if out != tt.out { | |
| t.Errorf("Sprintf(%q, s) = %#q, want %#q", tt.fmt, out, tt.out) | |
| } | |
| // The same but with a pointer. | |
| out = Sprintf(tt.fmt, &s) | |
| if out != "&"+tt.out { | |
| t.Errorf("Sprintf(%q, &s) = %#q, want %#q", tt.fmt, out, "&"+tt.out) | |
| } | |
| } | |
| } | |
| func TestSlicePrinter(t *testing.T) { | |
| slice := []int{} | |
| s := Sprint(slice) | |
| if s != "[]" { | |
| t.Errorf("empty slice printed as %q not %q", s, "[]") | |
| } | |
| slice = []int{1, 2, 3} | |
| s = Sprint(slice) | |
| if s != "[1 2 3]" { | |
| t.Errorf("slice: got %q expected %q", s, "[1 2 3]") | |
| } | |
| s = Sprint(&slice) | |
| if s != "&[1 2 3]" { | |
| t.Errorf("&slice: got %q expected %q", s, "&[1 2 3]") | |
| } | |
| } | |
| // presentInMap checks map printing using substrings so we don't depend on the | |
| // print order. | |
| func presentInMap(s string, a []string, t *testing.T) { | |
| for i := 0; i < len(a); i++ { | |
| loc := strings.Index(s, a[i]) | |
| if loc < 0 { | |
| t.Errorf("map print: expected to find %q in %q", a[i], s) | |
| } | |
| // make sure the match ends here | |
| loc += len(a[i]) | |
| if loc >= len(s) || (s[loc] != ' ' && s[loc] != ']') { | |
| t.Errorf("map print: %q not properly terminated in %q", a[i], s) | |
| } | |
| } | |
| } | |
| func TestMapPrinter(t *testing.T) { | |
| m0 := make(map[int]string) | |
| s := Sprint(m0) | |
| if s != "map[]" { | |
| t.Errorf("empty map printed as %q not %q", s, "map[]") | |
| } | |
| m1 := map[int]string{1: "one", 2: "two", 3: "three"} | |
| a := []string{"1:one", "2:two", "3:three"} | |
| presentInMap(Sprintf("%v", m1), a, t) | |
| presentInMap(Sprint(m1), a, t) | |
| // Pointer to map prints the same but with initial &. | |
| if !strings.HasPrefix(Sprint(&m1), "&") { | |
| t.Errorf("no initial & for address of map") | |
| } | |
| presentInMap(Sprintf("%v", &m1), a, t) | |
| presentInMap(Sprint(&m1), a, t) | |
| } | |
| func TestEmptyMap(t *testing.T) { | |
| const emptyMapStr = "map[]" | |
| var m map[string]int | |
| s := Sprint(m) | |
| if s != emptyMapStr { | |
| t.Errorf("nil map printed as %q not %q", s, emptyMapStr) | |
| } | |
| m = make(map[string]int) | |
| s = Sprint(m) | |
| if s != emptyMapStr { | |
| t.Errorf("empty map printed as %q not %q", s, emptyMapStr) | |
| } | |
| } | |
| // TestBlank checks that Sprint (and hence Print, Fprint) puts spaces in the | |
| // right places, that is, between arg pairs in which neither is a string. | |
| func TestBlank(t *testing.T) { | |
| got := Sprint("<", 1, ">:", 1, 2, 3, "!") | |
| expect := "<1>:1 2 3!" | |
| if got != expect { | |
| t.Errorf("got %q expected %q", got, expect) | |
| } | |
| } | |
| // TestBlankln checks that Sprintln (and hence Println, Fprintln) puts spaces in | |
| // the right places, that is, between all arg pairs. | |
| func TestBlankln(t *testing.T) { | |
| got := Sprintln("<", 1, ">:", 1, 2, 3, "!") | |
| expect := "< 1 >: 1 2 3 !\n" | |
| if got != expect { | |
| t.Errorf("got %q expected %q", got, expect) | |
| } | |
| } | |
| // TestFormatterPrintln checks Formatter with Sprint, Sprintln, Sprintf. | |
| func TestFormatterPrintln(t *testing.T) { | |
| f := F(1) | |
| expect := "<v=F(1)>\n" | |
| s := Sprint(f, "\n") | |
| if s != expect { | |
| t.Errorf("Sprint wrong with Formatter: expected %q got %q", expect, s) | |
| } | |
| s = Sprintln(f) | |
| if s != expect { | |
| t.Errorf("Sprintln wrong with Formatter: expected %q got %q", expect, s) | |
| } | |
| s = Sprintf("%v\n", f) | |
| if s != expect { | |
| t.Errorf("Sprintf wrong with Formatter: expected %q got %q", expect, s) | |
| } | |
| } | |
| func args(a ...interface{}) []interface{} { return a } | |
| var startests = []struct { | |
| fmt string | |
| in []interface{} | |
| out string | |
| }{ | |
| {"%*d", args(4, 42), " 42"}, | |
| {"%-*d", args(4, 42), "42 "}, | |
| {"%*d", args(-4, 42), "42 "}, | |
| {"%-*d", args(-4, 42), "42 "}, | |
| {"%.*d", args(4, 42), "0042"}, | |
| {"%*.*d", args(8, 4, 42), " 0042"}, | |
| {"%0*d", args(4, 42), "0042"}, | |
| // Some non-int types for width. (Issue 10732). | |
| {"%0*d", args(uint(4), 42), "0042"}, | |
| {"%0*d", args(uint64(4), 42), "0042"}, | |
| {"%0*d", args('\x04', 42), "0042"}, | |
| {"%0*d", args(uintptr(4), 42), "0042"}, | |
| // erroneous | |
| {"%*d", args(nil, 42), "%!(BADWIDTH)42"}, | |
| {"%*d", args(int(1e7), 42), "%!(BADWIDTH)42"}, | |
| {"%*d", args(int(-1e7), 42), "%!(BADWIDTH)42"}, | |
| {"%.*d", args(nil, 42), "%!(BADPREC)42"}, | |
| {"%.*d", args(-1, 42), "%!(BADPREC)42"}, | |
| {"%.*d", args(int(1e7), 42), "%!(BADPREC)42"}, | |
| {"%.*d", args(uint(1e7), 42), "%!(BADPREC)42"}, | |
| {"%.*d", args(uint64(1<<63), 42), "%!(BADPREC)42"}, // Huge negative (-inf). | |
| {"%.*d", args(uint64(1<<64-1), 42), "%!(BADPREC)42"}, // Small negative (-1). | |
| {"%*d", args(5, "foo"), "%!d(string= foo)"}, | |
| {"%*% %d", args(20, 5), "% 5"}, | |
| {"%*", args(4), "%!(NOVERB)"}, | |
| } | |
| func TestWidthAndPrecision(t *testing.T) { | |
| for i, tt := range startests { | |
| s := Sprintf(tt.fmt, tt.in...) | |
| if s != tt.out { | |
| t.Errorf("#%d: %q: got %q expected %q", i, tt.fmt, s, tt.out) | |
| } | |
| } | |
| } | |
| // Panic is a type that panics in String. | |
| type Panic struct { | |
| message interface{} | |
| } | |
| // Value receiver. | |
| func (p Panic) GoString() string { | |
| panic(p.message) | |
| } | |
| // Value receiver. | |
| func (p Panic) String() string { | |
| panic(p.message) | |
| } | |
| // PanicF is a type that panics in Format. | |
| type PanicF struct { | |
| message interface{} | |
| } | |
| // Value receiver. | |
| func (p PanicF) Format(f State, c rune) { | |
| panic(p.message) | |
| } | |
| var panictests = []struct { | |
| fmt string | |
| in interface{} | |
| out string | |
| }{ | |
| // String | |
| {"%s", (*Panic)(nil), "<nil>"}, // nil pointer special case | |
| {"%s", Panic{io.ErrUnexpectedEOF}, "%!s(PANIC=unexpected EOF)"}, | |
| {"%s", Panic{3}, "%!s(PANIC=3)"}, | |
| // GoString | |
| {"%#v", (*Panic)(nil), "<nil>"}, // nil pointer special case | |
| {"%#v", Panic{io.ErrUnexpectedEOF}, "%!v(PANIC=unexpected EOF)"}, | |
| {"%#v", Panic{3}, "%!v(PANIC=3)"}, | |
| // Format | |
| {"%s", (*PanicF)(nil), "<nil>"}, // nil pointer special case | |
| {"%s", PanicF{io.ErrUnexpectedEOF}, "%!s(PANIC=unexpected EOF)"}, | |
| {"%s", PanicF{3}, "%!s(PANIC=3)"}, | |
| } | |
| func TestPanics(t *testing.T) { | |
| for i, tt := range panictests { | |
| s := Sprintf(tt.fmt, tt.in) | |
| if s != tt.out { | |
| t.Errorf("%d: %q: got %q expected %q", i, tt.fmt, s, tt.out) | |
| } | |
| } | |
| } | |
| // recurCount tests that erroneous String routine doesn't cause fatal recursion. | |
| var recurCount = 0 | |
| type Recur struct { | |
| i int | |
| failed *bool | |
| } | |
| func (r *Recur) String() string { | |
| if recurCount++; recurCount > 10 { | |
| *r.failed = true | |
| return "FAIL" | |
| } | |
| // This will call badVerb. Before the fix, that would cause us to recur into | |
| // this routine to print %!p(value). Now we don't call the user's method | |
| // during an error. | |
| return Sprintf("recur@%p value: %d", r, r.i) | |
| } | |
| func TestBadVerbRecursion(t *testing.T) { | |
| failed := false | |
| r := &Recur{3, &failed} | |
| Sprintf("recur@%p value: %d\n", &r, r.i) | |
| if failed { | |
| t.Error("fail with pointer") | |
| } | |
| failed = false | |
| r = &Recur{4, &failed} | |
| Sprintf("recur@%p, value: %d\n", r, r.i) | |
| if failed { | |
| t.Error("fail with value") | |
| } | |
| } | |
| func TestIsSpace(t *testing.T) { | |
| // This tests the internal isSpace function. | |
| // IsSpace = isSpace is defined in export_test.go. | |
| for i := rune(0); i <= unicode.MaxRune; i++ { | |
| if IsSpace(i) != unicode.IsSpace(i) { | |
| t.Errorf("isSpace(%U) = %v, want %v", i, IsSpace(i), unicode.IsSpace(i)) | |
| } | |
| } | |
| } | |
| func TestNilDoesNotBecomeTyped(t *testing.T) { | |
| type A struct{} | |
| type B struct{} | |
| var a *A = nil | |
| var b B = B{} | |
| got := Sprintf("%s %s %s %s %s", nil, a, nil, b, nil) // go vet should complain about this line. | |
| const expect = "%!s(<nil>) %!s(*fmt_test.A=<nil>) %!s(<nil>) {} %!s(<nil>)" | |
| if got != expect { | |
| t.Errorf("expected:\n\t%q\ngot:\n\t%q", expect, got) | |
| } | |
| } | |
| var formatterFlagTests = []struct { | |
| in string | |
| val interface{} | |
| out string | |
| }{ | |
| // scalar values with the (unused by fmt) 'a' verb. | |
| {"%a", flagPrinter{}, "[%a]"}, | |
| {"%-a", flagPrinter{}, "[%-a]"}, | |
| {"%+a", flagPrinter{}, "[%+a]"}, | |
| {"%#a", flagPrinter{}, "[%#a]"}, | |
| {"% a", flagPrinter{}, "[% a]"}, | |
| {"%0a", flagPrinter{}, "[%0a]"}, | |
| {"%1.2a", flagPrinter{}, "[%1.2a]"}, | |
| {"%-1.2a", flagPrinter{}, "[%-1.2a]"}, | |
| {"%+1.2a", flagPrinter{}, "[%+1.2a]"}, | |
| {"%-+1.2a", flagPrinter{}, "[%+-1.2a]"}, | |
| {"%-+1.2abc", flagPrinter{}, "[%+-1.2a]bc"}, | |
| {"%-1.2abc", flagPrinter{}, "[%-1.2a]bc"}, | |
| // composite values with the 'a' verb | |
| {"%a", [1]flagPrinter{}, "[[%a]]"}, | |
| {"%-a", [1]flagPrinter{}, "[[%-a]]"}, | |
| {"%+a", [1]flagPrinter{}, "[[%+a]]"}, | |
| {"%#a", [1]flagPrinter{}, "[[%#a]]"}, | |
| {"% a", [1]flagPrinter{}, "[[% a]]"}, | |
| {"%0a", [1]flagPrinter{}, "[[%0a]]"}, | |
| {"%1.2a", [1]flagPrinter{}, "[[%1.2a]]"}, | |
| {"%-1.2a", [1]flagPrinter{}, "[[%-1.2a]]"}, | |
| {"%+1.2a", [1]flagPrinter{}, "[[%+1.2a]]"}, | |
| {"%-+1.2a", [1]flagPrinter{}, "[[%+-1.2a]]"}, | |
| {"%-+1.2abc", [1]flagPrinter{}, "[[%+-1.2a]]bc"}, | |
| {"%-1.2abc", [1]flagPrinter{}, "[[%-1.2a]]bc"}, | |
| // simple values with the 'v' verb | |
| {"%v", flagPrinter{}, "[%v]"}, | |
| {"%-v", flagPrinter{}, "[%-v]"}, | |
| {"%+v", flagPrinter{}, "[%+v]"}, | |
| {"%#v", flagPrinter{}, "[%#v]"}, | |
| {"% v", flagPrinter{}, "[% v]"}, | |
| {"%0v", flagPrinter{}, "[%0v]"}, | |
| {"%1.2v", flagPrinter{}, "[%1.2v]"}, | |
| {"%-1.2v", flagPrinter{}, "[%-1.2v]"}, | |
| {"%+1.2v", flagPrinter{}, "[%+1.2v]"}, | |
| {"%-+1.2v", flagPrinter{}, "[%+-1.2v]"}, | |
| {"%-+1.2vbc", flagPrinter{}, "[%+-1.2v]bc"}, | |
| {"%-1.2vbc", flagPrinter{}, "[%-1.2v]bc"}, | |
| // composite values with the 'v' verb. | |
| {"%v", [1]flagPrinter{}, "[[%v]]"}, | |
| {"%-v", [1]flagPrinter{}, "[[%-v]]"}, | |
| {"%+v", [1]flagPrinter{}, "[[%+v]]"}, | |
| {"%#v", [1]flagPrinter{}, "[1]fmt_test.flagPrinter{[%#v]}"}, | |
| {"% v", [1]flagPrinter{}, "[[% v]]"}, | |
| {"%0v", [1]flagPrinter{}, "[[%0v]]"}, | |
| {"%1.2v", [1]flagPrinter{}, "[[%1.2v]]"}, | |
| {"%-1.2v", [1]flagPrinter{}, "[[%-1.2v]]"}, | |
| {"%+1.2v", [1]flagPrinter{}, "[[%+1.2v]]"}, | |
| {"%-+1.2v", [1]flagPrinter{}, "[[%+-1.2v]]"}, | |
| {"%-+1.2vbc", [1]flagPrinter{}, "[[%+-1.2v]]bc"}, | |
| {"%-1.2vbc", [1]flagPrinter{}, "[[%-1.2v]]bc"}, | |
| } | |
| func TestFormatterFlags(t *testing.T) { | |
| for _, tt := range formatterFlagTests { | |
| s := Sprintf(tt.in, tt.val) | |
| if s != tt.out { | |
| t.Errorf("Sprintf(%q, %T) = %q, want %q", tt.in, tt.val, s, tt.out) | |
| } | |
| } | |
| } | |
| func TestParsenum(t *testing.T) { | |
| testCases := []struct { | |
| s string | |
| start, end int | |
| num int | |
| isnum bool | |
| newi int | |
| }{ | |
| {"a123", 0, 4, 0, false, 0}, | |
| {"1234", 1, 1, 0, false, 1}, | |
| {"123a", 0, 4, 123, true, 3}, | |
| {"12a3", 0, 4, 12, true, 2}, | |
| {"1234", 0, 4, 1234, true, 4}, | |
| {"1a234", 1, 3, 0, false, 1}, | |
| } | |
| for _, tt := range testCases { | |
| num, isnum, newi := Parsenum(tt.s, tt.start, tt.end) | |
| if num != tt.num || isnum != tt.isnum || newi != tt.newi { | |
| t.Errorf("parsenum(%q, %d, %d) = %d, %v, %d, want %d, %v, %d", tt.s, tt.start, tt.end, num, isnum, newi, tt.num, tt.isnum, tt.newi) | |
| } | |
| } | |
| } |