| // Copyright 2010 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. |
| |
| // +build vet_test |
| |
| // This file contains tests for the printf checker. |
| |
| package main |
| |
| import ( |
| "fmt" |
| "unsafe" // just for test case printing unsafe.Pointer |
| ) |
| |
| func UnsafePointerPrintfTest() { |
| var up unsafe.Pointer |
| fmt.Printf("%p, %x %X", up, up, up) |
| } |
| |
| // Error methods that do not satisfy the Error interface and should be checked. |
| type errorTest1 int |
| |
| func (errorTest1) Error(...interface{}) string { |
| return "hi" |
| } |
| |
| type errorTest2 int // Analogous to testing's *T type. |
| func (errorTest2) Error(...interface{}) { |
| } |
| |
| type errorTest3 int |
| |
| func (errorTest3) Error() { // No return value. |
| } |
| |
| type errorTest4 int |
| |
| func (errorTest4) Error() int { // Different return type. |
| return 3 |
| } |
| |
| type errorTest5 int |
| |
| func (errorTest5) error() { // niladic; don't complain if no args (was bug) |
| } |
| |
| // This function never executes, but it serves as a simple test for the program. |
| // Test with make test. |
| func PrintfTests() { |
| var b bool |
| var i int |
| var r rune |
| var s string |
| var x float64 |
| var p *int |
| // Some good format/argtypes |
| fmt.Printf("") |
| fmt.Printf("%b %b", 3, i) |
| fmt.Printf("%c %c %c %c", 3, i, 'x', r) |
| fmt.Printf("%d %d", 3, i) |
| fmt.Printf("%e %e", 3e9, x) |
| fmt.Printf("%E %E", 3e9, x) |
| fmt.Printf("%f %f", 3e9, x) |
| fmt.Printf("%F %F", 3e9, x) |
| fmt.Printf("%g %g", 3e9, x) |
| fmt.Printf("%G %G", 3e9, x) |
| fmt.Printf("%o %o", 3, i) |
| fmt.Printf("%p %p", p, nil) |
| fmt.Printf("%q %q %q %q", 3, i, 'x', r) |
| fmt.Printf("%s %s", "hi", s) |
| fmt.Printf("%t %t", true, b) |
| fmt.Printf("%T %T", 3, i) |
| fmt.Printf("%U %U", 3, i) |
| fmt.Printf("%v %v", 3, i) |
| fmt.Printf("%x %x %x %x", 3, i, "hi", s) |
| fmt.Printf("%X %X %X %X", 3, i, "hi", s) |
| fmt.Printf("%.*s %d %g", 3, "hi", 23, 2.3) |
| // Some bad format/argTypes |
| fmt.Printf("%b", "hi") // ERROR "arg .hi. for printf verb %b of wrong type" |
| fmt.Printf("%c", 2.3) // ERROR "arg 2.3 for printf verb %c of wrong type" |
| fmt.Printf("%d", 2.3) // ERROR "arg 2.3 for printf verb %d of wrong type" |
| fmt.Printf("%e", "hi") // ERROR "arg .hi. for printf verb %e of wrong type" |
| fmt.Printf("%E", true) // ERROR "arg true for printf verb %E of wrong type" |
| fmt.Printf("%f", "hi") // ERROR "arg .hi. for printf verb %f of wrong type" |
| fmt.Printf("%F", 'x') // ERROR "arg 'x' for printf verb %F of wrong type" |
| fmt.Printf("%g", "hi") // ERROR "arg .hi. for printf verb %g of wrong type" |
| fmt.Printf("%G", i) // ERROR "arg i for printf verb %G of wrong type" |
| fmt.Printf("%o", x) // ERROR "arg x for printf verb %o of wrong type" |
| fmt.Printf("%p", 23) // ERROR "arg 23 for printf verb %p of wrong type" |
| fmt.Printf("%q", x) // ERROR "arg x for printf verb %q of wrong type" |
| fmt.Printf("%s", b) // ERROR "arg b for printf verb %s of wrong type" |
| fmt.Printf("%t", 23) // ERROR "arg 23 for printf verb %t of wrong type" |
| fmt.Printf("%U", x) // ERROR "arg x for printf verb %U of wrong type" |
| fmt.Printf("%x", nil) // ERROR "arg nil for printf verb %x of wrong type" |
| fmt.Printf("%X", 2.3) // ERROR "arg 2.3 for printf verb %X of wrong type" |
| fmt.Printf("%.*s %d %g", 3, "hi", 23, 'x') // ERROR "arg 'x' for printf verb %g of wrong type" |
| // TODO |
| fmt.Println() // not an error |
| fmt.Println("%s", "hi") // ERROR "possible formatting directive in Println call" |
| fmt.Printf("%s", "hi", 3) // ERROR "wrong number of args for format in Printf call" |
| fmt.Printf("%"+("s"), "hi", 3) // ERROR "wrong number of args for format in Printf call" |
| fmt.Printf("%s%%%d", "hi", 3) // correct |
| fmt.Printf("%08s", "woo") // correct |
| fmt.Printf("% 8s", "woo") // correct |
| fmt.Printf("%.*d", 3, 3) // correct |
| fmt.Printf("%.*d", 3, 3, 3) // ERROR "wrong number of args for format in Printf call" |
| fmt.Printf("%.*d", "hi", 3) // ERROR "arg .hi. for \* in printf format not of type int" |
| fmt.Printf("%.*d", i, 3) // correct |
| fmt.Printf("%.*d", s, 3) // ERROR "arg s for \* in printf format not of type int" |
| fmt.Printf("%q %q", multi()...) // ok |
| fmt.Printf("%#q", `blah`) // ok |
| printf("now is the time", "buddy") // ERROR "no formatting directive" |
| Printf("now is the time", "buddy") // ERROR "no formatting directive" |
| Printf("hi") // ok |
| const format = "%s %s\n" |
| Printf(format, "hi", "there") |
| Printf(format, "hi") // ERROR "wrong number of args for format in Printf call" |
| f := new(File) |
| f.Warn(0, "%s", "hello", 3) // ERROR "possible formatting directive in Warn call" |
| f.Warnf(0, "%s", "hello", 3) // ERROR "wrong number of args for format in Warnf call" |
| f.Warnf(0, "%r", "hello") // ERROR "unrecognized printf verb" |
| f.Warnf(0, "%#s", "hello") // ERROR "unrecognized printf flag" |
| // Something that satisfies the error interface. |
| var e error |
| fmt.Println(e.Error()) // ok |
| // Something that looks like an error interface but isn't, such as the (*T).Error method |
| // in the testing package. |
| var et1 errorTest1 |
| fmt.Println(et1.Error()) // ERROR "no args in Error call" |
| fmt.Println(et1.Error("hi")) // ok |
| fmt.Println(et1.Error("%d", 3)) // ERROR "possible formatting directive in Error call" |
| var et2 errorTest2 |
| et2.Error() // ERROR "no args in Error call" |
| et2.Error("hi") // ok, not an error method. |
| et2.Error("%d", 3) // ERROR "possible formatting directive in Error call" |
| var et3 errorTest3 |
| et3.Error() // ok, not an error method. |
| var et4 errorTest4 |
| et4.Error() // ok, not an error method. |
| var et5 errorTest5 |
| et5.error() // ok, not an error method. |
| } |
| |
| // printf is used by the test. |
| func printf(format string, args ...interface{}) { |
| panic("don't call - testing only") |
| } |
| |
| // multi is used by the test. |
| func multi() []interface{} { |
| panic("don't call - testing only") |
| } |
