cmd/benchcmp: add unit test for formatNs function
Test function is added for formatNs function in the benchcmp package.
Change-Id: I9a1050be9fba3b5e217741d3faadbf5d913d1d4d
Reviewed-on: https://go-review.googlesource.com/c/tools/+/206857
Run-TryBot: Ian Cottrell <iancottrell@google.com>
Reviewed-by: Ian Cottrell <iancottrell@google.com>
diff --git a/cmd/benchcmp/benchcmp_test.go b/cmd/benchcmp/benchcmp_test.go
index 2226079..b79bfaa 100644
--- a/cmd/benchcmp/benchcmp_test.go
+++ b/cmd/benchcmp/benchcmp_test.go
@@ -57,3 +57,27 @@
t.Errorf("filtered bench set incorrectly, want %v have %v", want, have)
}
}
+
+func TestFormatNs(t *testing.T) {
+ tests := []struct {
+ input float64
+ expected string
+ }{
+ {input: 0, expected: "0.00"},
+ {input: 0.2, expected: "0.20"},
+ {input: 2, expected: "2.00"},
+ {input: 2.2, expected: "2.20"},
+ {input: 4, expected: "4.00"},
+ {input: 16, expected: "16.0"},
+ {input: 16.08, expected: "16.1"},
+ {input: 128, expected: "128"},
+ {input: 256.2, expected: "256"},
+ }
+
+ for _, tt := range tests {
+ actual := formatNs(tt.input)
+ if actual != tt.expected {
+ t.Fatalf("%f. got %q, want %q", tt.input, actual, tt.expected)
+ }
+ }
+}
