Add TestFuzz go function to run fuzz tests.

[dzmitryhil]

Description

Add TestFuzz go function to run fuzz tests.

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This change is 

[masihyeganeh]

Reviewed 1 of 1 files at r1, all commit messages.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @dzmitryhil, @miladz68, and @ysv)

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build/golang/go.go line 668 at r1 (raw file):

			line := scanner.Text()
			if strings.HasPrefix(line, fuzzFuncPrefix) {
				lines := strings.Split(strings.TrimLeft(line, funcPrefix), "(")

Here, strings.TrimLeft does not do what you want. It will trim each characters defined in funcPrefix instead of trimming the whole thing, so of a function is defined as func fcfccnnabc() it will extract abc as test name.

You can test it yourself:

const (
	funcPrefix     = "func "
	fuzzFuncPrefix = funcPrefix + "Fuzz"
)

func TestPrefix(t *testing.T) {
	line := "func fcfccnnabc("
	if strings.HasPrefix(line, fuzzFuncPrefix) {
		lines := strings.Split(strings.TrimLeft(line, funcPrefix), "(")
		if len(lines) != 2 {
			t.Fatalf("invalid fuzz test %s", line)
		}
		t.Logf("test name: %s", lines[0])
	}

	t.Log(strings.TrimLeft("func fabc", "func "))
}

[dzmitryhil]

Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @masihyeganeh, @miladz68, and @ysv)

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build/golang/go.go line 668 at r1 (raw file):

Previously, masihyeganeh (Masih Yeganeh) wrote…

Here, strings.TrimLeft does not do what you want. It will trim each characters defined in funcPrefix instead of trimming the whole thing, so of a function is defined as func fcfccnnabc() it will extract abc as test name.

You can test it yourself:

const (
	funcPrefix     = "func "
	fuzzFuncPrefix = funcPrefix + "Fuzz"
)

func TestPrefix(t *testing.T) {
	line := "func fcfccnnabc("
	if strings.HasPrefix(line, fuzzFuncPrefix) {
		lines := strings.Split(strings.TrimLeft(line, funcPrefix), "(")
		if len(lines) != 2 {
			t.Fatalf("invalid fuzz test %s", line)
		}
		t.Logf("test name: %s", lines[0])
	}

	t.Log(strings.TrimLeft("func fabc", "func "))
}

Right, updated.

[masihyeganeh]

Reviewed 1 of 1 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @miladz68 and @ysv)

[miladz68]

Reviewed 1 of 1 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @ysv)