func BenchmarkCallPlusVFmt(b *testing.B) {
pc, _, _, ok := runtime.Caller(0)
if !ok {
b.Fatal("runtime.Caller(0) failed")
}
b.ResetTimer()
for i := 0; i < b.N; i++ {
fmt.Fprintf(ioutil.Discard, "%+v", stack.Call(pc))
}
}
func TestCallFormat(t *testing.T) {
t.Parallel()
pc, file, line, ok := runtime.Caller(0)
if !ok {
t.Fatal("runtime.Caller(0) failed")
}
gopathSrc := filepath.Join(os.Getenv("GOPATH"), "src")
relFile, err := filepath.Rel(gopathSrc, file)
if err != nil {
t.Fatalf("failed to determine path relative to GOPATH: %v", err)
}
relFile = filepath.ToSlash(relFile)
pc2, file2, line2, ok2 := testType{}.testMethod()
if !ok2 {
t.Fatal("runtime.Caller(0) failed")
}
relFile2, err := filepath.Rel(gopathSrc, file)
if err != nil {
t.Fatalf("failed to determine path relative to GOPATH: %v", err)
}
relFile2 = filepath.ToSlash(relFile2)
data := []struct {
pc uintptr
desc string
fmt string
out string
}{
{0, "error", "%s", "%!s(NOFUNC)"},
{pc, "func", "%s", path.Base(file)},
{pc, "func", "%+s", relFile},
{pc, "func", "%#s", file},
{pc, "func", "%d", fmt.Sprint(line)},
{pc, "func", "%n", "TestCallFormat"},
{pc, "func", "%+n", runtime.FuncForPC(pc).Name()},
{pc, "func", "%v", fmt.Sprint(path.Base(file), ":", line)},
{pc, "func", "%+v", fmt.Sprint(relFile, ":", line)},
{pc, "func", "%#v", fmt.Sprint(file, ":", line)},
{pc, "func", "%v|%[1]n()", fmt.Sprint(path.Base(file), ":", line, "|", "TestCallFormat()")},
{pc2, "meth", "%s", path.Base(file2)},
{pc2, "meth", "%+s", relFile2},
{pc2, "meth", "%#s", file2},
{pc2, "meth", "%d", fmt.Sprint(line2)},
{pc2, "meth", "%n", "testType.testMethod"},
{pc2, "meth", "%+n", runtime.FuncForPC(pc2).Name()},
{pc2, "meth", "%v", fmt.Sprint(path.Base(file2), ":", line2)},
{pc2, "meth", "%+v", fmt.Sprint(relFile2, ":", line2)},
{pc2, "meth", "%#v", fmt.Sprint(file2, ":", line2)},
{pc2, "meth", "%v|%[1]n()", fmt.Sprint(path.Base(file2), ":", line2, "|", "testType.testMethod()")},
}
for _, d := range data {
got := fmt.Sprintf(d.fmt, stack.Call(d.pc))
if got != d.out {
t.Errorf("fmt.Sprintf(%q, Call(%s)) = %s, want %s", d.fmt, d.desc, got, d.out)
}
}
}