403 lines
8.5 KiB
Go
403 lines
8.5 KiB
Go
package stack_test
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import (
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"fmt"
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"io/ioutil"
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"path"
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"path/filepath"
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"reflect"
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"runtime"
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"strings"
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"testing"
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"github.com/go-stack/stack"
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)
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const importPath = "github.com/go-stack/stack"
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type testType struct{}
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func (tt testType) testMethod() (c stack.Call, pc uintptr, file string, line int, ok bool) {
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c = stack.Caller(0)
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pc, file, line, ok = runtime.Caller(0)
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line--
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return
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}
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func TestCallFormat(t *testing.T) {
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t.Parallel()
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c := stack.Caller(0)
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pc, file, line, ok := runtime.Caller(0)
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line--
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if !ok {
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t.Fatal("runtime.Caller(0) failed")
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}
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relFile := path.Join(importPath, filepath.Base(file))
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c2, pc2, file2, line2, ok2 := testType{}.testMethod()
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if !ok2 {
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t.Fatal("runtime.Caller(0) failed")
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}
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relFile2 := path.Join(importPath, filepath.Base(file2))
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data := []struct {
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c stack.Call
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desc string
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fmt string
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out string
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}{
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{stack.Call{}, "error", "%s", "%!s(NOFUNC)"},
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{c, "func", "%s", path.Base(file)},
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{c, "func", "%+s", relFile},
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{c, "func", "%#s", file},
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{c, "func", "%d", fmt.Sprint(line)},
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{c, "func", "%n", "TestCallFormat"},
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{c, "func", "%+n", runtime.FuncForPC(pc - 1).Name()},
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{c, "func", "%k", "stack_test"},
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{c, "func", "%+k", "github.com/go-stack/stack_test"},
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{c, "func", "%v", fmt.Sprint(path.Base(file), ":", line)},
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{c, "func", "%+v", fmt.Sprint(relFile, ":", line)},
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{c, "func", "%#v", fmt.Sprint(file, ":", line)},
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{c2, "meth", "%s", path.Base(file2)},
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{c2, "meth", "%+s", relFile2},
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{c2, "meth", "%#s", file2},
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{c2, "meth", "%d", fmt.Sprint(line2)},
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{c2, "meth", "%n", "testType.testMethod"},
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{c2, "meth", "%+n", runtime.FuncForPC(pc2).Name()},
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{c2, "meth", "%k", "stack_test"},
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{c2, "meth", "%+k", "github.com/go-stack/stack_test"},
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{c2, "meth", "%v", fmt.Sprint(path.Base(file2), ":", line2)},
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{c2, "meth", "%+v", fmt.Sprint(relFile2, ":", line2)},
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{c2, "meth", "%#v", fmt.Sprint(file2, ":", line2)},
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}
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for _, d := range data {
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got := fmt.Sprintf(d.fmt, d.c)
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if got != d.out {
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t.Errorf("fmt.Sprintf(%q, Call(%s)) = %s, want %s", d.fmt, d.desc, got, d.out)
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}
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}
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}
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func TestCallString(t *testing.T) {
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t.Parallel()
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c := stack.Caller(0)
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_, file, line, ok := runtime.Caller(0)
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line--
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if !ok {
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t.Fatal("runtime.Caller(0) failed")
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}
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c2, _, file2, line2, ok2 := testType{}.testMethod()
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if !ok2 {
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t.Fatal("runtime.Caller(0) failed")
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}
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data := []struct {
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c stack.Call
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desc string
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out string
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}{
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{stack.Call{}, "error", "%!v(NOFUNC)"},
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{c, "func", fmt.Sprint(path.Base(file), ":", line)},
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{c2, "meth", fmt.Sprint(path.Base(file2), ":", line2)},
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}
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for _, d := range data {
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got := d.c.String()
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if got != d.out {
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t.Errorf("got %s, want %s", got, d.out)
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}
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}
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}
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func TestCallMarshalText(t *testing.T) {
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t.Parallel()
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c := stack.Caller(0)
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_, file, line, ok := runtime.Caller(0)
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line--
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if !ok {
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t.Fatal("runtime.Caller(0) failed")
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}
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c2, _, file2, line2, ok2 := testType{}.testMethod()
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if !ok2 {
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t.Fatal("runtime.Caller(0) failed")
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}
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data := []struct {
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c stack.Call
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desc string
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out []byte
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err error
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}{
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{stack.Call{}, "error", nil, stack.ErrNoFunc},
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{c, "func", []byte(fmt.Sprint(path.Base(file), ":", line)), nil},
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{c2, "meth", []byte(fmt.Sprint(path.Base(file2), ":", line2)), nil},
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}
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for _, d := range data {
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text, err := d.c.MarshalText()
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if got, want := err, d.err; got != want {
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t.Errorf("%s: got err %v, want err %v", d.desc, got, want)
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}
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if got, want := text, d.out; !reflect.DeepEqual(got, want) {
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t.Errorf("%s: got %s, want %s", d.desc, got, want)
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}
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}
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}
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func TestCallStackString(t *testing.T) {
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cs, line0 := getTrace(t)
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_, file, line1, ok := runtime.Caller(0)
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line1--
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if !ok {
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t.Fatal("runtime.Caller(0) failed")
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}
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file = path.Base(file)
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if got, want := cs.String(), fmt.Sprintf("[%s:%d %s:%d]", file, line0, file, line1); got != want {
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t.Errorf("\n got %v\nwant %v", got, want)
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}
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}
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func TestCallStackMarshalText(t *testing.T) {
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cs, line0 := getTrace(t)
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_, file, line1, ok := runtime.Caller(0)
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line1--
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if !ok {
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t.Fatal("runtime.Caller(0) failed")
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}
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file = path.Base(file)
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text, _ := cs.MarshalText()
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if got, want := text, []byte(fmt.Sprintf("[%s:%d %s:%d]", file, line0, file, line1)); !reflect.DeepEqual(got, want) {
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t.Errorf("\n got %v\nwant %v", got, want)
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}
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}
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func getTrace(t *testing.T) (stack.CallStack, int) {
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cs := stack.Trace().TrimRuntime()
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_, _, line, ok := runtime.Caller(0)
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line--
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if !ok {
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t.Fatal("runtime.Caller(0) failed")
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}
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return cs, line
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}
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func TestTrimAbove(t *testing.T) {
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trace := trimAbove()
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if got, want := len(trace), 2; got != want {
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t.Errorf("got len(trace) == %v, want %v, trace: %n", got, want, trace)
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}
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if got, want := fmt.Sprintf("%n", trace[1]), "TestTrimAbove"; got != want {
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t.Errorf("got %q, want %q", got, want)
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}
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}
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func trimAbove() stack.CallStack {
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call := stack.Caller(1)
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trace := stack.Trace()
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return trace.TrimAbove(call)
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}
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func TestTrimBelow(t *testing.T) {
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trace := trimBelow()
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if got, want := fmt.Sprintf("%n", trace[0]), "TestTrimBelow"; got != want {
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t.Errorf("got %q, want %q", got, want)
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}
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}
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func trimBelow() stack.CallStack {
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call := stack.Caller(1)
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trace := stack.Trace()
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return trace.TrimBelow(call)
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}
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func TestTrimRuntime(t *testing.T) {
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trace := stack.Trace().TrimRuntime()
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if got, want := len(trace), 1; got != want {
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t.Errorf("got len(trace) == %v, want %v, goroot: %q, trace: %#v", got, want, runtime.GOROOT(), trace)
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}
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}
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func BenchmarkCallVFmt(b *testing.B) {
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c := stack.Caller(0)
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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fmt.Fprint(ioutil.Discard, c)
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}
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}
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func BenchmarkCallPlusVFmt(b *testing.B) {
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c := stack.Caller(0)
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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fmt.Fprintf(ioutil.Discard, "%+v", c)
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}
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}
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func BenchmarkCallSharpVFmt(b *testing.B) {
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c := stack.Caller(0)
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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fmt.Fprintf(ioutil.Discard, "%#v", c)
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}
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}
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func BenchmarkCallSFmt(b *testing.B) {
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c := stack.Caller(0)
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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fmt.Fprintf(ioutil.Discard, "%s", c)
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}
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}
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func BenchmarkCallPlusSFmt(b *testing.B) {
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c := stack.Caller(0)
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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fmt.Fprintf(ioutil.Discard, "%+s", c)
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}
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}
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func BenchmarkCallSharpSFmt(b *testing.B) {
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c := stack.Caller(0)
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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fmt.Fprintf(ioutil.Discard, "%#s", c)
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}
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}
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func BenchmarkCallDFmt(b *testing.B) {
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c := stack.Caller(0)
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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fmt.Fprintf(ioutil.Discard, "%d", c)
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}
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}
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func BenchmarkCallNFmt(b *testing.B) {
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c := stack.Caller(0)
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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fmt.Fprintf(ioutil.Discard, "%n", c)
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}
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}
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func BenchmarkCallPlusNFmt(b *testing.B) {
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c := stack.Caller(0)
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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fmt.Fprintf(ioutil.Discard, "%+n", c)
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}
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}
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func BenchmarkCaller(b *testing.B) {
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for i := 0; i < b.N; i++ {
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stack.Caller(0)
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}
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}
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func BenchmarkTrace(b *testing.B) {
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for i := 0; i < b.N; i++ {
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stack.Trace()
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}
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}
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func deepStack(depth int, b *testing.B) stack.CallStack {
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if depth > 0 {
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return deepStack(depth-1, b)
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}
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b.StartTimer()
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s := stack.Trace()
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return s
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}
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func BenchmarkTrace10(b *testing.B) {
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for i := 0; i < b.N; i++ {
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b.StopTimer()
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deepStack(10, b)
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}
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}
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func BenchmarkTrace50(b *testing.B) {
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b.StopTimer()
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for i := 0; i < b.N; i++ {
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deepStack(50, b)
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}
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}
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func BenchmarkTrace100(b *testing.B) {
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b.StopTimer()
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for i := 0; i < b.N; i++ {
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deepStack(100, b)
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}
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}
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////////////////
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// Benchmark functions followed by formatting
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////////////////
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func BenchmarkCallerAndVFmt(b *testing.B) {
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for i := 0; i < b.N; i++ {
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fmt.Fprint(ioutil.Discard, stack.Caller(0))
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}
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}
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func BenchmarkTraceAndVFmt(b *testing.B) {
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for i := 0; i < b.N; i++ {
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fmt.Fprint(ioutil.Discard, stack.Trace())
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}
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}
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func BenchmarkTrace10AndVFmt(b *testing.B) {
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for i := 0; i < b.N; i++ {
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b.StopTimer()
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fmt.Fprint(ioutil.Discard, deepStack(10, b))
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}
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}
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////////////////
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// Baseline against package runtime.
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////////////////
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func BenchmarkRuntimeCaller(b *testing.B) {
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for i := 0; i < b.N; i++ {
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runtime.Caller(0)
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}
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}
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func BenchmarkRuntimeCallerAndFmt(b *testing.B) {
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for i := 0; i < b.N; i++ {
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_, file, line, _ := runtime.Caller(0)
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const sep = "/"
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if i := strings.LastIndex(file, sep); i != -1 {
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file = file[i+len(sep):]
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}
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fmt.Fprint(ioutil.Discard, file, ":", line)
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}
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}
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func BenchmarkFuncForPC(b *testing.B) {
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pc, _, _, _ := runtime.Caller(0)
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pc--
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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runtime.FuncForPC(pc)
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}
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}
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func BenchmarkFuncFileLine(b *testing.B) {
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pc, _, _, _ := runtime.Caller(0)
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pc--
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fn := runtime.FuncForPC(pc)
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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fn.FileLine(pc)
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}
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}
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