1 files changed, 582 insertions, 0 deletions
diff --git a/vendor/github.com/go-stack/stack/stack_test.go b/vendor/github.com/go-stack/stack/stack_test.go
new file mode 100644
index 0000000..44f3a7d
--- /dev/null
+++ b/vendor/github.com/go-stack/stack/stack_test.go
@@ -0,0 +1,582 @@
+package stack_test
+
+import (
+	"fmt"
+	"io/ioutil"
+	"path"
+	"path/filepath"
+	"reflect"
+	"runtime"
+	"strings"
+	"testing"
+
+	"github.com/go-stack/stack"
+)
+
+func TestCaller(t *testing.T) {
+	t.Parallel()
+
+	c := stack.Caller(0)
+	_, file, line, ok := runtime.Caller(0)
+	line--
+	if !ok {
+		t.Fatal("runtime.Caller(0) failed")
+	}
+
+	if got, want := c.Frame().File, file; got != want {
+		t.Errorf("got file == %v, want file == %v", got, want)
+	}
+
+	if got, want := c.Frame().Line, line; got != want {
+		t.Errorf("got line == %v, want line == %v", got, want)
+	}
+}
+
+func f3(f1 func() stack.Call) stack.Call {
+	return f2(f1)
+}
+
+func f2(f1 func() stack.Call) stack.Call {
+	return f1()
+}
+
+func TestCallerMidstackInlined(t *testing.T) {
+	t.Parallel()
+
+	_, _, line, ok := runtime.Caller(0)
+	line -= 10 // adjust to return f1() line inside f2()
+	if !ok {
+		t.Fatal("runtime.Caller(0) failed")
+	}
+
+	c := f3(func() stack.Call {
+		return stack.Caller(2)
+	})
+
+	if got, want := c.Frame().Line, line; got != want {
+		t.Errorf("got line == %v, want line == %v", got, want)
+	}
+	if got, want := c.Frame().Function, "github.com/go-stack/stack_test.f3"; got != want {
+		t.Errorf("got func name == %v, want func name == %v", got, want)
+	}
+}
+
+func TestCallerPanic(t *testing.T) {
+	t.Parallel()
+
+	var (
+		line int
+		ok   bool
+	)
+
+	defer func() {
+		if recover() != nil {
+			var pcs [32]uintptr
+			n := runtime.Callers(1, pcs[:])
+			frames := runtime.CallersFrames(pcs[:n])
+			// count frames to runtime.sigpanic
+			panicIdx := 0
+			for {
+				f, more := frames.Next()
+				if f.Function == "runtime.sigpanic" {
+					break
+				}
+				panicIdx++
+				if !more {
+					t.Fatal("no runtime.sigpanic entry on the stack")
+				}
+			}
+			c := stack.Caller(panicIdx)
+			if got, want := c.Frame().Function, "runtime.sigpanic"; got != want {
+				t.Errorf("sigpanic frame: got name == %v, want name == %v", got, want)
+			}
+			c1 := stack.Caller(panicIdx + 1)
+			if got, want := c1.Frame().Function, "github.com/go-stack/stack_test.TestCallerPanic"; got != want {
+				t.Errorf("TestCallerPanic frame: got name == %v, want name == %v", got, want)
+			}
+			if got, want := c1.Frame().Line, line; got != want {
+				t.Errorf("TestCallerPanic frame: got line == %v, want line == %v", got, want)
+			}
+		}
+	}()
+
+	_, _, line, ok = runtime.Caller(0)
+	line += 7 // adjust to match line of panic below
+	if !ok {
+		t.Fatal("runtime.Caller(0) failed")
+	}
+	// Initiate a sigpanic.
+	var x *uintptr
+	_ = *x
+}
+
+type tholder struct {
+	trace func() stack.CallStack
+}
+
+func (th *tholder) traceLabyrinth() stack.CallStack {
+	for {
+		return th.trace()
+	}
+}
+
+func TestTrace(t *testing.T) {
+	t.Parallel()
+
+	_, _, line, ok := runtime.Caller(0)
+	if !ok {
+		t.Fatal("runtime.Caller(0) failed")
+	}
+
+	fh := tholder{
+		trace: func() stack.CallStack {
+			cs := stack.Trace()
+			return cs
+		},
+	}
+
+	cs := fh.traceLabyrinth()
+
+	lines := []int{line + 7, line - 7, line + 12}
+
+	for i, line := range lines {
+		if got, want := cs[i].Frame().Line, line; got != want {
+			t.Errorf("got line[%d] == %v, want line[%d] == %v", i, got, i, want)
+		}
+	}
+}
+
+// Test stack handling originating from a sigpanic.
+func TestTracePanic(t *testing.T) {
+	t.Parallel()
+
+	var (
+		line int
+		ok   bool
+	)
+
+	defer func() {
+		if recover() != nil {
+			trace := stack.Trace()
+
+			// find runtime.sigpanic
+			panicIdx := -1
+			for i, c := range trace {
+				if c.Frame().Function == "runtime.sigpanic" {
+					panicIdx = i
+					break
+				}
+			}
+			if panicIdx == -1 {
+				t.Fatal("no runtime.sigpanic entry on the stack")
+			}
+			if got, want := trace[panicIdx].Frame().Function, "runtime.sigpanic"; got != want {
+				t.Errorf("sigpanic frame: got name == %v, want name == %v", got, want)
+			}
+			if got, want := trace[panicIdx+1].Frame().Function, "github.com/go-stack/stack_test.TestTracePanic"; got != want {
+				t.Errorf("TestTracePanic frame: got name == %v, want name == %v", got, want)
+			}
+			if got, want := trace[panicIdx+1].Frame().Line, line; got != want {
+				t.Errorf("TestTracePanic frame: got line == %v, want line == %v", got, want)
+			}
+		}
+	}()
+
+	_, _, line, ok = runtime.Caller(0)
+	line += 7 // adjust to match line of panic below
+	if !ok {
+		t.Fatal("runtime.Caller(0) failed")
+	}
+	// Initiate a sigpanic.
+	var x *uintptr
+	_ = *x
+}
+
+const importPath = "github.com/go-stack/stack"
+
+type testType struct{}
+
+func (tt testType) testMethod() (c stack.Call, file string, line int, ok bool) {
+	c = stack.Caller(0)
+	_, file, line, ok = runtime.Caller(0)
+	line--
+	return
+}
+
+func TestCallFormat(t *testing.T) {
+	t.Parallel()
+
+	c := stack.Caller(0)
+	_, file, line, ok := runtime.Caller(0)
+	line--
+	if !ok {
+		t.Fatal("runtime.Caller(0) failed")
+	}
+	relFile := path.Join(importPath, filepath.Base(file))
+
+	c2, file2, line2, ok2 := testType{}.testMethod()
+	if !ok2 {
+		t.Fatal("runtime.Caller(0) failed")
+	}
+	relFile2 := path.Join(importPath, filepath.Base(file2))
+
+	data := []struct {
+		c    stack.Call
+		desc string
+		fmt  string
+		out  string
+	}{
+		{stack.Call{}, "error", "%s", "%!s(NOFUNC)"},
+
+		{c, "func", "%s", path.Base(file)},
+		{c, "func", "%+s", relFile},
+		{c, "func", "%#s", file},
+		{c, "func", "%d", fmt.Sprint(line)},
+		{c, "func", "%n", "TestCallFormat"},
+		{c, "func", "%+n", "github.com/go-stack/stack_test.TestCallFormat"},
+		{c, "func", "%k", "stack_test"},
+		{c, "func", "%+k", "github.com/go-stack/stack_test"},
+		{c, "func", "%v", fmt.Sprint(path.Base(file), ":", line)},
+		{c, "func", "%+v", fmt.Sprint(relFile, ":", line)},
+		{c, "func", "%#v", fmt.Sprint(file, ":", line)},
+
+		{c2, "meth", "%s", path.Base(file2)},
+		{c2, "meth", "%+s", relFile2},
+		{c2, "meth", "%#s", file2},
+		{c2, "meth", "%d", fmt.Sprint(line2)},
+		{c2, "meth", "%n", "testType.testMethod"},
+		{c2, "meth", "%+n", "github.com/go-stack/stack_test.testType.testMethod"},
+		{c2, "meth", "%k", "stack_test"},
+		{c2, "meth", "%+k", "github.com/go-stack/stack_test"},
+		{c2, "meth", "%v", fmt.Sprint(path.Base(file2), ":", line2)},
+		{c2, "meth", "%+v", fmt.Sprint(relFile2, ":", line2)},
+		{c2, "meth", "%#v", fmt.Sprint(file2, ":", line2)},
+	}
+
+	for _, d := range data {
+		got := fmt.Sprintf(d.fmt, d.c)
+		if got != d.out {
+			t.Errorf("fmt.Sprintf(%q, Call(%s)) = %s, want %s", d.fmt, d.desc, got, d.out)
+		}
+	}
+}
+
+func TestCallString(t *testing.T) {
+	t.Parallel()
+
+	c := stack.Caller(0)
+	_, file, line, ok := runtime.Caller(0)
+	line--
+	if !ok {
+		t.Fatal("runtime.Caller(0) failed")
+	}
+
+	c2, file2, line2, ok2 := testType{}.testMethod()
+	if !ok2 {
+		t.Fatal("runtime.Caller(0) failed")
+	}
+
+	data := []struct {
+		c    stack.Call
+		desc string
+		out  string
+	}{
+		{stack.Call{}, "error", "%!v(NOFUNC)"},
+		{c, "func", fmt.Sprint(path.Base(file), ":", line)},
+		{c2, "meth", fmt.Sprint(path.Base(file2), ":", line2)},
+	}
+
+	for _, d := range data {
+		got := d.c.String()
+		if got != d.out {
+			t.Errorf("got %s, want %s", got, d.out)
+		}
+	}
+}
+
+func TestCallMarshalText(t *testing.T) {
+	t.Parallel()
+
+	c := stack.Caller(0)
+	_, file, line, ok := runtime.Caller(0)
+	line--
+	if !ok {
+		t.Fatal("runtime.Caller(0) failed")
+	}
+
+	c2, file2, line2, ok2 := testType{}.testMethod()
+	if !ok2 {
+		t.Fatal("runtime.Caller(0) failed")
+	}
+
+	data := []struct {
+		c    stack.Call
+		desc string
+		out  []byte
+		err  error
+	}{
+		{stack.Call{}, "error", nil, stack.ErrNoFunc},
+		{c, "func", []byte(fmt.Sprint(path.Base(file), ":", line)), nil},
+		{c2, "meth", []byte(fmt.Sprint(path.Base(file2), ":", line2)), nil},
+	}
+
+	for _, d := range data {
+		text, err := d.c.MarshalText()
+		if got, want := err, d.err; got != want {
+			t.Errorf("%s: got err %v, want err %v", d.desc, got, want)
+		}
+		if got, want := text, d.out; !reflect.DeepEqual(got, want) {
+			t.Errorf("%s: got %s, want %s", d.desc, got, want)
+		}
+	}
+}
+
+func TestCallStackString(t *testing.T) {
+	cs, line0 := getTrace(t)
+	_, file, line1, ok := runtime.Caller(0)
+	line1--
+	if !ok {
+		t.Fatal("runtime.Caller(0) failed")
+	}
+	file = path.Base(file)
+	if got, want := cs.String(), fmt.Sprintf("[%s:%d %s:%d]", file, line0, file, line1); got != want {
+		t.Errorf("\n got %v\nwant %v", got, want)
+	}
+}
+
+func TestCallStackMarshalText(t *testing.T) {
+	cs, line0 := getTrace(t)
+	_, file, line1, ok := runtime.Caller(0)
+	line1--
+	if !ok {
+		t.Fatal("runtime.Caller(0) failed")
+	}
+	file = path.Base(file)
+	text, _ := cs.MarshalText()
+	if got, want := text, []byte(fmt.Sprintf("[%s:%d %s:%d]", file, line0, file, line1)); !reflect.DeepEqual(got, want) {
+		t.Errorf("\n got %v\nwant %v", got, want)
+	}
+}
+
+func getTrace(t *testing.T) (stack.CallStack, int) {
+	cs := stack.Trace().TrimRuntime()
+	_, _, line, ok := runtime.Caller(0)
+	line--
+	if !ok {
+		t.Fatal("runtime.Caller(0) failed")
+	}
+	return cs, line
+}
+
+func TestTrimAbove(t *testing.T) {
+	trace := trimAbove()
+	if got, want := len(trace), 2; got != want {
+		t.Fatalf("got len(trace) == %v, want %v, trace: %n", got, want, trace)
+	}
+	if got, want := fmt.Sprintf("%n", trace[1]), "TestTrimAbove"; got != want {
+		t.Errorf("got %q, want %q", got, want)
+	}
+}
+
+func trimAbove() stack.CallStack {
+	call := stack.Caller(1)
+	trace := stack.Trace()
+	return trace.TrimAbove(call)
+}
+
+func TestTrimBelow(t *testing.T) {
+	trace := trimBelow()
+	if got, want := fmt.Sprintf("%n", trace[0]), "TestTrimBelow"; got != want {
+		t.Errorf("got %q, want %q", got, want)
+	}
+}
+
+func trimBelow() stack.CallStack {
+	call := stack.Caller(1)
+	trace := stack.Trace()
+	return trace.TrimBelow(call)
+}
+
+func TestTrimRuntime(t *testing.T) {
+	trace := stack.Trace().TrimRuntime()
+	if got, want := len(trace), 1; got != want {
+		t.Errorf("got len(trace) == %v, want %v, goroot: %q, trace: %#v", got, want, runtime.GOROOT(), trace)
+	}
+}
+
+func BenchmarkCallVFmt(b *testing.B) {
+	c := stack.Caller(0)
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		fmt.Fprint(ioutil.Discard, c)
+	}
+}
+
+func BenchmarkCallPlusVFmt(b *testing.B) {
+	c := stack.Caller(0)
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		fmt.Fprintf(ioutil.Discard, "%+v", c)
+	}
+}
+
+func BenchmarkCallSharpVFmt(b *testing.B) {
+	c := stack.Caller(0)
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		fmt.Fprintf(ioutil.Discard, "%#v", c)
+	}
+}
+
+func BenchmarkCallSFmt(b *testing.B) {
+	c := stack.Caller(0)
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		fmt.Fprintf(ioutil.Discard, "%s", c)
+	}
+}
+
+func BenchmarkCallPlusSFmt(b *testing.B) {
+	c := stack.Caller(0)
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		fmt.Fprintf(ioutil.Discard, "%+s", c)
+	}
+}
+
+func BenchmarkCallSharpSFmt(b *testing.B) {
+	c := stack.Caller(0)
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		fmt.Fprintf(ioutil.Discard, "%#s", c)
+	}
+}
+
+func BenchmarkCallDFmt(b *testing.B) {
+	c := stack.Caller(0)
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		fmt.Fprintf(ioutil.Discard, "%d", c)
+	}
+}
+
+func BenchmarkCallNFmt(b *testing.B) {
+	c := stack.Caller(0)
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		fmt.Fprintf(ioutil.Discard, "%n", c)
+	}
+}
+
+func BenchmarkCallPlusNFmt(b *testing.B) {
+	c := stack.Caller(0)
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		fmt.Fprintf(ioutil.Discard, "%+n", c)
+	}
+}
+
+func BenchmarkCaller(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		stack.Caller(0)
+	}
+}
+
+func BenchmarkTrace(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		stack.Trace()
+	}
+}
+
+func deepStack(depth int, b *testing.B) stack.CallStack {
+	if depth > 0 {
+		return deepStack(depth-1, b)
+	}
+	b.StartTimer()
+	s := stack.Trace()
+	return s
+}
+
+func BenchmarkTrace10(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		b.StopTimer()
+		deepStack(10, b)
+	}
+}
+
+func BenchmarkTrace50(b *testing.B) {
+	b.StopTimer()
+	for i := 0; i < b.N; i++ {
+		deepStack(50, b)
+	}
+}
+
+func BenchmarkTrace100(b *testing.B) {
+	b.StopTimer()
+	for i := 0; i < b.N; i++ {
+		deepStack(100, b)
+	}
+}
+
+////////////////
+// Benchmark functions followed by formatting
+////////////////
+
+func BenchmarkCallerAndVFmt(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		fmt.Fprint(ioutil.Discard, stack.Caller(0))
+	}
+}
+
+func BenchmarkTraceAndVFmt(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		fmt.Fprint(ioutil.Discard, stack.Trace())
+	}
+}
+
+func BenchmarkTrace10AndVFmt(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		b.StopTimer()
+		fmt.Fprint(ioutil.Discard, deepStack(10, b))
+	}
+}
+
+////////////////
+// Baseline against package runtime.
+////////////////
+
+func BenchmarkRuntimeCaller(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		runtime.Caller(0)
+	}
+}
+
+func BenchmarkRuntimeCallerAndFmt(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		_, file, line, _ := runtime.Caller(0)
+		const sep = "/"
+		if i := strings.LastIndex(file, sep); i != -1 {
+			file = file[i+len(sep):]
+		}
+		fmt.Fprint(ioutil.Discard, file, ":", line)
+	}
+}
+
+func BenchmarkFuncForPC(b *testing.B) {
+	pc, _, _, _ := runtime.Caller(0)
+	pc--
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		runtime.FuncForPC(pc)
+	}
+}
+
+func BenchmarkFuncFileLine(b *testing.B) {
+	pc, _, _, _ := runtime.Caller(0)
+	pc--
+	fn := runtime.FuncForPC(pc)
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		fn.FileLine(pc)
+	}
+}