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// Copyright (c) 2016 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package zap
import (
"bytes"
"strings"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestTakeStacktrace(t *testing.T) {
trace := takeStacktrace(0)
lines := strings.Split(trace, "\n")
require.NotEmpty(t, lines, "Expected stacktrace to have at least one frame.")
assert.Contains(
t,
lines[0],
"go.uber.org/zap.TestTakeStacktrace",
"Expected stacktrace to start with the test.",
)
}
func TestTakeStacktraceWithSkip(t *testing.T) {
trace := takeStacktrace(1)
lines := strings.Split(trace, "\n")
require.NotEmpty(t, lines, "Expected stacktrace to have at least one frame.")
assert.Contains(
t,
lines[0],
"testing.",
"Expected stacktrace to start with the test runner (skipping our own frame).",
)
}
func TestTakeStacktraceWithSkipInnerFunc(t *testing.T) {
var trace string
func() {
trace = takeStacktrace(2)
}()
lines := strings.Split(trace, "\n")
require.NotEmpty(t, lines, "Expected stacktrace to have at least one frame.")
assert.Contains(
t,
lines[0],
"testing.",
"Expected stacktrace to start with the test function (skipping the test function).",
)
}
func TestTakeStacktraceDeepStack(t *testing.T) {
const (
N = 500
withStackDepthName = "go.uber.org/zap.withStackDepth"
)
withStackDepth(N, func() {
trace := takeStacktrace(0)
for found := 0; found < N; found++ {
i := strings.Index(trace, withStackDepthName)
if i < 0 {
t.Fatalf(`expected %v occurrences of %q, found %d`,
N, withStackDepthName, found)
}
trace = trace[i+len(withStackDepthName):]
}
})
}
func BenchmarkTakeStacktrace(b *testing.B) {
for i := 0; i < b.N; i++ {
takeStacktrace(0)
}
}
func withStackDepth(depth int, f func()) {
var recurse func(rune) rune
recurse = func(r rune) rune {
if r > 0 {
bytes.Map(recurse, []byte(string([]rune{r - 1})))
} else {
f()
}
return 0
}
recurse(rune(depth))
}
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