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// Copyright 2020 New Relic Corporation. All rights reserved.
// SPDX-License-Identifier: Apache-2.0
package internal
import (
"bytes"
"encoding/json"
"strings"
"testing"
"github.com/newrelic/go-agent/internal/stacktracetest"
)
func TestGetStackTrace(t *testing.T) {
stack := GetStackTrace()
js, err := json.Marshal(stack)
if nil != err {
t.Fatal(err)
}
if nil == js {
t.Fatal(string(js))
}
}
func TestLongStackTraceLimitsFrames(t *testing.T) {
st := stacktracetest.CountedCall(maxStackTraceFrames+20, func() []uintptr {
return GetStackTrace()
})
if len(st) != maxStackTraceFrames {
t.Error("Unexpected size of stacktrace", maxStackTraceFrames, len(st))
}
l := len(StackTrace(st).frames())
if l != maxStackTraceFrames {
t.Error("Unexpected number of frames", maxStackTraceFrames, l)
}
}
func TestManyStackTraceFramesLimitsOutput(t *testing.T) {
frames := make([]stacktraceFrame, maxStackTraceFrames+20)
expect := `[
{},{},{},{},{},{},{},{},{},{},
{},{},{},{},{},{},{},{},{},{},
{},{},{},{},{},{},{},{},{},{},
{},{},{},{},{},{},{},{},{},{},
{},{},{},{},{},{},{},{},{},{},
{},{},{},{},{},{},{},{},{},{},
{},{},{},{},{},{},{},{},{},{},
{},{},{},{},{},{},{},{},{},{},
{},{},{},{},{},{},{},{},{},{},
{},{},{},{},{},{},{},{},{},{}
]`
estimate := 256 * len(frames)
output := bytes.NewBuffer(make([]byte, 0, estimate))
writeFrames(output, frames)
if CompactJSONString(expect) != output.String() {
t.Error("Unexpected JSON output", CompactJSONString(expect), output.String())
}
}
func TestStacktraceFrames(t *testing.T) {
// This stacktrace taken from Go 1.11
inputFrames := []stacktraceFrame{
{
File: "/Users/will/Desktop/gopath/src/github.com/newrelic/go-agent/internal/stacktrace.go",
Name: "github.com/newrelic/go-agent/internal.GetStackTrace",
Line: 17,
},
{
File: "/Users/will/Desktop/gopath/src/github.com/newrelic/go-agent/internal_txn.go",
Name: "github.com/newrelic/go-agent.(*txn).NoticeError",
Line: 696,
},
{
File: "\u003cautogenerated\u003e",
Name: "go.(*struct { github.com/newrelic/go-agent.threadWithExtras }).NoticeError",
Line: 1,
},
{
File: "/Users/will/Desktop/gopath/src/github.com/newrelic/go-agent/internal_attributes_test.go",
Name: "github.com/newrelic/go-agent.TestAddAttributeSecurityPolicyDisablesInclude",
Line: 68,
},
{
File: "/Users/will/.gvm/gos/go1.11/src/testing/testing.go",
Name: "testing.tRunner",
Line: 827,
},
{
File: "/Users/will/.gvm/gos/go1.11/src/runtime/asm_amd64.s",
Name: "runtime.goexit",
Line: 1333,
},
}
buf := &bytes.Buffer{}
writeFrames(buf, inputFrames)
expectedJSON := `[
{
"name":"testing.tRunner",
"filepath":"/Users/will/.gvm/gos/go1.11/src/testing/testing.go",
"line":827
},
{
"name":"runtime.goexit",
"filepath":"/Users/will/.gvm/gos/go1.11/src/runtime/asm_amd64.s",
"line":1333
}
]`
testExpectedJSON(t, expectedJSON, buf.String())
}
func TestStackTraceTopFrame(t *testing.T) {
// This test uses a separate package since the stacktrace code removes
// the top stack frames which are in packages "newrelic" and "internal".
stackJSON := stacktracetest.TopStackFrame(func() []byte {
st := GetStackTrace()
js, _ := json.Marshal(st)
return js
})
stack := []struct {
Name string `json:"name"`
FilePath string `json:"filepath"`
Line int `json:"line"`
}{}
if err := json.Unmarshal(stackJSON, &stack); err != nil {
t.Fatal(err)
}
if len(stack) < 2 {
t.Fatal(string(stackJSON))
}
if stack[0].Name != "stacktracetest.TopStackFrame" {
t.Error(string(stackJSON))
}
if stack[0].Line != 9 {
t.Error(string(stackJSON))
}
if !strings.Contains(stack[0].FilePath, "go-agent/internal/stacktracetest/stacktracetest.go") {
t.Error(string(stackJSON))
}
}
func TestFramesCount(t *testing.T) {
st := stacktracetest.CountedCall(3, func() []uintptr {
return GetStackTrace()
})
frames := StackTrace(st).frames()
if len(st) != len(frames) {
t.Error("Invalid # of frames", len(st), len(frames))
}
}
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