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// Copyright 2017 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package logger
import (
"bytes"
"fmt"
"io"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"reflect"
"sort"
"syscall"
"testing"
)
func TestCreateFileWithRotation(t *testing.T) {
dir, err := ioutil.TempDir("", "test-rotation")
if err != nil {
t.Fatalf("Failed to get TempDir: %v", err)
}
defer os.RemoveAll(dir)
file := filepath.Join(dir, "build.log")
writeFile := func(name string, data string) {
f, err := CreateFileWithRotation(name, 3)
if err != nil {
t.Fatalf("Failed to create file: %v", err)
}
if n, err := io.WriteString(f, data); err == nil && n < len(data) {
t.Fatalf("Short write")
} else if err != nil {
t.Fatalf("Failed to write: %v", err)
}
if err := f.Close(); err != nil {
t.Fatalf("Failed to close: %v", err)
}
}
writeFile(file, "a")
writeFile(file, "b")
writeFile(file, "c")
writeFile(file, "d")
writeFile(file, "e")
d, err := os.Open(dir)
if err != nil {
t.Fatalf("Failed to open dir: %v", err)
}
names, err := d.Readdirnames(0)
if err != nil {
t.Fatalf("Failed to read dir: %v", err)
}
sort.Strings(names)
expected := []string{".lock_build.log", "build.1.log", "build.2.log", "build.3.log", "build.log"}
if !reflect.DeepEqual(names, expected) {
t.Errorf("File list does not match.")
t.Errorf(" got: %v", names)
t.Errorf("expected: %v", expected)
t.FailNow()
}
expectFileContents := func(name, expected string) {
data, err := ioutil.ReadFile(filepath.Join(dir, name))
if err != nil {
t.Errorf("Error reading file: %v", err)
return
}
str := string(data)
if str != expected {
t.Errorf("Contents of %v does not match.", name)
t.Errorf(" got: %v", data)
t.Errorf("expected: %v", expected)
}
}
expectFileContents("build.log", "e")
expectFileContents("build.1.log", "d")
expectFileContents("build.2.log", "c")
expectFileContents("build.3.log", "b")
}
func TestPanic(t *testing.T) {
if os.Getenv("ACTUALLY_PANIC") == "1" {
panicValue := "foo"
log := New(&bytes.Buffer{})
defer func() {
p := recover()
if p == panicValue {
os.Exit(42)
} else {
fmt.Fprintf(os.Stderr, "Expected %q, got %v\n", panicValue, p)
os.Exit(3)
}
}()
defer log.Cleanup()
log.Panic(panicValue)
os.Exit(2)
return
}
// Run this in an external process so that we don't pollute stderr
cmd := exec.Command(os.Args[0], "-test.run=TestPanic")
cmd.Env = append(os.Environ(), "ACTUALLY_PANIC=1")
err := cmd.Run()
if e, ok := err.(*exec.ExitError); ok && e.Sys().(syscall.WaitStatus).ExitStatus() == 42 {
return
}
t.Errorf("Expected process to exit with status 42, got %v", err)
}
func TestFatal(t *testing.T) {
if os.Getenv("ACTUALLY_FATAL") == "1" {
log := New(&bytes.Buffer{})
defer func() {
// Shouldn't get here
os.Exit(3)
}()
defer log.Cleanup()
log.Fatal("Test")
os.Exit(0)
return
}
cmd := exec.Command(os.Args[0], "-test.run=TestFatal")
cmd.Env = append(os.Environ(), "ACTUALLY_FATAL=1")
err := cmd.Run()
if e, ok := err.(*exec.ExitError); ok && e.Sys().(syscall.WaitStatus).ExitStatus() == 1 {
return
}
t.Errorf("Expected process to exit with status 1, got %v", err)
}
func TestNonFatal(t *testing.T) {
if os.Getenv("ACTUAL_TEST") == "1" {
log := New(&bytes.Buffer{})
defer log.Cleanup()
log.Println("Test")
return
}
cmd := exec.Command(os.Args[0], "-test.run=TestNonFatal")
cmd.Env = append(os.Environ(), "ACTUAL_TEST=1")
err := cmd.Run()
if e, ok := err.(*exec.ExitError); ok || (ok && !e.Success()) {
t.Errorf("Expected process to exit cleanly, got %v", err)
}
}
func TestRecoverFatal(t *testing.T) {
log := New(&bytes.Buffer{})
defer func() {
if p := recover(); p != nil {
t.Errorf("Unexpected panic: %#v", p)
}
}()
defer Recover(func(err error) {
if err.Error() != "Test" {
t.Errorf("Expected %q, but got %q", "Test", err.Error())
}
})
log.Fatal("Test")
t.Errorf("Should not get here")
}
func TestRecoverNonFatal(t *testing.T) {
log := New(&bytes.Buffer{})
defer func() {
if p := recover(); p == nil {
t.Errorf("Panic not thrown")
} else if p != "Test" {
t.Errorf("Expected %q, but got %#v", "Test", p)
}
}()
defer Recover(func(err error) {
t.Errorf("Recover function should not be called")
})
log.Panic("Test")
t.Errorf("Should not get here")
}
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