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logger.go
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logger.go
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/**
* Copyright 2021 Google LLC
*
* 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 utils
import (
"fmt"
"io"
"os"
"testing"
"github.com/gruntwork-io/terratest/modules/logger"
terraTesting "github.com/gruntwork-io/terratest/modules/testing"
)
// GetLoggerFromT returns a logger based on test verbosity
func GetLoggerFromT() *logger.Logger {
if testing.Verbose() {
return logger.Default
}
return logger.Discard
}
// TestFileLogger is a logger that writes to disk instead of stdout.
// This is useful when you want to redirect verbose logs of long running tests to disk.
type TestFileLogger struct {
pth string
w io.WriteCloser
}
// NewTestFileLogger returns a TestFileLogger logger that can be used with the WithLogger option.
func NewTestFileLogger(t *testing.T, pth string) (*logger.Logger, func(t *testing.T)) {
f, err := os.OpenFile(pth, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
t.Fatalf("error opening file %s: %v", pth, err)
}
fl := TestFileLogger{
pth: pth,
w: f,
}
return logger.New(fl), fl.Close
}
func (fl TestFileLogger) Logf(t terraTesting.TestingT, format string, args ...interface{}) {
logger.DoLog(t, 3, fl.w, fmt.Sprintf(format, args...))
}
func (fl TestFileLogger) Close(t *testing.T) {
if err := fl.w.Close(); err != nil {
t.Fatalf("error closing file logger %s: %v", fl.pth, err)
}
}