62 lines
1.2 KiB
Go
62 lines
1.2 KiB
Go
/*
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Copyright 2020 VMware, Inc.
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SPDX-License-Identifier: Apache-2.0
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*/
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// Package testlogger implements a logr.Logger suitable for writing test assertions.
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package testlogger
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import (
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"bytes"
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"log"
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"strings"
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"sync"
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"testing"
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"github.com/go-logr/logr"
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"github.com/go-logr/stdr"
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)
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// Logger implements logr.Logger in a way that captures logs for test assertions.
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type Logger struct {
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logr.Logger
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t *testing.T
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buffer syncBuffer
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}
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// New returns a new test Logger.
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func New(t *testing.T) *Logger {
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res := Logger{t: t}
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res.Logger = stdr.New(log.New(&res.buffer, "", 0))
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return &res
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}
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// Lines returns the lines written to the test logger.
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func (l *Logger) Lines() []string {
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l.t.Helper()
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l.buffer.mutex.Lock()
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defer l.buffer.mutex.Unlock()
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// Trim leading/trailing whitespace and omit empty lines.
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var result []string
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for _, line := range strings.Split(l.buffer.buffer.String(), "\n") {
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line = strings.TrimSpace(line)
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if line != "" {
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result = append(result, line)
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}
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}
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return result
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}
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// syncBuffer synchronizes access to a bytes.Buffer.
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type syncBuffer struct {
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mutex sync.Mutex
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buffer bytes.Buffer
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}
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func (s *syncBuffer) Write(p []byte) (n int, err error) {
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s.mutex.Lock()
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defer s.mutex.Unlock()
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return s.buffer.Write(p)
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}
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