63 lines
1.2 KiB
Go
63 lines
1.2 KiB
Go
package testutil
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import (
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"bytes"
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"io"
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"os"
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"sync"
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"testing"
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"github.com/hashicorp/go-hclog"
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)
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func Logger(t testing.TB) hclog.InterceptLogger {
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return LoggerWithOutput(t, NewLogBuffer(t))
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}
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func LoggerWithOutput(t testing.TB, output io.Writer) hclog.InterceptLogger {
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return hclog.NewInterceptLogger(&hclog.LoggerOptions{
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Name: t.Name(),
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Level: hclog.Trace,
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Output: output,
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})
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}
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var sendTestLogsToStdout = os.Getenv("NOLOGBUFFER") == "1"
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// NewLogBuffer returns an io.Writer which buffers all writes. When the test
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// ends, t.Failed is checked. If the test has failed all log output is printed
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// to stdout.
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//
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// Set the env var NOLOGBUFFER=1 to disable buffering, resulting in all log
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// output being written immediately to stdout.
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func NewLogBuffer(t CleanupT) io.Writer {
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if sendTestLogsToStdout {
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return os.Stdout
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}
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buf := &logBuffer{buf: new(bytes.Buffer)}
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t.Cleanup(func() {
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if t.Failed() {
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buf.Lock()
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defer buf.Unlock()
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buf.buf.WriteTo(os.Stdout)
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}
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})
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return buf
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}
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type CleanupT interface {
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Cleanup(f func())
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Failed() bool
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}
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type logBuffer struct {
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buf *bytes.Buffer
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sync.Mutex
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}
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func (lb *logBuffer) Write(p []byte) (n int, err error) {
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lb.Lock()
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defer lb.Unlock()
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return lb.buf.Write(p)
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}
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