41 lines
962 B
Go
41 lines
962 B
Go
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// Package testlog creates a *log.Logger backed by testing.T to ease logging in
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// tests.
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package testlog
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import (
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"io"
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"log"
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)
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// Logger is the methods of testing.T (or testing.B) needed by the test
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// logger.
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type Logger interface {
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Logf(format string, args ...interface{})
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}
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// writer implements io.Writer on top of a Logger.
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type writer struct {
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t Logger
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}
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// Write to an underlying Logger. Never returns an error.
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func (w *writer) Write(p []byte) (n int, err error) {
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w.t.Logf(string(p))
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return len(p), nil
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}
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// NewWriter creates a new io.Writer backed by a Logger.
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func NewWriter(t Logger) io.Writer {
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return &writer{t}
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}
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// NewLog returns a new test logger. See https://golang.org/pkg/log/#New
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func NewLog(t Logger, prefix string, flag int) *log.Logger {
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return log.New(&writer{t}, prefix, flag)
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}
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// New logger with "TEST" prefix and the Lmicroseconds flag.
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func New(t Logger) *log.Logger {
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return NewLog(t, "TEST ", log.Lmicroseconds)
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}
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