mirror of
https://github.com/tailscale/tailscale.git
synced 2024-11-26 03:25:35 +00:00
93 lines
2.3 KiB
Go
93 lines
2.3 KiB
Go
// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package tstest
|
|
|
|
import (
|
|
"log"
|
|
"os"
|
|
"sync"
|
|
"testing"
|
|
|
|
"tailscale.com/types/logger"
|
|
)
|
|
|
|
type testLogWriter struct {
|
|
t *testing.T
|
|
}
|
|
|
|
func (w *testLogWriter) Write(b []byte) (int, error) {
|
|
w.t.Helper()
|
|
w.t.Logf("%s", b)
|
|
return len(b), nil
|
|
}
|
|
|
|
func FixLogs(t *testing.T) {
|
|
log.SetFlags(log.Ltime | log.Lshortfile)
|
|
log.SetOutput(&testLogWriter{t})
|
|
}
|
|
|
|
func UnfixLogs(t *testing.T) {
|
|
defer log.SetOutput(os.Stderr)
|
|
}
|
|
|
|
type panicLogWriter struct{}
|
|
|
|
func (panicLogWriter) Write(b []byte) (int, error) {
|
|
panic("please use tailscale.com/logger.Logf instead of the log package")
|
|
}
|
|
|
|
// PanicOnLog modifies the standard library log package's default output to
|
|
// an io.Writer that panics, to root out code that's not plumbing their logging
|
|
// through explicit tailscale.com/logger.Logf paths.
|
|
func PanicOnLog() {
|
|
log.SetOutput(panicLogWriter{})
|
|
}
|
|
|
|
// NewLogLineTracker produces a LogLineTracker wrapping a given logf that tracks whether expectedFormatStrings were seen.
|
|
func NewLogLineTracker(logf logger.Logf, expectedFormatStrings []string) *LogLineTracker {
|
|
ret := &LogLineTracker{
|
|
logf: logf,
|
|
listenFor: expectedFormatStrings,
|
|
seen: make(map[string]bool),
|
|
}
|
|
for _, line := range expectedFormatStrings {
|
|
ret.seen[line] = false
|
|
}
|
|
return ret
|
|
}
|
|
|
|
// LogLineTracker is a logger that tracks which log format patterns it's
|
|
// seen and can report which expected ones were not seen later.
|
|
type LogLineTracker struct {
|
|
logf logger.Logf
|
|
listenFor []string
|
|
|
|
mu sync.Mutex
|
|
seen map[string]bool // format string => false (if not yet seen but wanted) or true (once seen)
|
|
}
|
|
|
|
// Logf logs to its underlying logger and also tracks that the given format pattern has been seen.
|
|
func (lt *LogLineTracker) Logf(format string, args ...interface{}) {
|
|
lt.mu.Lock()
|
|
if v, ok := lt.seen[format]; ok && !v {
|
|
lt.seen[format] = true
|
|
}
|
|
lt.mu.Unlock()
|
|
lt.logf(format, args...)
|
|
}
|
|
|
|
// Check returns which format strings haven't been logged yet.
|
|
func (lt *LogLineTracker) Check() []string {
|
|
lt.mu.Lock()
|
|
defer lt.mu.Unlock()
|
|
var notSeen []string
|
|
for _, format := range lt.listenFor {
|
|
if !lt.seen[format] {
|
|
notSeen = append(notSeen, format)
|
|
}
|
|
}
|
|
return notSeen
|
|
}
|