open-consul/sdk/testutil/testlog.go

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package testutil
import (
"fmt"
"io"
"io/ioutil"
"log"
"os"
"strings"
"testing"
"github.com/hashicorp/go-hclog"
)
var sendTestLogsToStdout bool
func init() {
sendTestLogsToStdout = os.Getenv("NOLOGBUFFER") == "1"
}
// Deprecated: use Logger(t)
func TestLogger(t testing.TB) *log.Logger {
return log.New(&testWriter{t}, t.Name()+": ", log.LstdFlags)
}
func NewDiscardLogger() hclog.Logger {
return hclog.New(&hclog.LoggerOptions{
Level: 0,
Output: ioutil.Discard,
})
}
func Logger(t testing.TB) hclog.InterceptLogger {
return LoggerWithOutput(t, &testWriter{t})
}
func LoggerWithOutput(t testing.TB, output io.Writer) hclog.InterceptLogger {
return hclog.NewInterceptLogger(&hclog.LoggerOptions{
Name: t.Name(),
Level: hclog.Debug,
Output: output,
})
}
// Deprecated: use LoggerWithName(t)
func TestLoggerWithName(t testing.TB, name string) *log.Logger {
return log.New(&testWriter{t}, "test["+name+"]: ", log.LstdFlags)
}
func LoggerWithName(t testing.TB, name string) hclog.InterceptLogger {
return hclog.NewInterceptLogger(&hclog.LoggerOptions{
Name: "test[" + name + "]",
Level: hclog.Debug,
Output: &testWriter{t},
})
}
func TestWriter(t testing.TB) io.Writer {
return &testWriter{t}
}
type testWriter struct {
t testing.TB
}
func (tw *testWriter) Write(p []byte) (n int, err error) {
if tw.t != nil {
tw.t.Helper()
}
if sendTestLogsToStdout || tw.t == nil {
fmt.Fprint(os.Stdout, strings.TrimSpace(string(p))+"\n")
} else {
defer func() {
if r := recover(); r != nil {
if sr, ok := r.(string); ok {
if strings.HasPrefix(sr, "Log in goroutine after ") {
// These sorts of panics are undesirable, but requires
// total control over goroutine lifetimes to correct.
fmt.Fprint(os.Stdout, "SUPPRESSED PANIC: "+sr+"\n")
return
}
}
panic(r)
}
}()
tw.t.Log(strings.TrimSpace(string(p)))
}
return len(p), nil
}