package term_test
import (
"bytes"
"io"
"io/ioutil"
"strconv"
"sync"
"testing"
"github.com/go-kit/kit/log"
"github.com/go-kit/kit/log/term"
)
func TestColorLogger(t *testing.T) {
var buf bytes.Buffer
logger := newColorLogger(&buf)
if err := logger.Log("hello", "world"); err != nil {
t.Fatal(err)
}
if want, have := "hello=world\n", buf.String(); want != have {
t.Errorf("\nwant %#v\nhave %#v", want, have)
}
buf.Reset()
if err := logger.Log("a", 1); err != nil {
t.Fatal(err)
}
if want, have := "\x1b[32;1m\x1b[47;1ma=1\n\x1b[39;49;22m", buf.String(); want != have {
t.Errorf("\nwant %#v\nhave %#v", want, have)
}
}
func newColorLogger(w io.Writer) log.Logger {
return term.NewColorLogger(w, log.NewLogfmtLogger,
func(keyvals ...interface{}) term.FgBgColor {
if keyvals[0] == "a" {
return term.FgBgColor{Fg: term.Green, Bg: term.White}
}
return term.FgBgColor{}
})
}
func BenchmarkColorLoggerSimple(b *testing.B) {
benchmarkRunner(b, newColorLogger(ioutil.Discard), baseMessage)
}
func BenchmarkColorLoggerContextual(b *testing.B) {
benchmarkRunner(b, newColorLogger(ioutil.Discard), withMessage)
}
func TestColorLoggerConcurrency(t *testing.T) {
testConcurrency(t, newColorLogger(ioutil.Discard))
}
// copied from log/benchmark_test.go
func benchmarkRunner(b *testing.B, logger log.Logger, f func(log.Logger)) {
lc := log.With(logger, "common_key", "common_value")
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
f(lc)
}
}
var (
baseMessage = func(logger log.Logger) { logger.Log("foo_key", "foo_value") }
withMessage = func(logger log.Logger) { log.With(logger, "a", "b").Log("c", "d") }
)
// copied from log/concurrency_test.go
func testConcurrency(t *testing.T, logger log.Logger) {
for _, n := range []int{10, 100, 500} {
wg := sync.WaitGroup{}
wg.Add(n)
for i := 0; i < n; i++ {
go func() { spam(logger); wg.Done() }()
}
wg.Wait()
}
}
func spam(logger log.Logger) {
for i := 0; i < 100; i++ {
logger.Log("a", strconv.FormatInt(int64(i), 10))
}
}