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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package global
import (
"bytes"
"errors"
"io"
"log"
"sync"
"testing"
"github.com/go-logr/logr"
"github.com/stretchr/testify/assert"
"github.com/go-logr/logr/funcr"
"github.com/go-logr/stdr"
)
func TestLoggerConcurrentSafe(t *testing.T) {
var wg sync.WaitGroup
wg.Add(1)
go func() {
defer wg.Done()
SetLogger(stdr.New(log.New(io.Discard, "", 0)))
}()
wg.Add(1)
go func() {
defer wg.Done()
Info("")
}()
wg.Wait()
reset()
}
func TestLogLevel(t *testing.T) {
tests := []struct {
name string
verbosity int
logF func()
want string
}{
{
name: "Verbosity 0 should log errors.",
verbosity: 0,
want: `"msg"="foobar" "error"="foobar"`,
logF: func() {
Error(errors.New("foobar"), "foobar")
},
},
{
name: "Verbosity 1 should log warnings",
verbosity: 1,
want: `"level"=1 "msg"="foo"`,
logF: func() {
Warn("foo")
},
},
{
name: "Verbosity 4 should log info",
verbosity: 4,
want: `"level"=4 "msg"="bar"`,
logF: func() {
Info("bar")
},
},
{
name: "Verbosity 8 should log debug",
verbosity: 8,
want: `"level"=8 "msg"="baz"`,
logF: func() {
Debug("baz")
},
},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
var buf bytes.Buffer
SetLogger(newBuffLogger(&buf, test.verbosity))
test.logF()
assert.Equal(t, test.want, buf.String())
})
}
}
func newBuffLogger(buf *bytes.Buffer, verbosity int) logr.Logger {
return funcr.New(func(prefix, args string) {
_, _ = buf.Write([]byte(args))
}, funcr.Options{
Verbosity: verbosity,
})
}
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