mirror of
https://github.com/prometheus/prometheus.git
synced 2024-09-19 23:37:31 -07:00
38098f8c95
Prometheus is Apache 2 licensed, and most source files have the appropriate copyright license header, but some were missing it without apparent reason. Correct that by adding it.
81 lines
2.1 KiB
Go
81 lines
2.1 KiB
Go
// Copyright 2016 The Prometheus 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 flock
|
|
|
|
import (
|
|
"os"
|
|
"path/filepath"
|
|
"testing"
|
|
|
|
"github.com/prometheus/prometheus/util/testutil"
|
|
)
|
|
|
|
func TestLocking(t *testing.T) {
|
|
dir := testutil.NewTemporaryDirectory("test_flock", t)
|
|
defer dir.Close()
|
|
|
|
fileName := filepath.Join(dir.Path(), "LOCK")
|
|
|
|
if _, err := os.Stat(fileName); err == nil {
|
|
t.Fatalf("File %q unexpectedly exists.", fileName)
|
|
}
|
|
|
|
lock, existed, err := New(fileName)
|
|
if err != nil {
|
|
t.Fatalf("Error locking file %q: %s", fileName, err)
|
|
}
|
|
if existed {
|
|
t.Errorf("File %q reported as existing during locking.", fileName)
|
|
}
|
|
|
|
// File must now exist.
|
|
if _, err = os.Stat(fileName); err != nil {
|
|
t.Errorf("Could not stat file %q expected to exist: %s", fileName, err)
|
|
}
|
|
|
|
// Try to lock again.
|
|
lockedAgain, existed, err := New(fileName)
|
|
if err == nil {
|
|
t.Fatalf("File %q locked twice.", fileName)
|
|
}
|
|
if lockedAgain != nil {
|
|
t.Error("Unsuccessful locking did not return nil.")
|
|
}
|
|
if !existed {
|
|
t.Errorf("Existing file %q not recognized.", fileName)
|
|
}
|
|
|
|
if err := lock.Release(); err != nil {
|
|
t.Errorf("Error releasing lock for file %q: %s", fileName, err)
|
|
}
|
|
|
|
// File must still exist.
|
|
if _, err = os.Stat(fileName); err != nil {
|
|
t.Errorf("Could not stat file %q expected to exist: %s", fileName, err)
|
|
}
|
|
|
|
// Lock existing file.
|
|
lock, existed, err = New(fileName)
|
|
if err != nil {
|
|
t.Fatalf("Error locking file %q: %s", fileName, err)
|
|
}
|
|
if !existed {
|
|
t.Errorf("Existing file %q not recognized.", fileName)
|
|
}
|
|
|
|
if err := lock.Release(); err != nil {
|
|
t.Errorf("Error releasing lock for file %q: %s", fileName, err)
|
|
}
|
|
}
|