prometheus/storage/remote/intern_test.go

89 lines
2.7 KiB
Go

// Copyright 2019 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.
//
// Inspired / copied / modified from https://gitlab.com/cznic/strutil/blob/master/strutil.go,
// which is MIT licensed, so:
//
// Copyright (c) 2014 The strutil Authors. All rights reserved.
package remote
import (
"fmt"
"sync/atomic"
"testing"
"time"
"github.com/prometheus/prometheus/util/testutil"
)
func TestIntern(t *testing.T) {
testString := "TestIntern"
interner.intern(testString)
interned, ok := interner.pool[testString]
testutil.Equals(t, ok, true)
testutil.Assert(t, interned.refs == 1, fmt.Sprintf("expected refs to be 1 but it was %d", interned.refs))
}
func TestIntern_MultiRef(t *testing.T) {
testString := "TestIntern_MultiRef"
interner.intern(testString)
interned, ok := interner.pool[testString]
testutil.Equals(t, ok, true)
testutil.Assert(t, interned.refs == 1, fmt.Sprintf("expected refs to be 1 but it was %d", interned.refs))
interner.intern(testString)
interned, ok = interner.pool[testString]
testutil.Equals(t, ok, true)
testutil.Assert(t, interned.refs == 2, fmt.Sprintf("expected refs to be 2 but it was %d", interned.refs))
}
func TestIntern_DeleteRef(t *testing.T) {
testString := "TestIntern_DeleteRef"
interner.intern(testString)
interned, ok := interner.pool[testString]
testutil.Equals(t, ok, true)
testutil.Assert(t, interned.refs == 1, fmt.Sprintf("expected refs to be 1 but it was %d", interned.refs))
interner.release(testString)
_, ok = interner.pool[testString]
testutil.Equals(t, ok, false)
}
func TestIntern_MultiRef_Concurrent(t *testing.T) {
testString := "TestIntern_MultiRef_Concurrent"
interner.intern(testString)
interned, ok := interner.pool[testString]
testutil.Equals(t, ok, true)
testutil.Assert(t, interned.refs == 1, fmt.Sprintf("expected refs to be 1 but it was %d", interned.refs))
go interner.release(testString)
interner.intern(testString)
time.Sleep(time.Millisecond)
interner.mtx.RLock()
interned, ok = interner.pool[testString]
interner.mtx.RUnlock()
testutil.Equals(t, ok, true)
testutil.Assert(t, atomic.LoadInt64(&interned.refs) == 1, fmt.Sprintf("expected refs to be 1 but it was %d", interned.refs))
}