89 lines
2.7 KiB
Go
89 lines
2.7 KiB
Go
// Copyright 2019 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// Inspired / copied / modified from https://gitlab.com/cznic/strutil/blob/master/strutil.go,
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// which is MIT licensed, so:
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//
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// Copyright (c) 2014 The strutil Authors. All rights reserved.
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package remote
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import (
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"fmt"
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"sync/atomic"
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"testing"
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"time"
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"github.com/prometheus/prometheus/util/testutil"
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)
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func TestIntern(t *testing.T) {
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testString := "TestIntern"
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interner.intern(testString)
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interned, ok := interner.pool[testString]
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testutil.Equals(t, ok, true)
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testutil.Assert(t, interned.refs == 1, fmt.Sprintf("expected refs to be 1 but it was %d", interned.refs))
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}
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func TestIntern_MultiRef(t *testing.T) {
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testString := "TestIntern_MultiRef"
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interner.intern(testString)
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interned, ok := interner.pool[testString]
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testutil.Equals(t, ok, true)
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testutil.Assert(t, interned.refs == 1, fmt.Sprintf("expected refs to be 1 but it was %d", interned.refs))
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interner.intern(testString)
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interned, ok = interner.pool[testString]
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testutil.Equals(t, ok, true)
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testutil.Assert(t, interned.refs == 2, fmt.Sprintf("expected refs to be 2 but it was %d", interned.refs))
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}
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func TestIntern_DeleteRef(t *testing.T) {
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testString := "TestIntern_DeleteRef"
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interner.intern(testString)
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interned, ok := interner.pool[testString]
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testutil.Equals(t, ok, true)
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testutil.Assert(t, interned.refs == 1, fmt.Sprintf("expected refs to be 1 but it was %d", interned.refs))
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interner.release(testString)
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_, ok = interner.pool[testString]
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testutil.Equals(t, ok, false)
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}
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func TestIntern_MultiRef_Concurrent(t *testing.T) {
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testString := "TestIntern_MultiRef_Concurrent"
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interner.intern(testString)
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interned, ok := interner.pool[testString]
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testutil.Equals(t, ok, true)
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testutil.Assert(t, interned.refs == 1, fmt.Sprintf("expected refs to be 1 but it was %d", interned.refs))
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go interner.release(testString)
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interner.intern(testString)
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time.Sleep(time.Millisecond)
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interner.mtx.RLock()
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interned, ok = interner.pool[testString]
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interner.mtx.RUnlock()
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testutil.Equals(t, ok, true)
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testutil.Assert(t, atomic.LoadInt64(&interned.refs) == 1, fmt.Sprintf("expected refs to be 1 but it was %d", interned.refs))
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}
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