github.com/dubbogo/gost@v1.14.0/container/gxsync/semaphore_flaky_test.go (about)

     1  /*
     2  Copyright 2019 The Vitess Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  /*
    18   * Licensed to the Apache Software Foundation (ASF) under one or more
    19   * contributor license agreements.  See the NOTICE file distributed with
    20   * this work for additional information regarding copyright ownership.
    21   * The ASF licenses this file to You under the Apache License, Version 2.0
    22   * (the "License"); you may not use this file except in compliance with
    23   * the License.  You may obtain a copy of the License at
    24   *
    25   *     http://www.apache.org/licenses/LICENSE-2.0
    26   *
    27   * Unless required by applicable law or agreed to in writing, software
    28   * distributed under the License is distributed on an "AS IS" BASIS,
    29   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    30   * See the License for the specific language governing permissions and
    31   * limitations under the License.
    32   */
    33  
    34  package gxsync
    35  
    36  import (
    37  	"testing"
    38  	"time"
    39  )
    40  
    41  func TestSemaNoTimeout(t *testing.T) {
    42  	s := NewSemaphore(1, 0)
    43  	s.Acquire()
    44  	released := false
    45  	go func() {
    46  		time.Sleep(10 * time.Millisecond)
    47  		released = true
    48  		s.Release()
    49  	}()
    50  	s.Acquire()
    51  	if !released {
    52  		t.Errorf("release: false, want true")
    53  	}
    54  }
    55  
    56  func TestSemaTimeout(t *testing.T) {
    57  	s := NewSemaphore(1, 5*time.Millisecond)
    58  	s.Acquire()
    59  	go func() {
    60  		time.Sleep(10 * time.Millisecond)
    61  		s.Release()
    62  	}()
    63  	if s.Acquire() {
    64  		t.Errorf("Acquire: true, want false")
    65  	}
    66  	time.Sleep(10 * time.Millisecond)
    67  	if !s.Acquire() {
    68  		t.Errorf("Acquire: false, want true")
    69  	}
    70  }
    71  
    72  func TestSemaTryAcquire(t *testing.T) {
    73  	s := NewSemaphore(1, 0)
    74  	if !s.TryAcquire() {
    75  		t.Errorf("TryAcquire: false, want true")
    76  	}
    77  	if s.TryAcquire() {
    78  		t.Errorf("TryAcquire: true, want false")
    79  	}
    80  	s.Release()
    81  	if !s.TryAcquire() {
    82  		t.Errorf("TryAcquire: false, want true")
    83  	}
    84  }