gitee.com/go-spring2/spring-base@v1.1.3/atomic/bool_test.go (about)

     1  /*
     2   * Copyright 2012-2019 the original author or 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   *      https://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  package atomic_test
    18  
    19  import (
    20  	"testing"
    21  	"unsafe"
    22  
    23  	"gitee.com/go-spring2/spring-base/assert"
    24  	"gitee.com/go-spring2/spring-base/atomic"
    25  	"gitee.com/go-spring2/spring-base/json"
    26  )
    27  
    28  func TestBool(t *testing.T) {
    29  
    30  	// atomic.Bool and uint32 occupy the same space
    31  	assert.Equal(t, unsafe.Sizeof(atomic.Bool{}), uintptr(4))
    32  
    33  	var b atomic.Bool
    34  	assert.False(t, b.Load())
    35  
    36  	b.Store(true)
    37  	assert.True(t, b.Load())
    38  
    39  	old := b.Swap(false)
    40  	assert.True(t, old)
    41  	assert.False(t, b.Load())
    42  
    43  	swapped := b.CompareAndSwap(false, true)
    44  	assert.True(t, swapped)
    45  	assert.True(t, b.Load())
    46  
    47  	swapped = b.CompareAndSwap(false, true)
    48  	assert.False(t, swapped)
    49  	assert.True(t, b.Load())
    50  
    51  	bytes, _ := json.Marshal(&b)
    52  	assert.Equal(t, string(bytes), "true")
    53  }