public void TestGet_Concurrency2() {
//模拟已加载缓存
_mockCacheProvider.Get<Test3>( _cacheKey ).Returns( _testA );
//模拟缓存过期标记已到期
_mockCacheProvider.Get<string>( _signKey ).Returns( "" );
//添加缓存过期标记后，返回"a"
_mockCacheProvider.When( t => t.Add( _signKey, "a", 10 ) )
.Do( invocation => _mockCacheProvider.Get<string>( _signKey ).Returns( "a" ) );
//并发读取缓存
UnitTest.TestConcurrency( () => {
var manager = new DefaultCacheManager( _mockCacheProvider, new DefaultCacheKey() );
manager.Get( _key, () => _mockRepository.GetTest3(), 10 );
}, 5 );
//验证添加缓存过期标记1次
_mockCacheProvider.Received(1).Add( _signKey, "a", 10 );
//验证不会调用添加缓存
_mockCacheProvider.DidNotReceive().Add( _cacheKey, _testA, 20 );
//验证缓存在过期时被更新
_mockCacheProvider.Received( 1 ).Update( _cacheKey, Arg.Any<object>(), 20 );
}
public void TestGet_Concurrency() {
//设置仓储操作
_mockRepository.GetTest3().Returns( _testA );
//设置仅当调用了添加缓存方法后，才能获取
_mockCacheProvider.When( t => t.Add( _cacheKey, _testA, 20 ) )
.Do( invocation => _mockCacheProvider.Get<Test3>( _cacheKey ).Returns( _testA ) );
_mockCacheProvider.When( t => t.Add( _signKey, "a", 10 ) )
.Do( invocation => _mockCacheProvider.Get<string>( _signKey ).Returns( "a" ) );
//并发读取缓存
UnitTest.TestConcurrency( () => {
var manager = new DefaultCacheManager( _mockCacheProvider, new DefaultCacheKey() );
manager.Get( _key, () => _mockRepository.GetTest3(), 10 );
}, 5 );
//验证仓储只被调用一次，说明同时只有一个线程能更新缓存
_mockRepository.Received( 1 ).GetTest3();
//验证缓存只被添加一次
_mockCacheProvider.Received( 1 ).Add( _cacheKey, _testA, 20 );
}