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Testing YieldingWaitStrategy Implementation in LMAX-Disruptor

This test suite evaluates the YieldingWaitStrategy implementation in the LMAX Disruptor library. It focuses on validating the waiting behavior and timing characteristics of the yielding wait mechanism, which is crucial for high-performance concurrent operations.

Test Coverage Overview

The test coverage focuses on the core waiting functionality of the YieldingWaitStrategy class.

Validates wait timing accuracy with 50ms delay
Tests the yielding behavior during wait operations
Verifies proper thread scheduling interaction

Implementation Analysis

The testing approach employs JUnit Jupiter framework to validate wait strategy behavior. It utilizes a utility method assertWaitForWithDelayOf to verify timing precision and waiting mechanics.

The implementation follows a focused single-responsibility pattern, testing the essential wait functionality in isolation.

Technical Details

Testing Infrastructure:

JUnit Jupiter test framework
Custom WaitStrategyTestUtil support class
YieldingWaitStrategy implementation
50ms delay parameter for timing verification

Best Practices Demonstrated

The test exhibits several quality testing practices including isolation of functionality, precise timing validation, and clear test naming.

Single responsibility principle in test design
Explicit timing parameters
Clear and descriptive test method naming
Proper exception handling

lmax-exchange/disruptor

src/test/java/com/lmax/disruptor/YieldingWaitStrategyTest.java

            
/*
 * Copyright 2012 LMAX Ltd.
 *
 * 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.
 */
package com.lmax.disruptor;

import org.junit.jupiter.api.Test;

import static com.lmax.disruptor.support.WaitStrategyTestUtil.assertWaitForWithDelayOf;

public class YieldingWaitStrategyTest
{

    @Test
    public void shouldWaitForValue() throws Exception
    {
        assertWaitForWithDelayOf(50, new YieldingWaitStrategy());
    }
}