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Testing Decimal Formatting Benchmark Operations in dianping/cat

This test suite evaluates string formatting performance in the Cat monitoring system’s message handling component. The benchmark test focuses on decimal precision formatting and mathematical operations within the logging context.

Test Coverage Overview

The test coverage focuses on string formatting operations with decimal precision handling.

Tests basic decimal division operation (3/7)
Verifies precision formatting to 2 decimal places
Validates String.format functionality

Implementation Analysis

The testing approach employs JUnit’s standard test framework for benchmarking string formatting operations.

The implementation uses Java’s built-in String.format method with floating-point arithmetic, demonstrating:

Double precision conversion
Format specifier usage (%.2f)
Mathematical operation handling

Technical Details

Testing infrastructure includes:

JUnit 4 framework
Java String.format method
System.out for output verification
Basic arithmetic operations

Best Practices Demonstrated

The test demonstrates several quality practices in benchmark testing:

Isolated test method for specific functionality
Clear format specification
Consistent decimal precision handling
Simple and focused test scope

dianping/cat

cat-hadoop/src/test/java/org/unidal/cat/message/BenchmarkTest.java

            
/*
 * Copyright (c) 2011-2018, Meituan Dianping. All Rights Reserved.
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.unidal.cat.message;

import org.junit.Test;

public class BenchmarkTest {
	@Test
	public void test() {
		System.out.println(String.format("%.2f", 1.0 * 3 / 7));
	}
}