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Testing String Splitter Utility Operations in Cat Framework

The SplittersTest suite validates string splitting functionality in the Cat monitoring framework, focusing on handling delimited text with various configurations. This test suite ensures reliable string parsing capabilities essential for the Cat client’s data processing.

Test Coverage Overview

The test coverage focuses on the Splitters utility class functionality for string parsing operations.

Key areas tested include:

String splitting with semicolon delimiter
Empty item filtering
String trimming operations
Multiple consecutive delimiters handling

Implementation Analysis

The testing approach employs JUnit’s assertion framework to validate string splitting behavior. The implementation demonstrates method chaining pattern with the Splitters utility class, allowing flexible configuration of splitting operations through noEmptyItem() and trim() modifiers.

Framework features utilized include:

JUnit @Test annotations
Assert equality checks
Test method isolation

Technical Details

Testing infrastructure includes:

JUnit 4 testing framework
Custom Splitters utility class
Assert class for validations
Java List interface for results verification

Best Practices Demonstrated

The test suite exhibits several testing best practices for utility class validation.

Notable practices include:

Clear test method naming
Single responsibility per test
Explicit expected vs actual result comparison
Multiple assertion scenarios within logical grouping

dianping/cat

cat-client/src/test/java/com/dianping/cat/support/SplittersTest.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 com.dianping.cat.support;

import java.util.List;

import org.junit.Assert;
import org.junit.Test;

public class SplittersTest {
	@Test
	public void testList() {
		String str = "A;B;C;D;E;A;;B;F ";
		List<String> items = Splitters.by(";").noEmptyItem().trim().split(str);
		Assert.assertEquals(8, items.size());

		List<String> emptyItems = Splitters.by(';').trim().split(str);
		Assert.assertEquals(9, emptyItems.size());
	}
}