Spring Framework example source code file (CustomCollectionEditorTests.java)

This example Spring Framework source code file (CustomCollectionEditorTests.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Spring Framework tags/keywords

arraylist, arraylist, collection, collectiontypewithnonoargctor, customcollectioneditor, customcollectioneditor, exception, exception, integer, list, list, object, testcase, there, util

The Spring Framework CustomCollectionEditorTests.java source code

/*
 * Copyright 2002-2006 the original author or authors.
 *
 * 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 org.springframework.beans.propertyeditors;

import junit.framework.TestCase;
import org.springframework.test.AssertThrows;

import java.util.ArrayList;
import java.util.List;
import java.util.Collection;

/**
 * Unit tests for the {@link CustomCollectionEditor} class.
 *
 * @author Rick Evans
 */
public final class CustomCollectionEditorTests extends TestCase {

	public void testCtorWithNullCollectionType() throws Exception {
		new AssertThrows(IllegalArgumentException.class) {
			public void test() throws Exception {
				new CustomCollectionEditor(null);
			}
		}.runTest();
	}

	public void testCtorWithNonCollectionType() throws Exception {
		new AssertThrows(IllegalArgumentException.class) {
			public void test() throws Exception {
				new CustomCollectionEditor(String.class);
			}
		}.runTest();
	}

	public void testWithCollectionTypeThatDoesNotExposeAPublicNoArgCtor() throws Exception {
		new AssertThrows(IllegalArgumentException.class) {
			public void test() throws Exception {
				CustomCollectionEditor editor = new CustomCollectionEditor(CollectionTypeWithNoNoArgCtor.class);
				editor.setValue("1");
			}
		}.runTest();
	}

	public void testSunnyDaySetValue() throws Exception {
		CustomCollectionEditor editor = new CustomCollectionEditor(ArrayList.class);
		editor.setValue(new int[] {0, 1, 2});
		Object value = editor.getValue();
		assertNotNull(value);
		assertTrue(value instanceof ArrayList);
		List list = (List) value;
		assertEquals("There must be 3 elements in the converted collection", 3, list.size());
		assertEquals(new Integer(0), list.get(0));
		assertEquals(new Integer(1), list.get(1));
		assertEquals(new Integer(2), list.get(2));
	}

	public void testWhenTargetTypeIsExactlyTheCollectionInterfaceUsesFallbackCollectionType() throws Exception {
		CustomCollectionEditor editor = new CustomCollectionEditor(Collection.class);
		editor.setValue("0, 1, 2");
		Collection value = (Collection) editor.getValue();
		assertNotNull(value);
		assertEquals("There must be 1 element in the converted collection", 1, value.size());
		assertEquals("0, 1, 2", value.iterator().next());
	}

	public void testSunnyDaySetAsTextYieldsSingleValue() throws Exception {
		CustomCollectionEditor editor = new CustomCollectionEditor(ArrayList.class);
		editor.setValue("0, 1, 2");
		Object value = editor.getValue();
		assertNotNull(value);
		assertTrue(value instanceof ArrayList);
		List list = (List) value;
		assertEquals("There must be 1 element in the converted collection", 1, list.size());
		assertEquals("0, 1, 2", list.get(0));
	}


	private static final class CollectionTypeWithNoNoArgCtor extends ArrayList {

		public CollectionTypeWithNoNoArgCtor(String anArg) {
		}
	}

}