Spring Framework example source code file (MapDataSourceLookupTests.java)

This example Spring Framework source code file (MapDataSourceLookupTests.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

a, data_source_name, datasource, datasourcelookup, exception, exception, hashmap, map, map, mapdatasourcelookup, mapdatasourcelookup, sql, stubdatasource, stubdatasource, testcase, util

The Spring Framework MapDataSourceLookupTests.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.jdbc.datasource.lookup;

import java.util.HashMap;
import java.util.Map;

import javax.sql.DataSource;

import junit.framework.TestCase;

import org.springframework.test.AssertThrows;

/**
 * @author Rick Evans
 */
public final class MapDataSourceLookupTests extends TestCase {

	private static final String DATA_SOURCE_NAME = "dataSource";


	public void testGetDataSourcesReturnsUnmodifiableMap() throws Exception {
		new AssertThrows(UnsupportedOperationException.class, "The Map returned from getDataSources() *must* be unmodifiable") {
			public void test() throws Exception {
				MapDataSourceLookup lookup = new MapDataSourceLookup(new HashMap());
				Map dataSources = lookup.getDataSources();
				dataSources.put("", "");
			}
		}.runTest();
	}

	public void testLookupSunnyDay() throws Exception {
		Map dataSources = new HashMap();
		StubDataSource expectedDataSource = new StubDataSource();
		dataSources.put(DATA_SOURCE_NAME, expectedDataSource);
		MapDataSourceLookup lookup = new MapDataSourceLookup();
		lookup.setDataSources(dataSources);
		DataSource dataSource = lookup.getDataSource(DATA_SOURCE_NAME);
		assertNotNull("A DataSourceLookup implementation must *never* return null from getDataSource(): this one obviously (and incorrectly) is", dataSource);
		assertSame(expectedDataSource, dataSource);
	}

	public void testSettingDataSourceMapToNullIsAnIdempotentOperation() throws Exception {
		Map dataSources = new HashMap();
		StubDataSource expectedDataSource = new StubDataSource();
		dataSources.put(DATA_SOURCE_NAME, expectedDataSource);
		MapDataSourceLookup lookup = new MapDataSourceLookup();
		lookup.setDataSources(dataSources);
		lookup.setDataSources(null); // must be idempotent (i.e. the following lookup must still work);
		DataSource dataSource = lookup.getDataSource(DATA_SOURCE_NAME);
		assertNotNull("A DataSourceLookup implementation must *never* return null from getDataSource(): this one obviously (and incorrectly) is", dataSource);
		assertSame(expectedDataSource, dataSource);
	}

	public void testAddingDataSourcePermitsOverride() throws Exception {
		Map dataSources = new HashMap();
		StubDataSource overridenDataSource = new StubDataSource();
		StubDataSource expectedDataSource = new StubDataSource();
		dataSources.put(DATA_SOURCE_NAME, overridenDataSource);
		MapDataSourceLookup lookup = new MapDataSourceLookup();
		lookup.setDataSources(dataSources);
		lookup.addDataSource(DATA_SOURCE_NAME, expectedDataSource); // must override existing entry
		DataSource dataSource = lookup.getDataSource(DATA_SOURCE_NAME);
		assertNotNull("A DataSourceLookup implementation must *never* return null from getDataSource(): this one obviously (and incorrectly) is", dataSource);
		assertSame(expectedDataSource, dataSource);
	}

	public void testGetDataSourceWhereSuppliedMapHasNonDataSourceTypeUnderSpecifiedKey() throws Exception {
		new AssertThrows(DataSourceLookupFailureException.class) {
			public void test() throws Exception {
				Map dataSources = new HashMap();
				dataSources.put(DATA_SOURCE_NAME, new Object());
				MapDataSourceLookup lookup = new MapDataSourceLookup();
				lookup.setDataSources(dataSources);
				lookup.getDataSource(DATA_SOURCE_NAME);
			}
		}.runTest();
	}

	public void testGetDataSourceWhereSuppliedMapHasNoEntryForSpecifiedKey() throws Exception {
		new AssertThrows(DataSourceLookupFailureException.class) {
			public void test() throws Exception {
				MapDataSourceLookup lookup = new MapDataSourceLookup();
				lookup.getDataSource(DATA_SOURCE_NAME);
			}
		}.runTest();
	}

}