dataaccessutilstests.java

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/*
 * Copyright 2002-2005 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.dao;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.HashSet;

import junit.framework.TestCase;

import org.springframework.dao.support.DataAccessUtils;

/**
 * @author Juergen Hoeller
 * @since 20.10.2004
 */
public class DataAccessUtilsTests extends TestCase {

	public void testWithEmptyCollection() {
		Collection col = new HashSet();

		assertNull(DataAccessUtils.uniqueResult(col));

		try {
			DataAccessUtils.requiredUniqueResult(col);
			fail("Should have thrown IncorrectResultSizeDataAccessException");
		}
		catch (IncorrectResultSizeDataAccessException ex) {
			// expected
			assertEquals(1, ex.getExpectedSize());
			assertEquals(0, ex.getActualSize());
		}

		try {
			DataAccessUtils.objectResult(col, String.class);
			fail("Should have thrown IncorrectResultSizeDataAccessException");
		}
		catch (IncorrectResultSizeDataAccessException ex) {
			// expected
			assertEquals(1, ex.getExpectedSize());
			assertEquals(0, ex.getActualSize());
		}

		try {
			DataAccessUtils.intResult(col);
			fail("Should have thrown IncorrectResultSizeDataAccessException");
		}
		catch (IncorrectResultSizeDataAccessException ex) {
			// expected
			assertEquals(1, ex.getExpectedSize());
			assertEquals(0, ex.getActualSize());
		}

		try {
			DataAccessUtils.longResult(col);
			fail("Should have thrown IncorrectResultSizeDataAccessException");
		}
		catch (IncorrectResultSizeDataAccessException ex) {
			// expected
			assertEquals(1, ex.getExpectedSize());
			assertEquals(0, ex.getActualSize());
		}
	}

	public void testWithTooLargeCollection() {
		Collection col = new HashSet();
		col.add("test1");
		col.add("test2");

		try {
			DataAccessUtils.uniqueResult(col);
			fail("Should have thrown IncorrectResultSizeDataAccessException");
		}
		catch (IncorrectResultSizeDataAccessException ex) {
			// expected
			assertEquals(1, ex.getExpectedSize());
			assertEquals(2, ex.getActualSize());
		}

		try {
			DataAccessUtils.requiredUniqueResult(col);
			fail("Should have thrown IncorrectResultSizeDataAccessException");
		}
		catch (IncorrectResultSizeDataAccessException ex) {
			// expected
			assertEquals(1, ex.getExpectedSize());
			assertEquals(2, ex.getActualSize());
		}

		try {
			DataAccessUtils.objectResult(col, String.class);
			fail("Should have thrown IncorrectResultSizeDataAccessException");
		}
		catch (IncorrectResultSizeDataAccessException ex) {
			// expected
			assertEquals(1, ex.getExpectedSize());
			assertEquals(2, ex.getActualSize());
		}

		try {
			DataAccessUtils.intResult(col);
			fail("Should have thrown IncorrectResultSizeDataAccessException");
		}
		catch (IncorrectResultSizeDataAccessException ex) {
			// expected
			assertEquals(1, ex.getExpectedSize());
			assertEquals(2, ex.getActualSize());
		}

		try {
			DataAccessUtils.longResult(col);
			fail("Should have thrown IncorrectResultSizeDataAccessException");
		}
		catch (IncorrectResultSizeDataAccessException ex) {
			// expected
			assertEquals(1, ex.getExpectedSize());
			assertEquals(2, ex.getActualSize());
		}
	}

	public void testWithInteger() {
		Collection col = new HashSet();
		col.add(new Integer(5));

		assertEquals(new Integer(5), DataAccessUtils.uniqueResult(col));
		assertEquals(new Integer(5), DataAccessUtils.requiredUniqueResult(col));
		assertEquals(new Integer(5), DataAccessUtils.objectResult(col, Integer.class));
		assertEquals("5", DataAccessUtils.objectResult(col, String.class));
		assertEquals(5, DataAccessUtils.intResult(col));
		assertEquals(5, DataAccessUtils.longResult(col));
	}

	public void testWithSameIntegerInstanceTwice() {
		Integer i = new Integer(5);
		Collection col = new ArrayList();
		col.add(i);
		col.add(i);

		assertEquals(new Integer(5), DataAccessUtils.uniqueResult(col));
		assertEquals(new Integer(5), DataAccessUtils.requiredUniqueResult(col));
		assertEquals(new Integer(5), DataAccessUtils.objectResult(col, Integer.class));
		assertEquals("5", DataAccessUtils.objectResult(col, String.class));
		assertEquals(5, DataAccessUtils.intResult(col));
		assertEquals(5, DataAccessUtils.longResult(col));
	}

	public void testWithEquivalentIntegerInstanceTwice() {
		Collection col = new ArrayList();
		col.add(new Integer(5));
		col.add(new Integer(5));

		try {
			DataAccessUtils.uniqueResult(col);
			fail("Should have thrown IncorrectResultSizeDataAccessException");
		}
		catch (IncorrectResultSizeDataAccessException ex) {
			// expected
			assertEquals(1, ex.getExpectedSize());
			assertEquals(2, ex.getActualSize());
		}
	}

	public void testWithLong() {
		Collection col = new HashSet();
		col.add(new Long(5));

		assertEquals(new Long(5), DataAccessUtils.uniqueResult(col));
		assertEquals(new Long(5), DataAccessUtils.requiredUniqueResult(col));
		assertEquals(new Long(5), DataAccessUtils.objectResult(col, Long.class));
		assertEquals("5", DataAccessUtils.objectResult(col, String.class));
		assertEquals(5, DataAccessUtils.intResult(col));
		assertEquals(5, DataAccessUtils.longResult(col));
	}

	public void testWithString() {
		Collection col = new HashSet();
		col.add("test1");

		assertEquals("test1", DataAccessUtils.uniqueResult(col));
		assertEquals("test1", DataAccessUtils.requiredUniqueResult(col));
		assertEquals("test1", DataAccessUtils.objectResult(col, String.class));

		try {
			DataAccessUtils.intResult(col);
			fail("Should have thrown TypeMismatchDataAccessException");
		}
		catch (TypeMismatchDataAccessException ex) {
			// expected
		}

		try {
			DataAccessUtils.longResult(col);
			fail("Should have thrown TypeMismatchDataAccessException");
		}
		catch (TypeMismatchDataAccessException ex) {
			// expected
		}
	}

	public void testWithDate() {
		Date date = new Date();
		Collection col = new HashSet();
		col.add(date);

		assertEquals(date, DataAccessUtils.uniqueResult(col));
		assertEquals(date, DataAccessUtils.requiredUniqueResult(col));
		assertEquals(date, DataAccessUtils.objectResult(col, Date.class));
		assertEquals(date.toString(), DataAccessUtils.objectResult(col, String.class));

		try {
			DataAccessUtils.intResult(col);
			fail("Should have thrown TypeMismatchDataAccessException");
		}
		catch (TypeMismatchDataAccessException ex) {
			// expected
		}

		try {
			DataAccessUtils.longResult(col);
			fail("Should have thrown TypeMismatchDataAccessException");
		}
		catch (TypeMismatchDataAccessException ex) {
			// expected
		}
	}

}