tests/org.eclipse.jface.tests.databinding/src/org/eclipse/core/tests/databinding/conversion/StringToNumberConverterTest.java - platform/eclipse.platform.ui - Git at Google

 /*******************************************************************************
  * Copyright (c) 2007, 2009 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *     Matt Carter - Bug 180392
  ******************************************************************************/

 package org.eclipse.core.tests.databinding.conversion;

 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.fail;

 import java.lang.reflect.Constructor;
 import java.math.BigDecimal;
 import java.math.BigInteger;

 import org.eclipse.core.databinding.conversion.StringToNumberConverter;
 import org.junit.Before;
 import org.junit.Test;

 import com.ibm.icu.text.NumberFormat;

 /**
  * @since 1.1
  */
 public class StringToNumberConverterTest {
 	private NumberFormat numberFormat;
 	private NumberFormat numberIntegerFormat;

 	@Before
 	public void setUp() throws Exception {
 		numberFormat = NumberFormat.getNumberInstance();
 		numberFormat.setMaximumFractionDigits(305); // Used for BigDecimal test
 		numberFormat.setGroupingUsed(false); // Not really needed
 		numberIntegerFormat = NumberFormat.getIntegerInstance();
 	}

 	@Test
 	public void testToTypes() throws Exception {
 		assertEquals("Integer.class", Integer.class, StringToNumberConverter.toInteger(false).getToType());
 		assertEquals("Integer.TYPE", Integer.TYPE, StringToNumberConverter.toInteger(true).getToType());
 		assertEquals("Double.class", Double.class, StringToNumberConverter.toDouble(false).getToType());
 		assertEquals("Double.TYPE", Double.TYPE, StringToNumberConverter.toDouble(true).getToType());
 		assertEquals("Long.class", Long.class, StringToNumberConverter.toLong(false).getToType());
 		assertEquals("Long.TYPE", Long.TYPE, StringToNumberConverter.toLong(true).getToType());
 		assertEquals("Float.class", Float.class, StringToNumberConverter.toFloat(false).getToType());
 		assertEquals("Float.TYPE", Float.TYPE, StringToNumberConverter.toFloat(true).getToType());
 		assertEquals("BigInteger.TYPE", BigInteger.class, StringToNumberConverter.toBigInteger().getToType());
 		assertEquals("BigDecimal.TYPE", BigDecimal.class, StringToNumberConverter.toBigDecimal().getToType());
 		assertEquals("Short.class", Short.class, StringToNumberConverter.toShort(false).getToType());
 		assertEquals("Short.TYPE", Short.TYPE, StringToNumberConverter.toShort(true).getToType());
 		assertEquals("Byte.class", Byte.class, StringToNumberConverter.toByte(false).getToType());
 		assertEquals("Byte.TYPE", Byte.TYPE, StringToNumberConverter.toByte(true).getToType());
 	}

 	@Test
 	public void testFromTypeIsString() throws Exception {
 		assertEquals(String.class, StringToNumberConverter.toInteger(false)
 				.getFromType());
 	}

 	@Test
 	public void testConvertsToBigInteger() throws Exception {
 		BigInteger input = BigInteger.valueOf(1000);

 		StringToNumberConverter converter = StringToNumberConverter.toBigInteger();
 		BigInteger result = (BigInteger) converter.convert(numberFormat.format(input));

 		assertEquals(input, result);
 	}

 	Class icuBigDecimal = null;
 	Constructor icuBigDecimalCtr = null;
 	{
 		try {
 			icuBigDecimal = Class.forName("com.ibm.icu.math.BigDecimal");
 			icuBigDecimalCtr = icuBigDecimal.getConstructor(new Class[] {BigInteger.class, int.class});
 		}
 		catch(ClassNotFoundException e) {}
 		catch(NoSuchMethodException e) {}
 	}
 	/**
 	 * Takes a java.math.BigDecimal and returns an ICU formatted string for it.
 	 * These tests depend on ICU to reliably format test strings for comparison.
 	 * Java < 1.5 DecimalFormat did not format/parse BigDecimals properly,
 	 * converting them via doubleValue(), so we have a dependency for this unit test on ICU4J.
 	 * See Bug #180392 for more info.
 	 * @param bd
 	 * @return
 	 * @throws ClassNotFoundException
 	 * @throws NoSuchMethodException
 	 */
 	private String formatBigDecimal(BigDecimal javabd) throws Exception {
 		if(icuBigDecimal != null && icuBigDecimalCtr != null) {
 			// ICU Big Decimal constructor available
 			Number icubd = (Number) icuBigDecimalCtr.newInstance(
 					new Object[] { javabd.unscaledValue(), Integer.valueOf(javabd.scale()) });
 			return numberFormat.format(icubd);
 		}
 		throw new IllegalArgumentException("ICU not present. Cannot reliably format large BigDecimal values; needed for testing. Java platforms prior to 1.5 fail to format/parse these decimals correctly.");
 	}

 	@Test
 	public void testConvertsToBigDecimal() throws Exception {
 		StringToNumberConverter converter = StringToNumberConverter.toBigDecimal();
 		// Test 1: Decimal
 		BigDecimal input = new BigDecimal("100.23");
 		BigDecimal result = (BigDecimal) converter.convert(formatBigDecimal(input));
 		assertEquals("Non-integer BigDecimal", input, result);

 		// Test 2: Long
 		input = new BigDecimal(Integer.MAX_VALUE + 100L);
 		result = (BigDecimal) converter.convert(formatBigDecimal(input));
 		assertEquals("Integral BigDecimal in long range", input, result);

 		// Test 3: BigInteger range
 		input = new BigDecimal("92233720368547990480");
 		result = (BigDecimal) converter.convert(formatBigDecimal(input));
 		assertEquals("Integral BigDecimal in long range", input, result);

 		// Test 4: Very high precision Decimal.
 		input = new BigDecimal("100404101.23345678345678893456789345678923198200134567823456789");
 		result = (BigDecimal) converter.convert(formatBigDecimal(input));
 		assertEquals("Non-integer BigDecimal", input, result);
 	}

 	@Test
 	public void testConvertsToInteger() throws Exception {
 		Integer input = Integer.valueOf(1000);

 		StringToNumberConverter converter = StringToNumberConverter.toInteger(false);
 		Integer result = (Integer) converter.convert(numberIntegerFormat.format(input
 				.longValue()));
 		assertEquals(input, result);
 	}

 	@Test
 	public void testConvertsToDouble() throws Exception {
 		Double input = new Double(1000);

 		StringToNumberConverter converter = StringToNumberConverter.toDouble(false);
 		Double result = (Double) converter.convert(numberFormat.format(input
 				.doubleValue()));

 		assertEquals(input, result);
 	}

 	@Test
 	public void testConvertsToLong() throws Exception {
 		Long input = new Long(1000);

 		StringToNumberConverter converter = StringToNumberConverter.toLong(false);
 		Long result = (Long) converter.convert(numberIntegerFormat.format(input
 				.longValue()));

 		assertEquals(input, result);
 	}

 	@Test
 	public void testConvertsToFloat() throws Exception {
 		Float input = new Float(1000);

 		StringToNumberConverter converter = StringToNumberConverter.toFloat(false);
 		Float result = (Float) converter.convert(numberFormat.format(input
 				.floatValue()));

 		assertEquals(input, result);
 	}

 	@Test
 	public void testConvertedToIntegerPrimitive() throws Exception {
 		Integer input = Integer.valueOf(1000);

 		StringToNumberConverter converter = StringToNumberConverter.toInteger(true);
 		Integer result = (Integer) converter.convert(numberIntegerFormat.format(input
 				.longValue()));
 		assertEquals(input, result);
 	}

 	@Test
 	public void testConvertsToDoublePrimitive() throws Exception {
 		Double input = new Double(1000);

 		StringToNumberConverter converter = StringToNumberConverter.toDouble(true);
 		Double result = (Double) converter.convert(numberFormat.format(input
 				.doubleValue()));

 		assertEquals(input, result);
 	}

 	@Test
 	public void testConvertsToLongPrimitive() throws Exception {
 		Long input = new Long(1000);

 		StringToNumberConverter converter = StringToNumberConverter.toLong(true);
 		Long result = (Long) converter.convert(numberIntegerFormat.format(input
 				.longValue()));

 		assertEquals(input, result);
 	}

 	@Test
 	public void testConvertsToFloatPrimitive() throws Exception {
 		Float input = new Float(1000);

 		StringToNumberConverter converter = StringToNumberConverter.toFloat(true);
 		Float result = (Float) converter.convert(numberFormat.format(input
 				.floatValue()));

 		assertEquals(input, result);
 	}

 	@Test
 	public void testReturnsNullBoxedTypeForEmptyString() throws Exception {
 		StringToNumberConverter converter = StringToNumberConverter.toInteger(false);
 		try {
 			assertNull(converter.convert(""));
 		} catch (Exception e) {
 			fail("exception should not have been thrown");
 		}
 	}

 	@Test
 	public void testThrowsIllegalArgumentExceptionIfAskedToConvertNonString()
 			throws Exception {
 		StringToNumberConverter converter = StringToNumberConverter.toInteger(false);
 		try {
 			converter.convert(Integer.valueOf(1));
 			fail("exception should have been thrown");
 		} catch (IllegalArgumentException e) {
 		}
 	}

 	/**
 	 * Asserts a use case where the integer starts with a valid value but ends
 	 * in an unparsable format.
 	 *
 	 * @throws Exception
 	 */
 	@Test
 	public void testInvalidInteger() throws Exception {
 		StringToNumberConverter converter = StringToNumberConverter
 				.toInteger(false);

 		try {
 			Object result = converter.convert("1 1 -1");
 			fail("exception should have been thrown, but result was " + result);
 		} catch (IllegalArgumentException e) {
 		}
 	}

 	@Test
 	public void testThrowsIllegalArgumentExceptionIfNumberIsOutOfRange() throws Exception {
 		StringToNumberConverter converter = StringToNumberConverter.toInteger(false);
 		try {
 			converter.convert(numberFormat.format(Long.MAX_VALUE));
 			fail("exception should have been thrown");
 		} catch (IllegalArgumentException e) {
 		}
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2007, 2009 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	* Matt Carter - Bug 180392
	******************************************************************************/

	package org.eclipse.core.tests.databinding.conversion;

	import static org.junit.Assert.assertEquals;
	import static org.junit.Assert.assertNull;
	import static org.junit.Assert.fail;

	import java.lang.reflect.Constructor;
	import java.math.BigDecimal;
	import java.math.BigInteger;

	import org.eclipse.core.databinding.conversion.StringToNumberConverter;
	import org.junit.Before;
	import org.junit.Test;

	import com.ibm.icu.text.NumberFormat;

	/**
	* @since 1.1
	*/
	public class StringToNumberConverterTest {
	private NumberFormat numberFormat;
	private NumberFormat numberIntegerFormat;

	@Before
	public void setUp() throws Exception {
	numberFormat = NumberFormat.getNumberInstance();
	numberFormat.setMaximumFractionDigits(305); // Used for BigDecimal test
	numberFormat.setGroupingUsed(false); // Not really needed
	numberIntegerFormat = NumberFormat.getIntegerInstance();
	}

	@Test
	public void testToTypes() throws Exception {
	assertEquals("Integer.class", Integer.class, StringToNumberConverter.toInteger(false).getToType());
	assertEquals("Integer.TYPE", Integer.TYPE, StringToNumberConverter.toInteger(true).getToType());
	assertEquals("Double.class", Double.class, StringToNumberConverter.toDouble(false).getToType());
	assertEquals("Double.TYPE", Double.TYPE, StringToNumberConverter.toDouble(true).getToType());
	assertEquals("Long.class", Long.class, StringToNumberConverter.toLong(false).getToType());
	assertEquals("Long.TYPE", Long.TYPE, StringToNumberConverter.toLong(true).getToType());
	assertEquals("Float.class", Float.class, StringToNumberConverter.toFloat(false).getToType());
	assertEquals("Float.TYPE", Float.TYPE, StringToNumberConverter.toFloat(true).getToType());
	assertEquals("BigInteger.TYPE", BigInteger.class, StringToNumberConverter.toBigInteger().getToType());
	assertEquals("BigDecimal.TYPE", BigDecimal.class, StringToNumberConverter.toBigDecimal().getToType());
	assertEquals("Short.class", Short.class, StringToNumberConverter.toShort(false).getToType());
	assertEquals("Short.TYPE", Short.TYPE, StringToNumberConverter.toShort(true).getToType());
	assertEquals("Byte.class", Byte.class, StringToNumberConverter.toByte(false).getToType());
	assertEquals("Byte.TYPE", Byte.TYPE, StringToNumberConverter.toByte(true).getToType());
	}

	@Test
	public void testFromTypeIsString() throws Exception {
	assertEquals(String.class, StringToNumberConverter.toInteger(false)
	.getFromType());
	}

	@Test
	public void testConvertsToBigInteger() throws Exception {
	BigInteger input = BigInteger.valueOf(1000);

	StringToNumberConverter converter = StringToNumberConverter.toBigInteger();
	BigInteger result = (BigInteger) converter.convert(numberFormat.format(input));

	assertEquals(input, result);
	}

	Class icuBigDecimal = null;
	Constructor icuBigDecimalCtr = null;
	{
	try {
	icuBigDecimal = Class.forName("com.ibm.icu.math.BigDecimal");
	icuBigDecimalCtr = icuBigDecimal.getConstructor(new Class[] {BigInteger.class, int.class});
	}
	catch(ClassNotFoundException e) {}
	catch(NoSuchMethodException e) {}
	}
	/**
	* Takes a java.math.BigDecimal and returns an ICU formatted string for it.
	* These tests depend on ICU to reliably format test strings for comparison.
	* Java < 1.5 DecimalFormat did not format/parse BigDecimals properly,
	* converting them via doubleValue(), so we have a dependency for this unit test on ICU4J.
	* See Bug #180392 for more info.
	* @param bd
	* @return
	* @throws ClassNotFoundException
	* @throws NoSuchMethodException
	*/
	private String formatBigDecimal(BigDecimal javabd) throws Exception {
	if(icuBigDecimal != null && icuBigDecimalCtr != null) {
	// ICU Big Decimal constructor available
	Number icubd = (Number) icuBigDecimalCtr.newInstance(
	new Object[] { javabd.unscaledValue(), Integer.valueOf(javabd.scale()) });
	return numberFormat.format(icubd);
	}
	throw new IllegalArgumentException("ICU not present. Cannot reliably format large BigDecimal values; needed for testing. Java platforms prior to 1.5 fail to format/parse these decimals correctly.");
	}

	@Test
	public void testConvertsToBigDecimal() throws Exception {
	StringToNumberConverter converter = StringToNumberConverter.toBigDecimal();
	// Test 1: Decimal
	BigDecimal input = new BigDecimal("100.23");
	BigDecimal result = (BigDecimal) converter.convert(formatBigDecimal(input));
	assertEquals("Non-integer BigDecimal", input, result);

	// Test 2: Long
	input = new BigDecimal(Integer.MAX_VALUE + 100L);
	result = (BigDecimal) converter.convert(formatBigDecimal(input));
	assertEquals("Integral BigDecimal in long range", input, result);

	// Test 3: BigInteger range
	input = new BigDecimal("92233720368547990480");
	result = (BigDecimal) converter.convert(formatBigDecimal(input));
	assertEquals("Integral BigDecimal in long range", input, result);

	// Test 4: Very high precision Decimal.
	input = new BigDecimal("100404101.23345678345678893456789345678923198200134567823456789");
	result = (BigDecimal) converter.convert(formatBigDecimal(input));
	assertEquals("Non-integer BigDecimal", input, result);
	}

	@Test
	public void testConvertsToInteger() throws Exception {
	Integer input = Integer.valueOf(1000);

	StringToNumberConverter converter = StringToNumberConverter.toInteger(false);
	Integer result = (Integer) converter.convert(numberIntegerFormat.format(input
	.longValue()));
	assertEquals(input, result);
	}

	@Test
	public void testConvertsToDouble() throws Exception {
	Double input = new Double(1000);

	StringToNumberConverter converter = StringToNumberConverter.toDouble(false);
	Double result = (Double) converter.convert(numberFormat.format(input
	.doubleValue()));

	assertEquals(input, result);
	}

	@Test
	public void testConvertsToLong() throws Exception {
	Long input = new Long(1000);

	StringToNumberConverter converter = StringToNumberConverter.toLong(false);
	Long result = (Long) converter.convert(numberIntegerFormat.format(input
	.longValue()));

	assertEquals(input, result);
	}

	@Test
	public void testConvertsToFloat() throws Exception {
	Float input = new Float(1000);

	StringToNumberConverter converter = StringToNumberConverter.toFloat(false);
	Float result = (Float) converter.convert(numberFormat.format(input
	.floatValue()));

	assertEquals(input, result);
	}

	@Test
	public void testConvertedToIntegerPrimitive() throws Exception {
	Integer input = Integer.valueOf(1000);

	StringToNumberConverter converter = StringToNumberConverter.toInteger(true);
	Integer result = (Integer) converter.convert(numberIntegerFormat.format(input
	.longValue()));
	assertEquals(input, result);
	}

	@Test
	public void testConvertsToDoublePrimitive() throws Exception {
	Double input = new Double(1000);

	StringToNumberConverter converter = StringToNumberConverter.toDouble(true);
	Double result = (Double) converter.convert(numberFormat.format(input
	.doubleValue()));

	assertEquals(input, result);
	}

	@Test
	public void testConvertsToLongPrimitive() throws Exception {
	Long input = new Long(1000);

	StringToNumberConverter converter = StringToNumberConverter.toLong(true);
	Long result = (Long) converter.convert(numberIntegerFormat.format(input
	.longValue()));

	assertEquals(input, result);
	}

	@Test
	public void testConvertsToFloatPrimitive() throws Exception {
	Float input = new Float(1000);

	StringToNumberConverter converter = StringToNumberConverter.toFloat(true);
	Float result = (Float) converter.convert(numberFormat.format(input
	.floatValue()));

	assertEquals(input, result);
	}

	@Test
	public void testReturnsNullBoxedTypeForEmptyString() throws Exception {
	StringToNumberConverter converter = StringToNumberConverter.toInteger(false);
	try {
	assertNull(converter.convert(""));
	} catch (Exception e) {
	fail("exception should not have been thrown");
	}
	}

	@Test
	public void testThrowsIllegalArgumentExceptionIfAskedToConvertNonString()
	throws Exception {
	StringToNumberConverter converter = StringToNumberConverter.toInteger(false);
	try {
	converter.convert(Integer.valueOf(1));
	fail("exception should have been thrown");
	} catch (IllegalArgumentException e) {
	}
	}

	/**
	* Asserts a use case where the integer starts with a valid value but ends
	* in an unparsable format.
	*
	* @throws Exception
	*/
	@Test
	public void testInvalidInteger() throws Exception {
	StringToNumberConverter converter = StringToNumberConverter
	.toInteger(false);

	try {
	Object result = converter.convert("1 1 -1");
	fail("exception should have been thrown, but result was " + result);
	} catch (IllegalArgumentException e) {
	}
	}

	@Test
	public void testThrowsIllegalArgumentExceptionIfNumberIsOutOfRange() throws Exception {
	StringToNumberConverter converter = StringToNumberConverter.toInteger(false);
	try {
	converter.convert(numberFormat.format(Long.MAX_VALUE));
	fail("exception should have been thrown");
	} catch (IllegalArgumentException e) {
	}
	}
	}