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/*******************************************************************************
* Copyright (c) 2007, 2018 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* 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 java.lang.reflect.Constructor;
import java.math.BigDecimal;
import java.math.BigInteger;
import org.eclipse.core.databinding.conversion.NumberToStringConverter;
import org.junit.Before;
import org.junit.Test;
import com.ibm.icu.text.NumberFormat;
/**
* @since 1.1
*/
public class NumberToStringConverterTest {
private NumberFormat numberFormat;
private NumberFormat integerFormat;
@Before
public void setUp() throws Exception {
numberFormat = NumberFormat.getNumberInstance();
integerFormat = NumberFormat.getIntegerInstance();
}
@Test
public void testFromTypes() throws Exception {
assertEquals("Integer.class", Integer.class, NumberToStringConverter
.fromInteger(false).getFromType());
assertEquals("Integer.TYPE", Integer.TYPE, NumberToStringConverter
.fromInteger(true).getFromType());
assertEquals("Double.class", Double.class, NumberToStringConverter
.fromDouble(false).getFromType());
assertEquals("Double.TYPE", Double.TYPE, NumberToStringConverter
.fromDouble(true).getFromType());
assertEquals("Long.class", Long.class, NumberToStringConverter
.fromLong(false).getFromType());
assertEquals("Long.TYPE", Long.TYPE, NumberToStringConverter.fromLong(
true).getFromType());
assertEquals("Float.class", Float.class, NumberToStringConverter
.fromFloat(false).getFromType());
assertEquals("Float.TYPE", Float.TYPE, NumberToStringConverter
.fromFloat(true).getFromType());
assertEquals("BigInteger.class", BigInteger.class,
NumberToStringConverter.fromBigInteger().getFromType());
assertEquals("BigDecimal.class", BigDecimal.class,
NumberToStringConverter.fromBigDecimal().getFromType());
assertEquals("Short.class", Short.class,
NumberToStringConverter.fromShort(false).getFromType());
assertEquals("Byte.class", Byte.class,
NumberToStringConverter.fromByte(false).getFromType());
}
@Test
public void testToTypeIsStringClass() throws Exception {
assertEquals(String.class, NumberToStringConverter.fromInteger(false)
.getToType());
}
@Test
public void testConvertIntegerToString() throws Exception {
Integer input = Integer.valueOf(1000);
String expected = integerFormat.format(input.longValue());
NumberToStringConverter converter = NumberToStringConverter.fromInteger(false);
String result = converter.convert(input);
assertEquals(expected, result);
}
@Test
public void testConvertDoubleToString() throws Exception {
Double input = new Double(1000.1d);
String expected = numberFormat.format(input.doubleValue());
NumberToStringConverter converter = NumberToStringConverter
.fromDouble(false);
String result = converter.convert(input);
assertEquals(expected, result);
}
@Test
public void testConvertFloatToString() throws Exception {
Float input = new Float(1000.1f);
String expected = numberFormat.format(input.floatValue());
NumberToStringConverter converter = NumberToStringConverter
.fromFloat(false);
String result = converter.convert(input);
assertEquals(expected, result);
}
@Test
public void testConvertLongToString() throws Exception {
Long input = new Long(1000l);
String expected = integerFormat.format(input.longValue());
NumberToStringConverter converter = NumberToStringConverter
.fromLong(false);
String result = converter.convert(input);
assertEquals(expected, result);
}
@Test
public void testConvertBigIntegerToString() throws Exception {
BigInteger input = BigInteger.valueOf(1000);
String expected = integerFormat.format(input);
NumberToStringConverter converter = NumberToStringConverter.fromBigInteger();
String result = converter.convert(input);
assertEquals(expected, result);
}
Class<?> icuBigDecimal = null;
Constructor<?> icuBigDecimalCtr = null;
{
try {
icuBigDecimal = Class.forName("com.ibm.icu.math.BigDecimal");
icuBigDecimalCtr = icuBigDecimal.getConstructor(BigInteger.class, int.class);
}
catch(ClassNotFoundException e) {}
catch(NoSuchMethodException e) {}
}
/**
* Takes a java.math.BigDecimal and returns an ICU formatted string for it,
* when ICU is available, otherwise platform default. Note that
* Java < 1.5 did not format BigDecimals properly, truncating them via doubleValue(),
* so this method will return bad results, Data Binding will not, so
* the test will FAIL on Java < 1.5 under these conditions.
* @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(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 testConvertBigDecimalToString() throws Exception {
NumberToStringConverter converter = NumberToStringConverter.fromBigDecimal();
// Test 1: Decimal
BigDecimal input = new BigDecimal("100.23");
String expected = formatBigDecimal(input);
String result = converter.convert(input);
assertEquals("Non-integer BigDecimal", expected, result);
// Test 2: Long
input = BigDecimal.valueOf(Integer.MAX_VALUE + 100L);
expected = formatBigDecimal(input);
result = converter.convert(input);
assertEquals("Integral BigDecimal in long range", expected, result);
// Test 3: BigInteger range
input = new BigDecimal(BigInteger.valueOf(Long.MAX_VALUE).add(BigInteger.valueOf(100L)));
expected = formatBigDecimal(input);
result = converter.convert(input);
assertEquals("Integral BigDecimal in BigInteger range", expected, result);
// Test 4: Very high precision Decimal
input = new BigDecimal("100404101.233456783456788934567893456789231982001345678234567890");
expected = formatBigDecimal(input);
result = converter.convert(input);
assertEquals("High-precision BigDecimal", expected, result);
}
@Test
public void testNullSourceConvertsToEmptyString() throws Exception {
NumberToStringConverter converter = NumberToStringConverter
.fromInteger(false);
assertEquals("", converter.convert(null));
}
}
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