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/*
* Copyright 2006-2012 Amazon Technologies, Inc. or its affiliates.
* Amazon, Amazon.com and Carbonado are trademarks or registered trademarks
* of Amazon Technologies, Inc. or its affiliates. All rights reserved.
*
* 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 com.amazon.carbonado.util;
import junit.framework.TestCase;
import junit.framework.TestSuite;
/**
* Test cases for {@link ConversionComparator}.
*
* @author Brian S O'Neill
*/
public class TestConversionComparator extends TestCase {
private static final int BOOLEAN_CODE = 0;
private static final int BYTE_CODE = 1;
private static final int SHORT_CODE = 2;
private static final int CHAR_CODE = 3;
private static final int INT_CODE = 4;
private static final int FLOAT_CODE = 5;
private static final int LONG_CODE = 6;
private static final int DOUBLE_CODE = 7;
private static final Class[] PRIMITIVE_CLASSES = {
boolean.class, byte.class, short.class, char.class,
int.class, float.class, long.class, double.class
};
private static final Class[] BOXED_PRIMITIVE_CLASSES = {
Boolean.class, Byte.class, Short.class, Character.class,
Integer.class, Float.class, Long.class, Double.class
};
// States which primitive conversions are allowed.
private static final boolean[][] PRIMITIVE_MATRIX = {
// from...
// boolean byte short char int float long double
{ true, false, false, false, false, false, false, false }, // to boolean
{ false, true, false, false, false, false, false, false }, // to byte
{ false, true, true, false, false, false, false, false }, // to short
{ false, false, false, true, false, false, false, false }, // to char
{ false, true, true, false, true, false, false, false }, // to int
{ false, true, true, false, false, true, false, false }, // to float
{ false, true, true, false, true, false, true, false }, // to long
{ false, true, true, false, true, true, false, true }, // to double
};
public static void main(String[] args) {
junit.textui.TestRunner.run(suite());
}
public static TestSuite suite() {
return new TestSuite(TestConversionComparator.class);
}
public TestConversionComparator(String name) {
super(name);
}
public void test_isConversionPossible_basics() {
ConversionComparator cc = new ConversionComparator(Object.class);
assertEquals(true, cc.isConversionPossible(Object.class));
assertEquals(false, cc.isConversionPossible(String.class));
assertEquals(false, cc.isConversionPossible(boolean.class));
assertEquals(false, cc.isConversionPossible(Integer.class));
assertEquals(false, cc.isConversionPossible(int.class));
cc = new ConversionComparator(String.class);
assertEquals(true, cc.isConversionPossible(Object.class));
assertEquals(true, cc.isConversionPossible(String.class));
assertEquals(false, cc.isConversionPossible(boolean.class));
assertEquals(false, cc.isConversionPossible(Integer.class));
assertEquals(false, cc.isConversionPossible(int.class));
cc = new ConversionComparator(boolean.class);
assertEquals(true, cc.isConversionPossible(Object.class));
assertEquals(false, cc.isConversionPossible(String.class));
assertEquals(true, cc.isConversionPossible(boolean.class));
assertEquals(false, cc.isConversionPossible(Integer.class));
assertEquals(false, cc.isConversionPossible(int.class));
cc = new ConversionComparator(Integer.class);
assertEquals(true, cc.isConversionPossible(Object.class));
assertEquals(false, cc.isConversionPossible(String.class));
assertEquals(false, cc.isConversionPossible(boolean.class));
assertEquals(true, cc.isConversionPossible(Integer.class));
assertEquals(true, cc.isConversionPossible(int.class));
cc = new ConversionComparator(int.class);
assertEquals(true, cc.isConversionPossible(Object.class));
assertEquals(false, cc.isConversionPossible(String.class));
assertEquals(false, cc.isConversionPossible(boolean.class));
assertEquals(true, cc.isConversionPossible(Integer.class));
assertEquals(true, cc.isConversionPossible(int.class));
}
public void test_isConversionPossible_primitives() {
test_isConversionPossible_primitives(false, false);
test_isConversionPossible_primitives(false, true);
test_isConversionPossible_primitives(true, false);
test_isConversionPossible_primitives(true, true);
}
private void test_isConversionPossible_primitives(boolean fromBoxed, boolean toBoxed) {
for (int fromCode = BOOLEAN_CODE; fromCode <= DOUBLE_CODE; fromCode++) {
ConversionComparator cc = new ConversionComparator
(fromBoxed ? BOXED_PRIMITIVE_CLASSES[fromCode] : PRIMITIVE_CLASSES[fromCode]);
for (int toCode = BOOLEAN_CODE; toCode <= DOUBLE_CODE; toCode++) {
boolean expected = PRIMITIVE_MATRIX[toCode][fromCode];
Class toType = toBoxed ? BOXED_PRIMITIVE_CLASSES[toCode] : PRIMITIVE_CLASSES[toCode];
assertEquals(expected, cc.isConversionPossible(toType));
}
}
}
public void test_compare() {
ConversionComparator cc = new ConversionComparator(Object.class);
assertEquals(true, cc.compare(Object.class, String.class) < 0);
assertEquals(true, cc.compare(String.class, Object.class) > 0);
assertEquals(0, cc.compare(Object.class, Object.class));
assertEquals(0, cc.compare(String.class, String.class));
assertEquals(0, cc.compare(String.class, String.class));
assertEquals(0, cc.compare(int.class, Number.class));
cc = new ConversionComparator(String.class);
assertEquals(true, cc.compare(String.class, Object.class) < 0);
assertEquals(true, cc.compare(Object.class, String.class) > 0);
assertEquals(0, cc.compare(String.class, String.class));
assertEquals(true, cc.compare(int.class, String.class) > 0);
cc = new ConversionComparator(Integer.class);
assertEquals(true, cc.compare(String.class, Object.class) > 0);
assertEquals(true, cc.compare(Object.class, String.class) < 0);
assertEquals(true, cc.compare(Object.class, Number.class) > 0);
assertEquals(true, cc.compare(Integer.class, Number.class) < 0);
assertEquals(true, cc.compare(int.class, Number.class) > 0);
assertEquals(true, cc.compare(long.class, Number.class) > 0);
assertEquals(true, cc.compare(long.class, Long.class) < 0);
cc = new ConversionComparator(int.class);
assertEquals(true, cc.compare(String.class, Object.class) > 0);
assertEquals(true, cc.compare(Object.class, String.class) < 0);
assertEquals(true, cc.compare(Object.class, Number.class) > 0);
assertEquals(true, cc.compare(Integer.class, Number.class) < 0);
assertEquals(true, cc.compare(int.class, Number.class) < 0);
assertEquals(true, cc.compare(long.class, Number.class) < 0);
assertEquals(true, cc.compare(long.class, Long.class) < 0);
cc = new ConversionComparator(Byte.class);
assertEquals(true, cc.compare(int.class, Number.class) > 0);
assertEquals(true, cc.compare(long.class, Number.class) > 0);
assertEquals(true, cc.compare(long.class, Integer.class) < 0);
cc = new ConversionComparator(byte.class);
assertEquals(true, cc.compare(short.class, int.class) < 0);
assertEquals(true, cc.compare(long.class, int.class) > 0);
cc = new ConversionComparator(java.util.Date.class);
assertEquals(true, cc.compare(Object.class, Comparable.class) > 0);
assertEquals(0, cc.compare(java.io.Serializable.class, Comparable.class));
}
}
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