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/*
* Copyright (C) 2011 The Android Open Source Project
*
* 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 libcore.java.lang;
import java.util.Properties;
public class IntegerTest extends junit.framework.TestCase {
public void testSystemProperties() {
Properties originalProperties = System.getProperties();
try {
Properties testProperties = new Properties();
testProperties.put("testIncInt", "notInt");
System.setProperties(testProperties);
assertNull("returned incorrect default Integer",
Integer.getInteger("testIncInt"));
assertEquals(new Integer(4), Integer.getInteger("testIncInt", 4));
assertEquals(new Integer(4),
Integer.getInteger("testIncInt", new Integer(4)));
} finally {
System.setProperties(originalProperties);
}
}
public void testCompare() throws Exception {
final int min = Integer.MIN_VALUE;
final int zero = 0;
final int max = Integer.MAX_VALUE;
assertTrue(Integer.compare(max, max) == 0);
assertTrue(Integer.compare(min, min) == 0);
assertTrue(Integer.compare(zero, zero) == 0);
assertTrue(Integer.compare(max, zero) > 0);
assertTrue(Integer.compare(max, min) > 0);
assertTrue(Integer.compare(zero, max) < 0);
assertTrue(Integer.compare(zero, min) > 0);
assertTrue(Integer.compare(min, zero) < 0);
assertTrue(Integer.compare(min, max) < 0);
}
public void testParseInt() throws Exception {
assertEquals(0, Integer.parseInt("+0", 10));
assertEquals(473, Integer.parseInt("+473", 10));
assertEquals(255, Integer.parseInt("+FF", 16));
assertEquals(102, Integer.parseInt("+1100110", 2));
assertEquals(2147483647, Integer.parseInt("+2147483647", 10));
assertEquals(411787, Integer.parseInt("Kona", 27));
assertEquals(411787, Integer.parseInt("+Kona", 27));
assertEquals(-145, Integer.parseInt("-145", 10));
try {
Integer.parseInt("--1", 10); // multiple sign chars
fail();
} catch (NumberFormatException expected) {}
try {
Integer.parseInt("++1", 10); // multiple sign chars
fail();
} catch (NumberFormatException expected) {}
try {
Integer.parseInt("Kona", 10); // base too small
fail();
} catch (NumberFormatException expected) {}
}
public void testDecodeInt() throws Exception {
assertEquals(0, Integer.decode("+0").intValue());
assertEquals(473, Integer.decode("+473").intValue());
assertEquals(255, Integer.decode("+0xFF").intValue());
assertEquals(16, Integer.decode("+020").intValue());
assertEquals(2147483647, Integer.decode("+2147483647").intValue());
assertEquals(-73, Integer.decode("-73").intValue());
assertEquals(-255, Integer.decode("-0xFF").intValue());
assertEquals(255, Integer.decode("+#FF").intValue());
assertEquals(-255, Integer.decode("-#FF").intValue());
try {
Integer.decode("--1"); // multiple sign chars
fail();
} catch (NumberFormatException expected) {}
try {
Integer.decode("++1"); // multiple sign chars
fail();
} catch (NumberFormatException expected) {}
try {
Integer.decode("-+1"); // multiple sign chars
fail();
} catch (NumberFormatException expected) {}
try {
Integer.decode("Kona"); // invalid number
fail();
} catch (NumberFormatException expected) {}
}
public void testParsePositiveInt() throws Exception {
assertEquals(0, Integer.parsePositiveInt("0", 10));
assertEquals(473, Integer.parsePositiveInt("473", 10));
assertEquals(255, Integer.parsePositiveInt("FF", 16));
try {
Integer.parsePositiveInt("-1", 10);
fail();
} catch (NumberFormatException e) {}
try {
Integer.parsePositiveInt("+1", 10);
fail();
} catch (NumberFormatException e) {}
try {
Integer.parsePositiveInt("+0", 16);
fail();
} catch (NumberFormatException e) {}
}
}
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