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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
/**
* @author Vladimir N. Molotkov
* @version $Revision$
*/
package tests.security.spec;
import junit.framework.TestCase;
import java.math.BigInteger;
import java.security.spec.ECPoint;
/**
* Tests for <code>ECPoint</code> class fields and methods.
*
*/
public class ECPointTest extends TestCase {
//
// Tests
//
/**
* Test #1 for <code>ECPoint(BigInteger, BigInteger)</code> constructor<br>
* Assertion: creates <code>ECPoint</code> instance<br>
* Test preconditions: valid parameters passed<br>
* Expected: must pass without any exceptions
*/
public final void testECPoint01() {
new ECPoint(BigInteger.ZERO, BigInteger.ZERO);
new ECPoint(BigInteger.valueOf(-23456L), BigInteger.valueOf(-23456L));
new ECPoint(BigInteger.valueOf(123456L), BigInteger.valueOf(123456L));
new ECPoint(BigInteger.valueOf(-56L), BigInteger.valueOf(234L));
new ECPoint(BigInteger.valueOf(3456L), BigInteger.valueOf(-2344L));
}
/**
* Test #2 for <code>ECPoint(BigInteger x, BigInteger y)</code> constructor<br>
* Assertion: throws <code>NullPointerException</code> if <code>x</code>or
* <code>y</code> is <code>null</code><br>
* Test preconditions: pass <code>null</code> as mentioned parameters<br>
* Expected: must throw <code>NullPointerException</code>
*/
public final void testECPoint02() {
// test case 1: x is null
try {
new ECPoint(null, BigInteger.ZERO);
fail("#1: Expected NPE not thrown");
} catch (NullPointerException ok) {
}
// test case 2: y is null
try {
new ECPoint(BigInteger.ZERO, null);
fail("#2: Expected NPE not thrown");
} catch (NullPointerException ok) {
}
// test case 3: both : x and y are null
try {
new ECPoint(null, null);
fail("#3: Expected NPE not thrown");
} catch (NullPointerException ok) {
}
}
/**
* Test #1 for <code>getAffineX()</code> method<br>
* Assertion: returns affine <code>x</code> coordinate<br>
* Test preconditions: <code>ECPoint</code> instance
* created using valid parameters<br>
* Expected: must return affine <code>x</code> coordinate
* which is equal to the one passed to the constructor;
* (both must refer the same object)
*/
public final void testGetAffineX01() {
BigInteger x = BigInteger.valueOf(-23456L);
ECPoint p = new ECPoint(x, BigInteger.valueOf(23456L));
BigInteger xRet = p.getAffineX();
assertEquals(x, xRet);
assertSame(x, xRet);
}
/**
* Test #2 for <code>getAffineX()</code> method<br>
* Assertion: returns <code>null</code> for <code>ECPoint.POINT_INFINITY</code><br>
* Test preconditions: none<br>
* Expected: must return <code>null</code> for
* <code>ECPoint.POINT_INFINITY</code>
*/
public final void testGetAffineX02() {
assertNull(ECPoint.POINT_INFINITY.getAffineX());
}
/**
* Test #1 for <code>getAffineY()</code> method<br>
* Assertion: returns affine <code>y</code> coordinate<br>
* Test preconditions: <code>ECPoint</code> instance
* created using valid parameters<br>
* Expected: must return affine <code>y</code> coordinate
* which is equal to the one passed to the constructor;
* (both must refer the same object)
*/
public final void testGetAffineY01() {
BigInteger y = BigInteger.valueOf(23456L);
ECPoint p = new ECPoint(BigInteger.valueOf(-23456L), y);
BigInteger yRet = p.getAffineY();
assertEquals(y, yRet);
assertSame(y, yRet);
}
/**
* Test #2 for <code>getAffineX()</code> method<br>
* Assertion: returns <code>null</code> for <code>ECPoint.POINT_INFINITY</code><br>
* Test preconditions: none<br>
* Expected: must return <code>null</code> for
* <code>ECPoint.POINT_INFINITY</code>
*/
public final void testGetAffineY02() {
assertNull(ECPoint.POINT_INFINITY.getAffineY());
}
/**
* Test #1 for <code>equals(Object other)</code> method<br>
* Assertion: return true if this and other objects are equal<br>
* Test preconditions: see test comments<br>
* Expected: all objects in this test must be equal
*/
public final void testEqualsObject01() {
// test case 1: must be equal to itself
ECPoint p2=null, p1 =
new ECPoint(BigInteger.valueOf(-23456L), BigInteger.ONE);
assertTrue(p1.equals(p1));
// test case 2: equal objects
p1 = new ECPoint(BigInteger.valueOf(-23456L), BigInteger.ONE);
p2 = new ECPoint(BigInteger.valueOf(-23456L), BigInteger.valueOf(1L));
assertTrue(p1.equals(p2) && p2.equals(p1));
// test case 3: equal POINT_INFINITY object(s)
p1 = ECPoint.POINT_INFINITY;
p2 = ECPoint.POINT_INFINITY;
assertTrue(p1.equals(p2) && p2.equals(p1));
}
/**
* Test #2 for <code>equals(Object other)</code> method<br>
* Assertion: return false if this and other objects are not equal<br>
* Test preconditions: see test comments<br>
* Expected: all objects in this test must be not equal
*/
public final void testEqualsObject02() {
// test case 1: must be not equal to null
ECPoint p2=null, p1 =
new ECPoint(BigInteger.valueOf(-23456L), BigInteger.ONE);
assertFalse(p1.equals(p2));
// test case 2: not equal objects - x
p1 = new ECPoint(BigInteger.valueOf(-23457L), BigInteger.ONE);
p2 = new ECPoint(BigInteger.valueOf(-23456L), BigInteger.valueOf(1L));
assertFalse(p1.equals(p2) || p2.equals(p1));
// test case 3: not equal objects - y
p1 = new ECPoint(BigInteger.valueOf(-23457L), BigInteger.ONE);
p2 = new ECPoint(BigInteger.valueOf(-23456L), BigInteger.ZERO);
assertFalse(p1.equals(p2) || p2.equals(p1));
// test case 4: not equal - some point and POINT_INFINITY
p1 = ECPoint.POINT_INFINITY;
p2 = new ECPoint(BigInteger.valueOf(-23456L), BigInteger.ZERO);
assertFalse(p1.equals(p2) || p2.equals(p1));
}
/**
* Test #1 for <code>hashCode()</code> method.<br>
*
* Assertion: must return the same value if invoked
* repeatedly on the same object.
*/
public final void testHashCode01() {
ECPoint f = new ECPoint(BigInteger.valueOf(-23457L), BigInteger.ONE);
int hc = f.hashCode();
assertTrue(hc == f.hashCode() &&
hc == f.hashCode() &&
hc == f.hashCode() &&
hc == f.hashCode() &&
hc == f.hashCode() &&
hc == f.hashCode() &&
hc == f.hashCode() &&
hc == f.hashCode());
// the same for POINT_INFINITY
hc = ECPoint.POINT_INFINITY.hashCode();
assertTrue(hc == ECPoint.POINT_INFINITY.hashCode() &&
hc == ECPoint.POINT_INFINITY.hashCode() &&
hc == ECPoint.POINT_INFINITY.hashCode() &&
hc == ECPoint.POINT_INFINITY.hashCode() &&
hc == ECPoint.POINT_INFINITY.hashCode() &&
hc == ECPoint.POINT_INFINITY.hashCode() &&
hc == ECPoint.POINT_INFINITY.hashCode() &&
hc == ECPoint.POINT_INFINITY.hashCode());
}
/**
* Test #2 for <code>hashCode()</code> method.<br>
*
* Assertion: must return the same value if invoked
* on equal (according to the <code>equals(Object)</code> method) objects.
*/
public final void testHashCode02() {
ECPoint p1 = new ECPoint(BigInteger.valueOf(-23456L), BigInteger.ONE);
ECPoint p2 = new ECPoint(BigInteger.valueOf(-23456L), BigInteger.valueOf(1L));
assertEquals(p1.hashCode(), p2.hashCode());
}
}
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