2.1/user/test/com/google/gwt/emultest/java/math/BigIntegerNotTest.java

/*
 * Copyright 2009 Google Inc.
 * 
 * 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.
 */

/*
 * 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.
 * 
 * INCLUDES MODIFICATIONS BY GOOGLE.
 */
/**
 * author Elena Semukhina
 */
package com.google.gwt.emultest.java.math;

import com.google.gwt.emultest.java.util.EmulTestBase;

import java.math.BigInteger;

/**
 * Class: java.math.BigInteger Methods: and, andNot.
 */
public class BigIntegerNotTest extends EmulTestBase {
  /**
   * andNot for two negative numbers; the first is longer.
   */
  public void testAndNotNegNegFirstLonger() {
    byte aBytes[] = {
        -128, 9, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, -117, 23, 87,
        -25, -75};
    byte bBytes[] = {-2, -3, -4, -4, 5, 14, 23, 39, 48, 57, 66, 5, 14, 23};
    int aSign = -1;
    int bSign = -1;
    byte rBytes[] = {73, -92, -48, 4, 12, 6, 4, 32, 48, 64, 0, 8, 2};
    BigInteger aNumber = new BigInteger(aSign, aBytes);
    BigInteger bNumber = new BigInteger(bSign, bBytes);
    BigInteger result = aNumber.andNot(bNumber);
    byte resBytes[] = new byte[rBytes.length];
    resBytes = result.toByteArray();
    for (int i = 0; i < resBytes.length; i++) {
      assertTrue(resBytes[i] == rBytes[i]);
    }
    assertEquals("incorrect sign", 1, result.signum());
  }

  /**
   * andNot for two positive numbers; the first is longer.
   */
  public void testAndNotPosPosFirstLonger() {
    byte aBytes[] = {
        -128, 9, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, -117, 23, 87,
        -25, -75};
    byte bBytes[] = {-2, -3, -4, -4, 5, 14, 23, 39, 48, 57, 66, 5, 14, 23};
    int aSign = 1;
    int bSign = 1;
    byte rBytes[] = {
        0, -128, 9, 56, 100, 0, 0, 1, 1, 90, 1, -32, 0, 10, -126, 21, 82, -31,
        -96};
    BigInteger aNumber = new BigInteger(aSign, aBytes);
    BigInteger bNumber = new BigInteger(bSign, bBytes);
    BigInteger result = aNumber.andNot(bNumber);
    byte resBytes[] = new byte[rBytes.length];
    resBytes = result.toByteArray();
    for (int i = 0; i < resBytes.length; i++) {
      assertTrue(resBytes[i] == rBytes[i]);
    }
    assertEquals("incorrect sign", 1, result.signum());
  }

  /**
   * andNot for two positive numbers; the first is shorter.
   */
  public void testAndNotPosPosFirstShorter() {
    byte aBytes[] = {-2, -3, -4, -4, 5, 14, 23, 39, 48, 57, 66, 5, 14, 23};
    byte bBytes[] = {
        -128, 9, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, -117, 23, 87,
        -25, -75};
    int aSign = 1;
    int bSign = 1;
    byte rBytes[] = {73, -92, -48, 4, 12, 6, 4, 32, 48, 64, 0, 8, 2};
    BigInteger aNumber = new BigInteger(aSign, aBytes);
    BigInteger bNumber = new BigInteger(bSign, bBytes);
    BigInteger result = aNumber.andNot(bNumber);
    byte resBytes[] = new byte[rBytes.length];
    resBytes = result.toByteArray();
    for (int i = 0; i < resBytes.length; i++) {
      assertTrue(resBytes[i] == rBytes[i]);
    }
    assertEquals("incorrect sign", 1, result.signum());
  }

  /**
   * andNot for a negative and a positive numbers; the first is longer.
   */
  public void testNegPosFirstLonger() {
    byte aBytes[] = {
        -128, 9, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, -117, 23, 87,
        -25, -75};
    byte bBytes[] = {-2, -3, -4, -4, 5, 14, 23, 39, 48, 57, 66, 5, 14, 23};
    int aSign = -1;
    int bSign = 1;
    byte rBytes[] = {
        -1, 127, -10, -57, -101, 1, 2, 2, 2, -96, -16, 8, -40, -59, 68, -88,
        -88, 16, 72};
    BigInteger aNumber = new BigInteger(aSign, aBytes);
    BigInteger bNumber = new BigInteger(bSign, bBytes);
    BigInteger result = aNumber.andNot(bNumber);
    byte resBytes[] = new byte[rBytes.length];
    resBytes = result.toByteArray();
    for (int i = 0; i < resBytes.length; i++) {
      assertTrue(resBytes[i] == rBytes[i]);
    }
    assertEquals("incorrect sign", -1, result.signum());
  }

  /**
   * Not for a negative number.
   */
  public void testNotNeg() {
    byte aBytes[] = {-128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, -117};
    int aSign = -1;
    byte rBytes[] = {
        0, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, -118};
    BigInteger aNumber = new BigInteger(aSign, aBytes);
    BigInteger result = aNumber.not();
    byte resBytes[] = new byte[rBytes.length];
    resBytes = result.toByteArray();
    for (int i = 0; i < resBytes.length; i++) {
      assertTrue(resBytes[i] == rBytes[i]);
    }
    assertEquals("incorrect sign", 1, result.signum());
  }

  /**
   * Not for ONE.
   */
  public void testNotOne() {
    byte rBytes[] = {-2};
    BigInteger aNumber = BigInteger.ONE;
    BigInteger result = aNumber.not();
    byte resBytes[] = new byte[rBytes.length];
    resBytes = result.toByteArray();
    for (int i = 0; i < resBytes.length; i++) {
      assertTrue(resBytes[i] == rBytes[i]);
    }
    assertEquals("incorrect sign", -1, result.signum());
  }

  /**
   * Not for a positive number.
   */
  public void testNotPos() {
    byte aBytes[] = {-128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, -117};
    int aSign = 1;
    byte rBytes[] = {
        -1, 127, -57, -101, 1, 75, -90, -46, -92, -4, 14, -36, -27, 116};
    BigInteger aNumber = new BigInteger(aSign, aBytes);
    BigInteger result = aNumber.not();
    byte resBytes[] = new byte[rBytes.length];
    resBytes = result.toByteArray();
    for (int i = 0; i < resBytes.length; i++) {
      assertTrue(resBytes[i] == rBytes[i]);
    }
    assertEquals("incorrect sign", -1, result.signum());
  }

  /**
   * Not for a negative number.
   */

  public void testNotSpecialCase() {
    byte aBytes[] = {-1, -1, -1, -1};
    int aSign = 1;
    byte rBytes[] = {-1, 0, 0, 0, 0};
    BigInteger aNumber = new BigInteger(aSign, aBytes);
    BigInteger result = aNumber.not();
    byte resBytes[] = new byte[rBytes.length];
    resBytes = result.toByteArray();
    for (int i = 0; i < resBytes.length; i++) {
      assertTrue(resBytes[i] == rBytes[i]);
    }
    assertEquals("incorrect sign", -1, result.signum());
  }

  /**
   * Not for ZERO.
   */
  public void testNotZero() {
    byte rBytes[] = {-1};
    BigInteger aNumber = BigInteger.ZERO;
    BigInteger result = aNumber.not();
    byte resBytes[] = new byte[rBytes.length];
    resBytes = result.toByteArray();
    for (int i = 0; i < resBytes.length; i++) {
      assertTrue(resBytes[i] == rBytes[i]);
    }
    assertEquals("incorrect sign", -1, result.signum());
  }
}