/*
 * 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.core.client.GWT;
import com.google.gwt.emultest.java.util.EmulTestBase;

import java.math.BigDecimal;
import java.math.BigInteger;
import java.math.MathContext;
import java.math.RoundingMode;

/**
 * Class: java.math.BigDecimal Methods: abs, compareTo, equals, hashCode, max,
 * min, negate, signum.
 */
public class BigDecimalCompareTest extends EmulTestBase {

  /**
   * Abs(MathContext) of a negative BigDecimal.
   */
  public void testAbsMathContextNeg() {
    String a = "-123809648392384754573567356745735.63567890295784902768787678287E+21";
    BigDecimal aNumber = new BigDecimal(a);
    int precision = 15;
    RoundingMode rm = RoundingMode.HALF_DOWN;
    MathContext mc = new MathContext(precision, rm);
    String result = "1.23809648392385E+53";
    int resScale = -39;
    BigDecimal res = aNumber.abs(mc);
    assertEquals("incorrect value", result, res.toString());
    assertEquals("incorrect scale", resScale, res.scale());
  }

  /**
   * Abs(MathContext) of a positive BigDecimal.
   */
  public void testAbsMathContextPos() {
    String a = "123809648392384754573567356745735.63567890295784902768787678287E+21";
    BigDecimal aNumber = new BigDecimal(a);
    int precision = 41;
    RoundingMode rm = RoundingMode.HALF_EVEN;
    MathContext mc = new MathContext(precision, rm);
    String result = "1.2380964839238475457356735674573563567890E+53";
    int resScale = -13;
    BigDecimal res = aNumber.abs(mc);
    assertEquals("incorrect value", result, res.toString());
    assertEquals("incorrect scale", resScale, res.scale());
  }

  /**
   * Abs() of a negative BigDecimal.
   */
  public void testAbsNeg() {
    String a = "-123809648392384754573567356745735.63567890295784902768787678287E+21";
    BigDecimal aNumber = new BigDecimal(a);
    String result = "123809648392384754573567356745735635678902957849027687.87678287";
    assertEquals("incorrect value", result, aNumber.abs().toString());
  }

  /**
   * Abs() of a positive BigDecimal.
   */
  public void testAbsPos() {
    String a = "123809648392384754573567356745735.63567890295784902768787678287E+21";
    BigDecimal aNumber = new BigDecimal(a);
    String result = "123809648392384754573567356745735635678902957849027687.87678287";
    assertEquals("incorrect value", result, aNumber.abs().toString());
  }

  /**
   * Compare to a number of an equal scale.
   */
  public void testCompareEqualScale1() {
    String a = "12380964839238475457356735674573563567890295784902768787678287";
    int aScale = 18;
    String b = "4573563567890295784902768787678287";
    int bScale = 18;
    BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
    BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
    int result = 1;
    assertEquals("incorrect result", result, aNumber.compareTo(bNumber));
  }

  /**
   * Compare to a number of an equal scale.
   */
  public void testCompareEqualScale2() {
    String a = "12380964839238475457356735674573563567890295784902768787678287";
    int aScale = 18;
    String b = "4573563923487289357829759278282992758247567890295784902768787678287";
    int bScale = 18;
    BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
    BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
    int result = -1;
    assertEquals("incorrect result", result, aNumber.compareTo(bNumber));
  }

  /**
   * Compare to a number of an greater scale.
   */
  public void testCompareGreaterScale1() {
    String a = "12380964839238475457356735674573563567890295784902768787678287";
    int aScale = 28;
    String b = "4573563567890295784902768787678287";
    int bScale = 18;
    BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
    BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
    int result = 1;
    assertEquals("incorrect result", result, aNumber.compareTo(bNumber));
  }

  /**
   * Compare to a number of an greater scale.
   */
  public void testCompareGreaterScale2() {
    String a = "12380964839238475457356735674573563567890295784902768787678287";
    int aScale = 48;
    String b = "4573563567890295784902768787678287";
    int bScale = 2;
    BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
    BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
    int result = -1;
    assertEquals("incorrect result", result, aNumber.compareTo(bNumber));
  }

  /**
   * Compare to a number of an less scale.
   */
  public void testCompareLessScale1() {
    String a = "12380964839238475457356735674573563567890295784902768787678287";
    int aScale = 18;
    String b = "4573563567890295784902768787678287";
    int bScale = 28;
    BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
    BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
    int result = 1;
    assertEquals("incorrect result", result, aNumber.compareTo(bNumber));
  }

  /**
   * Compare to a number of an less scale.
   */
  public void testCompareLessScale2() {
    String a = "12380964839238475457356735674573";
    int aScale = 36;
    String b = "45735635948573894578349572001798379183767890295784902768787678287";
    int bScale = 48;
    BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
    BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
    int result = -1;
    assertEquals("incorrect result", result, aNumber.compareTo(bNumber));
  }

  /**
   * equals() for equal BigDecimals.
   */
  public void testEqualsEqual() {
    String a = "92948782094488478231212478987482988429808779810457634781384756794987";
    int aScale = -24;
    String b = "92948782094488478231212478987482988429808779810457634781384756794987";
    int bScale = -24;
    BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
    BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
    assertEquals(aNumber, bNumber);
  }

  /**
   * equals() for equal BigDecimals.
   */
  public void testEqualsNull() {
    String a = "92948782094488478231212478987482988429808779810457634781384756794987";
    int aScale = -24;
    BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
    assertFalse(aNumber.equals(null));
  }

  /**
   * Equals() for unequal BigDecimals.
   */
  public void testEqualsUnequal1() {
    String a = "92948782094488478231212478987482988429808779810457634781384756794987";
    int aScale = -24;
    String b = "7472334223847623782375469293018787918347987234564568";
    int bScale = 13;
    BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
    BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
    assertFalse(aNumber.equals(bNumber));
  }

  /**
   * Equals() for unequal BigDecimals.
   */
  public void testEqualsUnequal2() {
    String a = "92948782094488478231212478987482988429808779810457634781384756794987";
    int aScale = -24;
    String b = "92948782094488478231212478987482988429808779810457634781384756794987";
    int bScale = 13;
    BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
    BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
    assertFalse(aNumber.equals(bNumber));
  }

  /**
   * Equals() for unequal BigDecimals.
   */
  public void testEqualsUnequal3() {
    String a = "92948782094488478231212478987482988429808779810457634781384756794987";
    int aScale = -24;
    String b = "92948782094488478231212478987482988429808779810457634781384756794987";
    BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
    assertFalse(aNumber.equals(b));
  }

  /**
   * Test identical fraction values with different scales.
   * http://code.google.com/p/google-web-toolkit/issues/detail?id=7834
   */
  public void testFractionScale() {
    BigDecimal a = new BigDecimal("0.02");
    BigDecimal b = new BigDecimal("0.02000");
    assertEquals(0, a.compareTo(b));

    BigDecimal a1 = new BigDecimal("0.029900000000000003");
    BigDecimal a2 = new BigDecimal("0.0001");
    a = a1.add(a2);
    // a is 0.030000000000000003 (0.029900000000000003 + 0.0001)
    b = new BigDecimal("0.03990");
    assertEquals(-1, a.compareTo(b));
  }

  /**
   * hashCode() for equal BigDecimals.
   */
  public void testHashCodeEqual() {
    String a = "92948782094488478231212478987482988429808779810457634781384756794987";
    int aScale = -24;
    String b = "92948782094488478231212478987482988429808779810457634781384756794987";
    int bScale = -24;
    BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
    BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
    assertEquals("incorrect value", aNumber.hashCode(), bNumber.hashCode());
  }

  /**
   * hashCode() for unequal BigDecimals.
   */
  public void testHashCodeUnequal() {
    String a = "8478231212478987482988429808779810457634781384756794987";
    int aScale = 41;
    String b = "92948782094488478231212478987482988429808779810457634781384756794987";
    int bScale = -24;
    BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
    BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
    assertTrue("incorrect value", aNumber.hashCode() != bNumber.hashCode());
  }

  /**
   * max() for equal BigDecimals.
   */
  public void testMaxEqual() {
    String a = "8478231212478987482988429808779810457634781384756794987";
    int aScale = 41;
    String b = "8478231212478987482988429808779810457634781384756794987";
    int bScale = 41;
    String c = "8478231212478987482988429808779810457634781384756794987";
    int cScale = 41;
    BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
    BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
    BigDecimal cNumber = new BigDecimal(new BigInteger(c), cScale);
    assertEquals("incorrect value", cNumber, aNumber.max(bNumber));
  }

  /**
   * max() for unequal BigDecimals.
   */
  public void testMaxUnequal1() {
    String a = "92948782094488478231212478987482988429808779810457634781384756794987";
    int aScale = 24;
    String b = "92948782094488478231212478987482988429808779810457634781384756794987";
    int bScale = 41;
    String c = "92948782094488478231212478987482988429808779810457634781384756794987";
    int cScale = 24;
    BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
    BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
    BigDecimal cNumber = new BigDecimal(new BigInteger(c), cScale);
    assertEquals("incorrect value", cNumber, aNumber.max(bNumber));
  }

  /**
   * max() for unequal BigDecimals.
   */
  public void testMaxUnequal2() {
    String a = "92948782094488478231212478987482988429808779810457634781384756794987";
    int aScale = 41;
    String b = "94488478231212478987482988429808779810457634781384756794987";
    int bScale = 41;
    String c = "92948782094488478231212478987482988429808779810457634781384756794987";
    int cScale = 41;
    BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
    BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
    BigDecimal cNumber = new BigDecimal(new BigInteger(c), cScale);
    assertEquals("incorrect value", cNumber, aNumber.max(bNumber));
  }

  /**
   * min() for equal BigDecimals.
   */
  public void testMinEqual() {
    String a = "8478231212478987482988429808779810457634781384756794987";
    int aScale = 41;
    String b = "8478231212478987482988429808779810457634781384756794987";
    int bScale = 41;
    String c = "8478231212478987482988429808779810457634781384756794987";
    int cScale = 41;
    BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
    BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
    BigDecimal cNumber = new BigDecimal(new BigInteger(c), cScale);
    assertEquals("incorrect value", cNumber, aNumber.min(bNumber));
  }

  /**
   * min() for unequal BigDecimals.
   */
  public void testMinUnequal1() {
    String a = "92948782094488478231212478987482988429808779810457634781384756794987";
    int aScale = 24;
    String b = "92948782094488478231212478987482988429808779810457634781384756794987";
    int bScale = 41;
    String c = "92948782094488478231212478987482988429808779810457634781384756794987";
    int cScale = 41;
    BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
    BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
    BigDecimal cNumber = new BigDecimal(new BigInteger(c), cScale);
    assertEquals("incorrect value", cNumber, aNumber.min(bNumber));
  }

  /**
   * min() for unequal BigDecimals.
   */
  public void testMinUnequal2() {
    String a = "92948782094488478231212478987482988429808779810457634781384756794987";
    int aScale = 41;
    String b = "94488478231212478987482988429808779810457634781384756794987";
    int bScale = 41;
    String c = "94488478231212478987482988429808779810457634781384756794987";
    int cScale = 41;
    BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
    BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
    BigDecimal cNumber = new BigDecimal(new BigInteger(c), cScale);
    assertEquals("incorrect value", cNumber, aNumber.min(bNumber));
  }

  /**
   * negate(MathContext) for a negative BigDecimal.
   */
  public void testNegateMathContextNegative() {
    if (!GWT.isScript()) {
      // OpenJDK fails this test, so for now we only run it in Production Mode
      return;
    }
    String a = "-92948782094488478231212478987482988429808779810457634781384756794987";
    int aScale = 49;
    int precision = 46;
    RoundingMode rm = RoundingMode.CEILING;
    MathContext mc = new MathContext(precision, rm);
    String c = "9294878209448847823.121247898748298842980877981";
    int cScale = 27;
    BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
    BigDecimal res = aNumber.negate(mc);
    assertEquals("incorrect value", c, res.toString());
    assertEquals("incorrect scale", cScale, res.scale());
  }

  /**
   * negate(MathContext) for a positive BigDecimal.
   */
  public void testNegateMathContextPositive() {
    if (!GWT.isScript()) {
      // OpenJDK fails this test, so for now we only run it in Production Mode
      return;
    }
    String a = "92948782094488478231212478987482988429808779810457634781384756794987";
    int aScale = 41;
    int precision = 37;
    RoundingMode rm = RoundingMode.FLOOR;
    MathContext mc = new MathContext(precision, rm);
    String c = "-929487820944884782312124789.8748298842";
    int cScale = 10;
    BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
    BigDecimal res = aNumber.negate(mc);
    assertEquals("incorrect value", c, res.toString());
    assertEquals("incorrect scale", cScale, res.scale());
  }

  /**
   * negate() for a negative BigDecimal.
   */
  public void testNegateNegative() {
    String a = "-92948782094488478231212478987482988429808779810457634781384756794987";
    int aScale = 41;
    String c = "92948782094488478231212478987482988429808779810457634781384756794987";
    int cScale = 41;
    BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
    BigDecimal cNumber = new BigDecimal(new BigInteger(c), cScale);
    assertEquals("incorrect value", cNumber, aNumber.negate());
  }

  /**
   * negate() for a positive BigDecimal.
   */
  public void testNegatePositive() {
    String a = "92948782094488478231212478987482988429808779810457634781384756794987";
    int aScale = 41;
    String c = "-92948782094488478231212478987482988429808779810457634781384756794987";
    int cScale = 41;
    BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
    BigDecimal cNumber = new BigDecimal(new BigInteger(c), cScale);
    assertEquals("incorrect value", cNumber, aNumber.negate());
  }

  /**
   * plus(MathContext) for a negative BigDecimal.
   */
  public void testPlusMathContextNegative() {
    String a = "-92948782094488478231212478987482988429808779810457634781384756794987";
    int aScale = 49;
    int precision = 46;
    RoundingMode rm = RoundingMode.CEILING;
    MathContext mc = new MathContext(precision, rm);
    String c = "-9294878209448847823.121247898748298842980877981";
    int cScale = 27;
    BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
    BigDecimal res = aNumber.plus(mc);
    assertEquals("incorrect value", c, res.toString());
    assertEquals("incorrect scale", cScale, res.scale());
  }

  /**
   * plus(MathContext) for a positive BigDecimal.
   */
  public void testPlusMathContextPositive() {
    String a = "92948782094488478231212478987482988429808779810457634781384756794987";
    int aScale = 41;
    int precision = 37;
    RoundingMode rm = RoundingMode.FLOOR;
    MathContext mc = new MathContext(precision, rm);
    String c = "929487820944884782312124789.8748298842";
    int cScale = 10;
    BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
    BigDecimal res = aNumber.plus(mc);
    assertEquals("incorrect value", c, res.toString());
    assertEquals("incorrect scale", cScale, res.scale());
  }

  /**
   * plus() for a negative BigDecimal.
   */
  public void testPlusNegative() {
    String a = "-92948782094488478231212478987482988429808779810457634781384756794987";
    int aScale = 41;
    String c = "-92948782094488478231212478987482988429808779810457634781384756794987";
    int cScale = 41;
    BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
    BigDecimal cNumber = new BigDecimal(new BigInteger(c), cScale);
    assertEquals("incorrect value", cNumber, aNumber.plus());
  }

  /**
   * plus() for a positive BigDecimal.
   */
  public void testPlusPositive() {
    String a = "92948782094488478231212478987482988429808779810457634781384756794987";
    int aScale = 41;
    String c = "92948782094488478231212478987482988429808779810457634781384756794987";
    int cScale = 41;
    BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
    BigDecimal cNumber = new BigDecimal(new BigInteger(c), cScale);
    assertEquals("incorrect value", cNumber, aNumber.plus());
  }

  /**
   * signum() for a negative BigDecimal.
   */
  public void testSignumNegative() {
    String a = "-92948782094488478231212478987482988429808779810457634781384756794987";
    int aScale = 41;
    BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
    assertEquals("incorrect value", -1, aNumber.signum());
  }

  /**
   * signum() for a positive BigDecimal.
   */
  public void testSignumPositive() {
    String a = "92948782094488478231212478987482988429808779810457634781384756794987";
    int aScale = 41;
    BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
    assertEquals("incorrect value", 1, aNumber.signum());
  }

  /**
   * signum() for zero.
   */
  public void testSignumZero() {
    String a = "0";
    int aScale = 41;
    BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
    assertEquals("incorrect value", 0, aNumber.signum());
  }
}