/*
* 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 Elena Semukhina
* @version $Revision$
*/
package org.apache.harmony.math.tests.java.math;
import dalvik.annotation.KnownFailure;
import dalvik.annotation.TestLevel;
import dalvik.annotation.TestTargetClass;
import dalvik.annotation.TestTargetNew;
import junit.framework.TestCase;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.math.RoundingMode;
@TestTargetClass(BigDecimal.class)
/**
* Class: java.math.BigDecimal
* Methods: movePointLeft, movePointRight, scale, setScale, unscaledValue *
*/
public class BigDecimalScaleOperationsTest extends TestCase {
/**
* Check the default scale
*/
@TestTargetNew(
level = TestLevel.PARTIAL_COMPLETE,
notes = "This is a complete subset of tests for scale method.",
method = "scale",
args = {}
)
public void testScaleDefault() {
String a = "1231212478987482988429808779810457634781384756794987";
int cScale = 0;
BigDecimal aNumber = new BigDecimal(new BigInteger(a));
assertTrue("incorrect scale", aNumber.scale() == cScale);
}
/**
* Check a negative scale
*/
@TestTargetNew(
level = TestLevel.PARTIAL_COMPLETE,
notes = "This is a complete subset of tests for scale method.",
method = "scale",
args = {}
)
public void testScaleNeg() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = -10;
int cScale = -10;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
assertTrue("incorrect scale", aNumber.scale() == cScale);
}
/**
* Check a positive scale
*/
@TestTargetNew(
level = TestLevel.PARTIAL_COMPLETE,
notes = "This is a complete subset of tests for scale method.",
method = "scale",
args = {}
)
public void testScalePos() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = 10;
int cScale = 10;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
assertTrue("incorrect scale", aNumber.scale() == cScale);
}
/**
* Check the zero scale
*/
@TestTargetNew(
level = TestLevel.PARTIAL_COMPLETE,
notes = "This is a complete subset of tests for scale method.",
method = "scale",
args = {}
)
public void testScaleZero() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = 0;
int cScale = 0;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
assertTrue("incorrect scale", aNumber.scale() == cScale);
}
/**
* Check the unscaled value
*/
@TestTargetNew(
level = TestLevel.COMPLETE,
notes = "",
method = "unscaledValue",
args = {}
)
public void testUnscaledValue() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = 100;
BigInteger bNumber = new BigInteger(a);
BigDecimal aNumber = new BigDecimal(bNumber, aScale);
assertTrue("incorrect unscaled value", aNumber.unscaledValue().equals(bNumber));
}
/**
* Set a greater new scale
*/
@TestTargetNew(
level = TestLevel.PARTIAL_COMPLETE,
notes = "This is a complete subset of tests for setScale method.",
method = "setScale",
args = {int.class}
)
public void testSetScaleGreater() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = 18;
int newScale = 28;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = aNumber.setScale(newScale);
assertTrue("incorrect scale", bNumber.scale() == newScale);
assertEquals("incorrect value", 0, bNumber.compareTo(aNumber));
}
/**
* Set a less new scale; this.scale == 8; newScale == 5.
*/
@TestTargetNew(
level = TestLevel.PARTIAL_COMPLETE,
notes = "This is a complete subset of tests for setScale method.",
method = "setScale",
args = {int.class}
)
public void testSetScaleLess() {
String a = "2.345726458768760000E+10";
int newScale = 5;
BigDecimal aNumber = new BigDecimal(a);
BigDecimal bNumber = aNumber.setScale(newScale);
assertTrue("incorrect scale", bNumber.scale() == newScale);
assertEquals("incorrect value", 0, bNumber.compareTo(aNumber));
}
/**
* Verify an exception when setting a new scale
*/
@TestTargetNew(
level = TestLevel.PARTIAL_COMPLETE,
notes = "This is a complete subset of tests for setScale method.",
method = "setScale",
args = {int.class}
)
public void testSetScaleException() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = 28;
int newScale = 18;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
try {
aNumber.setScale(newScale);
fail("ArithmeticException has not been caught");
} catch (ArithmeticException e) {
assertEquals("Improper exception message", "Rounding necessary", e.getMessage());
}
}
/**
* Set the same new scale
*/
@TestTargetNew(
level = TestLevel.PARTIAL_COMPLETE,
notes = "This is a complete subset of tests for setScale method.",
method = "setScale",
args = {int.class}
)
public void testSetScaleSame() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = 18;
int newScale = 18;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = aNumber.setScale(newScale);
assertTrue("incorrect scale", bNumber.scale() == newScale);
assertTrue("incorrect value", bNumber.equals(aNumber));
}
/**
* Set a new scale
*/
@TestTargetNew(
level = TestLevel.PARTIAL,
notes = "Exception checking missed.",
method = "setScale",
args = {int.class, int.class}
)
public void testSetScaleRoundUp() {
String a = "1231212478987482988429808779810457634781384756794987";
String b = "123121247898748298842980877981045763478139";
int aScale = 28;
int newScale = 18;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = aNumber.setScale(newScale, BigDecimal.ROUND_UP);
assertTrue("incorrect scale", bNumber.scale() == newScale);
assertTrue("incorrect value", bNumber.unscaledValue().toString().equals(b));
}
/**
* Set a new scale
*/
@TestTargetNew(
level = TestLevel.PARTIAL,
notes = "Exception checking missed.",
method = "setScale",
args = {int.class, int.class}
)
public void testSetScaleRoundDown() {
String a = "1231212478987482988429808779810457634781384756794987";
String b = "123121247898748298842980877981045763478138";
int aScale = 28;
int newScale = 18;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = aNumber.setScale(newScale, BigDecimal.ROUND_DOWN);
assertTrue("incorrect scale", bNumber.scale() == newScale);
assertTrue("incorrect value", bNumber.unscaledValue().toString().equals(b));
}
/**
* Set a new scale
*/
@TestTargetNew(
level = TestLevel.PARTIAL,
notes = "Exception checking missed.",
method = "setScale",
args = {int.class, int.class}
)
public void testSetScaleRoundCeiling() {
String a = "1231212478987482988429808779810457634781384756794987";
String b = "123121247898748298842980877981045763478139";
int aScale = 28;
int newScale = 18;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = aNumber.setScale(newScale, BigDecimal.ROUND_CEILING);
assertTrue("incorrect scale", bNumber.scale() == newScale);
assertTrue("incorrect value", bNumber.unscaledValue().toString().equals(b));
}
/**
* Set a new scale
*/
@TestTargetNew(
level = TestLevel.PARTIAL,
notes = "Exception checking missed.",
method = "setScale",
args = {int.class, int.class}
)
public void testSetScaleRoundFloor() {
String a = "1231212478987482988429808779810457634781384756794987";
String b = "123121247898748298842980877981045763478138";
int aScale = 28;
int newScale = 18;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = aNumber.setScale(newScale, BigDecimal.ROUND_FLOOR);
assertTrue("incorrect scale", bNumber.scale() == newScale);
assertTrue("incorrect value", bNumber.unscaledValue().toString().equals(b));
}
/**
* Set a new scale
*/
@TestTargetNew(
level = TestLevel.PARTIAL,
notes = "Exception checking missed.",
method = "setScale",
args = {int.class, int.class}
)
public void testSetScaleRoundHalfUp() {
String a = "1231212478987482988429808779810457634781384756794987";
String b = "123121247898748298842980877981045763478138";
int aScale = 28;
int newScale = 18;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = aNumber.setScale(newScale, BigDecimal.ROUND_HALF_UP);
assertTrue("incorrect scale", bNumber.scale() == newScale);
assertTrue("incorrect value", bNumber.unscaledValue().toString().equals(b));
}
/**
* Set a new scale
*/
@TestTargetNew(
level = TestLevel.PARTIAL,
notes = "Exception checking missed.",
method = "setScale",
args = {int.class, int.class}
)
public void testSetScaleRoundHalfDown() {
String a = "1231212478987482988429808779810457634781384756794987";
String b = "123121247898748298842980877981045763478138";
int aScale = 28;
int newScale = 18;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = aNumber.setScale(newScale, BigDecimal.ROUND_HALF_DOWN);
assertTrue("incorrect scale", bNumber.scale() == newScale);
assertTrue("incorrect value", bNumber.unscaledValue().toString().equals(b));
}
/**
* Set a new scale
*/
@TestTargetNew(
level = TestLevel.PARTIAL,
notes = "Exception checking missed.",
method = "setScale",
args = {int.class, int.class}
)
public void testSetScaleRoundHalfEven() {
String a = "1231212478987482988429808779810457634781384756794987";
String b = "123121247898748298842980877981045763478138";
int aScale = 28;
int newScale = 18;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = aNumber.setScale(newScale, BigDecimal.ROUND_HALF_EVEN);
assertTrue("incorrect scale", bNumber.scale() == newScale);
assertTrue("incorrect value", bNumber.unscaledValue().toString().equals(b));
}
/**
* SetScale(int, RoundingMode)
*/
@TestTargetNew(
level = TestLevel.PARTIAL,
notes = "Exception checking missed.",
method = "setScale",
args = {int.class, int.class}
)
public void testSetScaleIntRoundingMode() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = 28;
int newScale = 18;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal result = aNumber.setScale(newScale, RoundingMode.HALF_EVEN);
String res = "123121247898748298842980.877981045763478138";
int resScale = 18;
assertEquals("incorrect value", res, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* Move the decimal point to the left; the shift value is positive
*/
@TestTargetNew(
level = TestLevel.PARTIAL_COMPLETE,
method = "movePointLeft",
args = {int.class}
)
public void testMovePointLeftPos() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = 28;
int shift = 18;
int resScale = 46;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = aNumber.movePointLeft(shift);
assertTrue("incorrect scale", bNumber.scale() == resScale);
assertTrue("incorrect value", bNumber.unscaledValue().toString().equals(a));
}
/**
* Move the decimal point to the left; the shift value is positive
*/
@TestTargetNew(
level = TestLevel.PARTIAL_COMPLETE,
method = "movePointLeft",
args = {int.class}
)
public void testMovePointLeftNeg() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = 28;
int shift = -18;
int resScale = 10;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = aNumber.movePointLeft(shift);
assertTrue("incorrect scale", bNumber.scale() == resScale);
assertTrue("incorrect value", bNumber.unscaledValue().toString().equals(a));
}
@TestTargetNew(
level = TestLevel.PARTIAL_COMPLETE,
method = "movePointLeft",
args = {int.class}
)
public void testMovePointLeftEx() {
BigDecimal a = new BigDecimal("12345.6789012345678901234567890123456789");
BigDecimal res = a.movePointLeft(10);
assertEquals("incorrect scale", 44, res.scale());
assertEquals("incorrect value", "0.00000123456789012345678901234567890123456789", res.toString());
res = a.movePointLeft(-50);
assertEquals("incorrect scale", 0, res.scale());
assertEquals("incorrect value", "1234567890123456789012345678901234567890000000000000000", res.toString());
try {
res = a.movePointLeft(Integer.MAX_VALUE - 2);
// assertEquals("incorrect value", "0.0938025", res[1].toString());
fail("ArithmeticException is not thrown");
} catch (ArithmeticException e) {
// expected
}
}
/**
* Move the decimal point to the right; the shift value is positive
*/
@TestTargetNew(
level = TestLevel.PARTIAL_COMPLETE,
notes = "This is a complete subset of tests for movePointRight method.",
method = "movePointRight",
args = {int.class}
)
public void testMovePointRightPosGreater() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = 28;
int shift = 18;
int resScale = 10;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = aNumber.movePointRight(shift);
assertTrue("incorrect scale", bNumber.scale() == resScale);
assertTrue("incorrect value", bNumber.unscaledValue().toString().equals(a));
}
/**
* Move the decimal point to the right; the shift value is positive
*/
@TestTargetNew(
level = TestLevel.PARTIAL_COMPLETE,
notes = "This is a complete subset of tests for movePointRight method.",
method = "movePointRight",
args = {int.class}
)
public void testMovePointRightPosLess() {
String a = "1231212478987482988429808779810457634781384756794987";
String b = "123121247898748298842980877981045763478138475679498700";
int aScale = 28;
int shift = 30;
int resScale = 0;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = aNumber.movePointRight(shift);
assertTrue("incorrect scale", bNumber.scale() == resScale);
assertTrue("incorrect value", bNumber.unscaledValue().toString().equals(b));
}
/**
* Move the decimal point to the right; the shift value is positive
*/
@TestTargetNew(
level = TestLevel.PARTIAL_COMPLETE,
notes = "This is a complete subset of tests for movePointRight method.",
method = "movePointRight",
args = {int.class}
)
public void testMovePointRightNeg() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = 28;
int shift = -18;
int resScale = 46;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = aNumber.movePointRight(shift);
assertTrue("incorrect scale", bNumber.scale() == resScale);
assertTrue("incorrect value", bNumber.unscaledValue().toString().equals(a));
}
/**
* Move the decimal point to the right when the scale overflows
*/
@TestTargetNew(
level = TestLevel.PARTIAL_COMPLETE,
notes = "This is a complete subset of tests for movePointRight method.",
method = "movePointRight",
args = {int.class}
)
public void testMovePointRightException() {
String a = "12312124789874829887348723648726347429808779810457634781384756794987";
int aScale = Integer.MAX_VALUE; //2147483647
int shift = -18;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
try {
aNumber.movePointRight(shift);
fail("ArithmeticException has not been caught");
} catch (ArithmeticException e) {
assertEquals("Improper exception message", "Underflow", e.getMessage());
}
}
@TestTargetNew(
level = TestLevel.PARTIAL_COMPLETE,
method = "movePointRight",
args = {int.class}
)
public void testMovePointRightEx() {
BigDecimal a = new BigDecimal("12345.6789012345678901234567890123456789");
BigDecimal res = a.movePointRight(10);
assertEquals("incorrect scale", 24, res.scale());
assertEquals("incorrect value", "123456789012345.678901234567890123456789", res.toString());
res = a.movePointRight(-50);
assertEquals("incorrect scale", 84, res.scale());
assertEquals("incorrect value", "1.23456789012345678901234567890123456789E-46", res.toString());
try {
res = a.movePointRight(Integer.MIN_VALUE + 2);
fail("ArithmeticException is not thrown");
} catch (ArithmeticException e) {
// expected
}
}
@TestTargetNew(
level = TestLevel.PARTIAL_COMPLETE,
method = "movePointRight",
args = {int.class}
)
@KnownFailure("Throws OutOfMemoryError instead of ArithmeticException!")
public void testMovePointRightEx2() {
BigDecimal a = new BigDecimal("123456789012345678901234567890123456789E25");
try {
BigDecimal res = a.movePointRight(Integer.MAX_VALUE - 2);
fail("ArithmeticException is not thrown");
} catch (ArithmeticException e) {
// expected
}
}
/**
* scaleByPowerOfTen(int n)
*/
@TestTargetNew(
level = TestLevel.COMPLETE,
method = "scaleByPowerOfTen",
args = {int.class}
)
public void testScaleByPowerOfTenEx() {
BigDecimal a = new BigDecimal("12345.6789012345678901234567890123456789");
BigDecimal res = a.movePointRight(10);
assertEquals("incorrect scale", 24, res.scale());
assertEquals("incorrect value", "123456789012345.678901234567890123456789", res.toString());
res = a.scaleByPowerOfTen(-50);
assertEquals("incorrect scale", 84, res.scale());
assertEquals("incorrect value", "1.23456789012345678901234567890123456789E-46", res.toString());
res = a.scaleByPowerOfTen(50);
assertEquals("incorrect scale", -16, res.scale());
assertEquals("incorrect value", "1.23456789012345678901234567890123456789E+54", res.toString());
try {
res = a.scaleByPowerOfTen(Integer.MIN_VALUE + 2);
fail("ArithmeticException is not thrown");
} catch (ArithmeticException e) {
// expected
}
a = new BigDecimal("123456789012345678901234567890123456789E25");
try {
res = a.scaleByPowerOfTen(Integer.MAX_VALUE - 2);
fail("ArithmeticException is not thrown");
} catch (ArithmeticException e) {
// expected
}
}
/**
* precision()
*/
@TestTargetNew(
level = TestLevel.COMPLETE,
notes = "",
method = "precision",
args = {}
)
public void testPrecision() {
String a = "12312124789874829887348723648726347429808779810457634781384756794987";
int aScale = 14;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
int prec = aNumber.precision();
assertEquals(68, prec);
}
/// ANDROID ADDED
/**
* check that setScale with a scale greater to the existing scale does not
* change the value.
*/
@TestTargetNew(
level = TestLevel.COMPLETE,
notes = "",
method = "precision",
args = {}
)
public void testSetScale() {
BigDecimal x1 = new BigDecimal(1.23400);
BigDecimal x2 = x1.setScale(75);
assertEquals(0, x1.compareTo(x2));
assertEquals(0, x2.compareTo(x1));
x1.precision();
assertEquals(0, x1.compareTo(x2));
assertEquals(0, x2.compareTo(x1));
x2.precision();
assertEquals(0, x1.compareTo(x2));
assertEquals(0, x2.compareTo(x1));
}
}
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