jtulach@184
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package api;
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jtulach@184
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jtulach@184
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import junit.framework.*;
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import java.util.*;
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jtulach@184
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jtulach@184
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public class ArithmeticaCompatibilityTest extends TestCase {
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public ArithmeticaCompatibilityTest(String name) {
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super(name);
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}
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private static final class CountingSubclass extends Arithmetica {
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int countSumTwo;
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int countSumAll;
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int countSumRange;
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@Override
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public int sumAll(int... numbers) {
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countSumAll++;
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return super.sumAll(numbers);
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}
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@Override
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public int sumRange(int from, int to) {
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countSumRange++;
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return super.sumRange(from, to);
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}
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@Override
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public int sumTwo(int one, int second) {
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countSumTwo++;
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return super.sumTwo(one, second);
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}
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} // end of CountingSubclass
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private static final class CountingOldSubclass extends OldArithmetica1 {
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int countSumTwo;
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int countSumAll;
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int countSumRange;
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@Override
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public int sumAll(int... numbers) {
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countSumAll++;
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return super.sumAll(numbers);
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}
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@Override
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public int sumRange(int from, int to) {
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countSumRange++;
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return super.sumRange(from, to);
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}
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@Override
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public int sumTwo(int one, int second) {
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countSumTwo++;
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return super.sumTwo(one, second);
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}
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} // end of CountingSubclass
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// BEGIN: total.rewrite.tests
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public void testRandomCheck () throws Exception {
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long seed = System.currentTimeMillis();
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try {
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CountingSubclass now = new CountingSubclass();
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CountingOldSubclass old = new CountingOldSubclass();
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compare(now, old, seed);
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assertEquals(
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"Verify amount calls to of sumRange is the same",
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now.countSumRange, old.countSumRange
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);
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assertEquals(
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"Verify amount calls to of sumAll is the same",
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now.countSumAll, old.countSumAll
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);
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assertEquals(
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"Verify amount calls to of sumTwo is the same",
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now.countSumTwo, old.countSumTwo
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);
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} catch (AssertionFailedError ex) {
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IllegalStateException n = new IllegalStateException (
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"Seed: " + seed + "\n" + ex.getMessage ()
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);
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n.initCause(ex);
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throw n;
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} catch (Exception ex) {
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IllegalStateException n = new IllegalStateException (
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"Seed: " + seed + "\n" + ex.getMessage ()
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);
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n.initCause(ex);
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throw n;
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}
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}
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public void testSimulateOKRunOn1208120436947() throws Exception {
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CountingSubclass now = new CountingSubclass();
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CountingOldSubclass old = new CountingOldSubclass();
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compare(now, old, 1208120436947L);
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assertEquals(
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"Verify amount of calls to sumRange is the same",
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now.countSumRange, old.countSumRange
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);
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assertEquals(
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"Verify amount of calls to sumAll is the same",
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now.countSumAll, old.countSumAll
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);
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assertEquals(
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"Verify amount of calls to sumTwo is the same",
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now.countSumTwo, old.countSumTwo
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);
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}
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public void testSimulateFailureOn1208120628821() throws Exception {
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CountingSubclass now = new CountingSubclass();
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CountingOldSubclass old = new CountingOldSubclass();
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compare(now, old, 1208120628821L);
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assertEquals(
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"Verify amount of calls to sumRange is the same",
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now.countSumRange, old.countSumRange
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);
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assertEquals(
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"Verify amount of calls to sumAll is the same",
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now.countSumAll, old.countSumAll
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);
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assertEquals(
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"Verify amount of calls to sumTwo is the same",
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now.countSumTwo, old.countSumTwo
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);
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}
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// END: total.rewrite.tests
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// BEGIN: total.rewrite.compare
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private void compare (Arithmetica now, OldArithmetica1 old, long seed)
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throws Exception {
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java.util.Random r = new java.util.Random (seed);
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for (int loop = 0; loop < r.nextInt(5); loop++) {
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int operation = r.nextInt(3);
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switch (operation) {
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case 0: { // sumTwo
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int a1 = r.nextInt(100);
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int a2 = r.nextInt(100);
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int resNow = now.sumTwo(a1, a2);
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int resOld = old.sumTwo(a1, a2);
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assertEquals("sumTwo results are equal", resNow, resOld);
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break;
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}
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case 1: { // sumArray
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int[] arr = new int[r.nextInt(100)];
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for (int i = 0; i < arr.length; i++) {
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arr[i] = r.nextInt(100);
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}
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int resNow = now.sumAll(arr);
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int resOld = old.sumAll(arr);
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assertEquals("sumArray results are equal", resNow, resOld);
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break;
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}
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case 2: { // sumRange
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int a1 = r.nextInt(100);
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int a2 = r.nextInt(100);
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int resNow = now.sumRange(a1, a1 + a2);
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int resOld = old.sumRange(a1, a1 + a2);
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assertEquals("sumRange results are equal", resNow, resOld);
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break;
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}
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}
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}
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}
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// END: total.rewrite.compare
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// BEGIN: total.rewrite.oldimpl
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/** This is a copy of the implementation of Arithmetica from version 1.0 */
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static class OldArithmetica1 {
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public int sumTwo(int one, int second) {
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return one + second;
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}
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public int sumAll(int... numbers) {
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if (numbers.length == 0) {
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return 0;
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}
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int sum = numbers[0];
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for (int i = 1; i < numbers.length; i++) {
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sum = sumTwo(sum, numbers[i]);
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}
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return sum;
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}
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public int sumRange(int from, int to) {
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int len = to - from;
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int[] array = new int[len + 1];
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for (int i = 0; i <= len; i++) {
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array[i] = from + i;
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}
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return sumAll(array);
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}
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}
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// END: total.rewrite.oldimpl
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}
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