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Let's turn this into an actual test.

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git-svn-id: https://samskivert.googlecode.com/svn/trunk@2812 6335cc39-0255-0410-8fd6-9bcaacd3b74c
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samskivert
2010-08-27 05:03:45 +00:00
parent 1002d68495
commit bd61c7a609
1 changed files with 30 additions and 26 deletions
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src/test/java/com/samskivert/util/ArrayUtilTest.java
+30 -26
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@@ -20,6 +20,8 @@
package com.samskivert.util;
import java.util.Arrays;
import org.junit.*;
import static org.junit.Assert.*;
@@ -37,119 +39,121 @@ public class ArrayUtilTest
int[] values = new int[] { 0 };
int[] work = values.clone();
ArrayUtil.reverse(work);
log.info("reverse: " + StringUtil.toString(work));
assertEquals("(0)", StringUtil.toString(work));
values = new int[] { 0, 1, 2 };
work = values.clone();
ArrayUtil.reverse(work);
log.info("reverse: " + StringUtil.toString(work));
assertEquals("(2, 1, 0)", StringUtil.toString(work));
work = values.clone();
ArrayUtil.reverse(work, 0, 2);
log.info("reverse first-half: " + StringUtil.toString(work));
assertEquals("(1, 0, 2)", StringUtil.toString(work));
work = values.clone();
ArrayUtil.reverse(work, 1, 2);
log.info("reverse second-half: " + StringUtil.toString(work));
assertEquals("(0, 2, 1)", StringUtil.toString(work));
values = new int[] { 0, 1, 2, 3, 4 };
work = values.clone();
ArrayUtil.reverse(work, 1, 3);
log.info("reverse middle: " + StringUtil.toString(work));
assertEquals("(0, 3, 2, 1, 4)", StringUtil.toString(work));
values = new int[] { 0, 1, 2, 3 };
work = values.clone();
ArrayUtil.reverse(work);
log.info("reverse even: " + StringUtil.toString(work));
assertEquals("(3, 2, 1, 0)", StringUtil.toString(work));
// test shuffling two elements
values = new int[] { 0, 1 };
work = values.clone();
ArrayUtil.shuffle(work, 0, 1);
log.info("first-half shuffle: " + StringUtil.toString(work));
assertEquals("(0, 1)", StringUtil.toString(work));
work = values.clone();
ArrayUtil.shuffle(work, 1, 1);
log.info("second-half shuffle: " + StringUtil.toString(work));
assertEquals("(0, 1)", StringUtil.toString(work));
work = values.clone();
ArrayUtil.shuffle(work);
log.info("full shuffle: " + StringUtil.toString(work));
Arrays.sort(work); // return them to canonical order
assertEquals("(0, 1)", StringUtil.toString(work));
// test shuffling three elements
values = new int[] { 0, 1, 2 };
work = values.clone();
ArrayUtil.shuffle(work, 0, 2);
log.info("first-half shuffle: " + StringUtil.toString(work));
assertTrue(StringUtil.toString(work).endsWith(", 2)"));
work = values.clone();
ArrayUtil.shuffle(work, 1, 2);
log.info("second-half shuffle: " + StringUtil.toString(work));
assertTrue(StringUtil.toString(work).startsWith("(0, "));
work = values.clone();
ArrayUtil.shuffle(work);
log.info("full shuffle: " + StringUtil.toString(work));
Arrays.sort(work); // return them to canonical order
assertEquals("(0, 1, 2)", StringUtil.toString(work));
// test shuffling ten elements
values = new int[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
work = values.clone();
ArrayUtil.shuffle(work, 0, 5);
log.info("first-half shuffle: " + StringUtil.toString(work));
assertTrue(StringUtil.toString(work).endsWith(", 5, 6, 7, 8, 9)"));
work = values.clone();
ArrayUtil.shuffle(work, 5, 5);
log.info("second-half shuffle: " + StringUtil.toString(work));
assertTrue(StringUtil.toString(work).startsWith("(0, 1, 2, 3, 4, "));
work = values.clone();
ArrayUtil.shuffle(work);
log.info("full shuffle: " + StringUtil.toString(work));
Arrays.sort(work); // return them to canonical order
assertEquals("(0, 1, 2, 3, 4, 5, 6, 7, 8, 9)", StringUtil.toString(work));
// test splicing with simple truncate beyond offset
values = new int[] { 0, 1, 2 };
work = values.clone();
work = ArrayUtil.splice(work, 0);
log.info("splice truncate 0: " + StringUtil.toString(work));
assertEquals("()", StringUtil.toString(work));
work = values.clone();
work = ArrayUtil.splice(work, 1);
log.info("splice truncate 1: " + StringUtil.toString(work));
assertEquals("(0)", StringUtil.toString(work));
work = values.clone();
work = ArrayUtil.splice(work, 2);
log.info("splice truncate 2: " + StringUtil.toString(work));
assertEquals("(0, 1)", StringUtil.toString(work));
values = new int[] { 0 };
work = values.clone();
work = ArrayUtil.splice(work, 0);
log.info("single element splice truncate 0: " +
StringUtil.toString(work));
assertEquals("()", StringUtil.toString(work));
// test splicing out a single element
values = new int[] { 0, 1, 2 };
work = values.clone();
work = ArrayUtil.splice(work, 0, 1);
log.info("splice concat 0, 1: " + StringUtil.toString(work));
assertEquals("(1, 2)", StringUtil.toString(work));
work = values.clone();
work = ArrayUtil.splice(work, 1, 1);
log.info("splice concat 1, 1: " + StringUtil.toString(work));
assertEquals("(0, 2)", StringUtil.toString(work));
work = values.clone();
work = ArrayUtil.splice(work, 2, 1);
log.info("splice concat 2, 1: " + StringUtil.toString(work));
assertEquals("(0, 1)", StringUtil.toString(work));
// test splicing out two elements
values = new int[] { 0, 1, 2, 3 };
work = values.clone();
work = ArrayUtil.splice(work, 0, 2);
log.info("splice concat 0, 2: " + StringUtil.toString(work));
assertEquals("(2, 3)", StringUtil.toString(work));
work = values.clone();
work = ArrayUtil.splice(work, 1, 2);
log.info("splice concat 1, 2: " + StringUtil.toString(work));
assertEquals("(0, 3)", StringUtil.toString(work));
work = values.clone();
work = ArrayUtil.splice(work, 2, 2);
log.info("splice concat 2, 2: " + StringUtil.toString(work));
assertEquals("(0, 1)", StringUtil.toString(work));
}
}