motiejus
/
jgit
1
Fork 0
Code Releases Activity

Move TestRng to our JUnit helper package 

Other test suites may find this useful, especially when trying
to defeat the pack file compression with random data files.

Change-Id: Ic00a4ac626af7a1c94d18ee99305e295b267b1a3
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
This commit is contained in:
Shawn O. Pearce 2010-01-05 19:14:48 -08:00
parent 15e2b45a81
commit f88cac039e
2 changed files with 20 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
org.eclipse.jgit.test/tst/org/eclipse/jgit/util/TestRng.java → org.eclipse.jgit.junit/src/org/eclipse/jgit/junit/TestRng.java
View File

@ -1,5 +1,5 @@
/*
* Copyright (C) 2008, Google Inc.
* Copyright (C) 2008-2010, Google Inc.
* and other copyright owners as documented in the project's IP log.
*
* This program and the accompanying materials are made available
@ -41,18 +41,31 @@
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.eclipse.jgit.util;
package org.eclipse.jgit.junit;
/** Toy RNG to ensure we get predictable numbers during unit tests. */
public class TestRng {
private int next;
/**
* Create a new random number generator, seeded by a string.
*
* @param seed
* seed to bootstrap, usually this is the test method name.
*/
public TestRng(final String seed) {
next = 0;
for (int i = 0; i < seed.length(); i++)
next = next * 11 + seed.charAt(i);
}
/**
* Get the next {@code cnt} bytes of random data.
*
* @param cnt
* number of random bytes to produce.
* @return array of {@code cnt} randomly generated bytes.
*/
public byte[] nextBytes(final int cnt) {
final byte[] r = new byte[cnt];
for (int i = 0; i < cnt; i++)
@ -60,6 +73,9 @@ public byte[] nextBytes(final int cnt) {
return r;
}
/**
* @return the next random integer.
*/
public int nextInt() {
next = next * 1103515245 + 12345;
return next;

2
org.eclipse.jgit.test/tst/org/eclipse/jgit/util/TemporaryBufferTest.java
View File

@ -48,6 +48,8 @@
import java.io.IOException;
import java.util.Arrays;
import org.eclipse.jgit.junit.TestRng;
import junit.framework.TestCase;
public class TemporaryBufferTest extends TestCase {