From f88cac039eaa834859b2b2e748c0d8bb0ad82e67 Mon Sep 17 00:00:00 2001
From: "Shawn O. Pearce" <spearce@spearce.org>
Date: Tue, 5 Jan 2010 19:14:48 -0800
Subject: [PATCH] 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>
---
.../src/org/eclipse/jgit/junit}/TestRng.java | 20 +++++++++++++++++--
.../jgit/util/TemporaryBufferTest.java | 2 ++
2 files changed, 20 insertions(+), 2 deletions(-)
rename {org.eclipse.jgit.test/tst/org/eclipse/jgit/util => org.eclipse.jgit.junit/src/org/eclipse/jgit/junit}/TestRng.java (83%)
diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/util/TestRng.java b/org.eclipse.jgit.junit/src/org/eclipse/jgit/junit/TestRng.java
similarity index 83%
rename from org.eclipse.jgit.test/tst/org/eclipse/jgit/util/TestRng.java
rename to org.eclipse.jgit.junit/src/org/eclipse/jgit/junit/TestRng.java
index 4110b55ba..93facc377 100644
--- a/org.eclipse.jgit.test/tst/org/eclipse/jgit/util/TestRng.java
+++ b/org.eclipse.jgit.junit/src/org/eclipse/jgit/junit/TestRng.java
@@ -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;
diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/util/TemporaryBufferTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/util/TemporaryBufferTest.java
index eb2417224..e1f802b3d 100644
--- a/org.eclipse.jgit.test/tst/org/eclipse/jgit/util/TemporaryBufferTest.java
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/util/TemporaryBufferTest.java
@@ -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 {
--
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