[EGIT PATCH 02/10] Extend IndexDiffTest with more tests

[Robin Rosenberg <robin.rosenberg@dewire.com>]

This adds tests for some nasty cases. These can be summarized
by declaring that this is the correct order:

	a.b
	a/b
	a=b

Signed-off-by: Robin Rosenberg <robin.rosenberg@dewire.com>
---
 .../tst/org/spearce/jgit/lib/IndexDiffTest.java    |   67 ++++++++++++++++++++
 1 files changed, 67 insertions(+), 0 deletions(-)

diff --git a/org.spearce.jgit.test/tst/org/spearce/jgit/lib/IndexDiffTest.java b/org.spearce.jgit.test/tst/org/spearce/jgit/lib/IndexDiffTest.java
index 629c06c..4692fa2 100644
--- a/org.spearce.jgit.test/tst/org/spearce/jgit/lib/IndexDiffTest.java
+++ b/org.spearce.jgit.test/tst/org/spearce/jgit/lib/IndexDiffTest.java
@@ -93,4 +93,71 @@ public class IndexDiffTest extends RepositoryTestCase {
 		assertEquals(0, diff.getMissing().size());
 	}
 
+	public void testUnchangedSimple() throws IOException {
+		GitIndex index = new GitIndex(db);
+
+		index.add(trash, writeTrashFile("a.b", "a.b"));
+		index.add(trash, writeTrashFile("a.c", "a.c"));
+		index.add(trash, writeTrashFile("a=c", "a=c"));
+		index.add(trash, writeTrashFile("a=d", "a=d"));
+
+		Tree tree = new Tree(db);
+		// got the hash id'd from the data using echo -n a.b|git hash-object -t blob --stdin
+		tree.addFile("a.b").setId(new ObjectId("f6f28df96c2b40c951164286e08be7c38ec74851"));
+		tree.addFile("a.c").setId(new ObjectId("6bc0e647512d2a0bef4f26111e484dc87df7f5ca"));
+		tree.addFile("a=c").setId(new ObjectId("06022365ddbd7fb126761319633bf73517770714"));
+		tree.addFile("a=d").setId(new ObjectId("fa6414df3da87840700e9eeb7fc261dd77ccd5c2"));
+
+		tree.setId(new ObjectWriter(db).writeTree(tree));
+
+		IndexDiff diff = new IndexDiff(tree, index);
+		diff.diff();
+		assertEquals(0, diff.getChanged().size());
+		assertEquals(0, diff.getAdded().size());
+		assertEquals(0, diff.getRemoved().size());
+		assertEquals(0, diff.getMissing().size());
+		assertEquals(0, diff.getModified().size());
+	}
+
+	/**
+	 * This test has both files and directories that involve
+	 * the tricky ordering used by Git.
+	 *
+	 * @throws IOException
+	 */
+	public void testUnchangedComplex() throws IOException {
+		GitIndex index = new GitIndex(db);
+
+		index.add(trash, writeTrashFile("a.b", "a.b"));
+		index.add(trash, writeTrashFile("a.c", "a.c"));
+		index.add(trash, writeTrashFile("a/b.b/b", "a/b.b/b"));
+		index.add(trash, writeTrashFile("a/b", "a/b"));
+		index.add(trash, writeTrashFile("a/c", "a/c"));
+		index.add(trash, writeTrashFile("a=c", "a=c"));
+		index.add(trash, writeTrashFile("a=d", "a=d"));
+
+		Tree tree = new Tree(db);
+		// got the hash id'd from the data using echo -n a.b|git hash-object -t blob --stdin
+		tree.addFile("a.b").setId(new ObjectId("f6f28df96c2b40c951164286e08be7c38ec74851"));
+		tree.addFile("a.c").setId(new ObjectId("6bc0e647512d2a0bef4f26111e484dc87df7f5ca"));
+		tree.addFile("a/b.b/b").setId(new ObjectId("8d840bd4e2f3a48ff417c8e927d94996849933fd"));
+		tree.addFile("a/b").setId(new ObjectId("db89c972fc57862eae378f45b74aca228037d415"));
+		tree.addFile("a/c").setId(new ObjectId("52ad142a008aeb39694bafff8e8f1be75ed7f007"));
+		tree.addFile("a=c").setId(new ObjectId("06022365ddbd7fb126761319633bf73517770714"));
+		tree.addFile("a=d").setId(new ObjectId("fa6414df3da87840700e9eeb7fc261dd77ccd5c2"));
+
+		Tree tree3 = (Tree) tree.findTreeMember("a/b.b");
+		tree3.setId(new ObjectWriter(db).writeTree(tree3));
+		Tree tree2 = (Tree) tree.findTreeMember("a");
+		tree2.setId(new ObjectWriter(db).writeTree(tree2));
+		tree.setId(new ObjectWriter(db).writeTree(tree));
+
+		IndexDiff diff = new IndexDiff(tree, index);
+		diff.diff();
+		assertEquals(0, diff.getChanged().size());
+		assertEquals(0, diff.getAdded().size());
+		assertEquals(0, diff.getRemoved().size());
+		assertEquals(0, diff.getMissing().size());
+		assertEquals(0, diff.getModified().size());
+	}
 }
-- 
1.5.4.2