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authorChristian Halstrick <christian.halstrick@sap.com>2014-07-18 11:04:33 +0200
committerRobin Stocker <robin@nibor.org>2014-07-25 03:32:38 -0400
commit0c4553d28a34dfb64f4af68032a9a33ca297975e (patch)
tree08eea10cb6b9aaf45a79c218d84ef7b90b9e46b6 /org.eclipse.jgit.test
parentcf9b01b09a320de4afb8da8f2ec5002fd0441831 (diff)
downloadjgit-0c4553d28a34dfb64f4af68032a9a33ca297975e.tar.gz
jgit-0c4553d28a34dfb64f4af68032a9a33ca297975e.zip
Fix RecursiveMerger's internal use of merge to find a merge base
When RecursiveMerger tried to determine a common base tree it was recursively tried to merge multiple common bases. But these intermediate merges which have just been done to determine a single common base for the final merge already filled some important fields (toBeCheckedOut, toBeDeleted, ...). These side effects of the intermediate merges led to wrong results of the final merge. One symptom was that after a recursive merge which should be succesful you could still see leftover files in the worktree: files which existed in the (virtual) common base but which don't exist anymore in the branches to be merged. The solution is easy: Clear the appropriate fields after common base determination and start the final merge with a clean state. Change-Id: I644ea9e1cb15360f7901bc0483cdb9286308c226 Signed-off-by: Robin Rosenberg <robin.rosenberg@dewire.com>
Diffstat (limited to 'org.eclipse.jgit.test')
-rw-r--r--org.eclipse.jgit.test/tst/org/eclipse/jgit/merge/RecursiveMergerTest.java180
1 files changed, 179 insertions, 1 deletions
diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/merge/RecursiveMergerTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/merge/RecursiveMergerTest.java
index 8f43f7f868..4e39daaf4f 100644
--- a/org.eclipse.jgit.test/tst/org/eclipse/jgit/merge/RecursiveMergerTest.java
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/merge/RecursiveMergerTest.java
@@ -44,6 +44,7 @@ package org.eclipse.jgit.merge;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
import java.io.BufferedReader;
import java.io.File;
@@ -178,7 +179,7 @@ public class RecursiveMergerTest extends RepositoryTestCase {
/**
* Merging m2,s2 from the following topology. The same file is modified
* in both branches. The modifications should be mergeable. m2 and s2
- * contain branch specific conflict resolutions. Therefore m2 and don't contain the same content.
+ * contain branch specific conflict resolutions. Therefore m2 and s2 don't contain the same content.
*
* <pre>
* m0--m1--m2
@@ -260,6 +261,183 @@ public class RecursiveMergerTest extends RepositoryTestCase {
@Theory
/**
* Merging m2,s2 from the following topology. The same file is modified
+ * in both branches. The modifications should be mergeable but only if the automerge of m1 and s1
+ * is choosen as parent. Choosing m0 as parent would not be sufficient (in contrast to the merge in
+ * crissCrossMerge_mergeable). m2 and s2 contain branch specific conflict resolutions. Therefore m2
+ * and s2 don't contain the same content.
+ *
+ * <pre>
+ * m0--m1--m2
+ * \ \/
+ * \ /\
+ * s1--s2
+ * </pre>
+ */
+ public void crissCrossMerge_mergeable2(MergeStrategy strategy,
+ IndexState indexState, WorktreeState worktreeState)
+ throws Exception {
+ if (!validateStates(indexState, worktreeState))
+ return;
+
+ BranchBuilder master = db_t.branch("master");
+ RevCommit m0 = master.commit().add("f", "1\n2\n3\n")
+ .message("m0")
+ .create();
+ RevCommit m1 = master.commit().add("f", "1-master\n2\n3\n")
+ .message("m1").create();
+ db_t.getRevWalk().parseCommit(m1);
+
+ BranchBuilder side = db_t.branch("side");
+ RevCommit s1 = side.commit().parent(m0).add("f", "1\n2\n3-side\n")
+ .message("s1").create();
+ RevCommit s2 = side.commit().parent(m1)
+ .add("f", "1-master\n2\n3-side-r\n")
+ .message("s2(merge)")
+ .create();
+ RevCommit m2 = master.commit().parent(s1)
+ .add("f", "1-master-r\n2\n3-side\n")
+ .message("m2(merge)")
+ .create();
+
+ Git git = Git.wrap(db);
+ git.checkout().setName("master").call();
+ modifyWorktree(worktreeState, "f", "side");
+ modifyIndex(indexState, "f", "side");
+
+ ResolveMerger merger = (ResolveMerger) strategy.newMerger(db,
+ worktreeState == WorktreeState.Bare);
+ if (worktreeState != WorktreeState.Bare)
+ merger.setWorkingTreeIterator(new FileTreeIterator(db));
+ try {
+ boolean expectSuccess = true;
+ if (!(indexState == IndexState.Bare
+ || indexState == IndexState.Missing || indexState == IndexState.SameAsHead))
+ // index is dirty
+ expectSuccess = false;
+ else if (worktreeState == WorktreeState.DifferentFromHeadAndOther
+ || worktreeState == WorktreeState.SameAsOther)
+ expectSuccess = false;
+ assertEquals(Boolean.valueOf(expectSuccess),
+ Boolean.valueOf(merger.merge(new RevCommit[] { m2, s2 })));
+ assertEquals(MergeStrategy.RECURSIVE, strategy);
+ if (!expectSuccess)
+ // if the merge was not successful skip testing the state of
+ // index and workingtree
+ return;
+ assertEquals(
+ "1-master-r\n2\n3-side-r",
+ contentAsString(db, merger.getResultTreeId(), "f"));
+ if (indexState != IndexState.Bare)
+ assertEquals(
+ "[f, mode:100644, content:1-master-r\n2\n3-side-r\n]",
+ indexState(RepositoryTestCase.CONTENT));
+ if (worktreeState != WorktreeState.Bare
+ && worktreeState != WorktreeState.Missing)
+ assertEquals(
+ "1-master-r\n2\n3-side-r\n",
+ read("f"));
+ } catch (NoMergeBaseException e) {
+ assertEquals(MergeStrategy.RESOLVE, strategy);
+ assertEquals(e.getReason(),
+ MergeBaseFailureReason.MULTIPLE_MERGE_BASES_NOT_SUPPORTED);
+ }
+ }
+
+ @Theory
+ /**
+ * Merging m2,s2 from the following topology. The same file is modified
+ * in both branches. The modifications should be mergeable but only if the automerge of m1 and s1
+ * is choosen as parent. On both branches delete and modify files untouched on the other branch.
+ * On both branches create new files. Make sure these files are correctly merged and
+ * exist in the workingtree.
+ *
+ * <pre>
+ * m0--m1--m2
+ * \ \/
+ * \ /\
+ * s1--s2
+ * </pre>
+ */
+ public void crissCrossMerge_checkOtherFiles(MergeStrategy strategy,
+ IndexState indexState, WorktreeState worktreeState)
+ throws Exception {
+ if (!validateStates(indexState, worktreeState))
+ return;
+
+ BranchBuilder master = db_t.branch("master");
+ RevCommit m0 = master.commit().add("f", "1\n2\n3\n").add("m.m", "0")
+ .add("m.d", "0").add("s.m", "0").add("s.d", "0").message("m0")
+ .create();
+ RevCommit m1 = master.commit().add("f", "1-master\n2\n3\n")
+ .add("m.c", "0").add("m.m", "1").rm("m.d").message("m1")
+ .create();
+ db_t.getRevWalk().parseCommit(m1);
+
+ BranchBuilder side = db_t.branch("side");
+ RevCommit s1 = side.commit().parent(m0).add("f", "1\n2\n3-side\n")
+ .add("s.c", "0").add("s.m", "1").rm("s.d").message("s1")
+ .create();
+ RevCommit s2 = side.commit().parent(m1)
+ .add("f", "1-master\n2\n3-side-r\n").add("m.m", "1")
+ .add("m.c", "0").rm("m.d").message("s2(merge)").create();
+ RevCommit m2 = master.commit().parent(s1)
+ .add("f", "1-master-r\n2\n3-side\n").add("s.m", "1")
+ .add("s.c", "0").rm("s.d").message("m2(merge)").create();
+
+ Git git = Git.wrap(db);
+ git.checkout().setName("master").call();
+ modifyWorktree(worktreeState, "f", "side");
+ modifyIndex(indexState, "f", "side");
+
+ ResolveMerger merger = (ResolveMerger) strategy.newMerger(db,
+ worktreeState == WorktreeState.Bare);
+ if (worktreeState != WorktreeState.Bare)
+ merger.setWorkingTreeIterator(new FileTreeIterator(db));
+ try {
+ boolean expectSuccess = true;
+ if (!(indexState == IndexState.Bare
+ || indexState == IndexState.Missing || indexState == IndexState.SameAsHead))
+ // index is dirty
+ expectSuccess = false;
+ else if (worktreeState == WorktreeState.DifferentFromHeadAndOther
+ || worktreeState == WorktreeState.SameAsOther)
+ expectSuccess = false;
+ assertEquals(Boolean.valueOf(expectSuccess),
+ Boolean.valueOf(merger.merge(new RevCommit[] { m2, s2 })));
+ assertEquals(MergeStrategy.RECURSIVE, strategy);
+ if (!expectSuccess)
+ // if the merge was not successful skip testing the state of
+ // index and workingtree
+ return;
+ assertEquals(
+ "1-master-r\n2\n3-side-r",
+ contentAsString(db, merger.getResultTreeId(), "f"));
+ if (indexState != IndexState.Bare)
+ assertEquals(
+ "[f, mode:100644, content:1-master-r\n2\n3-side-r\n][m.c, mode:100644, content:0][m.m, mode:100644, content:1][s.c, mode:100644, content:0][s.m, mode:100644, content:1]",
+ indexState(RepositoryTestCase.CONTENT));
+ if (worktreeState != WorktreeState.Bare
+ && worktreeState != WorktreeState.Missing) {
+ assertEquals(
+ "1-master-r\n2\n3-side-r\n",
+ read("f"));
+ assertTrue(check("s.c"));
+ assertFalse(check("s.d"));
+ assertTrue(check("s.m"));
+ assertTrue(check("m.c"));
+ assertFalse(check("m.d"));
+ assertTrue(check("m.m"));
+ }
+ } catch (NoMergeBaseException e) {
+ assertEquals(MergeStrategy.RESOLVE, strategy);
+ assertEquals(e.getReason(),
+ MergeBaseFailureReason.MULTIPLE_MERGE_BASES_NOT_SUPPORTED);
+ }
+ }
+
+ @Theory
+ /**
+ * Merging m2,s2 from the following topology. The same file is modified
* in both branches. The modifications are not automatically
* mergeable. m2 and s2 contain branch specific conflict resolutions.
* Therefore m2 and s2 don't contain the same content.