Commit 2d24690c by Kartikaya Gupta

Add testcase

parent 4c462bb6
......@@ -21,6 +21,8 @@ void test_diff_rename__cleanup(void)
#define RENAME_MODIFICATION_COMMIT "19dd32dfb1520a64e5bbaae8dce6ef423dfa2f13"
#define REWRITE_DELETE_COMMIT "84d8efa38af7ace2b302de0adbda16b1f1cd2e1b"
#define DELETE_RENAME_COMMIT "be053a189b0bbde545e0a3f59ce00b46ad29ce0d"
#define BREAK_REWRITE_BASE_COMMIT "db98035f715427eef1f5e17f03e1801c05301e9e"
#define BREAK_REWRITE_COMMIT "7e7bfb88ba9bc65fd700fee1819cf1c317aafa56"
/*
* Renames repo has:
......@@ -1977,3 +1979,56 @@ void test_diff_rename__delete_and_rename(void)
git_tree_free(old_tree);
git_tree_free(new_tree);
}
/*
* The break_rewrite branch contains a testcase reduced from
* a real-world scenario, rather than being "constructed" like
* the above tests seem to be. There are two commits layered
* on top of the repo's initial commit; the base commit which
* clears out the files from the initial commit and installs
* four files. And then there's the modification commit which
* mutates the files in such a way as to trigger the bug in
* libgit2.
* commit db98035f715427eef1f5e17f03e1801c05301e9e
* serving.txt (deleted)
* sevencities.txt (deleted)
* AAA (313 lines)
* BBB (314 lines)
* CCC (704 lines)
* DDD (314 lines, identical to BBB)
* commit 7e7bfb88ba9bc65fd700fee1819cf1c317aafa56
* This deletes CCC and makes slight modifications
* to AAA, BBB, and DDD. The find_best_matches loop
* for git_diff_find_similar computes the following:
* CCC moved to AAA (similarity 91)
* CCC copied to AAA (similarity 91)
* DDD moved to BBB (similarity 52)
* CCC copied to BBB (similarity 90)
* BBB moved to DDD (similarity 52)
* CCC copied to DDD (similarity 90)
* The code to rewrite the diffs by resolving these
* copies/renames would resolve the BBB <-> DDD moves
* but then still leave BBB as a rename target for
* the deleted file CCC. Since the split flag on BBB
* was cleared, this would trigger an error.
*/
void test_diff_rename__break_rewrite(void)
{
const char *old_sha = BREAK_REWRITE_BASE_COMMIT;
const char *new_sha = BREAK_REWRITE_COMMIT;
git_tree *old_tree, *new_tree;
git_diff *diff;
git_diff_find_options find_opts = GIT_DIFF_FIND_OPTIONS_INIT;
old_tree = resolve_commit_oid_to_tree(g_repo, old_sha);
new_tree = resolve_commit_oid_to_tree(g_repo, new_sha);
find_opts.flags = GIT_DIFF_FIND_RENAMES | GIT_DIFF_FIND_COPIES | GIT_DIFF_BREAK_REWRITES | GIT_DIFF_BREAK_REWRITES_FOR_RENAMES_ONLY;
cl_git_pass(git_diff_tree_to_tree(&diff, g_repo, old_tree, new_tree, NULL));
cl_git_pass(git_diff_find_similar(diff, &find_opts));
git_diff_free(diff);
git_tree_free(old_tree);
git_tree_free(new_tree);
}
19dd32dfb1520a64e5bbaae8dce6ef423dfa2f13
......@@ -2,3 +2,8 @@
31e47d8c1fa36d7f8d537b96158e3f024de0a9f2 2bc7f351d20b53f1c72c16c4b036e491c478c49a Russell Belfer <rb@github.com> 1351024817 -0700 commit: copy and rename with no change
2bc7f351d20b53f1c72c16c4b036e491c478c49a 1c068dee5790ef1580cfc4cd670915b48d790084 Russell Belfer <rb@github.com> 1361485758 -0800 commit: rewrites, copies with changes, etc.
1c068dee5790ef1580cfc4cd670915b48d790084 19dd32dfb1520a64e5bbaae8dce6ef423dfa2f13 Russell Belfer <rb@github.com> 1361486360 -0800 commit: more renames and smallish modifications
19dd32dfb1520a64e5bbaae8dce6ef423dfa2f13 31e47d8c1fa36d7f8d537b96158e3f024de0a9f2 Kartikaya Gupta <kats@pancake.staktrace.com> 1618486966 -0400 checkout: moving from master to break_rewrite
31e47d8c1fa36d7f8d537b96158e3f024de0a9f2 db98035f715427eef1f5e17f03e1801c05301e9e Kartikaya Gupta <kats@pancake.staktrace.com> 1618487039 -0400 commit: This test needs to start with a minimum of four files
db98035f715427eef1f5e17f03e1801c05301e9e 7e7bfb88ba9bc65fd700fee1819cf1c317aafa56 Kartikaya Gupta <kats@pancake.staktrace.com> 1618487097 -0400 commit: Copy/modify files around
7e7bfb88ba9bc65fd700fee1819cf1c317aafa56 19dd32dfb1520a64e5bbaae8dce6ef423dfa2f13 Kartikaya Gupta <kats@pancake.staktrace.com> 1618487105 -0400 checkout: moving from break_rewrite to master
19dd32dfb1520a64e5bbaae8dce6ef423dfa2f13 19dd32dfb1520a64e5bbaae8dce6ef423dfa2f13 Kartikaya Gupta <kats@pancake.staktrace.com> 1618487271 -0400 reset: moving to HEAD
7e7bfb88ba9bc65fd700fee1819cf1c317aafa56
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