merge: add a second-level recursive merge

tests/merge/trees/recursive.c

@@ -88,8 +88,6 @@ void test_merge_trees_recursive__two_norecursive(void)
 	git_index *index;
 	git_merge_options opts = GIT_MERGE_OPTIONS_INIT;
 
-	opts.flags |= GIT_MERGE_NO_RECURSIVE;
-
 	struct merge_index_entry merge_index_entries[] = {
 		{ 0100644, "ffb36e513f5fdf8a6ba850a20142676a2ac4807d", 0, "asparagus.txt" },
 		{ 0100644, "68f6182f4c85d39e1309d97c7e456156dc9c0096", 0, "beef.txt" },
@@ -101,6 +99,8 @@ void test_merge_trees_recursive__two_norecursive(void)
 		{ 0100644, "4e21d2d63357bde5027d1625f5ec6b430cdeb143", 3, "veal.txt" },
 	};
 
+	opts.flags |= GIT_MERGE_NO_RECURSIVE;
+
 	cl_git_pass(merge_commits_from_branches(&index, repo, "branchB-1", "branchB-2", &opts));
 
 	cl_assert(merge_test_index(index, merge_index_entries, 8));
@@ -108,3 +108,49 @@ void test_merge_trees_recursive__two_norecursive(void)
 	git_index_free(index);
 }
 
+void test_merge_trees_recursive__three(void)
+{
+	git_index *index;
+	git_merge_options opts = GIT_MERGE_OPTIONS_INIT;
+
+	struct merge_index_entry merge_index_entries[] = {
+		{ 0100644, "ffb36e513f5fdf8a6ba850a20142676a2ac4807d", 0, "asparagus.txt" },
+		{ 0100644, "68f6182f4c85d39e1309d97c7e456156dc9c0096", 0, "beef.txt" },
+		{ 0100644, "4b7c5650008b2e747fe1809eeb5a1dde0e80850a", 0, "bouilli.txt" },
+		{ 0100644, "c4e6cca3ec6ae0148ed231f97257df8c311e015f", 0, "gravy.txt" },
+		{ 0100644, "68af1fc7407fd9addf1701a87eb1c95c7494c598", 0, "oyster.txt" },
+		{ 0100644, "15faa0c9991f2d65686e844651faa2ff9827887b", 0, "veal.txt" },
+	};
+
+	cl_git_pass(merge_commits_from_branches(&index, repo, "branchC-1", "branchC-2", &opts));
+
+	cl_assert(merge_test_index(index, merge_index_entries, 6));
+
+	git_index_free(index);
+}
+
+void test_merge_trees_recursive__three_norecursive(void)
+{
+	git_index *index;
+	git_merge_options opts = GIT_MERGE_OPTIONS_INIT;
+
+	struct merge_index_entry merge_index_entries[] = {
+		{ 0100644, "ffb36e513f5fdf8a6ba850a20142676a2ac4807d", 0, "asparagus.txt" },
+		{ 0100644, "68f6182f4c85d39e1309d97c7e456156dc9c0096", 0, "beef.txt" },
+		{ 0100644, "4b7c5650008b2e747fe1809eeb5a1dde0e80850a", 0, "bouilli.txt" },
+		{ 0100644, "c4e6cca3ec6ae0148ed231f97257df8c311e015f", 0, "gravy.txt" },
+		{ 0100644, "68af1fc7407fd9addf1701a87eb1c95c7494c598", 0, "oyster.txt" },
+		{ 0100644, "b2a81ead9e722af0099fccfb478cea88eea749a2", 1, "veal.txt" },
+		{ 0100644, "898d12687fb35be271c27c795a6b32c8b51da79e", 2, "veal.txt" },
+		{ 0100644, "68a2e1ee61a23a4728fe6b35580fbbbf729df370", 3, "veal.txt" },
+	};
+
+	opts.flags |= GIT_MERGE_NO_RECURSIVE;
+
+	cl_git_pass(merge_commits_from_branches(&index, repo, "branchC-1", "branchC-2", &opts));
+
+	cl_assert(merge_test_index(index, merge_index_entries, 8));
+
+	git_index_free(index);
+}
+