Extend diff helpers for tests a little

tests-clar/diff/diff_helpers.c

@@ -30,10 +30,13 @@ int diff_file_fn(
 
 	GIT_UNUSED(progress);
 
-	if (delta->binary)
+	e->files++;
+
+	if (delta->binary) {
 		e->at_least_one_of_them_is_binary = true;
+		e->files_binary++;
+	}
 
-	e->files++;
 	switch (delta->status) {
 	case GIT_DELTA_ADDED: e->file_adds++; break;
 	case GIT_DELTA_DELETED: e->file_dels++; break;
@@ -180,3 +183,25 @@ abort:
 	giterr_clear();
 	return GIT_EUSER;
 }
+
+static int diff_print_cb(
+	void *cb_data,
+	const git_diff_delta *delta,
+	const git_diff_range *range,
+	char line_origin, /**< GIT_DIFF_LINE_... value from above */
+	const char *content,
+	size_t content_len)
+{
+	GIT_UNUSED(cb_data);
+	GIT_UNUSED(delta);
+	GIT_UNUSED(range);
+	GIT_UNUSED(line_origin);
+	GIT_UNUSED(content_len);
+	fputs(content, (FILE *)cb_data);
+	return 0;
+}
+
+void diff_print(FILE *fp, git_diff_list *diff)
+{
+	cl_git_pass(git_diff_print_patch(diff, fp ? fp : stderr, diff_print_cb));
+}

tests-clar/diff/diff_helpers.h

@@ -6,6 +6,8 @@ extern git_tree *resolve_commit_oid_to_tree(
 
 typedef struct {
 	int files;
+	int files_binary;
+
 	int file_adds;
 	int file_dels;
 	int file_mods;
@@ -51,3 +53,5 @@ extern int diff_foreach_via_iterator(
 	git_diff_file_fn file_cb,
 	git_diff_hunk_fn hunk_cb,
 	git_diff_data_fn line_cb);
+
+extern void diff_print(FILE *fp, git_diff_list *diff);

tests-clar/diff/tree.c

@@ -113,16 +113,16 @@ void test_diff_tree__options(void)
 	 */
 	diff_expects test_expects[] = {
 		/* a vs b tests */
-		{ 5, 3, 0, 2, 0, 0, 0, 4, 0, 0, 51, 2, 46, 3 },
-		{ 5, 3, 0, 2, 0, 0, 0, 4, 0, 0, 53, 4, 46, 3 },
-		{ 5, 0, 3, 2, 0, 0, 0, 4, 0, 0, 52, 3, 3, 46 },
-		{ 5, 3, 0, 2, 0, 0, 0, 5, 0, 0, 54, 3, 47, 4 },
+		{ 5, 0, 3, 0, 2, 0, 0, 0, 4, 0, 0, 51, 2, 46, 3 },
+		{ 5, 0, 3, 0, 2, 0, 0, 0, 4, 0, 0, 53, 4, 46, 3 },
+		{ 5, 0, 0, 3, 2, 0, 0, 0, 4, 0, 0, 52, 3, 3, 46 },
+		{ 5, 0, 3, 0, 2, 0, 0, 0, 5, 0, 0, 54, 3, 47, 4 },
 		/* c vs d tests */
-		{ 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 22, 9, 10, 3 },
-		{ 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 19, 12, 7, 0 },
-		{ 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 20, 11, 8, 1 },
-		{ 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 20, 11, 8, 1 },
-		{ 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 18, 11, 0, 7 },
+		{ 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 22, 9, 10, 3 },
+		{ 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 19, 12, 7, 0 },
+		{ 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 20, 11, 8, 1 },
+		{ 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 20, 11, 8, 1 },
+		{ 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 18, 11, 0, 7 },
 		{ 0 },
 	};
 	diff_expects *expected;