patch::parse: test diff with exact rename and copy

Author: Edward Thomson

tests/diff/parse.c

@@ -139,5 +139,10 @@ void test_diff_parse__can_parse_generated_diff(void)
 		"31e47d8c1fa36d7f8d537b96158e3f024de0a9f2",
 		"2bc7f351d20b53f1c72c16c4b036e491c478c49a",
 		0, GIT_DIFF_FIND_RENAMES);
+	test_tree_to_tree_computed_to_parsed("renames",
+		"31e47d8c1fa36d7f8d537b96158e3f024de0a9f2",
+		"2bc7f351d20b53f1c72c16c4b036e491c478c49a",
+		GIT_DIFF_INCLUDE_UNMODIFIED,
+		GIT_DIFF_FIND_COPIES_FROM_UNMODIFIED | GIT_DIFF_FIND_EXACT_MATCH_ONLY);
 }