binary diff: test that the diff and patch otputs are the same

We test the generation of the textual patch via the patch function,
which are just one of two possibilities to get the output.

Add a second patch generation via the diff function to make sure both
outputs are in sync.

diff --git a/tests/diff/binary.c b/tests/diff/binary.c
index 424a53e5f098a74718dc77c0e20cf3ededd7f29e..90f2d5a061c136bf9c6b422fbb1948b2b02604d6 100644 (file)
--- a/tests/diff/binary.c
+++ b/tests/diff/binary.c
@@ -1,5 +1,7 @@
 #include "clar_libgit2.h"
 
+#include "git2/sys/diff.h"
+
 #include "buffer.h"
 #include "filebuf.h"
 
@@ -49,6 +51,11 @@ void test_patch(
 
        cl_assert_equal_s(expected, actual.ptr);
 
+       git_buf_clear(&actual);
+       cl_git_pass(git_diff_print(diff, GIT_DIFF_FORMAT_PATCH, git_diff_print_callback__to_buf, &actual));
+
+       cl_assert_equal_s(expected, actual.ptr);
+
        git_buf_free(&actual);
        git_patch_free(patch);
        git_diff_free(diff);