diff: fix generation of the header of a removal patch

1 files changed, 68 insertions, 0 deletions

diff --git a/tests-clar/diff/patch.c b/tests-clar/diff/patch.c
new file mode 100644
index 000000000..e2576277f
--- /dev/null
+++ b/tests-clar/diff/patch.c
@@ -0,0 +1,68 @@
+#include "clar_libgit2.h"
+#include "diff_helpers.h"
+
+static git_repository *g_repo = NULL;
+
+void test_diff_patch__initialize(void)
+{
+	g_repo = cl_git_sandbox_init("status");
+}
+
+void test_diff_patch__cleanup(void)
+{
+	cl_git_sandbox_cleanup();
+}
+
+#define EXPECTED_OUTPUT "diff --git a/subdir.txt b/subdir.txt\n" \
+	"deleted file mode 100644\n" \
+	"index e8ee89e..0000000\n" \
+	"--- a/subdir.txt\n" \
+	"+++ /dev/null\n"
+
+static int check_removal_cb(
+	void *cb_data,
+	char line_origin,
+	const char *formatted_output)
+{
+	GIT_UNUSED(cb_data);
+
+	if (line_origin != 'F')
+		return 0;
+
+	if (strcmp(EXPECTED_OUTPUT, formatted_output) == 0)
+		return 0;
+
+	return -1;
+}
+
+void test_diff_patch__can_properly_display_the_removal_of_a_file(void)
+{
+	/*
+	* $ git diff 26a125e..735b6a2
+	* diff --git a/subdir.txt b/subdir.txt
+	* deleted file mode 100644
+	* index e8ee89e..0000000
+	* --- a/subdir.txt
+	* +++ /dev/null
+	* @@ -1,2 +0,0 @@
+	* -Is it a bird?
+	* -Is it a plane?
+	*/
+
+	const char *one_sha = "26a125e";
+	const char *another_sha = "735b6a2";
+	git_tree *one, *another;
+	git_diff_list *diff;
+
+	one = resolve_commit_oid_to_tree(g_repo, one_sha);
+	another = resolve_commit_oid_to_tree(g_repo, another_sha);
+
+	cl_git_pass(git_diff_tree_to_tree(g_repo, NULL, one, another, &diff));
+
+	cl_git_pass(git_diff_print_patch(diff, NULL, check_removal_cb));
+
+	git_diff_list_free(diff);
+
+	git_tree_free(another);
+	git_tree_free(one);
+}