apply: test modify delta after rename delta

Ensure that we can apply a delta after renaming a file.

Author: ethomson

tests/apply/apply_helpers.h

@@ -294,6 +294,31 @@
 	"+\n" \
 	"+This is another change to a new file.\n"
 
+#define DIFF_RENAME_AND_MODIFY_DELTAS \
+	"diff --git a/veal.txt b/asdf.txt\n" \
+	"similarity index 96%\n" \
+	"rename from veal.txt\n" \
+	"rename to asdf.txt\n" \
+	"index 94d2c01..292cb60 100644\n" \
+	"--- a/veal.txt\n" \
+	"+++ b/asdf.txt\n" \
+	"@@ -15,4 +15,4 @@ will curdle in the soup. For a change you may put a dozen ripe tomatos\n" \
+	" in, first taking off their skins, by letting them stand a few minutes in\n" \
+	" hot water, when they may be easily peeled. When made in this way you\n" \
+	" must thicken it with the flour only. Any part of the veal may be used,\n" \
+	"-but the shin or knuckle is the nicest.\n" \
+	"+but the shin or knuckle is the nicest!\n" \
+	"diff --git a/asdf.txt b/asdf.txt\n" \
+	"index 292cb60..61c686b 100644\n" \
+	"--- a/asdf.txt\n" \
+	"+++ b/asdf.txt\n" \
+	"@@ -1,4 +1,4 @@\n" \
+	"-VEAL SOUP!\n" \
+	"+VEAL SOUP\n" \
+	"\n" \
+	" Put into a pot three quarts of water, three onions cut small, one\n" \
+	" spoonful of black pepper pounded, and two of salt, with two or three\n"
+
 struct iterator_compare_data {
 	struct merge_index_entry *expected;
 	size_t cnt;

tests/apply/both.c

@@ -625,3 +625,28 @@ void test_apply_both__two_deltas_one_new_file(void)
 
 	git_diff_free(diff);
 }
+
+void test_apply_both__rename_and_modify_deltas(void)
+{
+	git_diff *diff;
+
+	struct merge_index_entry both_expected[] = {
+		{ 0100644, "61c686bed39684eee8a2757ceb1291004a21333f", 0, "asdf.txt" },
+		{ 0100644, "f51658077d85f2264fa179b4d0848268cb3475c3", 0, "asparagus.txt" },
+		{ 0100644, "68f6182f4c85d39e1309d97c7e456156dc9c0096", 0, "beef.txt" },
+		{ 0100644, "4b7c5650008b2e747fe1809eeb5a1dde0e80850a", 0, "bouilli.txt" },
+		{ 0100644, "c4e6cca3ec6ae0148ed231f97257df8c311e015f", 0, "gravy.txt" },
+		{ 0100644, "68af1fc7407fd9addf1701a87eb1c95c7494c598", 0, "oyster.txt" },
+	};
+	size_t both_expected_cnt = sizeof(both_expected) /
+		sizeof(struct merge_index_entry);
+
+	cl_git_pass(git_diff_from_buffer(&diff, DIFF_RENAME_AND_MODIFY_DELTAS,
+		strlen(DIFF_RENAME_AND_MODIFY_DELTAS)));
+	cl_git_pass(git_apply(repo, diff, GIT_APPLY_LOCATION_BOTH, NULL));
+
+	validate_apply_index(repo, both_expected, both_expected_cnt);
+	validate_apply_workdir(repo, both_expected, both_expected_cnt);
+
+	git_diff_free(diff);
+}