tests: verify diff stats with renames in subdirectory

Until now, we didn't have any tests that verified that our format for
renames in subdirectories is correct. While our current behaviour is no
different than for renames that do not happen with a common prefix
shared between old and new file name, we intend to change the format to
instead match the format that upstream git uses.

Add a test case for this to document our current behaviour and to show
how the next commit will change that format.

13 files changed, 27 insertions, 1 deletions

diff --git a/tests/diff/stats.c b/tests/diff/stats.c
index 24316f715..1149b5067 100644
--- a/tests/diff/stats.c
+++ b/tests/diff/stats.c
@@ -210,6 +210,25 @@ void test_diff_stats__rename_and_modifiy(void)
 	git_buf_dispose(&buf);
 }
 
+void test_diff_stats__rename_in_subdirectory(void)
+{
+	git_buf buf = GIT_BUF_INIT;
+	const char *stat =
+	" dir/orig.txt => dir/renamed.txt | 0\n"
+	" 1 file changed, 0 insertions(+), 0 deletions(-)\n";
+
+	diff_stats_from_commit_oid(
+		&_stats, "0db2a262bc8c5c3cba55254730045a8258da7a37", true);
+
+	cl_assert_equal_sz(1, git_diff_stats_files_changed(_stats));
+	cl_assert_equal_sz(0, git_diff_stats_insertions(_stats));
+	cl_assert_equal_sz(0, git_diff_stats_deletions(_stats));
+
+	cl_git_pass(git_diff_stats_to_buf(&buf, _stats, GIT_DIFF_STATS_FULL, 0));
+	cl_assert_equal_s(stat, git_buf_cstr(&buf));
+	git_buf_dispose(&buf);
+}
+
 void test_diff_stats__rename_no_find(void)
 {
 	git_buf buf = GIT_BUF_INIT;
diff --git a/tests/resources/diff_format_email/.gitted/index b/tests/resources/diff_format_email/.gitted/index
index 092a888e7..4514a6b9c 100644
--- a/tests/resources/diff_format_email/.gitted/index
+++ b/tests/resources/diff_format_email/.gitted/index
diff --git a/tests/resources/diff_format_email/.gitted/objects/07/594f324ebcf92902334c6016e30e716431dfbc b/tests/resources/diff_format_email/.gitted/objects/07/594f324ebcf92902334c6016e30e716431dfbc
new file mode 100644
index 000000000..bd273796a
--- /dev/null
+++ b/tests/resources/diff_format_email/.gitted/objects/07/594f324ebcf92902334c6016e30e716431dfbc
diff --git a/tests/resources/diff_format_email/.gitted/objects/0d/593fca18d1ab11deb6e8025c9fe417456fe883 b/tests/resources/diff_format_email/.gitted/objects/0d/593fca18d1ab11deb6e8025c9fe417456fe883
new file mode 100644
index 000000000..e49e10778
--- /dev/null
+++ b/tests/resources/diff_format_email/.gitted/objects/0d/593fca18d1ab11deb6e8025c9fe417456fe883
diff --git a/tests/resources/diff_format_email/.gitted/objects/0d/b2a262bc8c5c3cba55254730045a8258da7a37 b/tests/resources/diff_format_email/.gitted/objects/0d/b2a262bc8c5c3cba55254730045a8258da7a37
new file mode 100644
index 000000000..1399d7f1a
--- /dev/null
+++ b/tests/resources/diff_format_email/.gitted/objects/0d/b2a262bc8c5c3cba55254730045a8258da7a37
@@ -0,0 +1,2 @@
+x
��A
+�0@Q�9���f�6
� z��tBCm-i���
��?���4���VU�S��)E����hET��|}B�d6��6����=&�9�8K�ƀ<Ɓ�d��6�*ܸՒfx4-��ulp���6鱗\��z�"�"���k��4w]yQ��PV��2�j>�TI�
\ No newline at end of file
diff --git a/tests/resources/diff_format_email/.gitted/objects/39/ed6bbd76bca81c50db3aaca261456284f5d5b8 b/tests/resources/diff_format_email/.gitted/objects/39/ed6bbd76bca81c50db3aaca261456284f5d5b8
new file mode 100644
index 000000000..e08f03cf3
--- /dev/null
+++ b/tests/resources/diff_format_email/.gitted/objects/39/ed6bbd76bca81c50db3aaca261456284f5d5b8
diff --git a/tests/resources/diff_format_email/.gitted/objects/53/92ef3c959f744b892bbebb168bbbb7b05c03f3 b/tests/resources/diff_format_email/.gitted/objects/53/92ef3c959f744b892bbebb168bbbb7b05c03f3
new file mode 100644
index 000000000..308c599ab
--- /dev/null
+++ b/tests/resources/diff_format_email/.gitted/objects/53/92ef3c959f744b892bbebb168bbbb7b05c03f3
diff --git a/tests/resources/diff_format_email/.gitted/objects/85/fa91713734c588c897dd6dd67a39576f67ae50 b/tests/resources/diff_format_email/.gitted/objects/85/fa91713734c588c897dd6dd67a39576f67ae50
new file mode 100644
index 000000000..54d34128e
--- /dev/null
+++ b/tests/resources/diff_format_email/.gitted/objects/85/fa91713734c588c897dd6dd67a39576f67ae50
diff --git a/tests/resources/diff_format_email/.gitted/objects/8c/637df9661edd808932b2f5d383f2c41ced9f06 b/tests/resources/diff_format_email/.gitted/objects/8c/637df9661edd808932b2f5d383f2c41ced9f06
new file mode 100644
index 000000000..e7d672bda
--- /dev/null
+++ b/tests/resources/diff_format_email/.gitted/objects/8c/637df9661edd808932b2f5d383f2c41ced9f06
diff --git a/tests/resources/diff_format_email/.gitted/objects/94/f84b3e65e8bcbe8bffef2c885339343a802dd4 b/tests/resources/diff_format_email/.gitted/objects/94/f84b3e65e8bcbe8bffef2c885339343a802dd4
new file mode 100644
index 000000000..03b484808
--- /dev/null
+++ b/tests/resources/diff_format_email/.gitted/objects/94/f84b3e65e8bcbe8bffef2c885339343a802dd4
diff --git a/tests/resources/diff_format_email/.gitted/objects/bb/07a00e58b260c4eb9a82f8afbc1d80ad9739bf b/tests/resources/diff_format_email/.gitted/objects/bb/07a00e58b260c4eb9a82f8afbc1d80ad9739bf
new file mode 100644
index 000000000..d2cb6d0d6
--- /dev/null
+++ b/tests/resources/diff_format_email/.gitted/objects/bb/07a00e58b260c4eb9a82f8afbc1d80ad9739bf
diff --git a/tests/resources/diff_format_email/.gitted/refs/heads/master b/tests/resources/diff_format_email/.gitted/refs/heads/master
index 4024b97cd..7d5e03f61 100644
--- a/tests/resources/diff_format_email/.gitted/refs/heads/master
+++ b/tests/resources/diff_format_email/.gitted/refs/heads/master
@@ -1 +1 @@
-5219b9784f9a92d7bd7cb567a6d6a21bfb86697e
+0db2a262bc8c5c3cba55254730045a8258da7a37
diff --git a/tests/resources/diff_format_email/dir/renamed.txt b/tests/resources/diff_format_email/dir/renamed.txt
new file mode 100644
index 000000000..7aff11da9
--- /dev/null
+++ b/tests/resources/diff_format_email/dir/renamed.txt
@@ -0,0 +1,5 @@
+file2
+file2
+file2
+file2!
+file2