tests: move racy tests to the index

They fit there much better, even though we often check by diffing, it's
about the behaviour of the index.

1 files changed, 100 insertions, 0 deletions

diff --git a/tests/index/racy.c b/tests/index/racy.c
new file mode 100644
index 000000000..089fe5d7d
--- /dev/null
+++ b/tests/index/racy.c
@@ -0,0 +1,100 @@
+#include "clar_libgit2.h"
+#include "../checkout/checkout_helpers.h"
+
+#include "buffer.h"
+#include "index.h"
+
+static git_repository *g_repo;
+
+void test_index_racy__initialize(void)
+{
+	cl_git_pass(git_repository_init(&g_repo, "diff_racy", false));
+}
+
+void test_index_racy__cleanup(void)
+{
+	git_repository_free(g_repo);
+	g_repo = NULL;
+
+	cl_fixture_cleanup("diff_racy");
+}
+
+void test_index_racy__diff(void)
+{
+	git_index *index;
+	git_diff *diff;
+	git_buf path = GIT_BUF_INIT;
+
+	cl_git_pass(git_buf_joinpath(&path, git_repository_workdir(g_repo), "A"));
+	cl_git_mkfile(path.ptr, "A");
+
+	/* Put 'A' into the index */
+	cl_git_pass(git_repository_index(&index, g_repo));
+	cl_git_pass(git_index_add_bypath(index, "A"));
+	cl_git_pass(git_index_write(index));
+
+	cl_git_pass(git_diff_index_to_workdir(&diff, g_repo, index, NULL));
+	cl_assert_equal_i(0, git_diff_num_deltas(diff));
+	git_diff_free(diff);
+
+	/* Change its contents quickly, so we get the same timestamp */
+	cl_git_mkfile(path.ptr, "B");
+
+	cl_git_pass(git_diff_index_to_workdir(&diff, g_repo, index, NULL));
+	cl_assert_equal_i(1, git_diff_num_deltas(diff));
+
+	git_index_free(index);
+	git_diff_free(diff);
+	git_buf_free(&path);
+}
+
+void test_index_racy__write_index_just_after_file(void)
+{
+	git_index *index;
+	git_diff *diff;
+	git_buf path = GIT_BUF_INIT;
+	struct timeval times[2];
+
+	/* Make sure we do have a timestamp */
+	cl_git_pass(git_repository_index(&index, g_repo));
+	cl_git_pass(git_index_write(index));
+
+	cl_git_pass(git_buf_joinpath(&path, git_repository_workdir(g_repo), "A"));
+	cl_git_mkfile(path.ptr, "A");
+	/* Force the file's timestamp to be a second after we wrote the index */
+	times[0].tv_sec = index->stamp.mtime + 1;
+	times[0].tv_usec = 0;
+	times[1].tv_sec = index->stamp.mtime + 1;
+	times[1].tv_usec = 0;
+	cl_git_pass(p_utimes(path.ptr, times));
+
+	/*
+	 * Put 'A' into the index, the size field will be filled,
+	 * because the index' on-disk timestamp does not match the
+	 * file's timestamp.
+	 */
+	cl_git_pass(git_index_add_bypath(index, "A"));
+	cl_git_pass(git_index_write(index));
+
+	cl_git_mkfile(path.ptr, "B");
+	/*
+	 * Pretend this index' modification happend a second after the
+	 * file update, and rewrite the file in that same second.
+	 */
+	times[0].tv_sec = index->stamp.mtime + 2;
+	times[0].tv_usec = 0;
+	times[1].tv_sec = index->stamp.mtime + 2;
+	times[0].tv_usec = 0;
+
+	cl_git_pass(p_utimes(git_index_path(index), times));
+	cl_git_pass(p_utimes(path.ptr, times));
+
+	cl_git_pass(git_index_read(index, true));
+
+	cl_git_pass(git_diff_index_to_workdir(&diff, g_repo, index, NULL));
+	cl_assert_equal_i(1, git_diff_num_deltas(diff));
+
+	git_buf_free(&path);
+	git_diff_free(diff);
+	git_index_free(index);
+}