reflog: introduce git_reflog_entry_drop()

1 files changed, 111 insertions, 0 deletions

diff --git a/tests-clar/refs/reflog/drop.c b/tests-clar/refs/reflog/drop.c
new file mode 100644
index 000000000..be404947e
--- /dev/null
+++ b/tests-clar/refs/reflog/drop.c
@@ -0,0 +1,111 @@
+#include "clar_libgit2.h"
+
+#include "reflog.h"
+
+static git_repository *g_repo;
+static git_reflog *g_reflog;
+static unsigned int entrycount;
+
+void test_refs_reflog_drop__initialize(void)
+{
+	git_reference *ref;
+	
+	g_repo = cl_git_sandbox_init("testrepo.git");
+	cl_git_pass(git_reference_lookup(&ref, g_repo, "HEAD"));
+	
+	git_reflog_read(&g_reflog, ref);
+	entrycount = git_reflog_entrycount(g_reflog);
+
+	git_reference_free(ref);
+}
+
+void test_refs_reflog_drop__cleanup(void)
+{
+	git_reflog_free(g_reflog);
+
+	cl_git_sandbox_cleanup();
+}
+
+void test_refs_reflog_drop__dropping_a_non_exisiting_entry_from_the_log_returns_ENOTFOUND(void)
+{
+	cl_assert_equal_i(GIT_ENOTFOUND, git_reflog_entry_drop(g_reflog, entrycount, 0));
+
+	cl_assert_equal_i(entrycount, git_reflog_entrycount(g_reflog));
+}
+
+void test_refs_reflog_drop__can_drop_an_entry(void)
+{
+	cl_assert(entrycount > 4);
+
+	cl_git_pass(git_reflog_entry_drop(g_reflog, 2, 0));
+	cl_assert_equal_i(entrycount - 1, git_reflog_entrycount(g_reflog));
+}
+
+void test_refs_reflog_drop__can_drop_an_entry_and_rewrite_the_log_history(void)
+{
+	const git_reflog_entry *before_previous, *before_next;
+	const git_reflog_entry *after_next;
+	git_oid before_next_old_oid;
+
+	cl_assert(entrycount > 4);
+
+	before_previous = git_reflog_entry_byindex(g_reflog, 3);
+	before_next = git_reflog_entry_byindex(g_reflog, 1);
+	git_oid_cpy(&before_next_old_oid, &before_next->oid_old);
+
+	cl_git_pass(git_reflog_entry_drop(g_reflog, 2, 1));
+	cl_assert_equal_i(entrycount - 1, git_reflog_entrycount(g_reflog));
+
+	after_next = git_reflog_entry_byindex(g_reflog, 1);
+
+	cl_assert_equal_i(0, git_oid_cmp(&before_next->oid_cur, &after_next->oid_cur));
+	cl_assert(git_oid_cmp(&before_next_old_oid, &after_next->oid_old) != 0);
+	cl_assert_equal_i(0, git_oid_cmp(&before_previous->oid_cur, &after_next->oid_old));
+}
+
+void test_refs_reflog_drop__can_drop_the_first_entry(void)
+{
+	cl_assert(entrycount > 2);
+
+	cl_git_pass(git_reflog_entry_drop(g_reflog, 0, 0));
+	cl_assert_equal_i(entrycount - 1, git_reflog_entrycount(g_reflog));
+}
+
+void test_refs_reflog_drop__can_drop_the_last_entry(void)
+{
+	const git_reflog_entry *entry;
+
+	cl_assert(entrycount > 2);
+
+	cl_git_pass(git_reflog_entry_drop(g_reflog, entrycount - 1, 0));
+	cl_assert_equal_i(entrycount - 1, git_reflog_entrycount(g_reflog));
+
+	entry = git_reflog_entry_byindex(g_reflog, entrycount - 2);
+	cl_assert(git_oid_streq(&entry->oid_old, GIT_OID_HEX_ZERO) != 0);
+}
+
+void test_refs_reflog_drop__can_drop_the_last_entry_and_rewrite_the_log_history(void)
+{
+	const git_reflog_entry *entry;
+
+	cl_assert(entrycount > 2);
+
+	cl_git_pass(git_reflog_entry_drop(g_reflog, entrycount - 1, 1));
+	cl_assert_equal_i(entrycount - 1, git_reflog_entrycount(g_reflog));
+
+	entry = git_reflog_entry_byindex(g_reflog, entrycount - 2);
+	cl_assert(git_oid_streq(&entry->oid_old, GIT_OID_HEX_ZERO) == 0);
+}
+
+void test_refs_reflog_drop__can_drop_all_the_entries(void)
+{
+	cl_assert(--entrycount > 0);
+
+	do 	{
+		cl_git_pass(git_reflog_entry_drop(g_reflog, --entrycount, 1));
+	} while (entrycount > 0);
+
+	cl_git_pass(git_reflog_entry_drop(g_reflog, 0, 1));
+
+	cl_assert_equal_i(0, git_reflog_entrycount(g_reflog));
+}