stash: add git_stash_drop()

1 files changed, 126 insertions, 0 deletions

diff --git a/tests-clar/stash/drop.c b/tests-clar/stash/drop.c
new file mode 100644
index 000000000..136a94242
--- /dev/null
+++ b/tests-clar/stash/drop.c
@@ -0,0 +1,126 @@
+#include "clar_libgit2.h"
+#include "fileops.h"
+#include "stash_helpers.h"
+
+static git_repository *repo;
+static git_signature *signature;
+
+void test_stash_drop__initialize(void)
+{
+	cl_git_pass(git_repository_init(&repo, "stash", 0));
+	cl_git_pass(git_signature_new(&signature, "nulltoken", "emeric.fermas@gmail.com", 1323847743, 60)); /* Wed Dec 14 08:29:03 2011 +0100 */
+}
+
+void test_stash_drop__cleanup(void)
+{
+	git_signature_free(signature);
+	git_repository_free(repo);
+	cl_git_pass(git_futils_rmdir_r("stash", NULL, GIT_DIRREMOVAL_FILES_AND_DIRS));
+}
+
+void test_stash_drop__cannot_drop_from_an_empty_stash(void)
+{
+	cl_assert_equal_i(GIT_ENOTFOUND, git_stash_drop(repo, 0));
+}
+
+static void push_three_states(void)
+{
+	git_oid oid;
+	git_index *index;
+
+	cl_git_mkfile("stash/zero.txt", "content\n");
+	cl_git_pass(git_repository_index(&index, repo));
+	cl_git_pass(git_index_add(index, "zero.txt", 0));
+	commit_staged_files(&oid, index, signature);
+
+	cl_git_mkfile("stash/one.txt", "content\n");
+	cl_git_pass(git_stash_save(&oid, repo, signature, "First", GIT_STASH_INCLUDE_UNTRACKED));
+
+	cl_git_mkfile("stash/two.txt", "content\n");
+	cl_git_pass(git_stash_save(&oid, repo, signature, "Second", GIT_STASH_INCLUDE_UNTRACKED));
+
+	cl_git_mkfile("stash/three.txt", "content\n");
+	cl_git_pass(git_stash_save(&oid, repo, signature, "Third", GIT_STASH_INCLUDE_UNTRACKED));
+
+	git_index_free(index);
+}
+
+void test_stash_drop__cannot_drop_a_non_existing_stashed_state(void)
+{
+	push_three_states();
+
+	cl_assert_equal_i(GIT_ENOTFOUND, git_stash_drop(repo, 666));
+	cl_assert_equal_i(GIT_ENOTFOUND, git_stash_drop(repo, 42));
+	cl_assert_equal_i(GIT_ENOTFOUND, git_stash_drop(repo, 3));
+}
+
+void test_stash_drop__can_purge_the_stash_from_the_top(void)
+{
+	push_three_states();
+
+	cl_git_pass(git_stash_drop(repo, 0));
+	cl_git_pass(git_stash_drop(repo, 0));
+	cl_git_pass(git_stash_drop(repo, 0));
+
+	cl_assert_equal_i(GIT_ENOTFOUND, git_stash_drop(repo, 0));
+}
+
+void test_stash_drop__can_purge_the_stash_from_the_bottom(void)
+{
+	push_three_states();
+
+	cl_git_pass(git_stash_drop(repo, 2));
+	cl_git_pass(git_stash_drop(repo, 1));
+	cl_git_pass(git_stash_drop(repo, 0));
+
+	cl_assert_equal_i(GIT_ENOTFOUND, git_stash_drop(repo, 0));
+}
+
+void test_stash_drop__dropping_an_entry_rewrites_reflog_history(void)
+{
+	git_reference *stash;
+	git_reflog *reflog;
+	const git_reflog_entry *entry;
+	git_oid oid;
+	size_t count;
+
+	push_three_states();
+
+	cl_git_pass(git_reference_lookup(&stash, repo, "refs/stash"));
+	
+	cl_git_pass(git_reflog_read(&reflog, stash));
+	entry = git_reflog_entry_byindex(reflog, 1);
+
+	git_oid_cpy(&oid, git_reflog_entry_oidold(entry));
+	count = git_reflog_entrycount(reflog);
+	
+	git_reflog_free(reflog);
+
+	cl_git_pass(git_stash_drop(repo, 1));
+
+	cl_git_pass(git_reflog_read(&reflog, stash));
+	entry = git_reflog_entry_byindex(reflog, 1);
+
+	cl_assert_equal_i(0, git_oid_cmp(&oid, git_reflog_entry_oidold(entry)));
+	cl_assert_equal_i(count - 1, git_reflog_entrycount(reflog));
+
+	git_reflog_free(reflog);
+
+	git_reference_free(stash);
+}
+
+void test_stash_drop__dropping_the_last_entry_removes_the_stash(void)
+{
+	git_reference *stash;
+
+	push_three_states();
+
+	cl_git_pass(git_reference_lookup(&stash, repo, "refs/stash"));
+	git_reference_free(stash);
+
+	cl_git_pass(git_stash_drop(repo, 0));
+	cl_git_pass(git_stash_drop(repo, 0));
+	cl_git_pass(git_stash_drop(repo, 0));
+
+	cl_assert_equal_i(GIT_ENOTFOUND, git_reference_lookup(&stash, repo, "refs/stash"));
+}