thodg/libgit2/tests/network/remote/defaultbranch.c

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• Hash : f0e693b1
  Author :
  Date : 2021-09-07T17:53:49
  

  str: introduce `git_str` for internal, `git_buf` is external
  
  libgit2 has two distinct requirements that were previously solved by
  `git_buf`.  We require:
  
  1. A general purpose string class that provides a number of utility APIs
     for manipulating data (eg, concatenating, truncating, etc).
  2. A structure that we can use to return strings to callers that they
     can take ownership of.
  
  By using a single class (`git_buf`) for both of these purposes, we have
  confused the API to the point that refactorings are difficult and
  reasoning about correctness is also difficult.
  
  Move the utility class `git_buf` to be called `git_str`: this represents
  its general purpose, as an internal string buffer class.  The name also
  is an homage to Junio Hamano ("gitstr").
  
  The public API remains `git_buf`, and has a much smaller footprint.  It
  is generally only used as an "out" param with strict requirements that
  follow the documentation.  (Exceptions exist for some legacy APIs to
  avoid breaking callers unnecessarily.)
  
  Utility functions exist to convert a user-specified `git_buf` to a
  `git_str` so that we can call internal functions, then converting it
  back again.
  

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• tests/network/remote/defaultbranch.c

• #include "clar_libgit2.h"
  #include "refspec.h"
  #include "remote.h"
  
  static git_remote *g_remote;
  static git_repository *g_repo_a, *g_repo_b;
  
  void test_network_remote_defaultbranch__initialize(void)
  {
  	g_repo_a = cl_git_sandbox_init("testrepo.git");
  	cl_git_pass(git_repository_init(&g_repo_b, "repo-b.git", true));
  	cl_git_pass(git_remote_create(&g_remote, g_repo_b, "origin", git_repository_path(g_repo_a)));
  }
  
  void test_network_remote_defaultbranch__cleanup(void)
  {
  	git_remote_free(g_remote);
  	git_repository_free(g_repo_b);
  
  	cl_git_sandbox_cleanup();
  	cl_fixture_cleanup("repo-b.git");
  }
  
  static void assert_default_branch(const char *should)
  {
  	git_buf name = GIT_BUF_INIT;
  
  	cl_git_pass(git_remote_connect(g_remote, GIT_DIRECTION_FETCH, NULL, NULL, NULL));
  	cl_git_pass(git_remote_default_branch(&name, g_remote));
  	cl_assert_equal_s(should, name.ptr);
  	git_buf_dispose(&name);
  }
  
  void test_network_remote_defaultbranch__master(void)
  {
  	assert_default_branch("refs/heads/master");
  }
  
  void test_network_remote_defaultbranch__master_does_not_win(void)
  {
  	cl_git_pass(git_repository_set_head(g_repo_a, "refs/heads/not-good"));
  	assert_default_branch("refs/heads/not-good");
  }
  
  void test_network_remote_defaultbranch__master_on_detached(void)
  {
  	cl_git_pass(git_repository_detach_head(g_repo_a));
  	assert_default_branch("refs/heads/master");
  }
  
  void test_network_remote_defaultbranch__no_default_branch(void)
  {
  	git_remote *remote_b;
  	const git_remote_head **heads;
  	size_t len;
  	git_buf buf = GIT_BUF_INIT;
  
  	cl_git_pass(git_remote_create(&remote_b, g_repo_b, "self", git_repository_path(g_repo_b)));
  	cl_git_pass(git_remote_connect(remote_b, GIT_DIRECTION_FETCH, NULL, NULL, NULL));
  	cl_git_pass(git_remote_ls(&heads, &len, remote_b));
  	cl_assert_equal_i(0, len);
  
  	cl_git_fail_with(GIT_ENOTFOUND, git_remote_default_branch(&buf, remote_b));
  
  	git_remote_free(remote_b);
  }
  
  void test_network_remote_defaultbranch__detached_sharing_nonbranch_id(void)
  {
  	git_oid id, id_cloned;
  	git_reference *ref;
  	git_buf buf = GIT_BUF_INIT;
  	git_repository *cloned_repo;
  
  	cl_git_pass(git_reference_name_to_id(&id, g_repo_a, "HEAD"));
  	cl_git_pass(git_repository_detach_head(g_repo_a));
  	cl_git_pass(git_reference_remove(g_repo_a, "refs/heads/master"));
  	cl_git_pass(git_reference_remove(g_repo_a, "refs/heads/not-good"));
  	cl_git_pass(git_reference_create(&ref, g_repo_a, "refs/foo/bar", &id, 1, NULL));
  	git_reference_free(ref);
  
  	cl_git_pass(git_remote_connect(g_remote, GIT_DIRECTION_FETCH, NULL, NULL, NULL));
  	cl_git_fail_with(GIT_ENOTFOUND, git_remote_default_branch(&buf, g_remote));
  
  	cl_git_pass(git_clone(&cloned_repo, git_repository_path(g_repo_a), "./local-detached", NULL));
  
  	cl_assert(git_repository_head_detached(cloned_repo));
  	cl_git_pass(git_reference_name_to_id(&id_cloned, g_repo_a, "HEAD"));
  	cl_assert(git_oid_equal(&id, &id_cloned));
  
  	git_repository_free(cloned_repo);
  }
  
  void test_network_remote_defaultbranch__unborn_HEAD_with_branches(void)
  {
  	git_reference *ref;
  	git_repository *cloned_repo;
  
  	cl_git_pass(git_reference_symbolic_create(&ref, g_repo_a, "HEAD", "refs/heads/i-dont-exist", 1, NULL));
  	git_reference_free(ref);
  
  	cl_git_pass(git_clone(&cloned_repo, git_repository_path(g_repo_a), "./semi-empty", NULL));
  
  	cl_assert(git_repository_head_unborn(cloned_repo));
  
  	git_repository_free(cloned_repo);
  }
  

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