thodg/libgit2/tests/refs/transactions.c

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• Hash : 47531f47
  Author :
  Date : 2019-10-11T12:44:09
  

  refs: unlock unmodified refs on transaction commit
  
  Refs which are locked in a transaction without an altered target,
  still should to be unlocked on `git_transaction_commit`.
  `git_transaction_free` also unlocks refs but the moment of calling of `git_transaction_free`
  cannot be controlled in all situations.
  Some binding libs call `git_transaction_free` on garbage collection or not at all if the
  application exits before and don't provide public access to `git_transaction_free`.
  It is better to release locks as soon as possible.
  

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• tests/refs/transactions.c

• #include "clar_libgit2.h"
  #include "git2/transaction.h"
  
  static git_repository *g_repo;
  static git_transaction *g_tx;
  
  void test_refs_transactions__initialize(void)
  {
     g_repo = cl_git_sandbox_init("testrepo");
     cl_git_pass(git_transaction_new(&g_tx, g_repo));
  }
  
  void test_refs_transactions__cleanup(void)
  {
  	git_transaction_free(g_tx);
  	cl_git_sandbox_cleanup();
  }
  
  void test_refs_transactions__single_ref_oid(void)
  {
  	git_reference *ref;
  	git_oid id;
  
  	git_oid_fromstr(&id, "a65fedf39aefe402d3bb6e24df4d4f5fe4547750");
  
  	cl_git_pass(git_transaction_lock_ref(g_tx, "refs/heads/master"));
  	cl_git_pass(git_transaction_set_target(g_tx, "refs/heads/master", &id, NULL, NULL));
  	cl_git_pass(git_transaction_commit(g_tx));
  
  	cl_git_pass(git_reference_lookup(&ref, g_repo, "refs/heads/master"));
  
  	cl_assert(!git_oid_cmp(&id, git_reference_target(ref)));
  	git_reference_free(ref);
  }
  
  void test_refs_transactions__single_ref_symbolic(void)
  {
  	git_reference *ref;
  
  	cl_git_pass(git_transaction_lock_ref(g_tx, "HEAD"));
  	cl_git_pass(git_transaction_set_symbolic_target(g_tx, "HEAD", "refs/heads/foo", NULL, NULL));
  	cl_git_pass(git_transaction_commit(g_tx));
  
  	cl_git_pass(git_reference_lookup(&ref, g_repo, "HEAD"));
  
  	cl_assert_equal_s("refs/heads/foo", git_reference_symbolic_target(ref));
  	git_reference_free(ref);
  }
  
  void test_refs_transactions__single_ref_mix_types(void)
  {
  	git_reference *ref;
  	git_oid id;
  
  	git_oid_fromstr(&id, "a65fedf39aefe402d3bb6e24df4d4f5fe4547750");
  
  	cl_git_pass(git_transaction_lock_ref(g_tx, "refs/heads/master"));
  	cl_git_pass(git_transaction_lock_ref(g_tx, "HEAD"));
  	cl_git_pass(git_transaction_set_symbolic_target(g_tx, "refs/heads/master", "refs/heads/foo", NULL, NULL));
  	cl_git_pass(git_transaction_set_target(g_tx, "HEAD", &id, NULL, NULL));
  	cl_git_pass(git_transaction_commit(g_tx));
  
  	cl_git_pass(git_reference_lookup(&ref, g_repo, "refs/heads/master"));
  	cl_assert_equal_s("refs/heads/foo", git_reference_symbolic_target(ref));
  	git_reference_free(ref);
  
  	cl_git_pass(git_reference_lookup(&ref, g_repo, "HEAD"));
  	cl_assert(!git_oid_cmp(&id, git_reference_target(ref)));
  	git_reference_free(ref);
  }
  
  void test_refs_transactions__single_ref_delete(void)
  {
  	git_reference *ref;
  
  	cl_git_pass(git_transaction_lock_ref(g_tx, "refs/heads/master"));
  	cl_git_pass(git_transaction_remove(g_tx, "refs/heads/master"));
  	cl_git_pass(git_transaction_commit(g_tx));
  
  	cl_git_fail_with(GIT_ENOTFOUND, git_reference_lookup(&ref, g_repo, "refs/heads/master"));
  }
  
  void test_refs_transactions__single_create(void)
  {
  	git_reference *ref;
  	const char *name = "refs/heads/new-branch";
  	git_oid id;
  
  	cl_git_fail_with(GIT_ENOTFOUND, git_reference_lookup(&ref, g_repo, name));
  
  	cl_git_pass(git_transaction_lock_ref(g_tx, name));
  
  	git_oid_fromstr(&id, "a65fedf39aefe402d3bb6e24df4d4f5fe4547750");
  	cl_git_pass(git_transaction_set_target(g_tx, name, &id, NULL, NULL));
  	cl_git_pass(git_transaction_commit(g_tx));
  
  	cl_git_pass(git_reference_lookup(&ref, g_repo, name));
  	cl_assert(!git_oid_cmp(&id, git_reference_target(ref)));
  	git_reference_free(ref);
  }
  
  void test_refs_transactions__unlocked_set(void)
  {
  	git_oid id;
  
  	cl_git_pass(git_transaction_lock_ref(g_tx, "refs/heads/master"));
  	git_oid_fromstr(&id, "a65fedf39aefe402d3bb6e24df4d4f5fe4547750");
  	cl_git_fail_with(GIT_ENOTFOUND, git_transaction_set_target(g_tx, "refs/heads/foo", &id, NULL, NULL));
  	cl_git_pass(git_transaction_commit(g_tx));
  }
  
  void test_refs_transactions__error_on_locking_locked_ref(void)
  {
  	git_oid id;
  	git_transaction *g_tx_with_lock;
  	git_repository *g_repo_with_locking_tx;
  	const char *g_repo_path = git_repository_path(g_repo);
  	
  	/* prepare a separate transaction in another instance of testrepo and lock master */
  	cl_git_pass(git_repository_open(&g_repo_with_locking_tx, g_repo_path));
  	cl_git_pass(git_transaction_new(&g_tx_with_lock, g_repo_with_locking_tx));
  	cl_git_pass(git_transaction_lock_ref(g_tx_with_lock, "refs/heads/master"));
  
  	/* lock reference for set_target */
  	cl_git_pass(git_oid_fromstr(&id, "a65fedf39aefe402d3bb6e24df4d4f5fe4547750"));
  	cl_git_fail_with(GIT_ELOCKED, git_transaction_lock_ref(g_tx, "refs/heads/master"));
  	cl_git_fail_with(GIT_ENOTFOUND, git_transaction_set_target(g_tx, "refs/heads/master", &id, NULL, NULL));
  
  	git_transaction_free(g_tx_with_lock);
  	git_repository_free(g_repo_with_locking_tx);
  }
  
  void test_refs_transactions__commit_unlocks_unmodified_ref(void)
  {
  	git_transaction *second_tx;
  
  	cl_git_pass(git_transaction_new(&second_tx, g_repo));
  	cl_git_pass(git_transaction_lock_ref(second_tx, "refs/heads/master"));
  	cl_git_pass(git_transaction_commit(second_tx));
  
  	/* a transaction must now be able to get the lock */
  	cl_git_pass(git_transaction_lock_ref(g_tx, "refs/heads/master"));
  
  	git_transaction_free(second_tx);
  }
  
  void test_refs_transactions__free_unlocks_unmodified_ref(void)
  {
  	git_transaction *second_tx;
  
  	cl_git_pass(git_transaction_new(&second_tx, g_repo));
  	cl_git_pass(git_transaction_lock_ref(second_tx, "refs/heads/master"));
  	git_transaction_free(second_tx);
  
  	/* a transaction must now be able to get the lock */
  	cl_git_pass(git_transaction_lock_ref(g_tx, "refs/heads/master"));
  }
  

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