thodg/libgit2/tests/object/blob/fromchunks.c

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• Hash : 19853bdd
  Author :
  Date : 2013-12-10T13:01:34
  

  Update git_blob_create_fromchunks callback behavr The callback to supply data chunks could return a negative value to stop creation of the blob, but we were neither using GIT_EUSER nor propagating the return value. This makes things use the new behavior of returning the negative value back to the user.

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• tests/object/blob/fromchunks.c

• #include "clar_libgit2.h"
  #include "buffer.h"
  #include "posix.h"
  #include "path.h"
  #include "fileops.h"
  
  static git_repository *repo;
  static char textual_content[] = "libgit2\n\r\n\0";
  
  void test_object_blob_fromchunks__initialize(void)
  {
  	repo = cl_git_sandbox_init("testrepo.git");
  }
  
  void test_object_blob_fromchunks__cleanup(void)
  {
  	cl_git_sandbox_cleanup();
  }
  
  static int text_chunked_source_cb(char *content, size_t max_length, void *payload)
  {
  	int *count;
  
  	GIT_UNUSED(max_length);
  
  	count = (int *)payload;
  	(*count)--;
  
  	if (*count == 0)
  		return 0;
  
  	strcpy(content, textual_content);
  	return (int)strlen(textual_content);
  }
  
  void test_object_blob_fromchunks__can_create_a_blob_from_a_in_memory_chunk_provider(void)
  {
  	git_oid expected_oid, oid;
  	git_object *blob;
  	int howmany = 7;
  
  	cl_git_pass(git_oid_fromstr(&expected_oid, "321cbdf08803c744082332332838df6bd160f8f9"));
  
  	cl_git_fail_with(
  		git_object_lookup(&blob, repo, &expected_oid, GIT_OBJ_ANY),
  		GIT_ENOTFOUND);
  
  	cl_git_pass(git_blob_create_fromchunks(&oid, repo, NULL, text_chunked_source_cb, &howmany));
  
  	cl_git_pass(git_object_lookup(&blob, repo, &expected_oid, GIT_OBJ_ANY));
  	cl_assert(git_oid_cmp(&expected_oid, git_object_id(blob)) == 0);
  
  	git_object_free(blob);
  }
  
  void test_object_blob_fromchunks__doesnot_overwrite_an_already_existing_object(void)
  {
  	git_buf path = GIT_BUF_INIT;
  	git_buf content = GIT_BUF_INIT;
  	git_oid expected_oid, oid;
  	int howmany = 7;
  
  	cl_git_pass(git_oid_fromstr(&expected_oid, "321cbdf08803c744082332332838df6bd160f8f9"));
  
  	cl_git_pass(git_blob_create_fromchunks(&oid, repo, NULL, text_chunked_source_cb, &howmany));
  
  	/* Let's replace the content of the blob file storage with something else... */
  	cl_git_pass(git_buf_joinpath(&path, git_repository_path(repo), "objects/32/1cbdf08803c744082332332838df6bd160f8f9"));
  	cl_git_pass(p_unlink(git_buf_cstr(&path)));
  	cl_git_mkfile(git_buf_cstr(&path), "boom");
  
  	/* ...request a creation of the same blob... */
  	howmany = 7;
  	cl_git_pass(git_blob_create_fromchunks(&oid, repo, NULL, text_chunked_source_cb, &howmany));
  
  	/* ...and ensure the content of the faked blob file hasn't been altered */
  	cl_git_pass(git_futils_readbuffer(&content, git_buf_cstr(&path)));
  	cl_assert(!git__strcmp("boom", git_buf_cstr(&content)));
  
  	git_buf_free(&path);
  	git_buf_free(&content);
  }
  
  #define GITATTR "* text=auto\n" \
  	"*.txt text\n" \
  	"*.data binary\n"
  
  static void write_attributes(git_repository *repo)
  {
  	git_buf buf = GIT_BUF_INIT;
  
  	cl_git_pass(git_buf_joinpath(&buf, git_repository_path(repo), "info"));
  	cl_git_pass(git_buf_joinpath(&buf, git_buf_cstr(&buf), "attributes"));
  
  	cl_git_pass(git_futils_mkpath2file(git_buf_cstr(&buf), 0777));
  	cl_git_rewritefile(git_buf_cstr(&buf), GITATTR);
  
  	git_buf_free(&buf);
  }
  
  static void assert_named_chunked_blob(const char *expected_sha, const char *fake_name)
  {
  	git_oid expected_oid, oid;
  	int howmany = 7;
  
  	cl_git_pass(git_oid_fromstr(&expected_oid, expected_sha));
  
  	cl_git_pass(git_blob_create_fromchunks(&oid, repo, fake_name, text_chunked_source_cb, &howmany));
  	cl_assert(git_oid_cmp(&expected_oid, &oid) == 0);
  }
  
  void test_object_blob_fromchunks__creating_a_blob_from_chunks_honors_the_attributes_directives(void)
  {
  	write_attributes(repo);
  
  	assert_named_chunked_blob("321cbdf08803c744082332332838df6bd160f8f9", "dummy.data");
  	assert_named_chunked_blob("e9671e138a780833cb689753570fd10a55be84fb", "dummy.txt");
  	assert_named_chunked_blob("e9671e138a780833cb689753570fd10a55be84fb", "dummy.dunno");
  }
  
  static int failing_chunked_source_cb(
  	char *content, size_t max_length, void *payload)
  {
  	int *count = (int *)payload;
  
  	GIT_UNUSED(max_length);
  
  	(*count)--;
  	if (*count == 0)
  		return -1234;
  
  	strcpy(content, textual_content);
  	return (int)strlen(textual_content);
  }
  
  void test_object_blob_fromchunks__can_stop_with_error(void)
  {
  	git_oid expected_oid, oid;
  	git_object *blob;
  	int howmany = 7;
  
  	cl_git_pass(git_oid_fromstr(
  		&expected_oid, "321cbdf08803c744082332332838df6bd160f8f9"));
  
  	cl_git_fail_with(
  		git_object_lookup(&blob, repo, &expected_oid, GIT_OBJ_ANY),
  		GIT_ENOTFOUND);
  
  	cl_git_fail_with(git_blob_create_fromchunks(
  		&oid, repo, NULL, failing_chunked_source_cb, &howmany), -1234);
  
  	cl_git_fail_with(
  		git_object_lookup(&blob, repo, &expected_oid, GIT_OBJ_ANY),
  		GIT_ENOTFOUND);
  }
  
  

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