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

• #include "clar_libgit2.h"
  #include "posix.h"
  #include "path.h"
  #include "futils.h"
  
  static git_repository *repo;
  static char textual_content[] = "libgit2\n\r\n\0";
  
  void test_object_blob_fromstream__initialize(void)
  {
  	repo = cl_git_sandbox_init("testrepo.git");
  }
  
  void test_object_blob_fromstream__cleanup(void)
  {
  	cl_git_sandbox_cleanup();
  }
  
  void test_object_blob_fromstream__multiple_write(void)
  {
  	git_oid expected_id, id;
  	git_object *blob;
  	git_writestream *stream;
  	int i, howmany = 6;
  
  	cl_git_pass(git_oid_fromstr(&expected_id, "321cbdf08803c744082332332838df6bd160f8f9"));
  
  	cl_git_fail_with(GIT_ENOTFOUND,
  			 git_object_lookup(&blob, repo, &expected_id, GIT_OBJECT_ANY));
  
  	cl_git_pass(git_blob_create_from_stream(&stream, repo, NULL));
  
  	for (i = 0; i < howmany; i++)
  		cl_git_pass(stream->write(stream, textual_content, strlen(textual_content)));
  
  	cl_git_pass(git_blob_create_from_stream_commit(&id, stream));
  	cl_assert_equal_oid(&expected_id, &id);
  
  	cl_git_pass(git_object_lookup(&blob, repo, &expected_id, GIT_OBJECT_BLOB));
  
  	git_object_free(blob);
  }
  
  #define GITATTR "* text=auto\n" \
  	"*.txt text\n" \
  	"*.data binary\n"
  
  static void write_attributes(git_repository *repo)
  {
  	git_str buf = GIT_STR_INIT;
  
  	cl_git_pass(git_str_joinpath(&buf, git_repository_path(repo), "info"));
  	cl_git_pass(git_str_joinpath(&buf, git_str_cstr(&buf), "attributes"));
  
  	cl_git_pass(git_futils_mkpath2file(git_str_cstr(&buf), 0777));
  	cl_git_rewritefile(git_str_cstr(&buf), GITATTR);
  
  	git_str_dispose(&buf);
  }
  
  static void assert_named_chunked_blob(const char *expected_sha, const char *fake_name)
  {
  	git_oid expected_id, id;
  	git_writestream *stream;
  	int i, howmany = 6;
  
  	cl_git_pass(git_oid_fromstr(&expected_id, expected_sha));
  
  	cl_git_pass(git_blob_create_from_stream(&stream, repo, fake_name));
  
  	for (i = 0; i < howmany; i++)
  		cl_git_pass(stream->write(stream, textual_content, strlen(textual_content)));
  
  	cl_git_pass(git_blob_create_from_stream_commit(&id, stream));
  
  	cl_assert_equal_oid(&expected_id, &id);
  }
  
  void test_object_blob_fromstream__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");
  }
  

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