thodg/libgit2/tests/str/splice.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/str/splice.c

• #include "clar_libgit2.h"
  
  static git_str _buf;
  
  void test_str_splice__initialize(void) {
     git_str_init(&_buf, 16);
  }
  
  void test_str_splice__cleanup(void) {
     git_str_dispose(&_buf);
  }
  
  void test_str_splice__preprend(void)
  {
  	git_str_sets(&_buf, "world!");
  
  	cl_git_pass(git_str_splice(&_buf, 0, 0, "Hello Dolly", strlen("Hello ")));
  
  	cl_assert_equal_s("Hello world!", git_str_cstr(&_buf));
  }
  
  void test_str_splice__append(void)
  {
  	git_str_sets(&_buf, "Hello");
  
  	cl_git_pass(git_str_splice(&_buf, git_str_len(&_buf), 0, " world!", strlen(" world!")));
  
  	cl_assert_equal_s("Hello world!", git_str_cstr(&_buf));
  }
  
  void test_str_splice__insert_at(void)
  {
  	git_str_sets(&_buf, "Hell world!");
  
  	cl_git_pass(git_str_splice(&_buf, strlen("Hell"), 0, "o", strlen("o")));
  
  	cl_assert_equal_s("Hello world!", git_str_cstr(&_buf));
  }
  
  void test_str_splice__remove_at(void)
  {
  	git_str_sets(&_buf, "Hello world of warcraft!");
  
  	cl_git_pass(git_str_splice(&_buf, strlen("Hello world"), strlen(" of warcraft"), "", 0));
  
  	cl_assert_equal_s("Hello world!", git_str_cstr(&_buf));
  }
  
  void test_str_splice__replace(void)
  {
  	git_str_sets(&_buf, "Hell0 w0rld!");
  
  	cl_git_pass(git_str_splice(&_buf, strlen("Hell"), strlen("0 w0"), "o wo", strlen("o wo")));
  
  	cl_assert_equal_s("Hello world!", git_str_cstr(&_buf));
  }
  
  void test_str_splice__replace_with_longer(void)
  {
  	git_str_sets(&_buf, "Hello you!");
  
  	cl_git_pass(git_str_splice(&_buf, strlen("Hello "), strlen("you"), "world", strlen("world")));
  
  	cl_assert_equal_s("Hello world!", git_str_cstr(&_buf));
  }
  
  void test_str_splice__replace_with_shorter(void)
  {
  	git_str_sets(&_buf, "Brave new world!");
  
  	cl_git_pass(git_str_splice(&_buf, 0, strlen("Brave new"), "Hello", strlen("Hello")));
  
  	cl_assert_equal_s("Hello world!", git_str_cstr(&_buf));
  }
  
  void test_str_splice__truncate(void)
  {
  	git_str_sets(&_buf, "Hello world!!");
  
  	cl_git_pass(git_str_splice(&_buf, strlen("Hello world!"), strlen("!"), "", 0));
  
  	cl_assert_equal_s("Hello world!", git_str_cstr(&_buf));
  }
  
  void test_str_splice__dont_do_anything(void)
  {
  	git_str_sets(&_buf, "Hello world!");
  
  	cl_git_pass(git_str_splice(&_buf, 3, 0, "Hello", 0));
  
  	cl_assert_equal_s("Hello world!", git_str_cstr(&_buf));
  }
  

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