thodg/libgit2/tests-clar/diff/rename.c

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• Hash : db106d01
  Author :
  Date : 2012-10-30T09:40:50
  

  Move rename detection into new file This improves the naming for the rename related functionality moving it to be called `git_diff_find_similar()` and renaming all the associated constants, etc. to make more sense. I also moved the new code (plus the existing `git_diff_merge`) into a new file `diff_tform.c` where I can put new functions related to manipulating git diff lists. This also updates the implementation significantly from the last revision fixing some ordering issues (where break-rewrite needs to be handled prior to copy and rename detection) and improving config option handling.

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• tests-clar/diff/rename.c

• #include "clar_libgit2.h"
  #include "diff_helpers.h"
  
  static git_repository *g_repo = NULL;
  
  void test_diff_rename__initialize(void)
  {
  	g_repo = cl_git_sandbox_init("renames");
  }
  
  void test_diff_rename__cleanup(void)
  {
  	cl_git_sandbox_cleanup();
  }
  
  /*
   * Renames repo has:
   *
   * commit 31e47d8c1fa36d7f8d537b96158e3f024de0a9f2 -
   *   serving.txt     (25 lines)
   *   sevencities.txt (50 lines)
   * commit 2bc7f351d20b53f1c72c16c4b036e491c478c49a -
   *   serving.txt     -> sixserving.txt  (rename, no change, 100% match)
   *   sevencities.txt -> sevencities.txt (no change)
   *   sevencities.txt -> songofseven.txt (copy, no change, 100% match)
   *
   * TODO: add commits with various % changes of copy / rename
   */
  
  void test_diff_rename__match_oid(void)
  {
  	const char *old_sha = "31e47d8c1fa36d7f8d537b96158e3f024de0a9f2";
  	const char *new_sha = "2bc7f351d20b53f1c72c16c4b036e491c478c49a";
  	git_tree *old_tree, *new_tree;
  	git_diff_list *diff;
  	git_diff_options diffopts = {0};
  	git_diff_find_options opts;
  	diff_expects exp;
  
  	old_tree = resolve_commit_oid_to_tree(g_repo, old_sha);
  	new_tree = resolve_commit_oid_to_tree(g_repo, new_sha);
  
  	/* Must pass GIT_DIFF_INCLUDE_UNMODIFIED if you expect to emulate
  	 * --find-copies-harder during rename transformion...
  	 */
  	memset(&diffopts, 0, sizeof(diffopts));
  	diffopts.flags |= GIT_DIFF_INCLUDE_UNMODIFIED;
  
  	cl_git_pass(git_diff_tree_to_tree(
  		g_repo, &diffopts, old_tree, new_tree, &diff));
  
  	/* git diff --no-renames \
  	 *          31e47d8c1fa36d7f8d537b96158e3f024de0a9f2 \
  	 *          2bc7f351d20b53f1c72c16c4b036e491c478c49a
  	 */
  	memset(&exp, 0, sizeof(exp));
  	cl_git_pass(git_diff_foreach(
  		diff, &exp, diff_file_fn, diff_hunk_fn, diff_line_fn));
  
  	cl_assert_equal_i(4, exp.files);
  	cl_assert_equal_i(1, exp.file_status[GIT_DELTA_UNMODIFIED]);
  	cl_assert_equal_i(2, exp.file_status[GIT_DELTA_ADDED]);
  	cl_assert_equal_i(1, exp.file_status[GIT_DELTA_DELETED]);
  
  	/* git diff 31e47d8c1fa36d7f8d537b96158e3f024de0a9f2 \
  	 *          2bc7f351d20b53f1c72c16c4b036e491c478c49a
  	 */
  	cl_git_pass(git_diff_find_similar(diff, NULL));
  
  	memset(&exp, 0, sizeof(exp));
  	cl_git_pass(git_diff_foreach(
  		diff, &exp, diff_file_fn, diff_hunk_fn, diff_line_fn));
  
  	cl_assert_equal_i(3, exp.files);
  	cl_assert_equal_i(1, exp.file_status[GIT_DELTA_UNMODIFIED]);
  	cl_assert_equal_i(1, exp.file_status[GIT_DELTA_ADDED]);
  	cl_assert_equal_i(1, exp.file_status[GIT_DELTA_RENAMED]);
  
  	git_diff_list_free(diff);
  
  	cl_git_pass(git_diff_tree_to_tree(
  		g_repo, &diffopts, old_tree, new_tree, &diff));
  
  	/* git diff --find-copies-harder \
  	 *          31e47d8c1fa36d7f8d537b96158e3f024de0a9f2 \
  	 *          2bc7f351d20b53f1c72c16c4b036e491c478c49a
  	 */
  	memset(&opts, 0, sizeof(opts));
  	opts.flags = GIT_DIFF_FIND_COPIES_FROM_UNMODIFIED;
  	cl_git_pass(git_diff_find_similar(diff, &opts));
  
  	memset(&exp, 0, sizeof(exp));
  	cl_git_pass(git_diff_foreach(
  		diff, &exp, diff_file_fn, diff_hunk_fn, diff_line_fn));
  
  	cl_assert_equal_i(3, exp.files);
  	cl_assert_equal_i(1, exp.file_status[GIT_DELTA_UNMODIFIED]);
  	cl_assert_equal_i(1, exp.file_status[GIT_DELTA_COPIED]);
  	cl_assert_equal_i(1, exp.file_status[GIT_DELTA_RENAMED]);
  
  	git_diff_list_free(diff);
  
  	git_tree_free(old_tree);
  	git_tree_free(new_tree);
  }
  

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