thodg/libgit2/tests/diff/parse.c

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• Hash : ace3508f
  Author :
  Date : 2017-03-14T10:37:47
  

  patch_generate: fix `git_diff_foreach` only working with generated diffs
  
  The current logic of `git_diff_foreach` makes the assumption that all
  diffs passed in are actually derived from generated diffs. With these
  assumptions we try to derive the actual diff by inspecting either the
  working directory files or blobs of a repository. This obviously cannot
  work for diffs parsed from a file, where we do not necessarily have a
  repository at hand.
  
  Since the introduced split of parsed and generated patches, there are
  multiple functions which help us to handle patches generically, being
  indifferent from where they stem from. Use these functions and remove
  the old logic specific to generated patches. This allows re-using the
  same code for invoking the callbacks on the deltas.
  

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• tests/diff/parse.c

• #include "clar_libgit2.h"
  #include "patch.h"
  #include "patch_parse.h"
  #include "diff_helpers.h"
  #include "../src/diff.h"
  
  #include "../patch/patch_common.h"
  
  void test_diff_parse__cleanup(void)
  {
  	cl_git_sandbox_cleanup();
  }
  
  void test_diff_parse__nonpatches_fail_with_notfound(void)
  {
  	git_diff *diff;
  	const char *not = PATCH_NOT_A_PATCH;
  	const char *not_with_leading = "Leading text.\n" PATCH_NOT_A_PATCH;
  	const char *not_with_trailing = PATCH_NOT_A_PATCH "Trailing text.\n";
  	const char *not_with_both = "Lead.\n" PATCH_NOT_A_PATCH "Trail.\n";
  
  	cl_git_fail_with(GIT_ENOTFOUND,
  		git_diff_from_buffer(&diff,
  		not,
  		strlen(not)));
  	cl_git_fail_with(GIT_ENOTFOUND,
  		git_diff_from_buffer(&diff,
  		not_with_leading,
  		strlen(not_with_leading)));
  	cl_git_fail_with(GIT_ENOTFOUND,
  		git_diff_from_buffer(&diff,
  		not_with_trailing,
  		strlen(not_with_trailing)));
  	cl_git_fail_with(GIT_ENOTFOUND,
  		git_diff_from_buffer(&diff,
  		not_with_both,
  		strlen(not_with_both)));
  }
  
  static void test_parse_invalid_diff(const char *invalid_diff)
  {
  	git_diff *diff;
  	git_buf buf = GIT_BUF_INIT;
  
  	/* throw some random (legitimate) diffs in with the given invalid
  	 * one.
  	 */
  	git_buf_puts(&buf, PATCH_ORIGINAL_TO_CHANGE_FIRSTLINE);
  	git_buf_puts(&buf, PATCH_BINARY_DELTA);
  	git_buf_puts(&buf, invalid_diff);
  	git_buf_puts(&buf, PATCH_ORIGINAL_TO_CHANGE_MIDDLE);
  	git_buf_puts(&buf, PATCH_BINARY_LITERAL);
  
  	cl_git_fail_with(GIT_ERROR,
  		git_diff_from_buffer(&diff, buf.ptr, buf.size));
  
  	git_buf_free(&buf);
  }
  
  void test_diff_parse__invalid_patches_fails(void)
  {
  	test_parse_invalid_diff(PATCH_CORRUPT_MISSING_NEW_FILE);
  	test_parse_invalid_diff(PATCH_CORRUPT_MISSING_OLD_FILE);
  	test_parse_invalid_diff(PATCH_CORRUPT_NO_CHANGES);
  	test_parse_invalid_diff(PATCH_CORRUPT_MISSING_HUNK_HEADER);
  }
  
  static void test_tree_to_tree_computed_to_parsed(
  	const char *sandbox, const char *a_id, const char *b_id,
  	uint32_t diff_flags, uint32_t find_flags)
  {
  	git_repository *repo;
  	git_diff *computed, *parsed;
  	git_tree *a, *b;
  	git_diff_options opts = GIT_DIFF_OPTIONS_INIT;
  	git_diff_find_options findopts = GIT_DIFF_FIND_OPTIONS_INIT;
  	git_buf computed_buf = GIT_BUF_INIT;
  
  	repo = cl_git_sandbox_init(sandbox);
  
  	opts.id_abbrev = GIT_OID_HEXSZ;
  	opts.flags = GIT_DIFF_SHOW_BINARY | diff_flags;
  	findopts.flags = find_flags;
  
  	cl_assert((a = resolve_commit_oid_to_tree(repo, a_id)) != NULL);
  	cl_assert((b = resolve_commit_oid_to_tree(repo, b_id)) != NULL);
  
  	cl_git_pass(git_diff_tree_to_tree(&computed, repo, a, b, &opts));
  
  	if (find_flags)
  		cl_git_pass(git_diff_find_similar(computed, &findopts));
  
  	cl_git_pass(git_diff_to_buf(&computed_buf,
  		computed, GIT_DIFF_FORMAT_PATCH));
  
  	cl_git_pass(git_diff_from_buffer(&parsed,
  		computed_buf.ptr, computed_buf.size));
  
  	diff_assert_equal(computed, parsed);
  
  	git_tree_free(a);
  	git_tree_free(b);
  
  	git_diff_free(computed);
  	git_diff_free(parsed);
  
  	git_buf_free(&computed_buf);
  
  	cl_git_sandbox_cleanup();
  }
  
  void test_diff_parse__can_parse_generated_diff(void)
  {
  	test_tree_to_tree_computed_to_parsed(
  		"diff", "d70d245e", "7a9e0b02", 0, 0);
  	test_tree_to_tree_computed_to_parsed(
  		"unsymlinked.git", "806999", "a8595c", 0, 0);
  	test_tree_to_tree_computed_to_parsed("diff",
  		"d70d245ed97ed2aa596dd1af6536e4bfdb047b69",
  		"7a9e0b02e63179929fed24f0a3e0f19168114d10", 0, 0);
  	test_tree_to_tree_computed_to_parsed(
  		"unsymlinked.git", "7fccd7", "806999", 0, 0);
  	test_tree_to_tree_computed_to_parsed(
  		"unsymlinked.git", "7fccd7", "a8595c", 0, 0);
  	test_tree_to_tree_computed_to_parsed(
  		"attr", "605812a", "370fe9ec22", 0, 0);
  	test_tree_to_tree_computed_to_parsed(
  		"attr", "f5b0af1fb4f5c", "370fe9ec22", 0, 0);
  	test_tree_to_tree_computed_to_parsed(
  		"diff", "d70d245e", "d70d245e", 0, 0);
  	test_tree_to_tree_computed_to_parsed("diff_format_email",
  		"873806f6f27e631eb0b23e4b56bea2bfac14a373",
  		"897d3af16ca9e420cd071b1c4541bd2b91d04c8c",
  		GIT_DIFF_SHOW_BINARY, 0);
  	test_tree_to_tree_computed_to_parsed("diff_format_email",
  		"897d3af16ca9e420cd071b1c4541bd2b91d04c8c",
  		"873806f6f27e631eb0b23e4b56bea2bfac14a373",
  		GIT_DIFF_SHOW_BINARY, 0);
  	test_tree_to_tree_computed_to_parsed("renames",
  		"31e47d8c1fa36d7f8d537b96158e3f024de0a9f2",
  		"2bc7f351d20b53f1c72c16c4b036e491c478c49a",
  		0, GIT_DIFF_FIND_RENAMES);
  	test_tree_to_tree_computed_to_parsed("renames",
  		"31e47d8c1fa36d7f8d537b96158e3f024de0a9f2",
  		"2bc7f351d20b53f1c72c16c4b036e491c478c49a",
  		GIT_DIFF_INCLUDE_UNMODIFIED,
  		0);
  	test_tree_to_tree_computed_to_parsed("renames",
  		"31e47d8c1fa36d7f8d537b96158e3f024de0a9f2",
  		"2bc7f351d20b53f1c72c16c4b036e491c478c49a",
  		GIT_DIFF_INCLUDE_UNMODIFIED,
  		GIT_DIFF_FIND_COPIES_FROM_UNMODIFIED | GIT_DIFF_FIND_EXACT_MATCH_ONLY);
  }
  
  void test_diff_parse__get_patch_from_diff(void)
  {
  	git_repository *repo;
  	git_diff *computed, *parsed;
  	git_tree *a, *b;
  	git_diff_options opts = GIT_DIFF_OPTIONS_INIT;
  	git_buf computed_buf = GIT_BUF_INIT;
  	git_patch *patch_computed, *patch_parsed;
  
  	repo = cl_git_sandbox_init("diff");
  
  	opts.flags = GIT_DIFF_SHOW_BINARY;
  
  	cl_assert((a = resolve_commit_oid_to_tree(repo,
  		"d70d245ed97ed2aa596dd1af6536e4bfdb047b69")) != NULL);
  	cl_assert((b = resolve_commit_oid_to_tree(repo,
  		"7a9e0b02e63179929fed24f0a3e0f19168114d10")) != NULL);
  
  	cl_git_pass(git_diff_tree_to_tree(&computed, repo, a, b, &opts));
  	cl_git_pass(git_diff_to_buf(&computed_buf,
  		computed, GIT_DIFF_FORMAT_PATCH));
  	cl_git_pass(git_patch_from_diff(&patch_computed, computed, 0));
  
  	cl_git_pass(git_diff_from_buffer(&parsed,
  		computed_buf.ptr, computed_buf.size));
  	cl_git_pass(git_patch_from_diff(&patch_parsed, parsed, 0));
  
  	cl_assert_equal_i(
  		git_patch_num_hunks(patch_computed),
  		git_patch_num_hunks(patch_parsed));
  
  	git_patch_free(patch_computed);
  	git_patch_free(patch_parsed);
  
  	git_tree_free(a);
  	git_tree_free(b);
  
  	git_diff_free(computed);
  	git_diff_free(parsed);
  
  	git_buf_free(&computed_buf);
  
  	cl_git_sandbox_cleanup();
  }
  
  static int file_cb(const git_diff_delta *delta, float progress, void *payload)
  {
      int *called = (int *) payload;
      GIT_UNUSED(delta);
      GIT_UNUSED(progress);
      (*called)++;
      return 0;
  }
  
  void test_diff_parse__foreach_works_with_parsed_patch(void)
  {
  	const char patch[] =
  	    "diff --git a/obj1 b/obj2\n"
  	    "index 1234567..7654321 10644\n"
  	    "--- a/obj1\n"
  	    "+++ b/obj2\n"
  	    "@@ -1 +1 @@\n"
  	    "-abcde\n"
  	    "+12345\n";
  	int called = 0;
  	git_diff *diff;
  
  	cl_git_pass(git_diff_from_buffer(&diff, patch, strlen(patch)));
  	cl_git_pass(git_diff_foreach(diff, file_cb, NULL, NULL, NULL, &called));
  	cl_assert_equal_i(called, 1);
  
  	git_diff_free(diff);
  }
  

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