thodg/libgit2/tests/diff/parse.c

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• Hash : f9e28026
  Author :
  Date : 2018-06-18T20:37:18
  

  patch_parse: populate line numbers while parsing diffs

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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_dispose(&buf);
  }
  
  void test_diff_parse__exact_rename(void)
  {
  	const char *content =
  	    "---\n"
  	    " old_name.c => new_name.c | 0\n"
  	    " 1 file changed, 0 insertions(+), 0 deletions(-)\n"
  	    " rename old_name.c => new_name.c  (100%)\n"
  	    "\n"
  	    "diff --git a/old_name.c b/new_name.c\n"
  	    "similarity index 100%\n"
  	    "rename from old_name.c\n"
  	    "rename to new_name.c\n"
  	    "-- \n"
  	    "2.9.3\n";
  	git_diff *diff;
  
  	cl_git_pass(git_diff_from_buffer(
  		&diff, content, strlen(content)));
  	git_diff_free(diff);
  }
  
  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_dispose(&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_dispose(&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);
  }
  
  void test_diff_parse__parsing_minimal_patch_succeeds(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"
  	    "-a\n"
  	    "+\n";
  	git_buf buf = GIT_BUF_INIT;
  	git_diff *diff;
  
  	cl_git_pass(git_diff_from_buffer(&diff, patch, strlen(patch)));
  	cl_git_pass(git_diff_to_buf(&buf, diff, GIT_DIFF_FORMAT_PATCH));
  	cl_assert_equal_s(patch, buf.ptr);
  
  	git_diff_free(diff);
  	git_buf_dispose(&buf);
  }
  
  void test_diff_parse__patch_roundtrip_succeeds(void)
  {
  	const char buf1[] = "a\n", buf2[] = "b\n";
  	git_buf patchbuf = GIT_BUF_INIT, diffbuf = GIT_BUF_INIT;
  	git_patch *patch;
  	git_diff *diff;
  
  	cl_git_pass(git_patch_from_buffers(&patch, buf1, strlen(buf1), "obj1", buf2, strlen(buf2), "obj2", NULL));
  	cl_git_pass(git_patch_to_buf(&patchbuf, patch));
  
  	cl_git_pass(git_diff_from_buffer(&diff, patchbuf.ptr, patchbuf.size));
  	cl_git_pass(git_diff_to_buf(&diffbuf, diff, GIT_DIFF_FORMAT_PATCH));
  
  	cl_assert_equal_s(patchbuf.ptr, diffbuf.ptr);
  
  	git_patch_free(patch);
  	git_diff_free(diff);
  	git_buf_dispose(&patchbuf);
  	git_buf_dispose(&diffbuf);
  }
  
  #define cl_assert_equal_i_src(i1,i2,file,line) clar__assert_equal(file,line,#i1 " != " #i2, 1, "%d", (int)(i1), (int)(i2))
  
  static void cl_git_assert_lineinfo_(int old_lineno, int new_lineno, int num_lines, git_patch *patch, size_t hunk_idx, size_t line_idx, const char *file, int lineno)
  {
  	const git_diff_line *line;
  
  	cl_git_expect(git_patch_get_line_in_hunk(&line, patch, hunk_idx, line_idx), 0, file, lineno);
  	cl_assert_equal_i_src(old_lineno, line->old_lineno, file, lineno);
  	cl_assert_equal_i_src(new_lineno, line->new_lineno, file, lineno);
  	cl_assert_equal_i_src(num_lines, line->num_lines, file, lineno);
  }
  
  #define cl_git_assert_lineinfo(old, new, num, p, h, l) \
  	cl_git_assert_lineinfo_(old,new,num,p,h,l,__FILE__,__LINE__)
  
  
  void test_diff_parse__issue4672(void)
  {
  	const char *text = "diff --git a/a b/a\n"
  	"index 7f129fd..af431f2 100644\n"
  	"--- a/a\n"
  	"+++ b/a\n"
  	"@@ -3 +3 @@\n"
  	"-a contents 2\n"
  	"+a contents\n";
  
  	git_diff *diff;
  	git_patch *patch;
  	const git_diff_hunk *hunk;
  	size_t n, l = 0;
  
  	cl_git_pass(git_diff_from_buffer(&diff, text, strlen(text)));
  	cl_git_pass(git_patch_from_diff(&patch, diff, 0));
  	cl_git_pass(git_patch_get_hunk(&hunk, &n, patch, 0));
  
  	cl_git_assert_lineinfo(3, -1, 1, patch, 0, l++);
  	cl_git_assert_lineinfo(-1, 3, 1, patch, 0, l++);
  
  	cl_assert_equal_i(n, l);
  
  	git_patch_free(patch);
  	git_diff_free(diff);
  }
  
  void test_diff_parse__lineinfo(void)
  {
  	const char *text = PATCH_ORIGINAL_TO_CHANGE_MIDDLE;
  	git_diff *diff;
  	git_patch *patch;
  	const git_diff_hunk *hunk;
  	size_t n, l = 0;
  
  	cl_git_pass(git_diff_from_buffer(&diff, text, strlen(text)));
  	cl_git_pass(git_patch_from_diff(&patch, diff, 0));
  	cl_git_pass(git_patch_get_hunk(&hunk, &n, patch, 0));
  
  	cl_git_assert_lineinfo(3, 3, 1, patch, 0, l++);
  	cl_git_assert_lineinfo(4, 4, 1, patch, 0, l++);
  	cl_git_assert_lineinfo(5, 5, 1, patch, 0, l++);
  	cl_git_assert_lineinfo(6, -1, 1, patch, 0, l++);
  	cl_git_assert_lineinfo(-1, 6, 1, patch, 0, l++);
  	cl_git_assert_lineinfo(7, 7, 1, patch, 0, l++);
  	cl_git_assert_lineinfo(8, 8, 1, patch, 0, l++);
  	cl_git_assert_lineinfo(9, 9, 1, patch, 0, l++);
  
  	cl_assert_equal_i(n, l);
  
  	git_patch_free(patch);
  	git_diff_free(diff);
  }
  

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