#include "clar_libgit2.h"

#include "patch.h"

#include "patch_parse.h"

#include "patch_common.h"

static void ensure_patch_validity(git_patch *patch)

{

	const git_diff_delta *delta;

	char idstr[GIT_OID_HEXSZ+1] = {0};

	cl_assert((delta = git_patch_get_delta(patch)) != NULL);

	cl_assert_equal_i(2, delta->nfiles);

	cl_assert_equal_s(delta->old_file.path, "file.txt");

	cl_assert(delta->old_file.mode == GIT_FILEMODE_BLOB);

	cl_assert_equal_i(7, delta->old_file.id_abbrev);

	git_oid_nfmt(idstr, delta->old_file.id_abbrev, &delta->old_file.id);

	cl_assert_equal_s(idstr, "9432026");

	cl_assert_equal_i(0, delta->old_file.size);

	cl_assert_equal_s(delta->new_file.path, "file.txt");

	cl_assert(delta->new_file.mode == GIT_FILEMODE_BLOB);

	cl_assert_equal_i(7, delta->new_file.id_abbrev);

	git_oid_nfmt(idstr, delta->new_file.id_abbrev, &delta->new_file.id);

	cl_assert_equal_s(idstr, "cd8fd12");

	cl_assert_equal_i(0, delta->new_file.size);

}

void test_patch_parse__original_to_change_middle(void)

{

	git_patch *patch;

	cl_git_pass(git_patch_from_buffer(

		&patch, PATCH_ORIGINAL_TO_CHANGE_MIDDLE,

		strlen(PATCH_ORIGINAL_TO_CHANGE_MIDDLE), NULL));

	ensure_patch_validity(patch);

	git_patch_free(patch);

}

void test_patch_parse__leading_and_trailing_garbage(void)

{

	git_patch *patch;

	const char *leading = "This is some leading garbage.\n"

		"Maybe it's email headers?\n"

		"\n"

		PATCH_ORIGINAL_TO_CHANGE_MIDDLE;

	const char *trailing = PATCH_ORIGINAL_TO_CHANGE_MIDDLE

		"\n"

		"This is some trailing garbage.\n"

		"Maybe it's an email signature?\n";

	const char *both = "Here's some leading garbage\n"

		PATCH_ORIGINAL_TO_CHANGE_MIDDLE

		"And here's some trailing.\n";

	cl_git_pass(git_patch_from_buffer(&patch, leading, strlen(leading),

		NULL));

	ensure_patch_validity(patch);

	git_patch_free(patch);

	cl_git_pass(git_patch_from_buffer(&patch, trailing, strlen(trailing),

		NULL));

	ensure_patch_validity(patch);

	git_patch_free(patch);

	cl_git_pass(git_patch_from_buffer(&patch, both, strlen(both),

		NULL));

	ensure_patch_validity(patch);

	git_patch_free(patch);

}

void test_patch_parse__nonpatches_fail_with_notfound(void)

{

	git_patch *patch;

	cl_git_fail_with(GIT_ENOTFOUND,

		git_patch_from_buffer(&patch, PATCH_NOT_A_PATCH,

		strlen(PATCH_NOT_A_PATCH), NULL));

}

void test_patch_parse__invalid_patches_fails(void)

{

	git_patch *patch;

	cl_git_fail_with(GIT_ERROR,

		git_patch_from_buffer(&patch, PATCH_CORRUPT_GIT_HEADER,

		strlen(PATCH_CORRUPT_GIT_HEADER), NULL));

	cl_git_fail_with(GIT_ERROR,

		git_patch_from_buffer(&patch,

		PATCH_CORRUPT_MISSING_NEW_FILE,

		strlen(PATCH_CORRUPT_MISSING_NEW_FILE), NULL));

	cl_git_fail_with(GIT_ERROR,

		git_patch_from_buffer(&patch,

		PATCH_CORRUPT_MISSING_OLD_FILE,

		strlen(PATCH_CORRUPT_MISSING_OLD_FILE), NULL));

	cl_git_fail_with(GIT_ERROR,

		git_patch_from_buffer(&patch, PATCH_CORRUPT_NO_CHANGES,

		strlen(PATCH_CORRUPT_NO_CHANGES), NULL));

	cl_git_fail_with(GIT_ERROR,

		git_patch_from_buffer(&patch,

		PATCH_CORRUPT_MISSING_HUNK_HEADER,

		strlen(PATCH_CORRUPT_MISSING_HUNK_HEADER), NULL));

}