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#include "clar_libgit2.h"
#include "../checkout/checkout_helpers.h"
#include "index.h"
#include "repository.h"
static git_repository *g_repo;
void test_diff_externalmodifications__initialize(void)
{
g_repo = cl_git_sandbox_init("testrepo2");
}
void test_diff_externalmodifications__cleanup(void)
{
cl_git_sandbox_cleanup();
g_repo = NULL;
}
void test_diff_externalmodifications__file_becomes_smaller(void)
{
git_index *index;
git_diff *diff;
git_patch* patch;
git_str path = GIT_STR_INIT;
char big_string[500001];
cl_git_pass(git_str_joinpath(&path, git_repository_workdir(g_repo), "README"));
/* Modify the file with a large string */
memset(big_string, '\n', sizeof(big_string) - 1);
big_string[sizeof(big_string) - 1] = '\0';
cl_git_mkfile(path.ptr, big_string);
/* Get a diff */
cl_git_pass(git_repository_index(&index, g_repo));
cl_git_pass(git_diff_index_to_workdir(&diff, g_repo, index, NULL));
cl_assert_equal_i(1, git_diff_num_deltas(diff));
cl_assert_equal_i(500000, git_diff_get_delta(diff, 0)->new_file.size);
/* Simulate file modification after we've gotten the diff.
* Write a shorter string to ensure that we don't mmap 500KB from
* the previous revision, which would most likely crash. */
cl_git_mkfile(path.ptr, "hello");
/* Attempt to get a patch */
cl_git_fail(git_patch_from_diff(&patch, diff, 0));
git_index_free(index);
git_diff_free(diff);
git_str_dispose(&path);
}
void test_diff_externalmodifications__file_becomes_empty(void)
{
git_index *index;
git_diff *diff;
git_patch* patch;
git_str path = GIT_STR_INIT;
cl_git_pass(git_str_joinpath(&path, git_repository_workdir(g_repo), "README"));
/* Modify the file */
cl_git_mkfile(path.ptr, "hello");
/* Get a diff */
cl_git_pass(git_repository_index(&index, g_repo));
cl_git_pass(git_diff_index_to_workdir(&diff, g_repo, index, NULL));
cl_assert_equal_i(1, git_diff_num_deltas(diff));
cl_assert_equal_i(5, git_diff_get_delta(diff, 0)->new_file.size);
/* Empty out the file after we've gotten the diff */
cl_git_mkfile(path.ptr, "");
/* Attempt to get a patch */
cl_git_fail(git_patch_from_diff(&patch, diff, 0));
git_index_free(index);
git_diff_free(diff);
git_str_dispose(&path);
}
void test_diff_externalmodifications__file_deleted(void)
{
git_index *index;
git_diff *diff;
git_patch* patch;
git_str path = GIT_STR_INIT;
cl_git_pass(git_str_joinpath(&path, git_repository_workdir(g_repo), "README"));
/* Get a diff */
cl_git_pass(git_repository_index(&index, g_repo));
cl_git_pass(git_diff_index_to_workdir(&diff, g_repo, index, NULL));
cl_assert_equal_i(0, git_diff_num_deltas(diff));
/* Delete the file */
cl_git_rmfile(path.ptr);
/* Attempt to get a patch */
cl_git_fail(git_patch_from_diff(&patch, diff, 0));
git_index_free(index);
git_diff_free(diff);
git_str_dispose(&path);
}
void test_diff_externalmodifications__empty_file_becomes_non_empty(void)
{
git_index *index;
git_diff *diff;
git_patch* patch;
git_str path = GIT_STR_INIT;
cl_git_pass(git_str_joinpath(&path, git_repository_workdir(g_repo), "README"));
/* Empty out the file */
cl_git_mkfile(path.ptr, "");
/* Get a diff */
cl_git_pass(git_repository_index(&index, g_repo));
cl_git_pass(git_diff_index_to_workdir(&diff, g_repo, index, NULL));
cl_assert_equal_i(1, git_diff_num_deltas(diff));
cl_assert_equal_i(0, git_diff_get_delta(diff, 0)->new_file.size);
/* Simulate file modification after we've gotten the diff */
cl_git_mkfile(path.ptr, "hello");
cl_git_fail(git_patch_from_diff(&patch, diff, 0));
git_index_free(index);
git_diff_free(diff);
git_str_dispose(&path);
}
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