mirror of
https://git.proxmox.com/git/libgit2
synced 2025-05-04 12:14:50 +00:00
b4f5bb0747
This implements the basis for diff rename and copy detection, although it is based on simple SHA comparison right now instead of using a matching algortihm. Just as `git_diff_merge` can be used as a post-pass on diffs to emulate certain command line behaviors, there is a new API `git_diff_detect` which will update a diff list in-place, adjusting some deltas to RENAMED or COPIED state (and also, eventually, splitting MODIFIED deltas where the change is too large into DELETED/ADDED pairs). This also adds a new test repo that will hold rename/copy/split scenarios. Right now, it just has exact-match rename and copy, but the tests are written to use tree diffs, so we should be able to add new test scenarios easily without breaking tests.
313 lines
9.1 KiB
C
313 lines
9.1 KiB
C
#include "clar_libgit2.h"
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#include "diff_helpers.h"
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static git_repository *g_repo = NULL;
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static diff_expects expected;
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static git_diff_options opts;
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static git_blob *d, *alien;
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void test_diff_blob__initialize(void)
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{
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git_oid oid;
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g_repo = cl_git_sandbox_init("attr");
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memset(&opts, 0, sizeof(opts));
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opts.context_lines = 1;
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opts.interhunk_lines = 0;
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memset(&expected, 0, sizeof(expected));
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/* tests/resources/attr/root_test4.txt */
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cl_git_pass(git_oid_fromstrn(&oid, "a0f7217a", 8));
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cl_git_pass(git_blob_lookup_prefix(&d, g_repo, &oid, 4));
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/* alien.png */
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cl_git_pass(git_oid_fromstrn(&oid, "edf3dcee", 8));
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cl_git_pass(git_blob_lookup_prefix(&alien, g_repo, &oid, 4));
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}
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void test_diff_blob__cleanup(void)
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{
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git_blob_free(d);
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git_blob_free(alien);
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cl_git_sandbox_cleanup();
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}
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void test_diff_blob__can_compare_text_blobs(void)
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{
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git_blob *a, *b, *c;
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git_oid a_oid, b_oid, c_oid;
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/* tests/resources/attr/root_test1 */
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cl_git_pass(git_oid_fromstrn(&a_oid, "45141a79", 8));
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cl_git_pass(git_blob_lookup_prefix(&a, g_repo, &a_oid, 4));
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/* tests/resources/attr/root_test2 */
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cl_git_pass(git_oid_fromstrn(&b_oid, "4d713dc4", 8));
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cl_git_pass(git_blob_lookup_prefix(&b, g_repo, &b_oid, 4));
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/* tests/resources/attr/root_test3 */
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cl_git_pass(git_oid_fromstrn(&c_oid, "c96bbb2c2557a832", 16));
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cl_git_pass(git_blob_lookup_prefix(&c, g_repo, &c_oid, 8));
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/* Doing the equivalent of a `git diff -U1` on these files */
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/* diff on tests/resources/attr/root_test1 */
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cl_git_pass(git_diff_blobs(
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a, b, &opts, &expected, diff_file_fn, diff_hunk_fn, diff_line_fn));
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cl_assert_equal_i(1, expected.files);
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cl_assert_equal_i(1, expected.file_status[GIT_DELTA_MODIFIED]);
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cl_assert_equal_i(0, expected.files_binary);
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cl_assert_equal_i(1, expected.hunks);
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cl_assert_equal_i(6, expected.lines);
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cl_assert_equal_i(1, expected.line_ctxt);
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cl_assert_equal_i(5, expected.line_adds);
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cl_assert_equal_i(0, expected.line_dels);
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/* diff on tests/resources/attr/root_test2 */
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memset(&expected, 0, sizeof(expected));
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cl_git_pass(git_diff_blobs(
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b, c, &opts, &expected, diff_file_fn, diff_hunk_fn, diff_line_fn));
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cl_assert_equal_i(1, expected.files);
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cl_assert_equal_i(1, expected.file_status[GIT_DELTA_MODIFIED]);
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cl_assert_equal_i(0, expected.files_binary);
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cl_assert_equal_i(1, expected.hunks);
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cl_assert_equal_i(15, expected.lines);
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cl_assert_equal_i(3, expected.line_ctxt);
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cl_assert_equal_i(9, expected.line_adds);
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cl_assert_equal_i(3, expected.line_dels);
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/* diff on tests/resources/attr/root_test3 */
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memset(&expected, 0, sizeof(expected));
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cl_git_pass(git_diff_blobs(
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a, c, &opts, &expected, diff_file_fn, diff_hunk_fn, diff_line_fn));
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cl_assert_equal_i(1, expected.files);
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cl_assert_equal_i(1, expected.file_status[GIT_DELTA_MODIFIED]);
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cl_assert_equal_i(0, expected.files_binary);
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cl_assert_equal_i(1, expected.hunks);
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cl_assert_equal_i(13, expected.lines);
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cl_assert_equal_i(0, expected.line_ctxt);
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cl_assert_equal_i(12, expected.line_adds);
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cl_assert_equal_i(1, expected.line_dels);
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memset(&expected, 0, sizeof(expected));
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cl_git_pass(git_diff_blobs(
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c, d, &opts, &expected, diff_file_fn, diff_hunk_fn, diff_line_fn));
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cl_assert_equal_i(1, expected.files);
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cl_assert_equal_i(1, expected.file_status[GIT_DELTA_MODIFIED]);
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cl_assert_equal_i(0, expected.files_binary);
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cl_assert_equal_i(2, expected.hunks);
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cl_assert_equal_i(14, expected.lines);
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cl_assert_equal_i(4, expected.line_ctxt);
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cl_assert_equal_i(6, expected.line_adds);
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cl_assert_equal_i(4, expected.line_dels);
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git_blob_free(a);
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git_blob_free(b);
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git_blob_free(c);
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}
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void test_diff_blob__can_compare_against_null_blobs(void)
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{
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git_blob *e = NULL;
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cl_git_pass(git_diff_blobs(
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d, e, &opts, &expected, diff_file_fn, diff_hunk_fn, diff_line_fn));
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cl_assert_equal_i(1, expected.files);
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cl_assert_equal_i(1, expected.file_status[GIT_DELTA_DELETED]);
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cl_assert_equal_i(0, expected.files_binary);
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cl_assert_equal_i(1, expected.hunks);
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cl_assert_equal_i(14, expected.hunk_old_lines);
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cl_assert_equal_i(14, expected.lines);
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cl_assert_equal_i(14, expected.line_dels);
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opts.flags |= GIT_DIFF_REVERSE;
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memset(&expected, 0, sizeof(expected));
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cl_git_pass(git_diff_blobs(
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d, e, &opts, &expected, diff_file_fn, diff_hunk_fn, diff_line_fn));
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cl_assert_equal_i(1, expected.files);
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cl_assert_equal_i(1, expected.file_status[GIT_DELTA_ADDED]);
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cl_assert_equal_i(0, expected.files_binary);
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cl_assert_equal_i(1, expected.hunks);
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cl_assert_equal_i(14, expected.hunk_new_lines);
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cl_assert_equal_i(14, expected.lines);
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cl_assert_equal_i(14, expected.line_adds);
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opts.flags ^= GIT_DIFF_REVERSE;
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memset(&expected, 0, sizeof(expected));
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cl_git_pass(git_diff_blobs(
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alien, NULL, &opts, &expected, diff_file_fn, diff_hunk_fn, diff_line_fn));
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cl_assert_equal_i(1, expected.files);
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cl_assert_equal_i(1, expected.files_binary);
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cl_assert_equal_i(1, expected.file_status[GIT_DELTA_DELETED]);
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cl_assert_equal_i(0, expected.hunks);
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cl_assert_equal_i(0, expected.lines);
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memset(&expected, 0, sizeof(expected));
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cl_git_pass(git_diff_blobs(
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NULL, alien, &opts, &expected, diff_file_fn, diff_hunk_fn, diff_line_fn));
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cl_assert_equal_i(1, expected.files);
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cl_assert_equal_i(1, expected.files_binary);
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cl_assert_equal_i(1, expected.file_status[GIT_DELTA_ADDED]);
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cl_assert_equal_i(0, expected.hunks);
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cl_assert_equal_i(0, expected.lines);
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}
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static void assert_identical_blobs_comparison(diff_expects *expected)
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{
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cl_assert_equal_i(1, expected->files);
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cl_assert_equal_i(1, expected->file_status[GIT_DELTA_UNMODIFIED]);
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cl_assert_equal_i(0, expected->hunks);
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cl_assert_equal_i(0, expected->lines);
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}
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void test_diff_blob__can_compare_identical_blobs(void)
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{
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cl_git_pass(git_diff_blobs(
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d, d, &opts, &expected, diff_file_fn, diff_hunk_fn, diff_line_fn));
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cl_assert_equal_i(0, expected.files_binary);
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assert_identical_blobs_comparison(&expected);
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memset(&expected, 0, sizeof(expected));
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cl_git_pass(git_diff_blobs(
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NULL, NULL, &opts, &expected, diff_file_fn, diff_hunk_fn, diff_line_fn));
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cl_assert_equal_i(0, expected.files_binary);
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assert_identical_blobs_comparison(&expected);
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memset(&expected, 0, sizeof(expected));
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cl_git_pass(git_diff_blobs(
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alien, alien, &opts, &expected, diff_file_fn, diff_hunk_fn, diff_line_fn));
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cl_assert(expected.files_binary > 0);
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assert_identical_blobs_comparison(&expected);
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}
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static void assert_binary_blobs_comparison(diff_expects *expected)
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{
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cl_assert(expected->files_binary > 0);
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cl_assert_equal_i(1, expected->files);
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cl_assert_equal_i(1, expected->file_status[GIT_DELTA_MODIFIED]);
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cl_assert_equal_i(0, expected->hunks);
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cl_assert_equal_i(0, expected->lines);
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}
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void test_diff_blob__can_compare_two_binary_blobs(void)
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{
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git_blob *heart;
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git_oid h_oid;
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/* heart.png */
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cl_git_pass(git_oid_fromstrn(&h_oid, "de863bff", 8));
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cl_git_pass(git_blob_lookup_prefix(&heart, g_repo, &h_oid, 4));
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cl_git_pass(git_diff_blobs(
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alien, heart, &opts, &expected, diff_file_fn, diff_hunk_fn, diff_line_fn));
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assert_binary_blobs_comparison(&expected);
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memset(&expected, 0, sizeof(expected));
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cl_git_pass(git_diff_blobs(
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heart, alien, &opts, &expected, diff_file_fn, diff_hunk_fn, diff_line_fn));
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assert_binary_blobs_comparison(&expected);
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git_blob_free(heart);
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}
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void test_diff_blob__can_compare_a_binary_blob_and_a_text_blob(void)
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{
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cl_git_pass(git_diff_blobs(
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alien, d, &opts, &expected, diff_file_fn, diff_hunk_fn, diff_line_fn));
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assert_binary_blobs_comparison(&expected);
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memset(&expected, 0, sizeof(expected));
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cl_git_pass(git_diff_blobs(
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d, alien, &opts, &expected, diff_file_fn, diff_hunk_fn, diff_line_fn));
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assert_binary_blobs_comparison(&expected);
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}
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/*
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* $ git diff fe773770 a0f7217
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* diff --git a/fe773770 b/a0f7217
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* index fe77377..a0f7217 100644
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* --- a/fe773770
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* +++ b/a0f7217
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* @@ -1,6 +1,6 @@
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* Here is some stuff at the start
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*
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* -This should go in one hunk
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* +This should go in one hunk (first)
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*
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* Some additional lines
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*
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* @@ -8,7 +8,7 @@ Down here below the other lines
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*
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* With even more at the end
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*
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* -Followed by a second hunk of stuff
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* +Followed by a second hunk of stuff (second)
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*
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* That happens down here
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*/
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void test_diff_blob__comparing_two_text_blobs_honors_interhunkcontext(void)
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{
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git_blob *old_d;
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git_oid old_d_oid;
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opts.context_lines = 3;
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/* tests/resources/attr/root_test1 from commit f5b0af1 */
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cl_git_pass(git_oid_fromstrn(&old_d_oid, "fe773770", 8));
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cl_git_pass(git_blob_lookup_prefix(&old_d, g_repo, &old_d_oid, 4));
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/* Test with default inter-hunk-context (not set) => default is 0 */
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cl_git_pass(git_diff_blobs(
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old_d, d, &opts, &expected, diff_file_fn, diff_hunk_fn, diff_line_fn));
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cl_assert_equal_i(2, expected.hunks);
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/* Test with inter-hunk-context explicitly set to 0 */
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opts.interhunk_lines = 0;
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memset(&expected, 0, sizeof(expected));
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cl_git_pass(git_diff_blobs(
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old_d, d, &opts, &expected, diff_file_fn, diff_hunk_fn, diff_line_fn));
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cl_assert_equal_i(2, expected.hunks);
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/* Test with inter-hunk-context explicitly set to 1 */
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opts.interhunk_lines = 1;
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memset(&expected, 0, sizeof(expected));
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cl_git_pass(git_diff_blobs(
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old_d, d, &opts, &expected, diff_file_fn, diff_hunk_fn, diff_line_fn));
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cl_assert_equal_i(1, expected.hunks);
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git_blob_free(old_d);
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}
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