Add filter tests and fix some bugs

This adds some initial unit tests for file filtering and fixes
some simple bugs in filter application.

1 files changed, 125 insertions, 0 deletions

diff --git a/tests-clar/object/blob/filter.c b/tests-clar/object/blob/filter.c
new file mode 100644
index 000000000..0b87b2b46
--- /dev/null
+++ b/tests-clar/object/blob/filter.c
@@ -0,0 +1,125 @@
+#include "clar_libgit2.h"
+#include "posix.h"
+#include "blob.h"
+#include "filter.h"
+
+static git_repository *g_repo = NULL;
+#define NUM_TEST_OBJECTS 6
+static git_oid g_oids[NUM_TEST_OBJECTS];
+static const char *g_raw[NUM_TEST_OBJECTS] = {
+	"",
+	"foo\nbar\n",
+	"foo\rbar\r",
+	"foo\r\nbar\r\n",
+	"foo\nbar\rboth\r\nreversed\n\ragain\nproblems\r",
+	"123\n\000\001\002\003\004abc\255\254\253\r\n"
+};
+static int g_len[NUM_TEST_OBJECTS] = { -1, -1, -1, -1, -1, 17 };
+static git_text_stats g_stats[NUM_TEST_OBJECTS] = {
+	{ 0, 0, 0, 0, 0, 0 },
+	{ 0, 0, 2, 0, 6, 0 },
+	{ 0, 2, 0, 0, 6, 0 },
+	{ 0, 2, 2, 2, 6, 0 },
+	{ 0, 4, 4, 1, 31, 0 },
+	{ 1, 1, 2, 1, 9, 5 }
+};
+static git_buf g_crlf_filtered[NUM_TEST_OBJECTS] = {
+	{ "", 0, 0 },
+	{ "foo\nbar\n", 0, 8 },
+	{ "foo\rbar\r", 0, 8 },
+	{ "foo\nbar\n", 0, 8 },
+	{ "foo\nbar\rboth\nreversed\n\ragain\nproblems\r", 0, 38 },
+	{ "123\n\000\001\002\003\004abc\255\254\253\n", 0, 16 }
+};
+
+void test_object_blob_filter__initialize(void)
+{
+	int i;
+
+	cl_fixture_sandbox("empty_standard_repo");
+	cl_git_pass(p_rename(
+		"empty_standard_repo/.gitted", "empty_standard_repo/.git"));
+	cl_git_pass(git_repository_open(&g_repo, "empty_standard_repo"));
+
+	for (i = 0; i < NUM_TEST_OBJECTS; i++) {
+		size_t len = (g_len[i] < 0) ? strlen(g_raw[i]) : (size_t)g_len[i];
+		g_len[i] = (int)len;
+
+		cl_git_pass(
+			git_blob_create_frombuffer(&g_oids[i], g_repo, g_raw[i], len)
+		);
+	}
+}
+
+void test_object_blob_filter__cleanup(void)
+{
+	git_repository_free(g_repo);
+	g_repo = NULL;
+	cl_fixture_cleanup("empty_standard_repo");
+}
+
+void test_object_blob_filter__unfiltered(void)
+{
+	int i;
+	git_blob *blob;
+
+	for (i = 0; i < NUM_TEST_OBJECTS; i++) {
+		cl_git_pass(git_blob_lookup(&blob, g_repo, &g_oids[i]));
+		cl_assert((size_t)g_len[i] == git_blob_rawsize(blob));
+		cl_assert(memcmp(git_blob_rawcontent(blob), g_raw[i], g_len[i]) == 0);
+		git_blob_free(blob);
+	}
+}
+
+void test_object_blob_filter__stats(void)
+{
+	int i;
+	git_blob *blob;
+	git_buf buf = GIT_BUF_INIT;
+	git_text_stats stats;
+
+	for (i = 0; i < NUM_TEST_OBJECTS; i++) {
+		cl_git_pass(git_blob_lookup(&blob, g_repo, &g_oids[i]));
+		cl_git_pass(git_blob__getbuf(&buf, blob));
+		git_text_gather_stats(&stats, &buf);
+		cl_assert(memcmp(&g_stats[i], &stats, sizeof(stats)) == 0);
+		git_blob_free(blob);
+	}
+
+	git_buf_free(&buf);
+}
+
+void test_object_blob_filter__to_odb(void)
+{
+	git_vector filters = GIT_VECTOR_INIT;
+	git_config *cfg;
+	int i;
+	git_blob *blob;
+	git_buf orig = GIT_BUF_INIT, out = GIT_BUF_INIT;
+
+	cl_git_pass(git_repository_config(&cfg, g_repo));
+	cl_assert(cfg);
+
+	git_attr_cache_flush(g_repo);
+	cl_git_append2file("empty_standard_repo/.gitattributes", "*.txt text\n");
+
+	cl_assert(git_filters_load(
+		&filters, g_repo, "filename.txt", GIT_FILTER_TO_ODB) > 0);
+	cl_assert(filters.length == 1);
+
+	for (i = 0; i < NUM_TEST_OBJECTS; i++) {
+		cl_git_pass(git_blob_lookup(&blob, g_repo, &g_oids[i]));
+		cl_git_pass(git_blob__getbuf(&orig, blob));
+
+		cl_git_pass(git_filters_apply(&out, &orig, &filters));
+		cl_assert(git_buf_cmp(&out, &g_crlf_filtered[i]) == 0);
+
+		git_blob_free(blob);
+	}
+
+	git_filters_free(&filters);
+	git_buf_free(&orig);
+	git_buf_free(&out);
+	git_config_free(cfg);
+}
+