intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 23 insertions, 0 deletions

diff --git a/library/cpp/digest/crc32c/crc32c_ut.cpp b/library/cpp/digest/crc32c/crc32c_ut.cpp
new file mode 100644
index 0000000000..aa31b83422
--- /dev/null
+++ b/library/cpp/digest/crc32c/crc32c_ut.cpp
@@ -0,0 +1,23 @@
+#include "crc32c.h"
+
+#include <library/cpp/testing/unittest/registar.h>
+
+Y_UNIT_TEST_SUITE(TestCrc32c) {
+    Y_UNIT_TEST(TestCalc) {
+        UNIT_ASSERT_VALUES_EQUAL(Crc32c("abc", 3), ui32(910901175));
+    }
+
+    Y_UNIT_TEST(TestUnaligned) {
+        const TString str(1000, 'a');
+        for (size_t substrLen = 0; substrLen <= str.length(); ++substrLen) {
+            const ui32 crc = Crc32c(str.data(), substrLen);
+            for (size_t offset = 1; offset + substrLen <= str.length(); ++offset) {
+                UNIT_ASSERT_VALUES_EQUAL(Crc32c(str.data() + offset, substrLen), crc);
+            }
+        }
+    }
+
+    Y_UNIT_TEST(TestExtend) {
+        UNIT_ASSERT_VALUES_EQUAL(Crc32cExtend(1, "abc", 3), ui32(2466950601));
+    }
+}