intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 40 insertions, 0 deletions

diff --git a/library/cpp/digest/sfh/sfh_ut.cpp b/library/cpp/digest/sfh/sfh_ut.cpp
new file mode 100644
index 00000000000..912999bae75
--- /dev/null
+++ b/library/cpp/digest/sfh/sfh_ut.cpp
@@ -0,0 +1,40 @@
+#include "sfh.h"
+
+#include <library/cpp/testing/unittest/registar.h>
+
+#include <util/stream/output.h>
+
+class TSfhTest: public TTestBase {
+    UNIT_TEST_SUITE(TSfhTest);
+    UNIT_TEST(TestSfh)
+    UNIT_TEST_SUITE_END();
+
+private:
+    inline void TestSfh() {
+        ui8 buf[256];
+
+        for (size_t i = 0; i < 256; ++i) {
+            buf[i] = i;
+        }
+
+        Test(buf, 256, 3840866583UL);
+        Test(buf, 255, 325350515UL);
+        Test(buf, 254, 2920741773UL);
+        Test(buf, 253, 3586628615UL);
+    }
+
+private:
+    inline void Test(const void* data, size_t len, ui32 expected) {
+        const ui32 res = SuperFastHash(data, len);
+
+        try {
+            UNIT_ASSERT_EQUAL(res, expected);
+        } catch (...) {
+            Cerr << res << ", " << expected << Endl;
+
+            throw;
+        }
+    }
+};
+
+UNIT_TEST_SUITE_REGISTRATION(TSfhTest);