intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 38 insertions, 0 deletions

diff --git a/util/digest/multi_ut.cpp b/util/digest/multi_ut.cpp
new file mode 100644
index 00000000000..dff64ff0cc1
--- /dev/null
+++ b/util/digest/multi_ut.cpp
@@ -0,0 +1,38 @@
+#include "multi.h"
+
+#include <library/cpp/testing/unittest/registar.h>
+
+#include <util/stream/output.h>
+
+class TMultiHashTest: public TTestBase {
+    UNIT_TEST_SUITE(TMultiHashTest);
+    UNIT_TEST(TestStrInt)
+    UNIT_TEST(TestIntStr)
+    UNIT_TEST(TestSimpleCollision)
+    UNIT_TEST(TestTypes)
+    UNIT_TEST_SUITE_END();
+
+private:
+    inline void TestStrInt() {
+        UNIT_ASSERT_EQUAL(MultiHash(TString("1234567"), static_cast<int>(123)), static_cast<size_t>(ULL(17038203285960021630)));
+    }
+
+    inline void TestIntStr() {
+        UNIT_ASSERT_EQUAL(MultiHash(static_cast<int>(123), TString("1234567")), static_cast<size_t>(ULL(9973288649881090712)));
+    }
+
+    inline void TestSimpleCollision() {
+        UNIT_ASSERT_UNEQUAL(MultiHash(1, 1, 0), MultiHash(2, 2, 0));
+    }
+
+    inline void TestTypes() {
+        UNIT_ASSERT_EQUAL(MultiHash("aaa", (ui64)123), MultiHash("aaa", 123));
+        UNIT_ASSERT_EQUAL(MultiHash("aaa", (i64)123), MultiHash("aaa", 123));
+        UNIT_ASSERT_EQUAL(MultiHash("aaa", (i32)123), MultiHash("aaa", 123));
+        UNIT_ASSERT_EQUAL(MultiHash("aaa", (ui32)123), MultiHash("aaa", 123));
+        UNIT_ASSERT_EQUAL(MultiHash("aaa", (i64)-123), MultiHash("aaa", -123));
+        UNIT_ASSERT_EQUAL(MultiHash("aaa", (i32)-123), MultiHash("aaa", -123));
+    }
+};
+
+UNIT_TEST_SUITE_REGISTRATION(TMultiHashTest);