intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 69 insertions, 0 deletions

diff --git a/util/draft/memory_ut.cpp b/util/draft/memory_ut.cpp
new file mode 100644
index 0000000000..76bee30549
--- /dev/null
+++ b/util/draft/memory_ut.cpp
@@ -0,0 +1,69 @@
+#include "memory.h"
+
+#include <library/cpp/testing/unittest/registar.h>
+
+#pragma pack(1)
+struct Y_PACKED TSampleStruct1 {
+    ui8 A;
+    ui8 B;
+};
+
+#pragma pack(1)
+struct Y_PACKED TSampleStruct2 {
+    ui8 A;
+    ui16 B;
+    i32 C;
+};
+
+#pragma pack(1)
+struct Y_PACKED TSampleStruct3 {
+    TSampleStruct2 A;
+    ui64 B;
+};
+
+#pragma pack()
+
+Y_UNIT_TEST_SUITE(TUtilDraftMemoryTest) {
+    Y_UNIT_TEST(IsZeroTest) {
+        ui8 a1 = 0;
+        UNIT_ASSERT(IsZero(a1));
+        a1 = 0xF0;
+        UNIT_ASSERT(!IsZero(a1));
+
+        i32 a2 = -1;
+        UNIT_ASSERT(!IsZero(a2));
+        a2 = 0;
+        UNIT_ASSERT(IsZero(a2));
+
+        double a3 = 0.0;
+        UNIT_ASSERT(IsZero(a3));
+        a3 = 1.e-13;
+        UNIT_ASSERT(!IsZero(a3));
+
+        TSampleStruct1 ss1;
+        ss1.A = 0;
+        ss1.B = 0;
+        UNIT_ASSERT(IsZero(ss1));
+        ss1.A = 0;
+        ss1.B = 12;
+        UNIT_ASSERT(!IsZero(ss1));
+
+        TSampleStruct2 ss2;
+        ss2.A = 0;
+        ss2.B = 100;
+        ss2.C = 0;
+        UNIT_ASSERT(!IsZero(ss2));
+        ss2.B = 0;
+        UNIT_ASSERT(IsZero(ss2));
+
+        TSampleStruct3 ss3;
+        ss3.A = ss2;
+        ss3.B = 0;
+        UNIT_ASSERT(IsZero(ss3));
+        ss3.B = 0x030;
+        UNIT_ASSERT(!IsZero(ss3));
+        ss3.B = 0;
+        ss3.A.C = -789;
+        UNIT_ASSERT(!IsZero(ss3));
+    }
+}