util/draft/memory_ut.cpp


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#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)); 
    } 
}