util/system/nice_ut.cpp


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#include "nice.h" 
 
#include "platform.h" 
 
#include <library/cpp/testing/unittest/registar.h>
 
#ifdef _unix_ 
    #include <sys/resource.h>
 
static int GetPriority() { 
    return getpriority(PRIO_PROCESS, 0); 
} 
#endif 
 
Y_UNIT_TEST_SUITE(NiceTest) {
    Y_UNIT_TEST(TestNiceZero) {
        UNIT_ASSERT(Nice(0)); 
        UNIT_ASSERT(Nice(0)); 
    } 
#ifdef _unix_ 
    Y_UNIT_TEST(TestNice) {
        int prio = GetPriority(); 

        if (prio >= 10) {
            return;
        }

        if (Nice(-2)) { 
            UNIT_ASSERT_VALUES_EQUAL(GetPriority(), prio - 2); 
            prio -= 2; 
        } else { 
            UNIT_ASSERT_VALUES_EQUAL(GetPriority(), prio); 
        } 
        UNIT_ASSERT(Nice(1));
        UNIT_ASSERT_VALUES_EQUAL(GetPriority(), prio + 1);
        UNIT_ASSERT(Nice(0)); 
        UNIT_ASSERT_VALUES_EQUAL(GetPriority(), prio + 1);
        UNIT_ASSERT(Nice(2));
        UNIT_ASSERT_VALUES_EQUAL(GetPriority(), prio + 3);
    } 
#endif 
}