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39 lines
1.0 KiB
C++
39 lines
1.0 KiB
C++
/*
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* Copyright (c) 2022, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibTest/TestCase.h>
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#include <AK/IntegralMath.h>
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#include <initializer_list>
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TEST_CASE(pow)
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{
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EXPECT_EQ(AK::pow<u64>(10, 0), 1ull);
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EXPECT_EQ(AK::pow<u64>(10, 1), 10ull);
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EXPECT_EQ(AK::pow<u64>(10, 2), 100ull);
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EXPECT_EQ(AK::pow<u64>(10, 3), 1'000ull);
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EXPECT_EQ(AK::pow<u64>(10, 4), 10'000ull);
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EXPECT_EQ(AK::pow<u64>(10, 5), 100'000ull);
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EXPECT_EQ(AK::pow<u64>(10, 6), 1'000'000ull);
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}
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TEST_CASE(is_power_of)
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{
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constexpr auto check_prime = []<u64 prime>(u64 limit) {
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for (u64 power = 0; power < limit; ++power)
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EXPECT(AK::is_power_of<prime>(AK::pow(prime, power)));
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};
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// Limits calculated as floor( log_{prime}(2^64) ) to prevent overflows.
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check_prime.operator()<2>(64);
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check_prime.operator()<3>(40);
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check_prime.operator()<5>(27);
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check_prime.operator()<7>(20);
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check_prime.operator()<11>(18);
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check_prime.operator()<97>(9);
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check_prime.operator()<257>(7);
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}
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