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309 lines
9.2 KiB
C++
309 lines
9.2 KiB
C++
/*
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* Copyright (c) 2020, Ben Wiederhake <BenWiederhake.GitHub@gmx.de>
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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/DistinctNumeric.h>
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template<typename T>
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class ForType {
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public:
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static void check_size()
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{
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AK_TYPEDEF_DISTINCT_NUMERIC_GENERAL(T, TheNumeric);
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EXPECT_EQ(sizeof(T), sizeof(TheNumeric));
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}
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};
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TEST_CASE(check_size)
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{
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#define CHECK_SIZE_FOR_SIGNABLE(T) \
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do { \
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ForType<signed T>::check_size(); \
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ForType<unsigned T>::check_size(); \
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} while (false)
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CHECK_SIZE_FOR_SIGNABLE(char);
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CHECK_SIZE_FOR_SIGNABLE(short);
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CHECK_SIZE_FOR_SIGNABLE(int);
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CHECK_SIZE_FOR_SIGNABLE(long);
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CHECK_SIZE_FOR_SIGNABLE(long long);
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ForType<float>::check_size();
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ForType<double>::check_size();
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}
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AK_TYPEDEF_DISTINCT_NUMERIC_GENERAL(int, BareNumeric);
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AK_TYPEDEF_DISTINCT_NUMERIC_GENERAL(int, IncrNumeric, Increment);
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AK_TYPEDEF_DISTINCT_NUMERIC_GENERAL(int, CmpNumeric, Comparison);
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AK_TYPEDEF_DISTINCT_NUMERIC_GENERAL(int, BoolNumeric, CastToBool);
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AK_TYPEDEF_DISTINCT_NUMERIC_GENERAL(int, FlagsNumeric, Flags);
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AK_TYPEDEF_DISTINCT_NUMERIC_GENERAL(int, ShiftNumeric, Shift);
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AK_TYPEDEF_DISTINCT_NUMERIC_GENERAL(int, ArithNumeric, Arithmetic);
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AK_TYPEDEF_DISTINCT_NUMERIC_GENERAL(int, UnderlyingNumeric, CastToUnderlying);
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AK_TYPEDEF_DISTINCT_NUMERIC_GENERAL(int, GeneralNumeric, Arithmetic, CastToBool, CastToUnderlying, Comparison, Flags, Increment, Shift);
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TEST_CASE(address_identity)
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{
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BareNumeric a = 4;
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BareNumeric b = 5;
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EXPECT_EQ(&a == &a, true);
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EXPECT_EQ(&a == &b, false);
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EXPECT_EQ(&a != &a, false);
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EXPECT_EQ(&a != &b, true);
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}
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TEST_CASE(operator_identity)
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{
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BareNumeric a = 4;
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BareNumeric b = 5;
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EXPECT_EQ(a == a, true);
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EXPECT_EQ(a == b, false);
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EXPECT_EQ(a != a, false);
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EXPECT_EQ(a != b, true);
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}
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TEST_CASE(operator_incr)
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{
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IncrNumeric a = 4;
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IncrNumeric b = 5;
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IncrNumeric c = 6;
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EXPECT_EQ(++a, b);
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EXPECT_EQ(a++, b);
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EXPECT_EQ(a, c);
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EXPECT_EQ(--a, b);
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EXPECT_EQ(a--, b);
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EXPECT(a != b);
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}
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TEST_CASE(operator_cmp)
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{
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CmpNumeric a = 4;
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CmpNumeric b = 5;
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CmpNumeric c = 5;
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EXPECT_EQ(a > b, false);
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EXPECT_EQ(a < b, true);
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EXPECT_EQ(a >= b, false);
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EXPECT_EQ(a <= b, true);
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EXPECT_EQ(b > a, true);
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EXPECT_EQ(b < a, false);
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EXPECT_EQ(b >= a, true);
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EXPECT_EQ(b <= a, false);
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EXPECT_EQ(b > c, false);
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EXPECT_EQ(b < c, false);
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EXPECT_EQ(b >= c, true);
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EXPECT_EQ(b <= c, true);
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}
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TEST_CASE(operator_bool)
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{
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BoolNumeric a = 0;
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BoolNumeric b = 42;
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BoolNumeric c = 1337;
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EXPECT_EQ(!a, true);
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EXPECT_EQ(!b, false);
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EXPECT_EQ(!c, false);
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}
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TEST_CASE(operator_underlying)
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{
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UnderlyingNumeric a = 0;
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UnderlyingNumeric b = 42;
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EXPECT_EQ(static_cast<int>(a), 0);
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EXPECT_EQ(static_cast<int>(b), 42);
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}
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TEST_CASE(operator_flags)
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{
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FlagsNumeric a = 0;
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FlagsNumeric b = 0xA60;
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FlagsNumeric c = 0x03B;
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EXPECT_EQ(~a, FlagsNumeric(~0x0));
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EXPECT_EQ(~b, FlagsNumeric(~0xA60));
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EXPECT_EQ(~c, FlagsNumeric(~0x03B));
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EXPECT_EQ(a & b, b & a);
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EXPECT_EQ(a & c, c & a);
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EXPECT_EQ(b & c, c & b);
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EXPECT_EQ(a | b, b | a);
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EXPECT_EQ(a | c, c | a);
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EXPECT_EQ(b | c, c | b);
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EXPECT_EQ(a ^ b, b ^ a);
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EXPECT_EQ(a ^ c, c ^ a);
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EXPECT_EQ(b ^ c, c ^ b);
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EXPECT_EQ(a & b, FlagsNumeric(0x000));
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EXPECT_EQ(a & c, FlagsNumeric(0x000));
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EXPECT_EQ(b & c, FlagsNumeric(0x020));
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EXPECT_EQ(a | b, FlagsNumeric(0xA60));
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EXPECT_EQ(a | c, FlagsNumeric(0x03B));
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EXPECT_EQ(b | c, FlagsNumeric(0xA7B));
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EXPECT_EQ(a ^ b, FlagsNumeric(0xA60));
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EXPECT_EQ(a ^ c, FlagsNumeric(0x03B));
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EXPECT_EQ(b ^ c, FlagsNumeric(0xA5B));
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EXPECT_EQ(a &= b, FlagsNumeric(0x000));
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EXPECT_EQ(a, FlagsNumeric(0x000));
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EXPECT_EQ(a |= b, FlagsNumeric(0xA60));
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EXPECT_EQ(a, FlagsNumeric(0xA60));
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EXPECT_EQ(a &= c, FlagsNumeric(0x020));
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EXPECT_EQ(a, FlagsNumeric(0x020));
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EXPECT_EQ(a ^= b, FlagsNumeric(0xA40));
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EXPECT_EQ(a, FlagsNumeric(0xA40));
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EXPECT_EQ(b, FlagsNumeric(0xA60));
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EXPECT_EQ(c, FlagsNumeric(0x03B));
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}
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TEST_CASE(operator_shift)
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{
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ShiftNumeric a = 0x040;
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EXPECT_EQ(a << ShiftNumeric(0), ShiftNumeric(0x040));
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EXPECT_EQ(a << ShiftNumeric(1), ShiftNumeric(0x080));
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EXPECT_EQ(a << ShiftNumeric(2), ShiftNumeric(0x100));
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EXPECT_EQ(a >> ShiftNumeric(0), ShiftNumeric(0x040));
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EXPECT_EQ(a >> ShiftNumeric(1), ShiftNumeric(0x020));
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EXPECT_EQ(a >> ShiftNumeric(2), ShiftNumeric(0x010));
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EXPECT_EQ(a <<= ShiftNumeric(5), ShiftNumeric(0x800));
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EXPECT_EQ(a, ShiftNumeric(0x800));
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EXPECT_EQ(a >>= ShiftNumeric(8), ShiftNumeric(0x008));
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EXPECT_EQ(a, ShiftNumeric(0x008));
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}
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TEST_CASE(operator_arith)
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{
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ArithNumeric a = 12;
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ArithNumeric b = 345;
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EXPECT_EQ(a + b, ArithNumeric(357));
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EXPECT_EQ(b + a, ArithNumeric(357));
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EXPECT_EQ(a - b, ArithNumeric(-333));
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EXPECT_EQ(b - a, ArithNumeric(333));
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EXPECT_EQ(+a, ArithNumeric(12));
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EXPECT_EQ(-a, ArithNumeric(-12));
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EXPECT_EQ(a * b, ArithNumeric(4140));
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EXPECT_EQ(b * a, ArithNumeric(4140));
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EXPECT_EQ(a / b, ArithNumeric(0));
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EXPECT_EQ(b / a, ArithNumeric(28));
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EXPECT_EQ(a % b, ArithNumeric(12));
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EXPECT_EQ(b % a, ArithNumeric(9));
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EXPECT_EQ(a += a, ArithNumeric(24));
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EXPECT_EQ(a, ArithNumeric(24));
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EXPECT_EQ(a *= a, ArithNumeric(576));
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EXPECT_EQ(a, ArithNumeric(576));
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EXPECT_EQ(a /= a, ArithNumeric(1));
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EXPECT_EQ(a, ArithNumeric(1));
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EXPECT_EQ(a %= a, ArithNumeric(0));
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EXPECT_EQ(a, ArithNumeric(0));
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a = ArithNumeric(12);
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EXPECT_EQ(a -= a, ArithNumeric(0));
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EXPECT_EQ(a, ArithNumeric(0));
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}
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TEST_CASE(composability)
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{
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GeneralNumeric a = 0;
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GeneralNumeric b = 1;
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// Ident
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EXPECT_EQ(a == a, true);
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EXPECT_EQ(a == b, false);
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// Incr
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EXPECT_EQ(++a, b);
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EXPECT_EQ(a--, b);
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EXPECT_EQ(a == b, false);
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// Cmp
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EXPECT_EQ(a < b, true);
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EXPECT_EQ(a >= b, false);
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// Bool
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EXPECT_EQ(!a, true);
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// Flags
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EXPECT_EQ(a & b, GeneralNumeric(0));
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EXPECT_EQ(a | b, GeneralNumeric(1));
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// Shift
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EXPECT_EQ(b << GeneralNumeric(4), GeneralNumeric(0x10));
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EXPECT_EQ(b >> b, GeneralNumeric(0));
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// Arith
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EXPECT_EQ(-b, GeneralNumeric(-1));
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EXPECT_EQ(a + b, b);
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EXPECT_EQ(b * GeneralNumeric(42), GeneralNumeric(42));
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// Underlying
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EXPECT_EQ(static_cast<int>(a), 0);
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EXPECT_EQ(static_cast<int>(b), 1);
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}
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/*
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* FIXME: These `negative_*` tests should cause precisely one compilation error
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* each, and always for the specified reason. Currently we do not have a harness
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* for that, so in order to run the test you need to set the #define to 1, compile
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* it, and check the error messages manually.
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*/
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#define COMPILE_NEGATIVE_TESTS 0
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#if COMPILE_NEGATIVE_TESTS
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TEST_CASE(negative_incr)
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{
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BareNumeric a = 12;
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a++;
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// error: static assertion failed: 'a++' is only available for DistinctNumeric types with 'Increment'.
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}
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TEST_CASE(negative_cmp)
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{
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BareNumeric a = 12;
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[[maybe_unused]] auto res = (a < a);
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// error: static assertion failed: 'a<b' is only available for DistinctNumeric types with 'Comparison'.
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}
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TEST_CASE(negative_bool)
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{
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BareNumeric a = 12;
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[[maybe_unused]] auto res = !a;
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// error: static assertion failed: '!a', 'a&&b', 'a||b' and similar operators are only available for DistinctNumeric types with 'CastToBool'.
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}
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TEST_CASE(negative_flags)
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{
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BareNumeric a = 12;
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[[maybe_unused]] auto res = (a & a);
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// error: static assertion failed: 'a&b' is only available for DistinctNumeric types with 'Flags'.
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}
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TEST_CASE(negative_shift)
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{
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BareNumeric a = 12;
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[[maybe_unused]] auto res = (a << a);
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// error: static assertion failed: 'a<<b' is only available for DistinctNumeric types with 'Shift'.
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}
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TEST_CASE(negative_arith)
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{
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BareNumeric a = 12;
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[[maybe_unused]] auto res = (a + a);
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// error: static assertion failed: 'a+b' is only available for DistinctNumeric types with 'Arithmetic'.
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}
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TEST_CASE(negative_underlying)
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{
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BareNumeric a = 12;
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[[maybe_unused]] int res = static_cast<int>(a);
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// error: static assertion failed: Cast to underlying type is only available for DistinctNumeric types with 'CastToUnderlying'.
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}
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TEST_CASE(negative_incompatible)
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{
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GeneralNumeric a = 12;
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ArithNumeric b = 345;
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// And this is the entire point of `DistinctNumeric`:
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// Theoretically, the operation *could* be supported, but we declared those int types incompatible.
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[[maybe_unused]] auto res = (a + b);
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// error: no match for ‘operator+’ (operand types are ‘GeneralNumeric’ {aka ‘AK::DistinctNumeric<int, true, true, true, true, true, true, 64, 64>’} and ‘ArithNumeric’ {aka ‘AK::DistinctNumeric<int, false, false, false, false, false, true, 64, 63>’})
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// 313 | [[maybe_unused]] auto res = (a + b);
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// | ~ ^ ~
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// | | |
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// | | DistinctNumeric<[...],false,false,false,false,false,[...],[...],63>
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// | DistinctNumeric<[...],true,true,true,true,true,[...],[...],64>
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}
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#endif /* COMPILE_NEGATIVE_TESTS */
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