ladybird/Tests/AK/TestDistinctNumeric.cpp

286 lines
8.7 KiB
C++
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/*
* Copyright (c) 2020, Ben Wiederhake <BenWiederhake.GitHub@gmx.de>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibTest/TestCase.h>
#include <AK/DistinctNumeric.h>
template<typename T>
class ForType {
public:
static void check_size()
{
AK_TYPEDEF_DISTINCT_NUMERIC_GENERAL(T, false, false, false, false, false, false, TheNumeric);
EXPECT_EQ(sizeof(T), sizeof(TheNumeric));
}
};
TEST_CASE(check_size)
{
#define CHECK_SIZE_FOR_SIGNABLE(T) \
do { \
ForType<signed T>::check_size(); \
ForType<unsigned T>::check_size(); \
} while (false)
CHECK_SIZE_FOR_SIGNABLE(char);
CHECK_SIZE_FOR_SIGNABLE(short);
CHECK_SIZE_FOR_SIGNABLE(int);
CHECK_SIZE_FOR_SIGNABLE(long);
CHECK_SIZE_FOR_SIGNABLE(long long);
ForType<float>::check_size();
ForType<double>::check_size();
}
AK_TYPEDEF_DISTINCT_NUMERIC_GENERAL(int, false, false, false, false, false, false, BareNumeric);
AK_TYPEDEF_DISTINCT_NUMERIC_GENERAL(int, true, false, false, false, false, false, IncrNumeric);
AK_TYPEDEF_DISTINCT_NUMERIC_GENERAL(int, false, true, false, false, false, false, CmpNumeric);
AK_TYPEDEF_DISTINCT_NUMERIC_GENERAL(int, false, false, true, false, false, false, BoolNumeric);
AK_TYPEDEF_DISTINCT_NUMERIC_GENERAL(int, false, false, false, true, false, false, FlagsNumeric);
AK_TYPEDEF_DISTINCT_NUMERIC_GENERAL(int, false, false, false, false, true, false, ShiftNumeric);
AK_TYPEDEF_DISTINCT_NUMERIC_GENERAL(int, false, false, false, false, false, true, ArithNumeric);
AK_TYPEDEF_DISTINCT_NUMERIC_GENERAL(int, true, true, true, true, true, true, GeneralNumeric);
TEST_CASE(address_identity)
{
BareNumeric a = 4;
BareNumeric b = 5;
EXPECT_EQ(&a == &a, true);
EXPECT_EQ(&a == &b, false);
EXPECT_EQ(&a != &a, false);
EXPECT_EQ(&a != &b, true);
}
TEST_CASE(operator_identity)
{
BareNumeric a = 4;
BareNumeric b = 5;
EXPECT_EQ(a == a, true);
EXPECT_EQ(a == b, false);
EXPECT_EQ(a != a, false);
EXPECT_EQ(a != b, true);
}
TEST_CASE(operator_incr)
{
IncrNumeric a = 4;
IncrNumeric b = 5;
IncrNumeric c = 6;
EXPECT_EQ(++a, b);
EXPECT_EQ(a++, b);
EXPECT_EQ(a, c);
EXPECT_EQ(--a, b);
EXPECT_EQ(a--, b);
EXPECT(a != b);
}
TEST_CASE(operator_cmp)
{
CmpNumeric a = 4;
CmpNumeric b = 5;
CmpNumeric c = 5;
EXPECT_EQ(a > b, false);
EXPECT_EQ(a < b, true);
EXPECT_EQ(a >= b, false);
EXPECT_EQ(a <= b, true);
EXPECT_EQ(b > a, true);
EXPECT_EQ(b < a, false);
EXPECT_EQ(b >= a, true);
EXPECT_EQ(b <= a, false);
EXPECT_EQ(b > c, false);
EXPECT_EQ(b < c, false);
EXPECT_EQ(b >= c, true);
EXPECT_EQ(b <= c, true);
}
TEST_CASE(operator_bool)
{
BoolNumeric a = 0;
BoolNumeric b = 42;
BoolNumeric c = 1337;
EXPECT_EQ(!a, true);
EXPECT_EQ(!b, false);
EXPECT_EQ(!c, false);
}
TEST_CASE(operator_flags)
{
FlagsNumeric a = 0;
FlagsNumeric b = 0xA60;
FlagsNumeric c = 0x03B;
EXPECT_EQ(~a, FlagsNumeric(~0x0));
EXPECT_EQ(~b, FlagsNumeric(~0xA60));
EXPECT_EQ(~c, FlagsNumeric(~0x03B));
EXPECT_EQ(a & b, b & a);
EXPECT_EQ(a & c, c & a);
EXPECT_EQ(b & c, c & b);
EXPECT_EQ(a | b, b | a);
EXPECT_EQ(a | c, c | a);
EXPECT_EQ(b | c, c | b);
EXPECT_EQ(a ^ b, b ^ a);
EXPECT_EQ(a ^ c, c ^ a);
EXPECT_EQ(b ^ c, c ^ b);
EXPECT_EQ(a & b, FlagsNumeric(0x000));
EXPECT_EQ(a & c, FlagsNumeric(0x000));
EXPECT_EQ(b & c, FlagsNumeric(0x020));
EXPECT_EQ(a | b, FlagsNumeric(0xA60));
EXPECT_EQ(a | c, FlagsNumeric(0x03B));
EXPECT_EQ(b | c, FlagsNumeric(0xA7B));
EXPECT_EQ(a ^ b, FlagsNumeric(0xA60));
EXPECT_EQ(a ^ c, FlagsNumeric(0x03B));
EXPECT_EQ(b ^ c, FlagsNumeric(0xA5B));
EXPECT_EQ(a &= b, FlagsNumeric(0x000));
EXPECT_EQ(a, FlagsNumeric(0x000));
EXPECT_EQ(a |= b, FlagsNumeric(0xA60));
EXPECT_EQ(a, FlagsNumeric(0xA60));
EXPECT_EQ(a &= c, FlagsNumeric(0x020));
EXPECT_EQ(a, FlagsNumeric(0x020));
EXPECT_EQ(a ^= b, FlagsNumeric(0xA40));
EXPECT_EQ(a, FlagsNumeric(0xA40));
EXPECT_EQ(b, FlagsNumeric(0xA60));
EXPECT_EQ(c, FlagsNumeric(0x03B));
}
TEST_CASE(operator_shift)
{
ShiftNumeric a = 0x040;
EXPECT_EQ(a << ShiftNumeric(0), ShiftNumeric(0x040));
EXPECT_EQ(a << ShiftNumeric(1), ShiftNumeric(0x080));
EXPECT_EQ(a << ShiftNumeric(2), ShiftNumeric(0x100));
EXPECT_EQ(a >> ShiftNumeric(0), ShiftNumeric(0x040));
EXPECT_EQ(a >> ShiftNumeric(1), ShiftNumeric(0x020));
EXPECT_EQ(a >> ShiftNumeric(2), ShiftNumeric(0x010));
EXPECT_EQ(a <<= ShiftNumeric(5), ShiftNumeric(0x800));
EXPECT_EQ(a, ShiftNumeric(0x800));
EXPECT_EQ(a >>= ShiftNumeric(8), ShiftNumeric(0x008));
EXPECT_EQ(a, ShiftNumeric(0x008));
}
TEST_CASE(operator_arith)
{
ArithNumeric a = 12;
ArithNumeric b = 345;
EXPECT_EQ(a + b, ArithNumeric(357));
EXPECT_EQ(b + a, ArithNumeric(357));
EXPECT_EQ(a - b, ArithNumeric(-333));
EXPECT_EQ(b - a, ArithNumeric(333));
EXPECT_EQ(+a, ArithNumeric(12));
EXPECT_EQ(-a, ArithNumeric(-12));
EXPECT_EQ(a * b, ArithNumeric(4140));
EXPECT_EQ(b * a, ArithNumeric(4140));
EXPECT_EQ(a / b, ArithNumeric(0));
EXPECT_EQ(b / a, ArithNumeric(28));
EXPECT_EQ(a % b, ArithNumeric(12));
EXPECT_EQ(b % a, ArithNumeric(9));
EXPECT_EQ(a += a, ArithNumeric(24));
EXPECT_EQ(a, ArithNumeric(24));
EXPECT_EQ(a *= a, ArithNumeric(576));
EXPECT_EQ(a, ArithNumeric(576));
EXPECT_EQ(a /= a, ArithNumeric(1));
EXPECT_EQ(a, ArithNumeric(1));
EXPECT_EQ(a %= a, ArithNumeric(0));
EXPECT_EQ(a, ArithNumeric(0));
}
TEST_CASE(composability)
{
GeneralNumeric a = 0;
GeneralNumeric b = 1;
// Ident
EXPECT_EQ(a == a, true);
EXPECT_EQ(a == b, false);
// Incr
EXPECT_EQ(++a, b);
EXPECT_EQ(a--, b);
EXPECT_EQ(a == b, false);
// Cmp
EXPECT_EQ(a < b, true);
EXPECT_EQ(a >= b, false);
// Bool
EXPECT_EQ(!a, true);
// Flags
EXPECT_EQ(a & b, GeneralNumeric(0));
EXPECT_EQ(a | b, GeneralNumeric(1));
// Shift
EXPECT_EQ(b << GeneralNumeric(4), GeneralNumeric(0x10));
EXPECT_EQ(b >> b, GeneralNumeric(0));
// Arith
EXPECT_EQ(-b, GeneralNumeric(-1));
EXPECT_EQ(a + b, b);
EXPECT_EQ(b * GeneralNumeric(42), GeneralNumeric(42));
}
/*
* FIXME: These `negative_*` tests should cause precisely one compilation error
* each, and always for the specified reason. Currently we do not have a harness
* for that, so in order to run the test you need to set the #define to 1, compile
* it, and check the error messages manually.
*/
#define COMPILE_NEGATIVE_TESTS 0
#if COMPILE_NEGATIVE_TESTS
TEST_CASE(negative_incr)
{
BareNumeric a = 12;
a++;
// error: static assertion failed: 'a++' is only available for DistinctNumeric types with 'Incr'.
}
TEST_CASE(negative_cmp)
{
BareNumeric a = 12;
[[maybe_unused]] auto res = (a < a);
// error: static assertion failed: 'a<b' is only available for DistinctNumeric types with 'Cmp'.
}
TEST_CASE(negative_bool)
{
BareNumeric a = 12;
[[maybe_unused]] auto res = !a;
// error: static assertion failed: '!a', 'a&&b', 'a||b' and similar operators are only available for DistinctNumeric types with 'Bool'.
}
TEST_CASE(negative_flags)
{
BareNumeric a = 12;
[[maybe_unused]] auto res = (a & a);
// error: static assertion failed: 'a&b' is only available for DistinctNumeric types with 'Flags'.
}
TEST_CASE(negative_shift)
{
BareNumeric a = 12;
[[maybe_unused]] auto res = (a << a);
// error: static assertion failed: 'a<<b' is only available for DistinctNumeric types with 'Shift'.
}
TEST_CASE(negative_arith)
{
BareNumeric a = 12;
[[maybe_unused]] auto res = (a + a);
// error: static assertion failed: 'a+b' is only available for DistinctNumeric types with 'Arith'.
}
TEST_CASE(negative_incompatible)
{
GeneralNumeric a = 12;
ArithNumeric b = 345;
// And this is the entire point of `DistinctNumeric`:
// Theoretically, the operation *could* be supported, but we declared those int types incompatible.
[[maybe_unused]] auto res = (a + b);
// 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>})
// 313 | [[maybe_unused]] auto res = (a + b);
// | ~ ^ ~
// | | |
// | | DistinctNumeric<[...],false,false,false,false,false,[...],[...],63>
// | DistinctNumeric<[...],true,true,true,true,true,[...],[...],64>
}
#endif /* COMPILE_NEGATIVE_TESTS */