315 lines
8.7 KiB
C++
315 lines
8.7 KiB
C++
/******************************************************************************
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The MIT License(MIT)
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Embedded Template Library.
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https://github.com/ETLCPP/etl
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https://www.etlcpp.com
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Copyright(c) 2014 John Wellbelove
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files(the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions :
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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******************************************************************************/
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#include "unit_test_framework.h"
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#include <type_traits>
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#include <iterator>
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#include <string>
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#include <vector>
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#include <stdint.h>
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#include "etl/hash.h"
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// for testing user-defined hash specializations
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namespace { class CustomType{}; }
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namespace etl
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{
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template <>
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struct hash<CustomType>
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{
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size_t operator()(CustomType) {return 0;}
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};
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}
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namespace
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{
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SUITE(test_hash)
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{
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//*************************************************************************
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TEST(test_hash_bool)
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{
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size_t hash = etl::hash<bool>()(false);
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CHECK_EQUAL(0U, hash);
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hash = etl::hash<bool>()(true);
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CHECK_EQUAL(1U, hash);
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}
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//*************************************************************************
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TEST(test_hash_char)
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{
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size_t hash = etl::hash<char>()(0x5A);
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CHECK_EQUAL(0x5AU, hash);
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}
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//*************************************************************************
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TEST(test_hash_signed_char)
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{
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size_t hash = etl::hash<signed char>()(0x5A);
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CHECK_EQUAL(0x5AU, hash);
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}
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//*************************************************************************
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TEST(test_hash_unsigned_char)
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{
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size_t hash = etl::hash<unsigned char>()(0x5AU);
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CHECK_EQUAL(0x5AU, hash);
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}
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//*************************************************************************
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TEST(test_hash_short)
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{
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size_t hash = etl::hash<short>()(0x5AA5);
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CHECK_EQUAL(0x5AA5U, hash);
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}
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//*************************************************************************
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TEST(test_hash_unsigned_short)
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{
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size_t hash = etl::hash<unsigned short>()(0x5AA5U);
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CHECK_EQUAL(0x5AA5U, hash);
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}
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//*************************************************************************
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TEST(test_hash_int)
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{
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size_t hash = etl::hash<int>()(0x5AA555AA);
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CHECK_EQUAL(0x5AA555AAUL, hash);
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}
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//*************************************************************************
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TEST(test_hash_unsigned_int)
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{
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size_t hash = etl::hash<unsigned int>()(0x5AA555AAU);
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CHECK_EQUAL(0x5AA555AAUL, hash);
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}
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//*************************************************************************
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TEST(test_hash_long)
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{
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size_t hash = etl::hash<long>()(0x5AA555AAL);
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CHECK_EQUAL(0x5AA555AAUL, hash);
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}
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//*************************************************************************
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TEST(test_hash_unsigned_long)
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{
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size_t hash = etl::hash<unsigned long>()(0x5AA555AAUL);
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CHECK_EQUAL(0x5AA555AAUL, hash);
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}
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//*************************************************************************
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TEST(test_hash_long_long)
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{
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size_t hash = etl::hash<long long>()(0x5AA555AA3CC333CCLL);
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if (ETL_PLATFORM_32BIT)
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{
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CHECK_EQUAL(0xEC6A8D69UL, hash);
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}
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if (ETL_PLATFORM_64BIT)
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{
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CHECK_EQUAL(0x5AA555AA3CC333CCULL, hash);
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}
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}
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//*************************************************************************
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TEST(test_hash_unsigned_long_long)
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{
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size_t hash = etl::hash<unsigned long long>()(0x5AA555AA3CC333CCULL);
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if (ETL_PLATFORM_32BIT)
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{
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CHECK_EQUAL(0xEC6A8D69UL, hash);
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}
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if (ETL_PLATFORM_64BIT)
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{
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CHECK_EQUAL(0x5AA555AA3CC333CCULL, hash);
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}
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}
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//*************************************************************************
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TEST(test_hash_float)
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{
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size_t hash = etl::hash<float>()((float)(1.2345));
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if (ETL_PLATFORM_32BIT)
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{
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CHECK_EQUAL(0X3F9E0419U, hash);
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}
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if (ETL_PLATFORM_64BIT)
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{
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CHECK_EQUAL(9821047038287739023U, hash);
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}
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}
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//*************************************************************************
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TEST(test_hash_double)
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{
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size_t hash = etl::hash<double>()(1.2345);
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if (ETL_PLATFORM_32BIT)
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{
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CHECK_EQUAL(0x86FBF224UL, hash);
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}
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if (ETL_PLATFORM_64BIT)
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{
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CHECK_EQUAL(0x3FF3C083126E978DULL, hash);
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}
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}
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TEST(test_hash_floating_point_negative_zero)
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{
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if (sizeof(float) == sizeof(size_t)) {
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etl::hash<float> hasher{};
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size_t hash1 = hasher(0.0);
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size_t hash2 = hasher(-0.0);
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CHECK_EQUAL(hash1, hash2);
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}
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if (sizeof(double) == sizeof(size_t)) {
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etl::hash<double> hasher{};
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size_t hash1 = hasher(0.0);
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size_t hash2 = hasher(-0.0);
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CHECK_EQUAL(hash1, hash2);
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}
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if (sizeof(long double) == sizeof(size_t)) {
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etl::hash<long double> hasher{};
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size_t hash1 = hasher(0.0);
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size_t hash2 = hasher(-0.0);
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CHECK_EQUAL(hash1, hash2);
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}
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}
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//*************************************************************************
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TEST(test_hash_pointer)
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{
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int i{};
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size_t hash = etl::hash<int*>()(&i);
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CHECK_EQUAL(size_t(&i), hash);
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}
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//*************************************************************************
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TEST(test_hash_const_pointer)
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{
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int i{};
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size_t hash = etl::hash<const int*>()(&i);
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CHECK_EQUAL(size_t(&i), hash);
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}
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//*************************************************************************
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TEST(test_hash_const_pointer_const)
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{
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int i{};
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const int * const pi = &i;
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size_t hash = etl::hash<const int *>()(pi);
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CHECK_EQUAL(size_t(&i), hash);
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}
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//*************************************************************************
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TEST(test_hash_enums)
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{
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enum class MyEnumClass : char
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{
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OneE = 0x1E
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};
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enum MyEnum : char
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{
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MyEnum_TwoF = 0x2F
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};
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size_t hash = etl::hash<MyEnumClass>()(MyEnumClass::OneE);
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CHECK_EQUAL(static_cast<size_t>(MyEnumClass::OneE), hash);
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hash = etl::hash<MyEnum>()(MyEnum_TwoF);
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CHECK_EQUAL(0x2F, hash);
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}
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//*************************************************************************
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TEST(test_hash_big_enums)
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{
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constexpr unsigned long long big_number = 0x5AA555AA3CC333CCULL;
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enum class MyBigEnumClass : unsigned long long
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{
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Big = big_number
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};
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size_t hash = etl::hash<MyBigEnumClass>()(MyBigEnumClass::Big);
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size_t expectedHash = etl::hash<unsigned long long>()(big_number);
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CHECK_EQUAL(expectedHash, hash);
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}
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//*************************************************************************
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TEST(test_hash_poisoned)
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{
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// Unspecialized hash<> should be disabled (unusable) - see https://en.cppreference.com/w/cpp/utility/hash
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class A {};
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typedef etl::hash<A> general_hasher;
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CHECK_FALSE(std::is_default_constructible<general_hasher>::value);
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CHECK_FALSE(std::is_copy_constructible<general_hasher>::value);
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CHECK_FALSE(std::is_move_constructible<general_hasher>::value);
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CHECK_FALSE(std::is_copy_assignable<general_hasher>::value);
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CHECK_FALSE(std::is_move_assignable<general_hasher>::value);
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}
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//*************************************************************************
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TEST(test_hash_custom)
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{
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typedef etl::hash<CustomType> custom_hasher;
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CHECK_TRUE(std::is_default_constructible<custom_hasher>::value);
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CHECK_TRUE(std::is_copy_constructible<custom_hasher>::value);
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CHECK_TRUE(std::is_move_constructible<custom_hasher>::value);
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CHECK_TRUE(std::is_copy_assignable<custom_hasher>::value);
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CHECK_TRUE(std::is_move_assignable<custom_hasher>::value);
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}
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};
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}
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