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Bug 1175485 part 4 - Add unit test for integer range. r=waldo
--HG-- extra : source : 2fb0dd6ca01c21b9282e0d7637ac09c2e8539a02
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | ||
/* vim: set ts=8 sts=2 et sw=2 tw=80: */ | ||
/* This Source Code Form is subject to the terms of the Mozilla Public | ||
* License, v. 2.0. If a copy of the MPL was not distributed with this | ||
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | ||
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#include "mozilla/Assertions.h" | ||
#include "mozilla/IntegerRange.h" | ||
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#include <stddef.h> | ||
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using mozilla::IsSame; | ||
using mozilla::MakeRange; | ||
using mozilla::Reversed; | ||
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const size_t kMaxNumber = 50; | ||
const size_t kArraySize = 256; | ||
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template<typename IntType> | ||
static IntType | ||
GenerateNumber() | ||
{ | ||
return static_cast<IntType>(rand() % kMaxNumber + 1); | ||
} | ||
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template<typename IntType> | ||
static void | ||
TestSingleParamRange(const IntType aN) | ||
{ | ||
IntType array[kArraySize]; | ||
IntType* ptr = array; | ||
for (auto i : MakeRange(aN)) { | ||
static_assert(IsSame<decltype(i), IntType>::value, | ||
"type of the loop var and the param should be the same"); | ||
*ptr++ = i; | ||
} | ||
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MOZ_RELEASE_ASSERT(ptr - array == static_cast<ptrdiff_t>(aN), | ||
"Should iterates N items"); | ||
for (size_t i = 0; i < static_cast<size_t>(aN); i++) { | ||
MOZ_RELEASE_ASSERT(array[i] == static_cast<IntType>(i), | ||
"Values should equal to the index"); | ||
} | ||
} | ||
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template<typename IntType> | ||
static void | ||
TestSingleParamReverseRange(const IntType aN) | ||
{ | ||
IntType array[kArraySize]; | ||
IntType* ptr = array; | ||
for (auto i : Reversed(MakeRange(aN))) { | ||
static_assert(IsSame<decltype(i), IntType>::value, | ||
"type of the loop var and the param should be the same"); | ||
*ptr++ = i; | ||
} | ||
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MOZ_RELEASE_ASSERT(ptr - array == static_cast<ptrdiff_t>(aN), | ||
"Should iterates N items"); | ||
for (size_t i = 0; i < static_cast<size_t>(aN); i++) { | ||
MOZ_RELEASE_ASSERT(array[i] == static_cast<IntType>(aN - i - 1), | ||
"Values should be the reverse of their index"); | ||
} | ||
} | ||
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template<typename IntType> | ||
static void | ||
TestSingleParamIntegerRange() | ||
{ | ||
const auto kN = GenerateNumber<IntType>(); | ||
TestSingleParamRange<IntType>(0); | ||
TestSingleParamReverseRange<IntType>(0); | ||
TestSingleParamRange<IntType>(kN); | ||
TestSingleParamReverseRange<IntType>(kN); | ||
} | ||
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template<typename IntType1, typename IntType2> | ||
static void | ||
TestDoubleParamRange(const IntType1 aBegin, const IntType2 aEnd) | ||
{ | ||
IntType2 array[kArraySize]; | ||
IntType2* ptr = array; | ||
for (auto i : MakeRange(aBegin, aEnd)) { | ||
static_assert(IsSame<decltype(i), IntType2>::value, "type of the loop var " | ||
"should be same as that of the second param"); | ||
*ptr++ = i; | ||
} | ||
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MOZ_RELEASE_ASSERT(ptr - array == static_cast<ptrdiff_t>(aEnd - aBegin), | ||
"Should iterates (aEnd - aBegin) times"); | ||
for (size_t i = 0; i < static_cast<size_t>(aEnd - aBegin); i++) { | ||
MOZ_RELEASE_ASSERT(array[i] == static_cast<IntType2>(aBegin + i), | ||
"Should iterate integers in [aBegin, aEnd) in order"); | ||
} | ||
} | ||
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template<typename IntType1, typename IntType2> | ||
static void | ||
TestDoubleParamReverseRange(const IntType1 aBegin, const IntType2 aEnd) | ||
{ | ||
IntType2 array[kArraySize]; | ||
IntType2* ptr = array; | ||
for (auto i : Reversed(MakeRange(aBegin, aEnd))) { | ||
static_assert(IsSame<decltype(i), IntType2>::value, "type of the loop var " | ||
"should be same as that of the second param"); | ||
*ptr++ = i; | ||
} | ||
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MOZ_RELEASE_ASSERT(ptr - array == static_cast<ptrdiff_t>(aEnd - aBegin), | ||
"Should iterates (aEnd - aBegin) times"); | ||
for (size_t i = 0; i < static_cast<size_t>(aEnd - aBegin); i++) { | ||
MOZ_RELEASE_ASSERT(array[i] == static_cast<IntType2>(aEnd - i - 1), | ||
"Should iterate integers in [aBegin, aEnd) in reverse order"); | ||
} | ||
} | ||
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template<typename IntType1, typename IntType2> | ||
static void | ||
TestDoubleParamIntegerRange() | ||
{ | ||
const auto kStart = GenerateNumber<IntType1>(); | ||
const auto kEnd = static_cast<IntType2>(kStart + GenerateNumber<IntType2>()); | ||
TestDoubleParamRange(kStart, static_cast<IntType2>(kStart)); | ||
TestDoubleParamReverseRange(kStart, static_cast<IntType2>(kStart)); | ||
TestDoubleParamRange(kStart, kEnd); | ||
TestDoubleParamReverseRange(kStart, kEnd); | ||
} | ||
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int | ||
main() | ||
{ | ||
TestSingleParamIntegerRange<int8_t>(); | ||
TestSingleParamIntegerRange<int16_t>(); | ||
TestSingleParamIntegerRange<int32_t>(); | ||
TestSingleParamIntegerRange<int64_t>(); | ||
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TestSingleParamIntegerRange<uint8_t>(); | ||
TestSingleParamIntegerRange<uint16_t>(); | ||
TestSingleParamIntegerRange<uint32_t>(); | ||
TestSingleParamIntegerRange<uint64_t>(); | ||
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TestDoubleParamIntegerRange<int8_t, int8_t>(); | ||
TestDoubleParamIntegerRange<int16_t, int16_t>(); | ||
TestDoubleParamIntegerRange<int32_t, int32_t>(); | ||
TestDoubleParamIntegerRange<int64_t, int64_t>(); | ||
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TestDoubleParamIntegerRange<uint8_t, uint8_t>(); | ||
TestDoubleParamIntegerRange<uint16_t, uint16_t>(); | ||
TestDoubleParamIntegerRange<uint32_t, uint32_t>(); | ||
TestDoubleParamIntegerRange<uint64_t, uint64_t>(); | ||
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TestDoubleParamIntegerRange<int8_t, int16_t>(); | ||
TestDoubleParamIntegerRange<int16_t, int32_t>(); | ||
TestDoubleParamIntegerRange<int32_t, int64_t>(); | ||
TestDoubleParamIntegerRange<int64_t, int8_t>(); | ||
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TestDoubleParamIntegerRange<uint8_t, uint64_t>(); | ||
TestDoubleParamIntegerRange<uint16_t, uint8_t>(); | ||
TestDoubleParamIntegerRange<uint32_t, uint16_t>(); | ||
TestDoubleParamIntegerRange<uint64_t, uint32_t>(); | ||
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return 0; | ||
} |
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