1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
/*=========================================================================
*
* Copyright NumFOCUS
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
// First include the header file to be tested:
#include "itkSize.h"
#include "itkMath.h"
#include "itkRangeGTestUtilities.h"
#include <gtest/gtest.h>
#include <functional> // For multiplies
#include <limits>
#include <numeric> // For accumulate.
#include <type_traits> // For integral_constant.
namespace
{
template <unsigned int VDimension>
constexpr std::integral_constant<unsigned int, VDimension> DimensionConstant{};
template <unsigned int VDimension>
void
Expect_Filled_returns_Size_with_specified_value_for_each_element()
{
using itk::SizeValueType;
using SizeType = itk::Size<VDimension>;
// Tests that all elements from SizeType::Filled(sizeValue) get the specified value.
const auto Expect_Filled_with_value = [](const SizeValueType sizeValue) {
for (const auto filledSizeValue : SizeType::Filled(sizeValue))
{
EXPECT_EQ(filledSizeValue, sizeValue);
}
};
// Test for sizeValue 0, 1, 2, and its maximum.
for (SizeValueType sizeValue = 0; sizeValue < 3; ++sizeValue)
{
Expect_Filled_with_value(sizeValue);
}
Expect_Filled_with_value(std::numeric_limits<SizeValueType>::max());
}
template <itk::SizeValueType VFillValue>
constexpr bool
Is_Filled_Size_correctly_filled()
{
for (const auto actualValue : itk::Size<>::Filled(VFillValue).m_InternalArray)
{
if (actualValue != VFillValue)
{
return false;
}
}
return true;
}
} // namespace
static_assert(Is_Filled_Size_correctly_filled<0>() && Is_Filled_Size_correctly_filled<1>() &&
Is_Filled_Size_correctly_filled<std::numeric_limits<itk::IndexValueType>::max()>(),
"itk::Size::Filled(value) should be correctly filled at compile-time");
static_assert(itk::RangeGTestUtilities::CheckConstexprBeginAndEndOfContainer<itk::Size<>>() &&
itk::RangeGTestUtilities::CheckConstexprBeginAndEndOfContainer<itk::Size<1>>(),
"Check constexpr begin() and end() of Size.");
// Tests that itk::Size::Filled(value) returns an itk::Size with the
// specified value for each element.
TEST(Size, FilledReturnsSizeWithSpecifiedValueForEachDimension)
{
// Test for 1-D, 2-D, and 3-D.
Expect_Filled_returns_Size_with_specified_value_for_each_element<1>();
Expect_Filled_returns_Size_with_specified_value_for_each_element<2>();
Expect_Filled_returns_Size_with_specified_value_for_each_element<3>();
}
TEST(Size, Make)
{
static_assert((decltype(itk::MakeSize(1, 1))::Dimension == 2) && (decltype(itk::MakeSize(1, 1, 1))::Dimension == 3),
"The dimension of the created itk::Size should equal the number of arguments");
EXPECT_EQ(itk::MakeSize(0, 0), itk::Size<2>());
EXPECT_EQ(itk::MakeSize(0, 0, 0), itk::Size<3>());
const auto itkSize = itk::MakeSize(1, 2, 3, 4);
const auto values = { 1, 2, 3, 4 };
EXPECT_TRUE(std::equal(itkSize.begin(), itkSize.end(), values.begin(), values.end()));
}
// Tests that `Size<dimension>::Fill(sizeValue)` corresponds with `Size<dimension>::Filled(sizeValue)`.
TEST(Size, Fill)
{
const auto check = [](const auto dimensionConstant) {
for (const auto sizeValue : { itk::SizeValueType{ 0 },
itk::SizeValueType{ 1 },
itk::SizeValueType{ 2 },
std::numeric_limits<itk::SizeValueType>::max() })
{
// Added {} initializer to work around warnings from GCC "-Wextra -std=c++17" (before GCC 10), saying:
// "note: 'struct itk::Size' has no user-provided default constructor"
// as reported by Ignacy Gawedzki "Spurious notes about uninitialized members in C++17"
// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91070
itk::Size<dimensionConstant> actualSize{};
actualSize.Fill(sizeValue);
const auto expectedSize = itk::Size<dimensionConstant>::Filled(sizeValue);
EXPECT_EQ(actualSize, expectedSize);
}
};
// Check Size::Fill for 1D, 2D, and 3D:
check(DimensionConstant<1>);
check(DimensionConstant<2>);
check(DimensionConstant<3>);
}
// Tests Size::CalculateProductOfElements().
TEST(Size, CalculateProductOfElements)
{
const auto checkFilledSizes = [](const auto dimensionConstant) {
// Check at runtime:
for (itk::SizeValueType sizeValue{}; sizeValue <= 2; ++sizeValue)
{
const auto size = itk::Size<dimensionConstant>::Filled(sizeValue);
EXPECT_EQ(size.CalculateProductOfElements(), itk::Math::UnsignedPower(sizeValue, dimensionConstant));
}
// Check at compile-time:
constexpr itk::SizeValueType sizeValue{ 3 };
constexpr auto size = itk::Size<dimensionConstant>::Filled(sizeValue);
static_assert(size.CalculateProductOfElements() == itk::Math::UnsignedPower(sizeValue, dimensionConstant));
};
// Check CalculateProductOfElements() for 1D, 2D, and 3D sizes, filled by `Size::Filled`:
checkFilledSizes(DimensionConstant<1>);
checkFilledSizes(DimensionConstant<2>);
checkFilledSizes(DimensionConstant<3>);
const auto checkArbitrarySize = [](const auto & size) {
EXPECT_EQ(size.CalculateProductOfElements(),
std::accumulate(size.cbegin(), size.cend(), itk::SizeValueType{ 1 }, std::multiplies<>{}));
};
// Do a few more trivial tests.
checkArbitrarySize(itk::MakeSize(2, 4));
checkArbitrarySize(itk::MakeSize(1, 2, 3));
}
|
