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36 * \brief Tests for enumeration helpers
38 * \author Mark Abraham <mark.j.abraham@gmail.com>
39 * \ingroup module_utility
43 #include "gromacs/utility/enumerationhelpers.h"
49 #include <gtest/gtest.h>
51 #include "gromacs/utility/arrayref.h"
53 #include "testutils/testasserts.h"
60 //! Type to use in testing
69 TEST(EnumerationHelpersTest, EnumerationWrapperWorks)
71 EnumerationWrapper<Foo> iter;
73 // Range-based for works
77 EXPECT_EQ(static_cast<int>(c), i++);
80 // Normal iterators work
82 for (auto c = iter.begin(); c != iter.end(); ++c)
84 EXPECT_EQ(static_cast<int>(*c), i++);
87 auto a = std::begin(iter);
88 auto b = std::begin(iter);
91 ASSERT_EQ(*(a++), Foo::Bar);
92 ASSERT_EQ(*(++b), Foo::Baz);
95 TEST(EnumerationHelpersTest, EnumerationArrayWorks)
97 using FooArray = EnumerationArray<Foo, std::string>;
98 const FooArray fooStrings{ { "Bar", "Baz", "Fooz" } };
100 // Keys give you the constants associated with each array index.
102 for (auto k : FooArray::keys())
104 EXPECT_EQ(static_cast<int>(k), i++);
107 // Keys give you the constants associated with each array index.
109 for (auto k : keysOf(fooStrings))
111 EXPECT_EQ(static_cast<int>(k), i++);
114 // Using iterators and operator[] gives the array values.
116 for (const auto& s : fooStrings)
118 EXPECT_EQ(s, fooStrings[i++]);
121 // Using reverse iterators gives the array values.
123 for (auto s = fooStrings.rbegin(); s != fooStrings.rend(); ++s)
125 EXPECT_EQ((*s), fooStrings[i--]);
128 // Incrementing iterators works
129 auto x = std::begin(fooStrings);
130 EXPECT_EQ(*x, "Bar");
132 EXPECT_EQ(*x, "Baz");
134 EXPECT_EQ(*x, "Fooz");
136 // Operator[] can be used with enumeration values.
137 EXPECT_EQ(fooStrings[Foo::Bar], "Bar");
138 EXPECT_EQ(fooStrings[Foo::Baz], "Baz");
139 EXPECT_EQ(fooStrings[Foo::Fooz], "Fooz");
142 TEST(EnumerationHelpersTest, EnumerationArrayCountIsSafe)
144 using FooArray = EnumerationArray<Foo, std::string>;
145 const FooArray fooStrings{ { "Bar", "Baz", "Fooz" } };
147 // Ensures that the assertions in EnumerationArray::operator[]
148 // would fire if an out-range value (including Count) was used.
149 EXPECT_LE(fooStrings.size(), size_t(Foo::Count));
151 // Tests (where possible) that those assertions do fire in a build
152 // with debug behavior.
153 GMX_EXPECT_DEATH_IF_SUPPORTED(fooStrings[Foo::Count], "index out of range");
158 void func(ArrayRef<const int> a)
163 TEST(EnumerationHelpersTest, ArrayRefOfEnumerationArrayWorks)
165 using FooArray = EnumerationArray<Foo, int>;
167 FooArray counts = { { 2, 3, 1 } };
169 // Test that explicit conversion works
170 ArrayRef<const int> arrayRef(counts);
171 EXPECT_EQ(3, arrayRef[1]);
173 // Test that implicit conversion works
176 // Note that ArrayRef<int> arrayRef(counts) does not compile, as
177 // expected, but we can't test for that.