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#include <library/cpp/iterator/iterate_values.h>
#include <library/cpp/testing/gtest/gtest.h>
#include <util/generic/algorithm.h>
#include <map>
#include <unordered_map>
using namespace testing;
TEST(IterateValues, ConstMappingIteration) {
const std::map<int, int> squares{
{1, 1},
{2, 4},
{3, 9},
};
EXPECT_THAT(
IterateValues(squares),
ElementsAre(1, 4, 9)
);
const std::unordered_map<int, int> roots{
{49, 7},
{36, 6},
{25, 5},
};
EXPECT_THAT(
IterateValues(roots),
UnorderedElementsAre(5, 6, 7)
);
const std::map<int, std::string> translations{
{1, "one"},
{2, "two"},
{3, "three"},
};
EXPECT_EQ(
Accumulate(IterateValues(translations), std::string{}),
"onetwothree"
);
}
TEST(IterateValues, NonConstMappingIteration) {
std::map<int, int> squares{
{1, 1},
{2, 4},
{3, 9},
};
for (auto& value: IterateValues(squares)) {
value *= value;
}
EXPECT_THAT(
IterateValues(squares),
ElementsAre(1, 16, 81)
);
}
TEST(IterateValues, ConstMultiMappingIteration) {
const std::multimap<int, int> primesBelow{
{2, 2},
{5, 3},
{5, 5},
{11, 7},
{11, 11},
{23, 13},
{23, 17},
{23, 23},
};
EXPECT_THAT(
IterateValues(primesBelow),
ElementsAre(2, 3, 5, 7, 11, 13, 17, 23)
);
auto [begin, end] = primesBelow.equal_range(11);
EXPECT_EQ(std::distance(begin, end), 2);
EXPECT_THAT(
IterateValues(std::vector(begin, end)),
ElementsAre(7, 11)
);
}
TEST(IterateValues, ConstUnorderedMultiMappingIteration) {
const std::unordered_multimap<int, int> primesBelow{
{2, 2},
{5, 3},
{5, 5},
{11, 7},
{11, 11},
{23, 13},
{23, 17},
{23, 23},
};
EXPECT_THAT(
IterateValues(primesBelow),
UnorderedElementsAre(2, 3, 5, 7, 11, 13, 17, 23)
);
auto [begin, end] = primesBelow.equal_range(11);
EXPECT_EQ(std::distance(begin, end), 2);
EXPECT_THAT(
IterateValues(std::vector(begin, end)),
UnorderedElementsAre(7, 11)
);
}
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