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optional.cc
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92 lines (58 loc) · 1.52 KB
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#include <gtest/gtest.h>
#include <type_traits>
#include "allscale/utils/optional.h"
#include "allscale/utils/string_utils.h"
namespace allscale {
namespace utils {
TEST(Optional,Basics) {
using opt_type = optional<int>;
EXPECT_TRUE(std::is_copy_constructible<opt_type>::value);
EXPECT_TRUE(std::is_move_constructible<opt_type>::value);
EXPECT_TRUE(std::is_copy_assignable<opt_type>::value);
EXPECT_TRUE(std::is_move_assignable<opt_type>::value);
EXPECT_TRUE(std::is_destructible<opt_type>::value);
}
TEST(Optional, Copy) {
using opt_t = optional<int>;
opt_t none;
opt_t zero = 0;
opt_t one = 1;
EXPECT_FALSE(bool(none));
EXPECT_TRUE(bool(zero));
EXPECT_TRUE(bool(one));
EXPECT_LT(none,zero);
EXPECT_LT(zero,one);
EXPECT_EQ(none,none);
EXPECT_EQ(zero,zero);
EXPECT_EQ(one,one);
opt_t cpy = one;
EXPECT_TRUE(bool(cpy));
EXPECT_TRUE(bool(one));
EXPECT_EQ(one,cpy);
}
TEST(Optional, Move) {
using opt_t = optional<int>;
opt_t one = 1;
opt_t mov = std::move(one);
EXPECT_TRUE(bool(mov));
EXPECT_FALSE(bool(one));
EXPECT_EQ(1,*mov);
}
TEST(Optional, Int) {
using opt_t = optional<int>;
opt_t none;
opt_t zero = 0;
opt_t one = 1;
EXPECT_FALSE(bool(none));
EXPECT_TRUE(bool(zero));
EXPECT_TRUE(bool(one));
EXPECT_LT(none,zero);
EXPECT_LT(zero,one);
}
TEST(Optional, Print) {
using opt_t = optional<int>;
EXPECT_EQ("Nothing",toString(opt_t()));
EXPECT_EQ("Just(1)",toString(opt_t(1)));
}
} // end namespace utils
} // end namespace allscale