23   BOOST_TEST(std::is_nothrow_move_assignable<axis::variable<>>::value);  in main()
24   BOOST_TEST(std::is_nothrow_move_constructible<axis::variable<>>::value);  in main()
28     BOOST_TEST_THROWS(axis::variable<>(std::vector<double>{}), std::invalid_argument);  in main()
29     BOOST_TEST_THROWS(axis::variable<>({1.0}), std::invalid_argument);  in main()
30     BOOST_TEST_THROWS(axis::variable<>({1.0, 1.0}), std::invalid_argument);  in main()
31     BOOST_TEST_THROWS(axis::variable<>({1.0, -1.0}), std::invalid_argument);  in main()
36     axis::variable<> a{{-1, 0, 1}, "foo"};  in main()
39     BOOST_TEST_EQ(static_cast<const axis::variable<>&>(a).metadata(), "foo");  in main()
41     BOOST_TEST_EQ(static_cast<const axis::variable<>&>(a).metadata(), "bar");  in main()
61     axis::variable<> b;  in main()
65     axis::variable<> c = std::move(b);  in main()
67     axis::variable<> d;  in main()
71     axis::variable<> e{-2, 0, 2};  in main()
77     axis::variable<double, axis::null_type, axis::option::circular_t> a{-1, 1, 2};  in main()
97     using pii_t = std::pair<axis::index_type, axis::index_type>;  in main()
98     axis::variable<double, axis::null_type, axis::option::growth_t> a{0, 1};  in main()
124     test_axis_iterator(axis::variable<>{1, 2, 3}, 0, 2);  in main()
126         axis::variable<double, axis::null_type, axis::option::circular_t>{1, 2, 3}, 0, 2);  in main()
131     using A = axis::variable<>;  in main()
149     using A = axis::variable<double, axis::null_type, axis::option::circular_t>;  in main()