duckscript/test/std/string/concat_test.ds

fn test_no_args
    output = concat
    empty = is_empty ${output}

    assert_eq ${output} ""
    assert ${empty}
end

fn test_single_arg
    output = concat 1
    empty = is_empty ${output}

    assert_eq ${output} 1
    assert_false ${empty}
end

fn test_empty
    output = concat "" ""
    empty = is_empty ${output}

    assert_eq ${output} ""
    assert ${empty}
end

fn test_first_empty
    output = concat "" test
    empty = is_empty ${output}

    assert_eq ${output} test
    assert_false ${empty}
end

fn test_second_empty
    output = concat test ""
    empty = is_empty ${output}

    assert_eq ${output} test
    assert_false ${empty}
end

fn test_both_not_empty
    output = concat 1 2
    empty = is_empty ${output}

    assert_eq ${output} 12
    assert_false ${empty}
end

fn test_multiple
    output = concat 1 2 3 4
    empty = is_empty ${output}

    assert_eq ${output} 1234
    assert_false ${empty}
end

fn test_with_spaces
    output = concat 1 "2 3" 4
    empty = is_empty ${output}

    assert_eq ${output} "12 34"
    assert_false ${empty}
end