duckscript/test/std/string/substring_test.ds

fn test_empty_with_range
    output = substring "" 0 0

    assert_eq ${output} "false"
end

fn test_text_with_empty_range
    output = substring "test" 0 0

    assert_eq ${output} ""
end

fn test_text_with_range
    output = substring "test" 1 3

    assert_eq ${output} "es"
end

fn test_text_with_start
    output = substring "test" 1

    assert_eq ${output} "est"
end

fn test_text_with_end
    output = substring "test" -2

    assert_eq ${output} "te"
end

fn test_text_with_range_and_start_too_big
    output = substring "test" 6 8

    assert_eq ${output} "false"
end

fn test_text_with_start_too_big
    output = substring "test" 6

    assert_eq ${output} "false"
end

fn test_text_with_range_and_end_too_big
    output = substring "test" 0 8

    assert_eq ${output} "false"
end