import "@std/testing"
import "@std/mem"

borrows_supplied_arguments test {
    first [3;0]mut u8 := ['r', 'u', 'n']
    empty [0;0]u8 := []
    spaced [9;0]u8 := ['t', 'w', 'o', ' ', 'w', 'o', 'r', 'd', 's']
    pointers [3][*;0]u8 :: [(&first).ptr, (&empty).ptr, (&spaced).ptr]
    args :: Args{ values = pointers[..] }
    try testing.expect_equal(usize(3), argument_count(args))
    if (argument(args, 0)) |value| {
        first[0] = 'f'
        try testing.expect(mem.eql(value, "fun"))
    } else { try testing.expect(false) }
    if (argument(args, 1)) |value| {
        try testing.expect_equal(usize(0), value.len)
    } else { try testing.expect(false) }
    if (argument(args, 2)) |value| {
        try testing.expect(mem.eql(value, "two words"))
    } else { try testing.expect(false) }
    try testing.expect(argument(args, 3) == null)
    try testing.expect(argument(args, maxval!(usize)) == null)

    none :: Args{ values = pointers[0..0] }
    try testing.expect_equal(usize(0), argument_count(none))
    try testing.expect(argument(none, 0) == null)
}