## Core builtin functions and attribute tests.

assert(hex(12648430) == '0xc0ffee')
assert(hex(255) == '0xff' and hex(10597059) == '0xa1b2c3')
assert(hex(-4294967295) == '-0xffffffff') ## the largest.

## string attributes.
assert(''.length == 0)
assert('test'.length == 4)
assert(''.lower == '' and ''.upper == '')
assert('already+lower '.lower == 'already+lower ')
assert('ALREADY+UPPER '.upper == 'ALREADY+UPPER ')
assert('tEST+InG'.lower == 'test+ing')
assert('tEST+InG'.upper == 'TEST+ING')

assert(' trim '.strip == 'trim')
assert(''.strip == '')

## List attribute
assert([].length == 0)
assert([1, 2, 3].length == 3)

## Function
assert(print.arity == -1)
assert(hex.arity == 1)
assert(function(a, b)end .arity == 2)
assert(print.name == "print")
def fn(p1, p2, p3) end
assert(fn.name == "fn")
assert(fn.arity == 3)

## String functions
assert(str_sub('c programming', 2, 11) == 'programming')
assert(str_sub('foobarbaz', 2, 3) == 'oba')
assert(str_sub('abcdef', 1, 2) == 'bc')
assert(str_sub('I am a boy', 0, 4) == 'I am')
assert(str_sub('programming', 2, 0) == '')
assert(str_sub('foobar', 5, 0) == '')
assert(str_sub('foobar', 0, 6) == 'foobar')
assert(str_sub('', 0, 0) == '')

## range
r = 1..5
assert(r.as_list == [1, 2, 3, 4])
assert(r.first == 1)
assert(r.last == 5)

# If we got here, that means all test were passed.
print('All TESTS PASSED')