## Function Tests.

def f1 return 'f1' end assert(f1() == 'f1')
def f2() return 'f2' end assert(f2() == 'f2')
def f3(a, b, c, d) return c end
assert(f3('a', 'b', 'c', 'd') == 'c')

## Forward call.
val = before_defn()
def before_defn()
	return 'defined after the call'
end
assert(val == 'defined after the call')

## Chain call tests. (concatenative programming)

def fn1(data) return '[fn1:' + data + ']' end
def fn2(data, suffix) return '[fn2:' + data + '|' + suffix + ']' end
def fn3(data) return '[fn3:' + data + ']' end

result = 'data' -> fn1 -> fn2{'suff'} -> fn3
assert(result == '[fn3:[fn2:[fn1:data]|suff]]')

# str_lower(s) function refactored to s.lower attribute.
#result = ' tEST+InG ' -> str_strip -> str_lower
#assert(result == 'test+ing')

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