 
 let performPythonIncompatibleTests = true
 if performPythonIncompatibleTests {
+    // Handling of "\r\n" not compatible with Python.
+    assert("\r\n\t"[0] == "\r\n")
+    assert("\r\n\t"[1] == "\t")
+
     // dict
     assert(!dict<str, str>())
     assert(["foo": "bar"])

assert(int(1.1) == 1)
assert(int(9.9) == 9)

// json
assert(json.dumps([1, 2, 3]).replace("\n", "").replace(" ", "") == "[1,2,3]")


assert(!set([1, 2, 3]).isdisjoint(set([3, 4, 5])))
assert(set([1, 2, 3]).isdisjoint(set([4, 8, 16])))

// str (conversion)
assert(str(123) == "123")
assert(str(1.23) == "1.23")

// str (indexing)
assert("foobar"[0] == "f")
assert("\r\t"[0] == "\r")
assert("\r\t"[1] == "\t")

// str (truthness)
assert(" ")
assert(!bool(""))

// str (positive and negative indexing)
assert("foo"[-1] == "o")
