class Test

	def main
		.testList
		.testNilableList
		.testArray
		.testNilableArray
		.testDictionary

	def testList
		t as List<of String> = List<of String>()
		assert 'aoeu' not in t
		t.add('aoeu')
		assert 'aoeu' in t

	def testNilableList
		t as List<of String>? = List<of String>()
		assert 'aoeu' not in t
		t.add('aoeu')
		assert 'aoeu' in t

	def testArray
		t as String[] = String[](2)
		t[0] = 'foo'
		t[1] = 'bar'
		assert 'foo' in t
		assert 'bar' in t
		assert 'baz' not in t

	def testNilableArray
		t as String[]? = String[](2)
		t[0] = 'foo'
		t[1] = 'bar'
		assert 'foo' in t
		assert 'bar' in t
		assert 'baz' not in t

	def testDictionary
		# There shouldn't be an "in" for dictionaries. Use d.keys or d.values to make things clear
		d as Dictionary<of String, int> = Dictionary<of String, int>()
		assert 'one' not in d.keys
		assert 1 not in d.values
		d.add('one', 1)
		assert 'one' in d.keys
		assert 1 in d.values