def test_open(json_mock):
reader = JsonInputReader()
json_mock.load.return_value = 'sample output'
assert reader._JsonInputReader__data == None
reader.open(123)
json_mock.load.assert_called_with(123)
assert reader._JsonInputReader__data == 'sample output'
def test_open(json_mock):
reader = JsonInputReader()
json_mock.load.return_value = 'sample output'
assert reader._JsonInputReader__data == None
reader.open(123)
json_mock.load.assert_called_with(123)
assert reader._JsonInputReader__data == 'sample output'
