def METHOD_NAME(cursor):
    """Check that synthetic data container contains the correct dates of data."""
    query = "SELECT DISTINCT(datetime::date) FROM events.calls"
    cursor.execute(query)
    results = set([str(x["datetime"]) for x in cursor.fetchall()])
    expected = ["2016-01-01", "2016-01-02", "2016-01-03"]
    assert results == set(expected)