tests/upgrade/rules/test_db_api_functions.py

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# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
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#
#   http://www.apache.org/licenses/LICENSE-2.0
#
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from unittest import TestCase

from airflow.hooks.base_hook import BaseHook
from airflow.hooks.dbapi_hook import DbApiHook
from airflow.contrib.hooks.bigquery_hook import BigQueryHook
from airflow.upgrade.rules.db_api_functions import DbApiRule


class MyHook(BaseHook):
    def run(self, sql):
        pass

    def get_pandas_df(self, sql):
        pass

    def get_conn(self):
        pass


class GrandChildHook(MyHook):
    def __init__(self, foo, bar):
        self.foo = foo
        self.bar = bar

    def get_records(self, sql):
        pass


class ProperDbApiHook(DbApiHook, BigQueryHook):
    def bulk_dump(self, table, tmp_file):
        pass

    def bulk_load(self, table, tmp_file):
        pass

    def get_records(self, sql, *kwargs):
        pass

    def run(self, sql, *kwargs):
        pass

    def get_pandas_df(self, sql, *kwargs):
        pass


class TestSqlHookCheck(TestCase):
    def test_fails_on_incorrect_hook(self):
        db_api_rule_failures = DbApiRule().check()
        myhook_errors = [d for d in db_api_rule_failures if "MyHook" in d]
        grandchild_errors = [d for d in db_api_rule_failures if "GrandChild" in d]
        self.assertEqual(len(myhook_errors), 2)
        self.assertEqual(len(grandchild_errors), 3)
        proper_db_api_hook_failures = [
            failure for failure in db_api_rule_failures if "ProperDbApiHook" in failure
        ]
        self.assertEqual(len(proper_db_api_hook_failures), 0)