Add simple tests for SqliteOperator (#8307)

Improve code coverage by adding a few simple tests for the
SqliteOperator.

Signed-off-by: Remy Suen <remy.suen@gmail.com>

tests/providers/sqlite/operators/__init__.py

@@ -0,0 +1,17 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.

tests/providers/sqlite/operators/test_sqlite.py

@@ -0,0 +1,79 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+import unittest
+
+import pytest
+
+from airflow.models.dag import DAG
+from airflow.providers.sqlite.operators.sqlite import SqliteOperator
+from airflow.utils import timezone
+
+DEFAULT_DATE = timezone.datetime(2015, 1, 1)
+DEFAULT_DATE_ISO = DEFAULT_DATE.isoformat()
+DEFAULT_DATE_DS = DEFAULT_DATE_ISO[:10]
+TEST_DAG_ID = 'unit_test_dag'
+
+
+@pytest.mark.backend("sqlite")
+class TestSqliteOperator(unittest.TestCase):
+    def setUp(self):
+        args = {'owner': 'airflow', 'start_date': DEFAULT_DATE}
+        dag = DAG(TEST_DAG_ID, default_args=args)
+        self.dag = dag
+
+    def tearDown(self):
+        tables_to_drop = ['test_airflow', 'test_airflow2']
+        from airflow.providers.sqlite.hooks.sqlite import SqliteHook
+        with SqliteHook().get_conn() as conn:
+            cur = conn.cursor()
+            for table in tables_to_drop:
+                cur.execute(f"DROP TABLE IF EXISTS {table}")
+
+    def test_sqlite_operator_with_one_statement(self):
+        sql = """
+        CREATE TABLE IF NOT EXISTS test_airflow (
+            dummy VARCHAR(50)
+        );
+        """
+        op = SqliteOperator(task_id='basic_sqlite', sql=sql, dag=self.dag)
+        op.run(start_date=DEFAULT_DATE, end_date=DEFAULT_DATE, ignore_ti_state=True)
+
+    def test_sqlite_operator_with_multiple_statements(self):
+        sql = [
+            "CREATE TABLE IF NOT EXISTS test_airflow (dummy VARCHAR(50))",
+            "INSERT INTO test_airflow VALUES ('X')",
+        ]
+        op = SqliteOperator(
+            task_id='sqlite_operator_with_multiple_statements', sql=sql, dag=self.dag)
+        op.run(start_date=DEFAULT_DATE, end_date=DEFAULT_DATE, ignore_ti_state=True)
+
+    def test_sqlite_operator_with_invalid_sql(self):
+        sql = [
+            "CREATE TABLE IF NOT EXISTS test_airflow (dummy VARCHAR(50))",
+            "INSERT INTO test_airflow2 VALUES ('X')",
+        ]
+
+        from sqlite3 import OperationalError
+        try:
+            op = SqliteOperator(
+                task_id='sqlite_operator_with_multiple_statements', sql=sql, dag=self.dag)
+            op.run(start_date=DEFAULT_DATE, end_date=DEFAULT_DATE, ignore_ti_state=True)
+            pytest.fail("An exception should have been thrown")
+        except OperationalError as e:
+            assert 'no such table: test_airflow2' in str(e)

tests/test_project_structure.py

@@ -46,8 +46,7 @@ MISSING_TEST_FILES = {
     'tests/providers/microsoft/mssql/hooks/test_mssql.py',
     'tests/providers/oracle/operators/test_oracle.py',
     'tests/providers/qubole/hooks/test_qubole.py',
-    'tests/providers/samba/hooks/test_samba.py',
-    'tests/providers/sqlite/operators/test_sqlite.py'
+    'tests/providers/samba/hooks/test_samba.py'
 }