refactor(tests): decouple unittests from integration tests (#15473)

* refactor move all tests to be under integration_tests package

* refactor decouple unittests from integration tests - commands

* add unit_tests package

* fix celery_tests.py

* fix wrong FIXTURES_DIR value

tests/integration_tests/dashboard_utils.py

@@ -0,0 +1,95 @@
+# 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.
+"""Utils to provide dashboards for tests"""
+
+import json
+from typing import Any, Dict, List, Optional
+
+from pandas import DataFrame
+
+from superset import ConnectorRegistry, db
+from superset.connectors.sqla.models import SqlaTable
+from superset.models.core import Database
+from superset.models.dashboard import Dashboard
+from superset.models.slice import Slice
+
+
+def create_table_for_dashboard(
+    df: DataFrame,
+    table_name: str,
+    database: Database,
+    dtype: Dict[str, Any],
+    table_description: str = "",
+    fetch_values_predicate: Optional[str] = None,
+) -> SqlaTable:
+    df.to_sql(
+        table_name,
+        database.get_sqla_engine(),
+        if_exists="replace",
+        chunksize=500,
+        dtype=dtype,
+        index=False,
+        method="multi",
+    )
+
+    table_source = ConnectorRegistry.sources["table"]
+    table = (
+        db.session.query(table_source).filter_by(table_name=table_name).one_or_none()
+    )
+    if not table:
+        table = table_source(table_name=table_name)
+    if fetch_values_predicate:
+        table.fetch_values_predicate = fetch_values_predicate
+    table.database = database
+    table.description = table_description
+    db.session.merge(table)
+    db.session.commit()
+
+    return table
+
+
+def create_slice(
+    title: str, viz_type: str, table: SqlaTable, slices_dict: Dict[str, str]
+) -> Slice:
+    return Slice(
+        slice_name=title,
+        viz_type=viz_type,
+        datasource_type="table",
+        datasource_id=table.id,
+        params=json.dumps(slices_dict, indent=4, sort_keys=True),
+    )
+
+
+def create_dashboard(
+    slug: str, title: str, position: str, slices: List[Slice]
+) -> Dashboard:
+    dash = db.session.query(Dashboard).filter_by(slug=slug).one_or_none()
+
+    if not dash:
+        dash = Dashboard()
+    dash.dashboard_title = title
+    if position is not None:
+        js = position
+        pos = json.loads(js)
+        dash.position_json = json.dumps(pos, indent=4)
+    dash.slug = slug
+    if slices is not None:
+        dash.slices = slices
+    db.session.merge(dash)
+    db.session.commit()
+
+    return dash