test: removed unicode_test example from unit tests (#11131)

* Removed depemdency to unicode example in tests config.

* Added common methods for creating dashboards for tests.

* Added fixtures to all tests which were using unicode example.

* Added cleanup for unicode_test table

* Removed unnecessary fixture parts of unicode dashboard tests

* Parametrized creating slice for tests

* Moved fixtures for unicode test to separate file and refactored to several methods. Added param types and return types.

* Cleandup after fix

* Changed variable names to more readable

* Added cleanup for dashboards and slices

* Applied unicode fixture to charts api tests

* Update schema variable to dtype in dashboard utils

Co-authored-by: Ville Brofeldt <33317356+villebro@users.noreply.github.com>

* Changed variable schema to dtype in dashboards. Replaced accessing first element with one_or_none

Co-authored-by: Ville Brofeldt <33317356+villebro@users.noreply.github.com>

tests/dashboard_utils.py

@@ -0,0 +1,85 @@
+# 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
+
+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]
+) -> 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)
+    table.database = database
+    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, slice: 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 slice is not None:
+        dash.slices = [slice]
+    db.session.merge(dash)
+    db.session.commit()
+
+    return dash