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/fixtures/unicode_dashboard.py

@@ -0,0 +1,110 @@
+# 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 pandas as pd
+import pytest
+from pandas import DataFrame
+from sqlalchemy import String
+
+from superset import db
+from superset.connectors.sqla.models import SqlaTable
+from superset.models.dashboard import Dashboard
+from superset.models.slice import Slice
+from superset.utils.core import get_example_database
+from tests.dashboard_utils import (
+    create_dashboard,
+    create_slice,
+    create_table_for_dashboard,
+)
+from tests.test_app import app
+
+
+@pytest.fixture()
+def load_unicode_dashboard_with_slice():
+    table_name = "unicode_test"
+    slice_name = "Unicode Cloud"
+    df = _get_dataframe()
+    with app.app_context():
+        dash = _create_unicode_dashboard(df, table_name, slice_name, None)
+        yield
+
+        _cleanup(dash, slice_name)
+
+
+@pytest.fixture()
+def load_unicode_dashboard_with_position():
+    table_name = "unicode_test"
+    slice_name = "Unicode Cloud"
+    df = _get_dataframe()
+    position = "{}"
+    with app.app_context():
+        dash = _create_unicode_dashboard(df, table_name, slice_name, position)
+        yield
+        _cleanup(dash, slice_name)
+
+
+def _get_dataframe():
+    data = _get_unicode_data()
+    return pd.DataFrame.from_dict(data)
+
+
+def _get_unicode_data():
+    return [
+        {"phrase": "Под"},
+        {"phrase": "řšž"},
+        {"phrase": "視野無限廣"},
+        {"phrase": "微風"},
+        {"phrase": "中国智造"},
+        {"phrase": "æøå"},
+        {"phrase": "ëœéè"},
+        {"phrase": "いろはにほ"},
+    ]
+
+
+def _create_unicode_dashboard(
+    df: DataFrame, table_name: str, slice_title: str, position: str
+) -> Dashboard:
+    database = get_example_database()
+    dtype = {
+        "phrase": String(500),
+    }
+    table = create_table_for_dashboard(df, table_name, database, dtype)
+    table.fetch_metadata()
+
+    if slice_title:
+        slice = _create_and_commit_unicode_slice(table, slice_title)
+
+    return create_dashboard("unicode-test", "Unicode Test", position, slice)
+
+
+def _create_and_commit_unicode_slice(table: SqlaTable, title: str):
+    slice = create_slice(title, "word_cloud", table, {})
+    o = db.session.query(Slice).filter_by(slice_name=slice.slice_name).one_or_none()
+    if o:
+        db.session.delete(o)
+    db.session.add(slice)
+    db.session.commit()
+    return slice
+
+
+def _cleanup(dash: Dashboard, slice_name: str) -> None:
+    engine = get_example_database().get_sqla_engine()
+    engine.execute("DROP TABLE IF EXISTS unicode_test")
+    db.session.delete(dash)
+    if slice_name:
+        slice = db.session.query(Slice).filter_by(slice_name=slice_name).one_or_none()
+        db.session.delete(slice)
+    db.session.commit()