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/utils/core_tests.py

@@ -0,0 +1,54 @@
+# 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.
+# pylint: disable=no-self-use
+import pytest
+
+from superset.utils.core import to_adhoc
+
+
+def test_to_adhoc_generates_deterministic_values():
+    input_1 = {
+        "op": "IS NOT NULL",
+        "col": "LATITUDE",
+        "val": "",
+    }
+
+    input_2 = {**input_1, "col": "LONGITUDE"}
+
+    # The result is the same when given the same input
+    assert to_adhoc(input_1) == to_adhoc(input_1)
+    assert to_adhoc(input_1) == {
+        "clause": "WHERE",
+        "expressionType": "SIMPLE",
+        "isExtra": False,
+        "comparator": "",
+        "operator": "IS NOT NULL",
+        "subject": "LATITUDE",
+        "filterOptionName": "d0908f77d950131db7a69fdc820cb739",
+    }
+
+    # The result is different when given different input
+    assert to_adhoc(input_1) != to_adhoc(input_2)
+    assert to_adhoc(input_2) == {
+        "clause": "WHERE",
+        "expressionType": "SIMPLE",
+        "isExtra": False,
+        "comparator": "",
+        "operator": "IS NOT NULL",
+        "subject": "LONGITUDE",
+        "filterOptionName": "c5f283f727d4dfc6258b351d4a8663bc",
+    }