Refactor out controlUtils.js module + unit tests (#7350)

* [WiP]refactor out a controlUtils.js file

* unit tests

* add missing license

* Addressing comments

superset/assets/spec/javascripts/explore/store_spec.jsx

@@ -0,0 +1,66 @@
+/**
+ * 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 { applyDefaultFormData } from '../../../src/explore/store';
+
+describe('store', () => {
+
+  describe('applyDefaultFormData', () => {
+
+    window.featureFlags = {
+      SCOPED_FILTER: false,
+    };
+
+    it('applies default to formData if the key is missing', () => {
+      const inputFormData = {
+        datasource: '11_table',
+        viz_type: 'table',
+      };
+      let outputFormData = applyDefaultFormData(inputFormData);
+      expect(outputFormData.row_limit).toEqual(10000);
+
+      const inputWithRowLimit = {
+        ...inputFormData,
+        row_limit: 888,
+      };
+      outputFormData = applyDefaultFormData(inputWithRowLimit);
+      expect(outputFormData.row_limit).toEqual(888);
+    });
+
+    it('keeps null if key is defined with null', () => {
+      const inputFormData = {
+        datasource: '11_table',
+        viz_type: 'table',
+        row_limit: null,
+      };
+      const outputFormData = applyDefaultFormData(inputFormData);
+      expect(outputFormData.row_limit).toBe(null);
+    });
+
+    it('removes out of scope, or deprecated keys', () => {
+      const inputFormData = {
+        datasource: '11_table',
+        viz_type: 'table',
+        this_should_no_be_here: true,
+      };
+      const outputFormData = applyDefaultFormData(inputFormData);
+      expect(outputFormData.this_should_no_be_here).toBe(undefined);
+    });
+
+  });
+});