re-organize components and actions by feature (#5518)

Now the files grouped based on the features instead of
the previous approach of grouping by type.

browser/app/js/browser/__tests__/reducer.test.js

@@ -0,0 +1,70 @@
+/*
+ * Minio Cloud Storage (C) 2018 Minio, Inc.
+ *
+ * Licensed 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 reducer from "../reducer"
+import * as actionsCommon from "../actions"
+
+describe("common reducer", () => {
+  it("should return the initial state", () => {
+    expect(reducer(undefined, {})).toEqual({
+      sidebarOpen: false,
+      storageInfo: {
+        total: 0,
+        free: 0
+      }
+    })
+  })
+
+  it("should handle TOGGLE_SIDEBAR", () => {
+    expect(
+      reducer(
+        { sidebarOpen: false },
+        {
+          type: actionsCommon.TOGGLE_SIDEBAR
+        }
+      )
+    ).toEqual({
+      sidebarOpen: true
+    })
+  })
+
+  it("should handle CLOSE_SIDEBAR", () => {
+    expect(
+      reducer(
+        { sidebarOpen: true },
+        {
+          type: actionsCommon.CLOSE_SIDEBAR
+        }
+      )
+    ).toEqual({
+      sidebarOpen: false
+    })
+  })
+
+  it("should handle SET_STORAGE_INFO", () => {
+    expect(
+      reducer(
+        {},
+        {
+          type: actionsCommon.SET_STORAGE_INFO,
+          storageInfo: { total: 100, free: 40 }
+        }
+      )
+    ).toEqual({
+      storageInfo: { total: 100, free: 40 }
+    })
+  })
+})