Break ThemeChoicePanel into a separate component (#6998)

* Break ThemeChoicePanel into a separate component

* Tests for ThemeChoicePanel

* i18n fixes

* Fix copyright for ThemeChoicePanel

test/components/views/settings/ThemeChoicePanel-test.tsx

@@ -0,0 +1,60 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+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 React from 'react';
+import { mount } from "enzyme";
+
+import '../../../skinned-sdk';
+import * as TestUtils from "../../../test-utils";
+import _ThemeChoicePanel from '../../../../src/components/views/settings/ThemeChoicePanel';
+
+const ThemeChoicePanel = TestUtils.wrapInMatrixClientContext(_ThemeChoicePanel);
+
+// Avoid errors about global.matchMedia. See:
+// https://jestjs.io/docs/manual-mocks#mocking-methods-which-are-not-implemented-in-jsdom
+Object.defineProperty(window, 'matchMedia', {
+    writable: true,
+    value: jest.fn().mockImplementation(query => ({
+        matches: false,
+        media: query,
+        onchange: null,
+        addListener: jest.fn(), // Deprecated
+        removeListener: jest.fn(), // Deprecated
+        addEventListener: jest.fn(),
+        removeEventListener: jest.fn(),
+        dispatchEvent: jest.fn(),
+    })),
+});
+
+// Fake random strings to give a predictable snapshot
+jest.mock(
+    'matrix-js-sdk/src/randomstring',
+    () => {
+        return {
+            randomString: () => "abdefghi",
+        };
+    },
+);
+
+describe('ThemeChoicePanel', () => {
+    it('renders the theme choice UI', () => {
+        TestUtils.stubClient();
+        const wrapper = mount(
+            <ThemeChoicePanel />,
+        );
+        expect(wrapper).toMatchSnapshot();
+    });
+});

test/components/views/settings/__snapshots__/ThemeChoicePanel-test.tsx.snap

@@ -0,0 +1,111 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`ThemeChoicePanel renders the theme choice UI 1`] = `
+<Wrapper>
+  <ThemeChoicePanel>
+    <div
+      className="mx_SettingsTab_section mx_ThemeChoicePanel"
+    >
+      <span
+        className="mx_SettingsTab_subheading"
+      >
+        Theme
+      </span>
+      <div
+        className="mx_ThemeSelectors"
+      >
+        <StyledRadioGroup
+          definitions={
+            Array [
+              Object {
+                "className": "mx_ThemeSelector_light",
+                "disabled": true,
+                "label": "Light",
+                "value": "light",
+              },
+              Object {
+                "className": "mx_ThemeSelector_dark",
+                "disabled": true,
+                "label": "Dark",
+                "value": "dark",
+              },
+            ]
+          }
+          name="theme"
+          onChange={[Function]}
+          outlined={true}
+        >
+          <StyledRadioButton
+            checked={false}
+            childrenInLabel={true}
+            className="mx_ThemeSelector_light"
+            disabled={true}
+            name="theme"
+            onChange={[Function]}
+            outlined={true}
+            value="light"
+          >
+            <label
+              className="mx_RadioButton mx_ThemeSelector_light mx_RadioButton_disabled mx_RadioButton_outlined"
+            >
+              <input
+                checked={false}
+                disabled={true}
+                name="theme"
+                onChange={[Function]}
+                type="radio"
+                value="light"
+              />
+              <div>
+                <div />
+              </div>
+              <div
+                className="mx_RadioButton_content"
+              >
+                Light
+              </div>
+              <div
+                className="mx_RadioButton_spacer"
+              />
+            </label>
+          </StyledRadioButton>
+          <StyledRadioButton
+            checked={false}
+            childrenInLabel={true}
+            className="mx_ThemeSelector_dark"
+            disabled={true}
+            name="theme"
+            onChange={[Function]}
+            outlined={true}
+            value="dark"
+          >
+            <label
+              className="mx_RadioButton mx_ThemeSelector_dark mx_RadioButton_disabled mx_RadioButton_outlined"
+            >
+              <input
+                checked={false}
+                disabled={true}
+                name="theme"
+                onChange={[Function]}
+                type="radio"
+                value="dark"
+              />
+              <div>
+                <div />
+              </div>
+              <div
+                className="mx_RadioButton_content"
+              >
+                Dark
+              </div>
+              <div
+                className="mx_RadioButton_spacer"
+              />
+            </label>
+          </StyledRadioButton>
+        </StyledRadioGroup>
+      </div>
+    </div>
+  </ThemeChoicePanel>
+</Wrapper>
+`;