Convert gr-diff-preferences_test.js to typescript

Change-Id: Icc7c6387e221ec2c6593da6ff1dc821ee1a4a6cb
diff --git a/polygerrit-ui/app/elements/shared/gr-diff-preferences/gr-diff-preferences_test.js b/polygerrit-ui/app/elements/shared/gr-diff-preferences/gr-diff-preferences_test.js
deleted file mode 100644
index 716ef2f..0000000
--- a/polygerrit-ui/app/elements/shared/gr-diff-preferences/gr-diff-preferences_test.js
+++ /dev/null
@@ -1,105 +0,0 @@
-/**
- * @license
- * Copyright (C) 2016 The Android Open Source Project
- *
- * 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 '../../../test/common-test-setup-karma.js';
-import './gr-diff-preferences.js';
-import {stubRestApi} from '../../../test/test-utils.js';
-
-const basicFixture = fixtureFromElement('gr-diff-preferences');
-
-suite('gr-diff-preferences tests', () => {
-  let element;
-
-  let diffPreferences;
-
-  function valueOf(title, fieldsetid) {
-    const sections = element.$[fieldsetid].querySelectorAll('section');
-    let titleEl;
-    for (let i = 0; i < sections.length; i++) {
-      titleEl = sections[i].querySelector('.title');
-      if (titleEl.textContent.trim() === title) {
-        return sections[i].querySelector('.value');
-      }
-    }
-  }
-
-  setup(() => {
-    diffPreferences = {
-      context: 10,
-      line_wrapping: false,
-      line_length: 100,
-      tab_size: 8,
-      font_size: 12,
-      show_tabs: true,
-      show_whitespace_errors: true,
-      syntax_highlighting: true,
-      manual_review: false,
-      ignore_whitespace: 'IGNORE_NONE',
-    };
-
-    stubRestApi('getDiffPreferences').returns(Promise.resolve(diffPreferences));
-
-    element = basicFixture.instantiate();
-
-    return element.loadData();
-  });
-
-  test('renders', () => {
-    // Rendered with the expected preferences selected.
-    assert.equal(valueOf('Context', 'diffPreferences')
-        .firstElementChild.bindValue, diffPreferences.context);
-    assert.equal(valueOf('Fit to screen', 'diffPreferences')
-        .firstElementChild.checked, diffPreferences.line_wrapping);
-    assert.equal(valueOf('Diff width', 'diffPreferences')
-        .firstElementChild.bindValue, diffPreferences.line_length);
-    assert.equal(valueOf('Tab width', 'diffPreferences')
-        .firstElementChild.bindValue, diffPreferences.tab_size);
-    assert.equal(valueOf('Font size', 'diffPreferences')
-        .firstElementChild.bindValue, diffPreferences.font_size);
-    assert.equal(valueOf('Show tabs', 'diffPreferences')
-        .firstElementChild.checked, diffPreferences.show_tabs);
-    assert.equal(valueOf('Show trailing whitespace', 'diffPreferences')
-        .firstElementChild.checked, diffPreferences.show_whitespace_errors);
-    assert.equal(valueOf('Syntax highlighting', 'diffPreferences')
-        .firstElementChild.checked, diffPreferences.syntax_highlighting);
-    assert.equal(
-        valueOf('Automatically mark viewed files reviewed', 'diffPreferences')
-            .firstElementChild.checked, !diffPreferences.manual_review);
-    assert.equal(valueOf('Ignore Whitespace', 'diffPreferences')
-        .firstElementChild.bindValue, diffPreferences.ignore_whitespace);
-
-    assert.isFalse(element.hasUnsavedChanges);
-  });
-
-  test('save changes', () => {
-    stubRestApi('saveDiffPreferences')
-        .returns(Promise.resolve());
-    const showTrailingWhitespaceCheckbox =
-        valueOf('Show trailing whitespace', 'diffPreferences')
-            .firstElementChild;
-    showTrailingWhitespaceCheckbox.checked = false;
-    element._handleShowTrailingWhitespaceTap();
-
-    assert.isTrue(element.hasUnsavedChanges);
-
-    // Save the change.
-    return element.save().then(() => {
-      assert.isFalse(element.hasUnsavedChanges);
-    });
-  });
-});
-
diff --git a/polygerrit-ui/app/elements/shared/gr-diff-preferences/gr-diff-preferences_test.ts b/polygerrit-ui/app/elements/shared/gr-diff-preferences/gr-diff-preferences_test.ts
new file mode 100644
index 0000000..6c1404e
--- /dev/null
+++ b/polygerrit-ui/app/elements/shared/gr-diff-preferences/gr-diff-preferences_test.ts
@@ -0,0 +1,134 @@
+/**
+ * @license
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * 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 '../../../test/common-test-setup-karma';
+import './gr-diff-preferences';
+import {GrDiffPreferences} from './gr-diff-preferences';
+import {stubRestApi} from '../../../test/test-utils';
+import {DiffPreferencesInfo} from '../../../types/diff';
+import {createDefaultDiffPrefs} from '../../../constants/constants';
+import {IronInputElement} from '@polymer/iron-input';
+import {GrSelect} from '../gr-select/gr-select';
+
+const basicFixture = fixtureFromElement('gr-diff-preferences');
+
+suite('gr-diff-preferences tests', () => {
+  let element: GrDiffPreferences;
+
+  let diffPreferences: DiffPreferencesInfo;
+
+  function valueOf(title: string, id: string) {
+    const sections = element.root?.querySelectorAll(`#${id} section`) ?? [];
+    let titleEl;
+    for (let i = 0; i < sections.length; i++) {
+      titleEl = sections[i].querySelector('.title');
+      if (titleEl?.textContent?.trim() === title) {
+        const el = sections[i].querySelector('.value');
+        if (el) return el;
+      }
+    }
+    assert.fail(`element with title ${title} not found`);
+  }
+
+  setup(async () => {
+    diffPreferences = createDefaultDiffPrefs();
+
+    stubRestApi('getDiffPreferences').returns(Promise.resolve(diffPreferences));
+
+    element = basicFixture.instantiate();
+
+    await element.loadData();
+    await flush();
+  });
+
+  test('renders', () => {
+    // Rendered with the expected preferences selected.
+    const contextInput = valueOf('Context', 'diffPreferences')
+      .firstElementChild as IronInputElement;
+    assert.equal(contextInput.bindValue, `${diffPreferences.context}`);
+
+    const lineWrappingInput = valueOf('Fit to screen', 'diffPreferences')
+      .firstElementChild as HTMLInputElement;
+    assert.equal(lineWrappingInput.checked, diffPreferences.line_wrapping);
+
+    const lineLengthInput = valueOf('Diff width', 'diffPreferences')
+      .firstElementChild as IronInputElement;
+    assert.equal(lineLengthInput.bindValue, `${diffPreferences.line_length}`);
+
+    const tabSizeInput = valueOf('Tab width', 'diffPreferences')
+      .firstElementChild as IronInputElement;
+    assert.equal(tabSizeInput.bindValue, `${diffPreferences.tab_size}`);
+
+    const fontSizeInput = valueOf('Font size', 'diffPreferences')
+      .firstElementChild as IronInputElement;
+    assert.equal(fontSizeInput.bindValue, `${diffPreferences.font_size}`);
+
+    const showTabsInput = valueOf('Show tabs', 'diffPreferences')
+      .firstElementChild as HTMLInputElement;
+    assert.equal(showTabsInput.checked, diffPreferences.show_tabs);
+
+    const showWhitespaceErrorsInput = valueOf(
+      'Show trailing whitespace',
+      'diffPreferences'
+    ).firstElementChild as HTMLInputElement;
+    assert.equal(
+      showWhitespaceErrorsInput.checked,
+      diffPreferences.show_whitespace_errors
+    );
+
+    const syntaxHighlightingInput = valueOf(
+      'Syntax highlighting',
+      'diffPreferences'
+    ).firstElementChild as HTMLInputElement;
+    assert.equal(
+      syntaxHighlightingInput.checked,
+      diffPreferences.syntax_highlighting
+    );
+
+    const manualReviewInput = valueOf(
+      'Automatically mark viewed files reviewed',
+      'diffPreferences'
+    ).firstElementChild as HTMLInputElement;
+    assert.equal(manualReviewInput.checked, !diffPreferences.manual_review);
+
+    const ignoreWhitespaceInput = valueOf(
+      'Ignore Whitespace',
+      'diffPreferences'
+    ).firstElementChild as GrSelect;
+    assert.equal(
+      ignoreWhitespaceInput.bindValue,
+      diffPreferences.ignore_whitespace
+    );
+
+    assert.isFalse(element.hasUnsavedChanges);
+  });
+
+  test('save changes', async () => {
+    const showTrailingWhitespaceCheckbox = valueOf(
+      'Show trailing whitespace',
+      'diffPreferences'
+    ).firstElementChild as HTMLInputElement;
+    showTrailingWhitespaceCheckbox.checked = false;
+    element._handleShowTrailingWhitespaceTap();
+
+    assert.isTrue(element.hasUnsavedChanges);
+
+    // Save the change.
+    await element.save();
+    assert.isFalse(element.hasUnsavedChanges);
+  });
+});