Initial commit: Developer Tools MVP with visual editor

- Complete React app with 7 developer tools
- JSON Tool with visual structured editor
- Serialize Tool with visual structured editor
- URL, Base64, CSV/JSON, Beautifier, Diff tools
- Responsive navigation with dropdown menu
- Dark/light mode toggle
- Mobile-responsive design with sticky header
- All tools working with copy/paste functionality

node_modules/eslint-plugin-jsx-a11y/__tests__/src/util/getAccessibleChildText-test.js

@@ -0,0 +1,174 @@
+import test from 'tape';
+import { elementType } from 'jsx-ast-utils';
+
+import getAccessibleChildText from '../../../src/util/getAccessibleChildText';
+import JSXAttributeMock from '../../../__mocks__/JSXAttributeMock';
+import JSXElementMock from '../../../__mocks__/JSXElementMock';
+
+test('getAccessibleChildText', (t) => {
+  t.equal(
+    getAccessibleChildText(JSXElementMock(
+      'a',
+      [JSXAttributeMock('aria-label', 'foo')],
+    ), elementType),
+    'foo',
+    'returns the aria-label when present',
+  );
+
+  t.equal(
+    getAccessibleChildText(JSXElementMock(
+      'a',
+      [JSXAttributeMock('aria-label', 'foo')],
+      [{ type: 'JSXText', value: 'bar' }],
+    ), elementType),
+    'foo',
+    'returns the aria-label instead of children',
+  );
+
+  t.equal(
+    getAccessibleChildText(JSXElementMock(
+      'a',
+      [JSXAttributeMock('aria-hidden', 'true')],
+    ), elementType),
+    '',
+    'skips elements with aria-hidden=true',
+  );
+
+  t.equal(
+    getAccessibleChildText(JSXElementMock(
+      'a',
+      [],
+      [{ type: 'JSXText', value: 'bar' }],
+    ), elementType),
+    'bar',
+    'returns literal value for JSXText child',
+  );
+
+  t.equal(
+    getAccessibleChildText(JSXElementMock(
+      'a',
+      [],
+      [JSXElementMock('img', [
+        JSXAttributeMock('src', 'some/path'),
+        JSXAttributeMock('alt', 'a sensible label'),
+      ])],
+    ), elementType),
+    'a sensible label',
+    'returns alt text for img child',
+  );
+
+  t.equal(
+    getAccessibleChildText(JSXElementMock(
+      'a',
+      [],
+      [JSXElementMock('span', [
+        JSXAttributeMock('alt', 'a sensible label'),
+      ])],
+    ), elementType),
+    '',
+    'returns blank when alt tag is used on arbitrary element',
+  );
+
+  t.equal(
+    getAccessibleChildText(JSXElementMock(
+      'a',
+      [],
+      [{ type: 'Literal', value: 'bar' }],
+    ), elementType),
+    'bar',
+    'returns literal value for JSXText child',
+  );
+
+  t.equal(
+    getAccessibleChildText(JSXElementMock(
+      'a',
+      [],
+      [{ type: 'Literal', value: ' bar   ' }],
+    ), elementType),
+    'bar',
+    'returns trimmed literal value for JSXText child',
+  );
+
+  t.equal(
+    getAccessibleChildText(JSXElementMock(
+      'a',
+      [],
+      [{ type: 'Literal', value: 'foo         bar' }],
+    ), elementType),
+    'foo bar',
+    'returns space-collapsed literal value for JSXText child',
+  );
+
+  t.equal(
+    getAccessibleChildText(JSXElementMock(
+      'a',
+      [],
+      [{ type: 'Literal', value: 'foo, bar. baz? foo; bar:' }],
+    ), elementType),
+    'foo bar baz foo bar',
+    'returns punctuation-stripped literal value for JSXText child',
+  );
+
+  t.equal(
+    getAccessibleChildText(JSXElementMock(
+      'a',
+      [],
+      [JSXElementMock(
+        'span',
+        [],
+        [{ type: 'Literal', value: 'bar' }],
+      )],
+    ), elementType),
+    'bar',
+    'returns recursive value for JSXElement child',
+  );
+
+  t.equal(
+    getAccessibleChildText(JSXElementMock(
+      'a',
+      [],
+      [JSXElementMock(
+        'span',
+        [],
+        [JSXElementMock(
+          'span',
+          [JSXAttributeMock('aria-hidden', 'true')],
+        )],
+      )],
+    ), elementType),
+    '',
+    'skips children with aria-hidden-true',
+  );
+
+  t.equal(
+    getAccessibleChildText(JSXElementMock(
+      'a',
+      [],
+      [{ type: 'Literal', value: 'foo' }, { type: 'Literal', value: 'bar' }],
+    ), elementType),
+    'foo bar',
+    'joins multiple children properly - no spacing',
+  );
+
+  t.equal(
+    getAccessibleChildText(JSXElementMock(
+      'a',
+      [],
+      [{ type: 'Literal', value: ' foo ' }, { type: 'Literal', value: ' bar ' }],
+    ), elementType),
+    'foo bar',
+    'joins multiple children properly - with spacing',
+  );
+
+  t.equal(
+    getAccessibleChildText(JSXElementMock(
+      'a',
+      [],
+      [{ type: 'Literal', value: 'foo' }, { type: 'Unknown' }, { type: 'Literal', value: 'bar' }],
+    ), elementType),
+    'foo bar',
+    'skips unknown elements',
+  );
+
+  t.end();
+});