Build: Run unit tests on more node versions, mac, and windows

.eslintrc.js

@@ -3,6 +3,10 @@ module.exports = {
   extends: ['@storybook/eslint-config-storybook', 'plugin:storybook/recommended'],
   rules: {
     '@typescript-eslint/ban-ts-comment': 'warn',
+    'jest/no-standalone-expect': [
+      'error',
+      { additionalTestBlockFunctions: ['it.skipWindows', 'it.onWindows'] },
+    ],
   },
   overrides: [
     {

.github/workflows/tests-unit.yml

@@ -1,16 +1,36 @@
 name: Unit tests
 
-on: [push]
+on:
+  push:
+    branches:
+      - next
+  pull_request:
+    types: [opened, reopened, labeled, synchronize]
 
 jobs:
   build:
-    name: Core Unit Tests
-    runs-on: ubuntu-latest
+    name: Core Unit Tests node-${{ matrix.node_version }}, ${{ matrix.os }}
+    if: |
+      ${{ github.event.label.name == 'ci:matrix' || 
+      contains(github.event.pull_request.labels.*.name, 'ci:matrix') ||
+      github.event.type == 'push'}}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest]
+        node_version: [12, 14, 16]
+        include:
+          - os: macos-latest
+            node_version: 16
+          - os: windows-latest
+            node_version: 16
+    runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-node@v2
+      - name: Set node version to ${{ matrix.node_version }}
+        uses: actions/setup-node@v2
         with:
-          node-version: "12.x"
+          node-version: ${{ matrix.node_version }}
           cache: yarn
       - name: install, bootstrap
         run: |

addons/a11y/src/components/A11YPanel.test.tsx

@@ -129,11 +129,14 @@ describe('A11YPanel', () => {
     const { getByText } = render(<ThemedA11YPanel />);
     const useChannelArgs = mockedApi.useChannel.mock.calls[0][0];
     act(() => useChannelArgs[EVENTS.RESULT](axeResult));
-    await waitFor(() => {
-      expect(getByText(/Tests completed/)).toBeTruthy();
-      expect(getByText(/Violations/)).toBeTruthy();
-      expect(getByText(/Passes/)).toBeTruthy();
-      expect(getByText(/Incomplete/)).toBeTruthy();
-    });
+    await waitFor(
+      () => {
+        expect(getByText(/Tests completed/)).toBeTruthy();
+        expect(getByText(/Violations/)).toBeTruthy();
+        expect(getByText(/Passes/)).toBeTruthy();
+        expect(getByText(/Incomplete/)).toBeTruthy();
+      },
+      { timeout: 2000 }
+    );
   });
 });