test: add test for prefer-docusaurus-heading rule

Signed-off-by: Devansu <[email protected]>

packages/eslint-plugin/src/rules/__tests__/prefer-docusaurus-heading.test.ts

@@ -0,0 +1,69 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+import rule from '../prefer-docusaurus-heading';
+import {RuleTester} from './testUtils';
+
+const errorsJSX = [{messageId: 'headings'}] as const;
+
+const ruleTester = new RuleTester({
+  parser: '@typescript-eslint/parser',
+  parserOptions: {
+    ecmaFeatures: {
+      jsx: true,
+    },
+  },
+});
+
+ruleTester.run('prefer-docusaurus-heading', rule, {
+  valid: [
+    {
+      code: "<Heading as='h1'>heading 1</Heading>",
+    },
+    {
+      code: "<Heading as='h2'>heading 2</Heading>",
+    },
+    {
+      code: "<Heading as='h3'>heading 3</Heading>",
+    },
+    {
+      code: "<Heading as='h4'>heading 4</Heading>",
+    },
+    {
+      code: "<Heading as='h5'>heading 5</Heading>",
+    },
+    {
+      code: "<Heading as='h6'>heading 6</Heading>",
+    },
+  ],
+  invalid: [
+    {
+      code: '<h1>heading 1</h1>',
+      errors: errorsJSX,
+    },
+    {
+      code: '<h2>heading 2</h2>',
+      errors: errorsJSX,
+    },
+    {
+      code: '<h3>heading 3</h3>',
+      errors: errorsJSX,
+    },
+    {
+      code: '<h4>heading 4</h4>',
+      errors: errorsJSX,
+    },
+    {
+      code: '<h5>heading 5</h5>',
+      errors: errorsJSX,
+    },
+    {
+      code: '<h6>heading 6</h6>',
+      errors: errorsJSX,
+    },
+  ],
+});