Add more tests in utils

Author: armano2

tests/lib/utils/vue-component.js

@@ -96,6 +96,18 @@ function validTests (ext) {
         foo: {}
       }`,
       parserOptions
+    },
+    {
+      filename: `test.${ext}`,
+      code: `export default (Foo as FooConstructor<Foo>).extend({})`,
+      parser: 'typescript-eslint-parser',
+      parserOptions
+    },
+    {
+      filename: `test.${ext}`,
+      code: `export default Foo.extend({})`,
+      parser: 'typescript-eslint-parser',
+      parserOptions
     }
   ]
 }
@@ -132,6 +144,20 @@ function invalidTests (ext) {
       parserOptions,
       errors: [makeError(1)]
     },
+    {
+      filename: `test.${ext}`,
+      code: `export default (Vue as VueConstructor<Vue>).extend({})`,
+      parser: 'typescript-eslint-parser',
+      parserOptions,
+      errors: [makeError(1)]
+    },
+    {
+      filename: `test.${ext}`,
+      code: `export default Vue.extend({})`,
+      parser: 'typescript-eslint-parser',
+      parserOptions,
+      errors: [makeError(1)]
+    },
     {
       filename: `test.${ext}`,
       code: `