...
 FAIL  tests/typeFlagUtils.test.ts
  ● typeFlagUtils › getTypeFlags › when code is "type Test = any;", type flags is 1

    TypeError: Cannot read properties of undefined (reading 'id')

      19 |     const declaration = ast.body[0] as TSESTree.TSTypeAliasDeclaration;
      20 |
    > 21 |     return services.getTypeAtLocation(declaration.id);
         |                                                   ^
      22 |   }
      23 |
      24 |   describe('getTypeFlags', () => {

      at id (tests/typeFlagUtils.test.ts:21:51)
      at getType (tests/typeFlagUtils.test.ts:29:20)

 FAIL  tests/getTypeName.test.ts
  ● getTypeName › returns primitive type › when code is type Test = string;, returns string

    TypeError: Cannot read properties of undefined (reading 'id')

      20 |     const declaration = ast.body[0] as TSESTree.TSTypeAliasDeclaration;
      21 |
    > 22 |     return { checker, type: services.getTypeAtLocation(declaration.id) };
         |                                                                    ^
      23 |   }
      24 |
      25 |   function runTest(code: string, expected: string): void {

      at id (tests/getTypeName.test.ts:22:68)
      at getTypes (tests/getTypeName.test.ts:26:31)

Test Suites: 2 failed, 4 passed, 6 total