fix(eslint-plugin): no-object-literal-type-assertion: fix as const is reported (#390)

Author: rhysd

Diff for: packages/eslint-plugin/src/rules/no-object-literal-type-assertion.ts

@@ -50,6 +50,12 @@ export default util.createRule<Options, MessageIds>({
         case AST_NODE_TYPES.TSAnyKeyword:
         case AST_NODE_TYPES.TSUnknownKeyword:
           return false;
+        case AST_NODE_TYPES.TSTypeReference:
+          // Ignore `as const` and `<const>` (#166)
+          return (
+            node.typeName.type === AST_NODE_TYPES.Identifier &&
+            node.typeName.name !== 'const'
+          );
         default:
           return true;
       }

Diff for: packages/eslint-plugin/tests/rules/no-object-literal-type-assertion.test.ts

@@ -26,6 +26,8 @@ ruleTester.run('no-object-literal-type-assertion', rule, {
     // Allow cast to 'unknown'
     `const foo = {} as unknown;`,
     `const foo = <unknown> {};`,
+    `const foo = {} as const;`,
+    `const foo = <const> {};`,
     {
       code: `print({ bar: 5 } as Foo)`,
       options: [