Add direct test for export = assignment in TS

Author: ProdigySim

tests/files/typescript-export-assign-object.ts

@@ -0,0 +1,5 @@
+const someObj = {
+  FooBar: 12,
+};
+
+export = someObj;

tests/src/rules/named.js

@@ -388,16 +388,31 @@ context('TypeScript', function () {
       'import/resolver': { 'eslint-import-resolver-typescript': true },
     };
 
-    const valid = [];
+    const valid = [
+      test({
+        code: `import { FooBar } from './typescript-export-assign-object'`,
+        parser,
+        settings,
+      }),
+    ];
     const invalid = [
       test({
         code: `import {a} from './export-star-3/b';`,
         filename: testFilePath('./export-star-3/a.js'),
         parser,
         settings,
       }),
+      test({
+        code: `import { NotExported } from './typescript-export-assign-object'`,
+        parser,
+        settings,
+        errors: [{
+          message: `NotExported not found in './typescript-export-assign-object'`,
+          type: 'Identifier',
+        }],
+      }),
     ];
-
+    
     [
       'typescript',
       'typescript-declare',