fix(eslint-plugin): [no-unused-vars] check if any variable definition is exported

packages/eslint-plugin/src/util/collectUnusedVariables.ts

@@ -423,9 +423,7 @@ function isMergableExported(variable: TSESLint.Scope.Variable): boolean {
  * @returns True if the variable is exported, false if not.
  */
 function isExported(variable: TSESLint.Scope.Variable): boolean {
-  const definition = variable.defs[0];
-
-  if (definition) {
+  const exportedDefinition = variable.defs.find(definition => {
     let node = definition.node;
 
     if (node.type === AST_NODE_TYPES.VariableDeclarator) {
@@ -435,8 +433,8 @@ function isExported(variable: TSESLint.Scope.Variable): boolean {
     }
 
     return node.parent!.type.indexOf('Export') === 0;
-  }
-  return false;
+  });
+  return exportedDefinition !== undefined;
 }
 
 /**

packages/eslint-plugin/tests/rules/no-unused-vars/no-unused-vars.test.ts

@@ -1072,6 +1072,12 @@ export class Foo {
         typescript: '4.4',
       },
     },
+    `
+interface Foo {
+  bar: string;
+}
+export const Foo = 'bar';
+    `,
   ],
 
   invalid: [