fix(no-export): report on export = usage (#1870)

Author: G-Rath

src/rules/__tests__/no-export.test.ts

@@ -64,6 +64,12 @@ ruleTester.run('no-export', rule, {
       parserOptions: { sourceType: 'module' },
       errors: [{ endColumn: 29, column: 1, messageId: 'unexpectedExport' }],
     },
+    {
+      code: 'export = function() {}; test("a test", () => { expect(1).toBe(1);});',
+      parser: require.resolve('@typescript-eslint/parser'),
+      parserOptions: { sourceType: 'module' },
+      errors: [{ endColumn: 24, column: 1, messageId: 'unexpectedExport' }],
+    },
     {
       code: 'module.exports["invalid"] = function() {};  test("a test", () => { expect(1).toBe(1);});',
       errors: [{ endColumn: 26, column: 1, messageId: 'unexpectedExport' }],

src/rules/no-export.ts

@@ -18,6 +18,7 @@ export default createRule({
     const exportNodes: Array<
       | TSESTree.ExportNamedDeclaration
       | TSESTree.ExportDefaultDeclaration
+      | TSESTree.TSExportAssignment
       | TSESTree.MemberExpression
     > = [];
     let hasTestCase = false;
@@ -36,10 +37,11 @@ export default createRule({
           hasTestCase = true;
         }
       },
-      'ExportNamedDeclaration, ExportDefaultDeclaration'(
+      'ExportNamedDeclaration, ExportDefaultDeclaration, TSExportAssignment'(
         node:
           | TSESTree.ExportNamedDeclaration
-          | TSESTree.ExportDefaultDeclaration,
+          | TSESTree.ExportDefaultDeclaration
+          | TSESTree.TSExportAssignment,
       ) {
         exportNodes.push(node);
       },