tests added for checking transpiled code

Author: Robin Buschmann

test/specs/transpiled-code.spec.ts

@@ -0,0 +1,53 @@
+import {expect, use} from 'chai';
+import {readFileSync, readdirSync, statSync} from 'fs';
+import * as chaiAsPromised from 'chai-as-promised';
+import {containsEs6Syntax} from "../utils/common";
+
+use(chaiAsPromised);
+
+describe('transpiled code', () => {
+
+  const es6FileSubPaths = [
+    'v4/Model.js',
+    'v4/Sequelize.js',
+  ];
+
+  (function run(path: string): void {
+
+    readdirSync(path)
+      .forEach(name => {
+
+        const targetPath = path + '/' + name;
+
+        if (statSync(targetPath).isDirectory()) {
+
+          run(targetPath);
+        } else if (name.slice(-3) === '.js') {
+
+          const parentDir = path.split('/').pop();
+          const target = parentDir + '/' + name;
+          const isEs6 = es6FileSubPaths.indexOf(target) !== -1;
+
+          describe(target, () => {
+
+            it(`should ${isEs6 ? '' : 'NOT '}contain es6 syntax`, () => {
+
+              const content = readFileSync(targetPath).toString();
+
+              try {
+
+                expect(containsEs6Syntax(content)).to.be[isEs6.toString()];
+              } catch (e) {
+
+                e.message = e.message + '\n\n\nAffected content:\n\n' + content + '\n\n\n';
+
+                throw e;
+              }
+            });
+          });
+        }
+      });
+
+  })(__dirname + '/../../lib');
+
+});

test/utils/common.ts

@@ -36,3 +36,19 @@ export function assertInstance(instance: any|any[], expectedValues: any|any[]):
 
     });
 }
+
+/**
+ * Checks if specified value contains es6 syntax or not;
+ * @returns true if it contains es6 syntax
+ */
+export function containsEs6Syntax(value: string): boolean {
+
+  // tslint:disable:max-line-length
+  const ES6_SYNTAX_REGEX = /(^class | class )|(^const | const )|(^let | let )|(^async | async )|(^await | await )|(^yield | yield )|(=>)|function\*|\`/gm;
+
+  return ES6_SYNTAX_REGEX.test(
+    value
+      .replace(/\/\*[\s\S]*?\*\/|([^\\:]|^)\/\/.*$/gm, '') // remove /** */ and /* */ // comments
+      .replace(/(["'])(?:(?=(\\?))\2.)*?\1/gm, '') // remove all quotes
+  );
+}