Fix main.test.ts (#1320)

pyscriptjs/src/main.ts

@@ -436,6 +436,10 @@ globalExport('pyscript_get_config', pyscript_get_config);
 
 // main entry point of execution
 const globalApp = new PyScriptApp();
-globalApp.readyPromise = globalApp.main();
+
+// This top level execution causes trouble in jest
+if (typeof jest === 'undefined') {
+    globalApp.readyPromise = globalApp.main();
+}
 
 export { version };

pyscriptjs/tests/unit/main.test.ts

@@ -1,12 +1,7 @@
-import { describe, it, expect } from '@jest/globals';
+import { describe, it, beforeEach, expect } from '@jest/globals';
+import { UserError, ErrorCode } from '../../src/exceptions';
+import { PyScriptApp } from '../../src/main';
 
-describe('Placeholder', () => {
-    it('this is a placeholder, we need to fix and re-enable the commented out tests', () => {
-        expect(true).toBe(true);
-    });
-});
-
-/*
 describe('Test withUserErrorHandler', () => {
     class MyApp extends PyScriptApp {
         myRealMain: any;
@@ -17,7 +12,7 @@ describe('Test withUserErrorHandler', () => {
         }
 
         async _realMain() {
-            await this.myRealMain();
+            this.myRealMain();
         }
     }
 
@@ -68,8 +63,6 @@ describe('Test withUserErrorHandler', () => {
         }
 
         const app = new MyApp(myRealMain);
-        expect.assertions(1);
-        await expect(async () => await app.main()).resolves.toThrow(new Error('Explosions!'));
+        expect(app.main()).rejects.toThrow(new Error('Explosions!'));
     });
 });
-*/

pyscriptjs/tests/unit/setup.ts

@@ -4,3 +4,5 @@ import { directoryManifest } from '../../directoryManifest.mjs';
 jest.unstable_mockModule('../../src/python_package', async () => ({
     python_package: await directoryManifest('./src/python/'),
 }));
+
+globalThis.jest = jest;