add tests for runtime config inside py-config and remove usage of indexURL (#734)

* add integration test for py-config

* fix bug

* fix test

* remove indexURL altogether

* make jest happy

* fix create_proxy import

* check that py-config loads an older version

* add unit test

* suggested changes

* don't use /tmp because of bandit

pyscriptjs/tests/unit/pyconfig.test.ts

@@ -0,0 +1,23 @@
+import type { AppConfig, RuntimeConfig } from '../../src/runtime';
+import { PyConfig } from '../../src/components/pyconfig';
+
+customElements.define('py-config', PyConfig);
+
+describe('PyConfig', () => {
+    let instance: PyConfig;
+    beforeEach(() => {
+        instance = new PyConfig();
+        let runtime_config: RuntimeConfig = {src: "/demo/covfefe.js", name: "covfefe", lang: "covfefe"};
+        let app_config: AppConfig = {autoclose_loader: true, runtimes: [runtime_config]};
+        instance.values = app_config;
+    });
+
+    it('should get the Config to just instantiate', async () => {
+        expect(instance).toBeInstanceOf(PyConfig);
+    });
+
+    it('should load runtime from config and set as script src', () => {
+        instance.loadRuntimes();
+        expect(document.scripts[0].src).toBe("http://localhost/demo/covfefe.js");
+    });
+});

pyscriptjs/tests/unit/runtime.test.ts

@@ -9,6 +9,22 @@ describe('PyodideRuntime', () => {
     let runtime: PyodideRuntime;
     beforeAll(async () => {
         runtime = new PyodideRuntime();
+        /**
+         * Since import { loadPyodide } from 'pyodide';
+         * is not used inside `src/pyodide.ts`, the function
+         * `runtime.initialize();` below which calls
+         * `loadInterpreter` and thus `loadPyodide` results
+         * in an expected issue of:
+         *   ReferenceError: loadPyodide is not defined
+         *
+         * To make jest happy, while also not importing
+         * explicitly inside `src/pyodide.ts`, the
+         * following lines - so as to dynamically import
+         * and make it available in the global namespace
+         * - are used.
+         */
+        const pyodideSpec = await import('pyodide');
+        global.loadPyodide = pyodideSpec.loadPyodide;
         await runtime.initialize();
     });