refactor Meteor app assertion function to be more flexible

tools/modern-tests/assertions.js

@@ -5,6 +5,34 @@
 import fs from 'fs-extra';
 import path from 'path';
 
+/**
+ * Helper function to assert that a Meteor app is running correctly
+ * @param {number} port - Port where the app is running
+ * @param {Object} options - Options for the assertion
+ * @param {string} options.title - Expected content in the title
+ * @param {string} options.h1 - Expected content in the h1 element
+ * @returns {Promise<void>}
+ */
+export async function assertMeteorApp(port, options = {}) {
+  // Extract options with default values
+  const { title: inTitle, h1: inH1 } = options;
+
+  // Navigate to the app
+  await page.goto(`http://localhost:${port}`);
+
+  // Check the title if specified
+  if (inTitle) {
+    const title = await page.title();
+    expect(title).toMatch(new RegExp(inTitle));
+  }
+
+  // Check for static content if specified
+  if (inH1) {
+    const h1Text = await page.$eval('h1', el => el.textContent);
+    expect(h1Text).toMatch(new RegExp(inH1));
+  }
+}
+
 /**
  * Helper function to assert that a Meteor React app is running correctly
  * @param {number} port - Port where the app is running
@@ -14,19 +42,12 @@ import path from 'path';
  * @returns {Promise<void>}
  */
 export async function assertMeteorReactApp(port, options = {}) {
-  // Extract options with default values
-  const { title: inTitle = "react", h1: inH1 = "Welcome to Meteor!" } = options;
-
-  // Navigate to the app
-  await page.goto(`http://localhost:${port}`);
-
-  // Check the title
-  const title = await page.title();
-  expect(title).toMatch(new RegExp(inTitle));
-
-  // Check for static content
-  const h1Text = await page.$eval('h1', el => el.textContent);
-  expect(h1Text).toMatch(new RegExp(inH1));
+  const reactOptions = {
+    title: "react",
+    h1: "Welcome to Meteor!",
+    ...options
+  };
+  await assertMeteorApp(port, reactOptions);
 }
 
 /**