Fix playwright

Author: tomusdrw

tests/trace-loading.spec.ts

@@ -1,15 +1,26 @@
-import { test, expect } from "@playwright/test";
+import { test, expect, Page } from "@playwright/test";
 import { FIXTURES, getFixturePath } from "./utils/fixtures";
 
+/**
+ * Upload a file using the file chooser dialog.
+ * react-dropzone's hidden input doesn't respond to Playwright's setInputFiles,
+ * so we click the "Upload file" button and use the file chooser event instead.
+ */
+async function uploadFile(page: Page, filePath: string) {
+  const uploadButton = page.getByRole("button", { name: "Upload file" });
+  await expect(uploadButton).toBeVisible({ timeout: 5000 });
+
+  const [fileChooser] = await Promise.all([page.waitForEvent("filechooser"), uploadButton.click()]);
+  await fileChooser.setFiles(filePath);
+}
+
 test.describe("Trace file loading", () => {
   test("should load io-trace-output.log without crashing", async ({ page }) => {
     await page.goto("/", { waitUntil: "domcontentloaded" });
     await page.evaluate(() => window.localStorage.clear());
 
-    const fileInput = page.locator('input[type="file"]');
     const tracePath = getFixturePath(FIXTURES.IO_TRACE_OUTPUT);
-
-    await fileInput.setInputFiles(tracePath);
+    await uploadFile(page, tracePath);
 
     // Wait for load button to be ready instead of fixed timeout
     const loadButton = page.getByTestId("load-button");
@@ -44,14 +55,13 @@ test.describe("Trace file loading", () => {
     await page.goto("/", { waitUntil: "domcontentloaded" });
     await page.evaluate(() => window.localStorage.clear());
 
-    const fileInput = page.locator('input[type="file"]');
     const tracePath = getFixturePath(FIXTURES.IO_TRACE_OUTPUT);
-
-    await fileInput.setInputFiles(tracePath);
+    await uploadFile(page, tracePath);
 
     // Wait for load button to be ready
     const loadButton = page.getByTestId("load-button");
     await expect(loadButton).toBeVisible({ timeout: 5000 });
+    await expect(loadButton).toBeEnabled({ timeout: 5000 });
     await loadButton.click();
 
     // Wait for program status to appear