feat(desktop): more e2e tests (#13975)

packages/app/e2e/prompt/prompt-drop-file.spec.ts

@@ -0,0 +1,30 @@
+import { test, expect } from "../fixtures"
+import { promptSelector } from "../selectors"
+
+test("dropping an image file adds an attachment", async ({ page, gotoSession }) => {
+  await gotoSession()
+
+  const prompt = page.locator(promptSelector)
+  await prompt.click()
+
+  const png = "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mP8/x8AAwMCAO3+4uQAAAAASUVORK5CYII="
+  const dt = await page.evaluateHandle((b64) => {
+    const dt = new DataTransfer()
+    const bytes = Uint8Array.from(atob(b64), (c) => c.charCodeAt(0))
+    const file = new File([bytes], "drop.png", { type: "image/png" })
+    dt.items.add(file)
+    return dt
+  }, png)
+
+  await page.dispatchEvent("body", "drop", { dataTransfer: dt })
+
+  const img = page.locator('img[alt="drop.png"]').first()
+  await expect(img).toBeVisible()
+
+  const remove = page.getByRole("button", { name: "Remove attachment" }).first()
+  await expect(remove).toBeVisible()
+
+  await img.hover()
+  await remove.click()
+  await expect(page.locator('img[alt="drop.png"]')).toHaveCount(0)
+})