Open the diff view in split mode by default

Generated-By: PostHog Code
Task-Id: 9673d413-a977-441f-8660-553684a946d1

Author: dmarticus

packages/ui/src/features/sessions/components/DiffStatsChip.test.tsx

@@ -0,0 +1,33 @@
+import type { Task } from "@posthog/shared/domain-types";
+import { render } from "@testing-library/react";
+import type { ReactNode } from "react";
+import { describe, expect, it, vi } from "vitest";
+
+const { useDiffStatsToggle } = vi.hoisted(() => ({
+  useDiffStatsToggle: vi.fn(() => ({
+    filesChanged: 1,
+    linesAdded: 2,
+    linesRemoved: 3,
+    isOpen: false,
+    toggle: vi.fn(),
+  })),
+}));
+
+vi.mock("@posthog/ui/features/code-review/hooks/useDiffStatsToggle", () => ({
+  useDiffStatsToggle,
+}));
+vi.mock("@posthog/ui/primitives/Tooltip", () => ({
+  Tooltip: ({ children }: { children: ReactNode }) => children,
+}));
+
+import { DiffStatsChip } from "./DiffStatsChip";
+
+describe("DiffStatsChip", () => {
+  it("opens the diff view in split mode", () => {
+    const task = { id: "task-1" } as Task;
+
+    render(<DiffStatsChip task={task} />);
+
+    expect(useDiffStatsToggle).toHaveBeenCalledWith(task, "split");
+  });
+});

packages/ui/src/features/sessions/components/DiffStatsChip.tsx

@@ -14,7 +14,7 @@ interface DiffStatsChipProps {
 
 export function DiffStatsChip({ task }: DiffStatsChipProps) {
   const { filesChanged, linesAdded, linesRemoved, isOpen, toggle } =
-    useDiffStatsToggle(task, "expanded");
+    useDiffStatsToggle(task, "split");
 
   if (filesChanged === 0) return null;