Refine issue workflow surfaces and live updates

ui/src/lib/navigation-scroll.test.ts

@@ -0,0 +1,86 @@
+// @vitest-environment jsdom
+
+import { describe, expect, it, vi } from "vitest";
+import {
+  resetNavigationScroll,
+  SIDEBAR_SCROLL_RESET_STATE,
+  shouldResetScrollOnNavigation,
+} from "./navigation-scroll";
+
+describe("navigation-scroll", () => {
+  it("resets scroll only for flagged sidebar navigation", () => {
+    expect(
+      shouldResetScrollOnNavigation({
+        previousPathname: "/issues",
+        pathname: "/dashboard",
+        navigationType: "PUSH",
+        state: SIDEBAR_SCROLL_RESET_STATE,
+      }),
+    ).toBe(true);
+
+    expect(
+      shouldResetScrollOnNavigation({
+        previousPathname: "/issues",
+        pathname: "/dashboard",
+        navigationType: "PUSH",
+        state: null,
+      }),
+    ).toBe(false);
+  });
+
+  it("preserves scroll restoration for browser history navigation even for sidebar entries", () => {
+    expect(
+      shouldResetScrollOnNavigation({
+        previousPathname: "/issues",
+        pathname: "/dashboard",
+        navigationType: "POP",
+        state: SIDEBAR_SCROLL_RESET_STATE,
+      }),
+    ).toBe(false);
+  });
+
+  it("does not reset scroll on the initial render or when the pathname is unchanged", () => {
+    expect(
+      shouldResetScrollOnNavigation({
+        previousPathname: null,
+        pathname: "/dashboard",
+        navigationType: "PUSH",
+        state: SIDEBAR_SCROLL_RESET_STATE,
+      }),
+    ).toBe(false);
+
+    expect(
+      shouldResetScrollOnNavigation({
+        previousPathname: "/dashboard",
+        pathname: "/dashboard",
+        navigationType: "REPLACE",
+        state: SIDEBAR_SCROLL_RESET_STATE,
+      }),
+    ).toBe(false);
+  });
+
+  it("resets both the main content container and page scroll state", () => {
+    const main = document.createElement("main");
+    main.scrollTop = 180;
+    main.scrollLeft = 14;
+    main.scrollTo = vi.fn();
+    document.body.appendChild(main);
+
+    document.documentElement.scrollTop = 240;
+    document.documentElement.scrollLeft = 9;
+    document.body.scrollTop = 120;
+    document.body.scrollLeft = 7;
+    const windowScrollTo = vi.spyOn(window, "scrollTo").mockImplementation(() => {});
+
+    resetNavigationScroll(main);
+
+    expect(main.scrollTo).toHaveBeenCalledWith({ top: 0, left: 0, behavior: "auto" });
+    expect(main.scrollTop).toBe(0);
+    expect(main.scrollLeft).toBe(0);
+    expect(document.documentElement.scrollTop).toBe(0);
+    expect(document.documentElement.scrollLeft).toBe(0);
+    expect(document.body.scrollTop).toBe(0);
+    expect(document.body.scrollLeft).toBe(0);
+    expect(windowScrollTo).toHaveBeenCalledWith({ top: 0, left: 0, behavior: "auto" });
+  });
+});