Add Update button dropdown tests

Signed-off-by: Alex Andreev <alex.andreev.email@gmail.com>

src/behaviours/application-update/installing-update-using-topbar-button.test.tsx

@@ -1,6 +1,6 @@
 import type { AsyncFnMock } from "@async-fn/jest";
 import asyncFn from "@async-fn/jest";
-import type { RenderResult } from "@testing-library/react";
+import { act, RenderResult } from "@testing-library/react";
 import type { CheckForPlatformUpdates } from "../../main/application-update/check-for-platform-updates/check-for-platform-updates.injectable";
 import checkForPlatformUpdatesInjectable from "../../main/application-update/check-for-platform-updates/check-for-platform-updates.injectable";
 import type { DownloadPlatformUpdate } from "../../main/application-update/download-platform-update/download-platform-update.injectable";
@@ -16,11 +16,17 @@ import openAppContextMenuInjectable from "../../renderer/components/layout/top-b
 import toggleMaximizeWindowInjectable from "../../renderer/components/layout/top-bar/toggle-maximize-window.injectable";
 import type { ApplicationBuilder } from "../../renderer/components/test-utils/get-application-builder";
 import { getApplicationBuilder } from "../../renderer/components/test-utils/get-application-builder";
+import restartAndInstallUpdateInjectable from "../../renderer/components/update-button/restart-and-install-update.injectable";
+
+function daysToMilliseconds(days: number) {
+  return Math.round(days * 24 * 60 * 60 * 1000);
+}
 
 describe("encourage user to update when sufficient time passed since update was downloaded", () => {
   let applicationBuilder: ApplicationBuilder;
   let checkForPlatformUpdatesMock: AsyncFnMock<CheckForPlatformUpdates>;
   let downloadPlatformUpdateMock: AsyncFnMock<DownloadPlatformUpdate>;
+  let restartAndInstallUpdate: jest.MockedFunction<() => void>;
 
   beforeEach(() => {
     applicationBuilder = getApplicationBuilder();
@@ -45,6 +51,8 @@ describe("encourage user to update when sufficient time passed since update was
       mainDi.unoverride(periodicalCheckForUpdateWarningInjectable);
       mainDi.permitSideEffects(periodicalCheckForUpdateWarningInjectable);
 
+      rendererDi.override(restartAndInstallUpdateInjectable, () => restartAndInstallUpdate = jest.fn());
+
       // TODO: Remove below lines when TopBar are free from side-effects
       rendererDi.unoverride(openAppContextMenuInjectable);
       rendererDi.unoverride(goBackInjectable);
@@ -102,6 +110,63 @@ describe("encourage user to update when sufficient time passed since update was
   
           expect(button).toBeInTheDocument();
         })
+
+        it("has soft emotional indication in the button", () => {
+          const button = rendered.getByTestId("update-button");
+
+          expect(button).toHaveAttribute("data-warning-level", "light")
+        })
+
+        describe("when button is clicked", () => {
+          it("shows dropdown with update item", () => {
+            const button = rendered.queryByTestId("update-button");
+
+            act(() => button?.click());
+
+            expect(rendered.getByTestId("update-lens-menu-item")).toBeInTheDocument();
+          })
+
+          it("when selected update now, restarts the application to update", () => {
+            const button = rendered.queryByTestId("update-button");
+
+            act(() => button?.click());
+
+            const updateMenuItem = rendered.getByTestId("update-lens-menu-item");
+
+            act(() => updateMenuItem?.click());
+
+            expect(restartAndInstallUpdate).toBeCalled();
+          })
+
+          describe("when dropdown closed without clicking update item", () => {
+            it("does not restart the application to update", async () => {
+              const button = rendered.queryByTestId("update-button");
+
+              act(() => button?.click());
+              
+              act(() => button?.click());
+
+              expect(restartAndInstallUpdate).not.toBeCalled();
+            })
+          })
+        })
+
+        describe("given just enough time passes for medium update encouragement", () => {
+          beforeAll(() => {
+            jest.useFakeTimers();
+            jest.advanceTimersByTime(daysToMilliseconds(22));
+          })
+
+          it("has medium emotional indication in the button", () => {
+            const button = rendered.getByTestId("update-button");
+
+            expect(button).toHaveAttribute("data-warning-level", "medium")
+          })
+
+          afterAll(() => {
+            jest.useRealTimers();
+          })
+        })
       });
     });
   });