Add test for textForPinnedEvent

Signed-off-by: Paulo Pinto <paulo.pinto@automattic.com>

test/TextForEvent-test.ts

@@ -0,0 +1,43 @@
+import './skinned-sdk';
+
+import { textForEvent } from "../src/TextForEvent";
+import { MatrixEvent } from "matrix-js-sdk";
+import SettingsStore from "../src/settings/SettingsStore";
+import { SettingLevel } from "../src/settings/SettingLevel";
+import renderer from 'react-test-renderer';
+
+function mockPinnedEvent(
+    pinnedMessageIds?: string[],
+    prevPinnedMessageIds?: string[],
+): MatrixEvent {
+    return new MatrixEvent({
+        type: "m.room.pinned_events",
+        state_key: "",
+        sender: "@foo:example.com",
+        content: {
+            pinned: pinnedMessageIds,
+        },
+        prev_content: {
+            pinned: prevPinnedMessageIds,
+        },
+    });
+}
+
+describe("TextForPinnedEvent", () => {
+    SettingsStore.setValue("feature_pinning", null, SettingLevel.DEVICE, true);
+
+    it("should mention sender", () => {
+        const event = mockPinnedEvent();
+        expect(textForEvent(event)).toBe("@foo:example.com changed the pinned messages for the room.");
+    });
+});
+
+describe("TextForPinnedEvent (JSX)", () => {
+    SettingsStore.setValue("feature_pinning", null, SettingLevel.DEVICE, true);
+
+    it("should mention sender", () => {
+        const event = mockPinnedEvent();
+        const component = renderer.create(textForEvent(event, true));
+        expect(component.toJSON()).toMatchSnapshot();
+    });
+});