add test for not showing shield

test/unit-tests/components/views/rooms/EventTile-test.tsx

@@ -19,7 +19,14 @@ import {
     Room,
     TweakName,
 } from "matrix-js-sdk/src/matrix";
-import { CryptoApi, EventEncryptionInfo, EventShieldColour, EventShieldReason } from "matrix-js-sdk/src/crypto-api";
+import {
+    CryptoApi,
+    DecryptionFailureCode,
+    EventEncryptionInfo,
+    EventShieldColour,
+    EventShieldReason,
+} from "matrix-js-sdk/src/crypto-api";
+import { DecryptionError } from "matrix-js-sdk/src/crypto/algorithms";
 import { mkEncryptedMatrixEvent } from "matrix-js-sdk/src/testing";
 
 import EventTile, { EventTileProps } from "../../../../../src/components/views/rooms/EventTile";
@@ -350,6 +357,34 @@ describe("EventTile", () => {
                     "mx_EventTile_e2eIcon_decryption_failure",
                 );
             });
+
+            it("should not show a shield for previously-verified users", async () => {
+                mxEvent = mkEvent({
+                    type: "m.room.encrypted",
+                    room: room.roomId,
+                    user: "@alice:example.org",
+                    event: true,
+                    content: {},
+                });
+
+                const mockCrypto = {
+                    decryptEvent: async (_ev): Promise<IEventDecryptionResult> => {
+                        throw new DecryptionError(
+                            DecryptionFailureCode.SENDER_IDENTITY_PREVIOUSLY_VERIFIED,
+                            "The sender identity is unverified, but was previously verified.",
+                        );
+                    },
+                } as Parameters<MatrixEvent["attemptDecryption"]>[0];
+                await mxEvent.attemptDecryption(mockCrypto);
+
+                const { container } = getComponent();
+                await act(flushPromises);
+
+                const eventTiles = container.getElementsByClassName("mx_EventTile");
+                expect(eventTiles).toHaveLength(1);
+
+                expect(container.getElementsByClassName("mx_EventTile_e2eIcon")).toHaveLength(0);
+            });
         });
 
         it("should update the warning when the event is edited", async () => {