Display "The sender has blocked you from receiving this message" error message instead of "Unable to decrypt message" (#10202)

test/components/views/messages/DecryptionFailureBody-test.tsx

@@ -0,0 +1,63 @@
+/*
+ * Copyright 2023 The Matrix.org Foundation C.I.C.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import React from "react";
+import { render } from "@testing-library/react";
+import { MatrixEvent } from "matrix-js-sdk/src/matrix";
+
+import { mkEvent } from "../../../test-utils";
+import { DecryptionFailureBody } from "../../../../src/components/views/messages/DecryptionFailureBody";
+
+describe("DecryptionFailureBody", () => {
+    function customRender(event: MatrixEvent) {
+        return render(<DecryptionFailureBody mxEvent={event} />);
+    }
+
+    it(`Should display "Unable to decrypt message"`, () => {
+        // When
+        const event = mkEvent({
+            type: "m.room.message",
+            room: "myfakeroom",
+            user: "myfakeuser",
+            content: {
+                msgtype: "m.bad.encrypted",
+            },
+            event: true,
+        });
+        const { container } = customRender(event);
+
+        // Then
+        expect(container).toMatchSnapshot();
+    });
+
+    it(`Should display "The sender has blocked you from receiving this message"`, () => {
+        // When
+        const event = mkEvent({
+            type: "m.room.message",
+            room: "myfakeroom",
+            user: "myfakeuser",
+            content: {
+                msgtype: "m.bad.encrypted",
+            },
+            event: true,
+        });
+        jest.spyOn(event, "isEncryptedDisabledForUnverifiedDevices", "get").mockReturnValue(true);
+        const { container } = customRender(event);
+
+        // Then
+        expect(container).toMatchSnapshot();
+    });
+});

test/components/views/messages/__snapshots__/DecryptionFailureBody-test.tsx.snap

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+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`DecryptionFailureBody Should display "The sender has blocked you from receiving this message" 1`] = `
+<div>
+  <div
+    class="mx_DecryptionFailureBody mx_EventTile_content"
+  >
+    The sender has blocked you from receiving this message
+  </div>
+</div>
+`;
+
+exports[`DecryptionFailureBody Should display "Unable to decrypt message" 1`] = `
+<div>
+  <div
+    class="mx_DecryptionFailureBody mx_EventTile_content"
+  >
+    Unable to decrypt message
+  </div>
+</div>
+`;