Add messaging & messaging-internal libraries (#15711)

libs/messaging-internal/src/helpers.spec.ts

@@ -0,0 +1,47 @@
+import { Subject, firstValueFrom } from "rxjs";
+
+import { CommandDefinition, isExternalMessage, Message } from "@bitwarden/messaging";
+
+import { getCommand, tagAsExternal } from "./helpers";
+
+describe("helpers", () => {
+  describe("getCommand", () => {
+    it("can get the command from just a string", () => {
+      const command = getCommand("myCommand");
+
+      expect(command).toEqual("myCommand");
+    });
+
+    it("can get the command from a message definition", () => {
+      const commandDefinition = new CommandDefinition<Record<string, unknown>>("myCommand");
+
+      const command = getCommand(commandDefinition);
+
+      expect(command).toEqual("myCommand");
+    });
+  });
+
+  describe("tag integration", () => {
+    it("can tag and identify as tagged", async () => {
+      const messagesSubject = new Subject<Message<Record<string, unknown>>>();
+
+      const taggedMessages = messagesSubject.asObservable().pipe(tagAsExternal());
+
+      const firstValuePromise = firstValueFrom(taggedMessages);
+
+      messagesSubject.next({ command: "test" });
+
+      const result = await firstValuePromise;
+
+      expect(isExternalMessage(result)).toEqual(true);
+    });
+  });
+
+  describe("isExternalMessage", () => {
+    it.each([null, { command: "myCommand", test: "object" }, undefined] as Message<
+      Record<string, unknown>
+    >[])("returns false when value is %s", (value: Message<Record<string, unknown>>) => {
+      expect(isExternalMessage(value)).toBe(false);
+    });
+  });
+});