Add messaging & messaging-internal libraries (#15711)

libs/messaging-internal/src/subject-message.sender.spec.ts

@@ -0,0 +1,59 @@
+import { bufferCount, firstValueFrom, Subject } from "rxjs";
+
+import { CommandDefinition, Message } from "@bitwarden/messaging";
+
+import { SubjectMessageSender } from "./subject-message.sender";
+
+describe("SubjectMessageSender", () => {
+  const subject = new Subject<Message<{ test: number }>>();
+  const subjectObservable = subject.asObservable();
+
+  const sut = new SubjectMessageSender(subject);
+
+  describe("send", () => {
+    it("will send message with command from message definition", async () => {
+      const commandDefinition = new CommandDefinition<{ test: number }>("myCommand");
+
+      const emissionsPromise = firstValueFrom(subjectObservable.pipe(bufferCount(1)));
+
+      sut.send(commandDefinition, { test: 1 });
+
+      const emissions = await emissionsPromise;
+
+      expect(emissions[0]).toEqual({ command: "myCommand", test: 1 });
+    });
+
+    it("will send message with command from normal string", async () => {
+      const emissionsPromise = firstValueFrom(subjectObservable.pipe(bufferCount(1)));
+
+      sut.send("myCommand", { test: 1 });
+
+      const emissions = await emissionsPromise;
+
+      expect(emissions[0]).toEqual({ command: "myCommand", test: 1 });
+    });
+
+    it("will send message with object even if payload not given", async () => {
+      const emissionsPromise = firstValueFrom(subjectObservable.pipe(bufferCount(1)));
+
+      sut.send("myCommand");
+
+      const emissions = await emissionsPromise;
+
+      expect(emissions[0]).toEqual({ command: "myCommand" });
+    });
+
+    it.each([null, undefined])(
+      "will send message with object even if payload is null-ish (%s)",
+      async (payloadValue) => {
+        const emissionsPromise = firstValueFrom(subjectObservable.pipe(bufferCount(1)));
+
+        sut.send("myCommand", payloadValue);
+
+        const emissions = await emissionsPromise;
+
+        expect(emissions[0]).toEqual({ command: "myCommand" });
+      },
+    );
+  });
+});