feat: introduce dioc into hoppscotch-common

packages/dioc/test/service.spec.ts

@@ -0,0 +1,66 @@
+import { describe, expect, it, vi } from "vitest"
+import { Service, Container } from "../lib/main"
+
+class TestServiceA extends Service {
+  public static ID = "TestServiceA"
+}
+
+class TestServiceB extends Service<"test"> {
+  public static ID = "TestServiceB"
+
+  // Marked public to allow for testing
+  public readonly serviceA = this.bind(TestServiceA)
+
+  public emitTestEvent() {
+    this.emit("test")
+  }
+}
+
+describe("Service", () => {
+  describe("constructor", () => {
+    it("throws an error if the service is initialized without a container", () => {
+      expect(() => new TestServiceA()).toThrowError(
+        "Tried to initialize service with no container (ID: TestServiceA)"
+      )
+    })
+  })
+
+  describe("bind", () => {
+    it("correctly binds the dependency service using the container", () => {
+      const container = new Container()
+
+      const serviceA = container.bind(TestServiceA)
+
+      const serviceB = container.bind(TestServiceB)
+      expect(serviceB.serviceA).toBe(serviceA)
+    })
+  })
+
+  describe("getContainer", () => {
+    it("returns the container the service is bound to", () => {
+      const container = new Container()
+
+      const serviceA = container.bind(TestServiceA)
+
+      // @ts-expect-error getContainer is a protected member, we are just using it to help with testing
+      expect(serviceA.getContainer()).toBe(container)
+    })
+  })
+
+  describe("getEventStream", () => {
+    it("returns the valid event stream of the service", () => {
+      const container = new Container()
+
+      const serviceB = container.bind(TestServiceB)
+
+      const serviceFunc = vi.fn()
+
+      serviceB.getEventStream().subscribe(serviceFunc)
+
+      serviceB.emitTestEvent()
+
+      expect(serviceFunc).toHaveBeenCalledOnce()
+      expect(serviceFunc).toHaveBeenCalledWith("test")
+    })
+  })
+})