add test cases for system resolvers

test/resolvers/SystemResolverTests.test.ts

@@ -0,0 +1,63 @@
+import { describe, it } from "@jest/globals";
+
+describe("SystemResolvers", () => {
+  describe("routes", () => {
+    it("gets routes associated with system id", async () => {
+
+    });
+  });
+
+  describe("stops", () => {
+    it("gets stops associated with system id", async () => {
+
+    });
+  });
+
+  describe("stop", () => {
+    it("gets the stop with the correct id", async () => {
+
+    });
+
+    it("returns null if the stop isn't associated with the system", async () => {
+
+    });
+
+    it("returns null if there is no stop", async () => {
+
+    });
+  });
+
+  describe("route", () => {
+    it("gets the route with the correct id", async () => {
+
+    });
+
+    it("returns null if the stop isn't associated with the system", async () => {
+
+    });
+
+    it("returns null if there is no route", async () => {
+
+    });
+  });
+
+  describe("shuttle", () => {
+    it("gets the shuttle with the correct id", async () => {
+
+    });
+
+    it("returns null if the stop isn't associated with the system", async () => {
+
+    });
+
+    it("returns null if there is no shuttle", async () => {
+
+    });
+  });
+
+  describe("shuttles", () => {
+    it("gets shuttles associated with system id", async () => {
+
+    });
+  });
+});