add test cases for endpoints

test/resolvers/SystemResolverTests.test.ts

@@ -308,4 +308,28 @@ describe("SystemResolvers", () => {
       expect(shuttles.length === expectedShuttles.length);
     });
   });
+
+  describe("parkingStructures", () => {
+    it("gets parking structures associated with the system id", async () => {
+
+    });
+
+    it("returns a blank array if there are no parking structures", async () => {
+
+    });
+
+    it("returns null if there is no parking data available", async () => {
+
+    });
+  });
+
+  describe("parkingStructure", () => {
+    it("returns the correct parking structure given the id", async () => {
+
+    });
+
+    it("returns null if there is no matching parking structure", async () => {
+
+    });
+  });
 });