add queries for ordered stop resolver tests

test/resolvers/OrderedStopResolverTests.test.ts

@@ -14,19 +14,73 @@ describe("OrderedStopResolvers", () => {
   });
 
   describe("nextStop", () => {
-
+    const query = `
+    query GetNextStop($systemId: ID!, $routeId: ID!, $stopId: ID!) {
+      system(id: $systemId) {
+        route(id: $routeId) {
+          orderedStop(forStopId: $stopId) {
+            nextStop {
+              routeId
+              stopId
+            }
+          }
+        }
+      }
+    }
+    `;
   });
 
   describe("previousStop", () => {
-
+    const query = `
+    query GetNextStop($systemId: ID!, $routeId: ID!, $stopId: ID!) {
+      system(id: $systemId) {
+        route(id: $routeId) {
+          orderedStop(forStopId: $stopId) {
+            previousStop {
+              routeId
+              stopId
+            }
+          }
+        }
+      }
+    }
+    `;
   });
 
   describe("route", () => {
-
+    // Note that there is no `orderedStop(forRouteId)` resolver,
+    // so fetch all ordered stops for a stop instead
+    const query = `
+    query GetNextStop($systemId: ID!, $stopId: ID!) {
+      system(id: $systemId) {
+        stop(id: $stopId) {
+          orderedStops {
+            route {
+              id
+              name
+            }
+          }
+        }
+      }
+    }
+    `;
   });
 
   describe("stop", () => {
-
+    const query = `
+    query GetNextStop($systemId: ID!, $routeId: ID!, $stopId: ID!) {
+      system(id: $systemId) {
+        route(id: $routeId) {
+          orderedStop(forStopId: $stopId) {
+            stop {
+              name
+              id
+            }
+          }
+        }
+      }
+    }
+    `;
   });
 });