actionhero/__tests__/core/chatRoom.ts

The reusable, scalable, and quick node.js API server for stateless and stateful applications

import {
  api,
  Process,
  config,
  utils,
  specHelper,
  chatRoom,
} from "./../../src/index";

const actionhero = new Process();

describe("Core", () => {
  describe("chatRoom", () => {
    beforeAll(async () => {
      await actionhero.start();

      for (var room in config.general.startingChatRooms) {
        try {
          await chatRoom.destroy(room);
          await chatRoom.add(room);
        } catch (error) {
          if (
            !error.toString().match(config.errors.connectionRoomExists(room))
          ) {
            throw error;
          }
        }
      }
    });

    afterAll(async () => {
      await actionhero.stop();
    });

    describe("say and clients on separate servers", () => {
      let client1;
      let client2;
      let client3;

      beforeAll(async () => {
        client1 = await specHelper.buildConnection();
        client2 = await specHelper.buildConnection();
        client3 = await specHelper.buildConnection();

        client1.verbs("roomAdd", "defaultRoom");
        client2.verbs("roomAdd", "defaultRoom");
        client3.verbs("roomAdd", "defaultRoom");
        await utils.sleep(100);
      });

      afterAll(async () => {
        client1.destroy();
        client2.destroy();
        client3.destroy();
        await utils.sleep(100);
      });

      test("all connections can join the default room and client #1 can see them", async () => {
        const { room, membersCount } = await client1.verbs(
          "roomView",
          "defaultRoom"
        );
        expect(room).toEqual("defaultRoom");
        expect(membersCount).toEqual(3);
      });

      test("all connections can join the default room and client #2 can see them", async () => {
        const { room, membersCount } = await client2.verbs(
          "roomView",
          "defaultRoom"
        );
        expect(room).toEqual("defaultRoom");
        expect(membersCount).toEqual(3);
      });

      test("all connections can join the default room and client #3 can see them", async () => {
        const { room, membersCount } = await client3.verbs(
          "roomView",
          "defaultRoom"
        );
        expect(room).toEqual("defaultRoom");
        expect(membersCount).toEqual(3);
      });

      test("clients can communicate across the cluster", async () => {
        await client1.verbs("say", [
          "defaultRoom",
          "Hi",
          "from",
          "client",
          "1",
        ]);
        await utils.sleep(100);

        const { message, room, from } =
          client2.messages[client2.messages.length - 1];
        expect(message).toEqual("Hi from client 1");
        expect(room).toEqual("defaultRoom");
        expect(from).toEqual(client1.id);
      });
    });

    describe("chat", () => {
      beforeEach(async () => {
        try {
          await chatRoom.destroy("newRoom");
        } catch (error) {
          // it's fine
        }
      });

      test("can check if rooms exist", async () => {
        const found = await chatRoom.exists("defaultRoom");
        expect(found).toEqual(true);
      });

      test("can check if a room does not exist", async () => {
        const found = await chatRoom.exists("missingRoom");
        expect(found).toEqual(false);
      });

      test("server can create new room", async () => {
        const room = "newRoom";
        let found;
        found = await chatRoom.exists(room);
        expect(found).toEqual(false);
        await chatRoom.add(room);
        found = await chatRoom.exists(room);
        expect(found).toEqual(true);
      });

      test("server cannot create already existing room", async () => {
        try {
          await chatRoom.add("defaultRoom");
          throw new Error("should not get here");
        } catch (error) {
          expect(error.toString()).toEqual("Error: room exists");
        }
      });

      test("can enumerate all the rooms in the system", async () => {
        await chatRoom.add("newRoom");
        const rooms = await chatRoom.list();
        expect(rooms).toHaveLength(3);
        ["defaultRoom", "newRoom", "otherRoom"].forEach((r) => {
          expect(rooms.indexOf(r)).toBeGreaterThan(-1);
        });
      });

      test("server can add connections to a LOCAL room", async () => {
        const client = await specHelper.buildConnection();
        expect(client.rooms).toHaveLength(0);
        const didAdd = await chatRoom.addMember(client.id, "defaultRoom");
        expect(didAdd).toEqual(true);
        expect(client.rooms[0]).toEqual("defaultRoom");
        client.destroy();
      });

      test("will not re-add a member to a room", async () => {
        const client = await specHelper.buildConnection();
        expect(client.rooms).toHaveLength(0);
        let didAdd = await chatRoom.addMember(client.id, "defaultRoom");
        expect(didAdd).toEqual(true);
        try {
          didAdd = await chatRoom.addMember(client.id, "defaultRoom");
          throw new Error("should not get here");
        } catch (error) {
          expect(error.toString()).toEqual(
            "Error: connection already in this room (defaultRoom)"
          );
          client.destroy();
        }
      });

      test("will not add a member to a non-existent room", async () => {
        const client = await specHelper.buildConnection();
        expect(client.rooms).toHaveLength(0);
        try {
          await chatRoom.addMember(client.id, "crazyRoom");
          throw new Error("should not get here");
        } catch (error) {
          expect(error.toString()).toEqual("Error: room does not exist");
          client.destroy();
        }
      });

      test("server will not remove a member not in a room", async () => {
        const client = await specHelper.buildConnection();
        try {
          await chatRoom.removeMember(client.id, "defaultRoom");
          throw new Error("should not get here");
        } catch (error) {
          expect(error.toString()).toEqual(
            "Error: connection not in this room (defaultRoom)"
          );
          client.destroy();
        }
      });

      test("server can remove connections to a room", async () => {
        const client = await specHelper.buildConnection();
        const didAdd = await chatRoom.addMember(client.id, "defaultRoom");
        expect(didAdd).toEqual(true);
        const didRemove = await chatRoom.removeMember(client.id, "defaultRoom");
        expect(didRemove).toEqual(true);
        client.destroy();
      });

      test("server can destroy a room and connections will be removed", async () => {
        try {
          // to ensure it starts empty
          await chatRoom.destroy("newRoom");
        } catch (error) {}

        const client = await specHelper.buildConnection();
        await chatRoom.add("newRoom");
        const didAdd = await chatRoom.addMember(client.id, "newRoom");
        expect(didAdd).toEqual(true);
        expect(client.rooms[0]).toEqual("newRoom");

        await chatRoom.destroy("newRoom");
        expect(client.rooms).toHaveLength(0);

        // testing for the receipt of this message is a race condition with room.destroy and broadcast in test
        // client.messages[1].message.should.equal('this room has been deleted')
        // client.messages[1].room.should.equal('newRoom')

        client.destroy();
      });

      test("can get a list of room members", async () => {
        const client = await specHelper.buildConnection();
        expect(client.rooms).toHaveLength(0);
        await chatRoom.add("newRoom");
        await chatRoom.addMember(client.id, "newRoom");
        const { room, membersCount } = await chatRoom.roomStatus("newRoom");
        expect(room).toEqual("newRoom");
        expect(membersCount).toEqual(1);
        client.destroy();
        await chatRoom.destroy("newRoom");
      });

      describe("chat middleware", () => {
        let clientA;
        let clientB;
        let originalGenerateMessagePayload;

        beforeEach(async () => {
          originalGenerateMessagePayload = api.chatRoom.generateMessagePayload;
          clientA = await specHelper.buildConnection();
          clientB = await specHelper.buildConnection();
        });

        afterEach(() => {
          api.chatRoom.middleware = {};
          api.chatRoom.globalMiddleware = [];

          clientA.destroy();
          clientB.destroy();

          api.chatRoom.generateMessagePayload = originalGenerateMessagePayload;
        });

        test("generateMessagePayload can be overloaded", async () => {
          api.chatRoom.generateMessagePayload = (message) => {
            return {
              thing: "stuff",
              room: message.connection.room,
              from: message.connection.id,
            };
          };

          await clientA.verbs("roomAdd", "defaultRoom");
          await clientB.verbs("roomAdd", "defaultRoom");
          await clientA.verbs("say", ["defaultRoom", "hi there"]);
          await utils.sleep(100);
          const message = clientB.messages[clientB.messages.length - 1];
          expect(message.thing).toEqual("stuff");
          expect(message.message).toBeUndefined();
        });

        test("(join + leave) can add middleware to announce members", async () => {
          chatRoom.addMiddleware({
            name: "add chat middleware",
            join: async (connection, room) => {
              await chatRoom.broadcast(
                {},
                room,
                `I have entered the room: ${connection.id}`
              );
            },
          });

          chatRoom.addMiddleware({
            name: "leave chat middleware",
            leave: async (connection, room) => {
              await chatRoom.broadcast(
                {},
                room,
                `I have left the room: ${connection.id}`
              );
            },
          });

          await clientA.verbs("roomAdd", "defaultRoom");
          await clientB.verbs("roomAdd", "defaultRoom");
          await clientB.verbs("roomLeave", "defaultRoom");
          await utils.sleep(100);

          expect(clientA.messages.pop().message).toEqual(
            "I have left the room: " + clientB.id
          );
          expect(clientA.messages.pop().message).toEqual(
            "I have entered the room: " + clientB.id
          );
        });

        test("(say) can modify message payloads", async () => {
          chatRoom.addMiddleware({
            name: "chat middleware",
            say: (connection, room, messagePayload) => {
              if (messagePayload.from !== 0) {
                messagePayload.message = "something else";
              }
              return messagePayload;
            },
          });

          await clientA.verbs("roomAdd", "defaultRoom");
          await clientB.verbs("roomAdd", "defaultRoom");
          await clientB.verbs("say", ["defaultRoom", "something", "awesome"]);
          await utils.sleep(100);

          const lastMessage = clientA.messages[clientA.messages.length - 1];
          expect(lastMessage.message).toEqual("something else");
        });

        test("can add middleware in a particular order and will be passed modified messagePayloads", async () => {
          chatRoom.addMiddleware({
            name: "chat middleware 1",
            priority: 1000,
            say: (connection, room, messagePayload, callback) => {
              messagePayload.message = "MIDDLEWARE 1";
              return messagePayload;
            },
          });

          chatRoom.addMiddleware({
            name: "chat middleware 2",
            priority: 2000,
            say: (connection, room, messagePayload) => {
              messagePayload.message = messagePayload.message + " MIDDLEWARE 2";
              return messagePayload;
            },
          });

          await clientA.verbs("roomAdd", "defaultRoom");
          await clientB.verbs("roomAdd", "defaultRoom");
          await clientB.verbs("say", ["defaultRoom", "something", "awesome"]);
          await utils.sleep(100);

          const lastMessage = clientA.messages[clientA.messages.length - 1];
          expect(lastMessage.message).toEqual("MIDDLEWARE 1 MIDDLEWARE 2");
        });

        test("say middleware can block execution", async () => {
          chatRoom.addMiddleware({
            name: "chat middleware",
            say: (connection, room, messagePayload) => {
              throw new Error("messages blocked");
            },
          });

          await clientA.verbs("roomAdd", "defaultRoom");
          await clientB.verbs("roomAdd", "defaultRoom");
          await clientB.verbs("say", ["defaultRoom", "something", "awesome"]);
          await utils.sleep(100);

          // welcome message is passed, no join/leave/or say messages
          expect(clientA.messages).toHaveLength(1);
          expect(clientA.messages[0].welcome).toMatch(/Welcome/);
        });

        test("join middleware can block execution", async () => {
          chatRoom.addMiddleware({
            name: "chat middleware",
            join: (connection, room) => {
              throw new Error("joining rooms blocked");
            },
          });

          try {
            await clientA.verbs("roomAdd", "defaultRoom");
            throw new Error("should not get here");
          } catch (error) {
            expect(error.toString()).toEqual("Error: joining rooms blocked");
            expect(clientA.rooms).toHaveLength(0);
          }
        });

        test("leave middleware can block execution", async () => {
          chatRoom.addMiddleware({
            name: "chat middleware",
            leave: (connection, room) => {
              throw new Error("Hotel California");
            },
          });

          const didJoin = await clientA.verbs("roomAdd", "defaultRoom");
          expect(didJoin).toEqual(true);
          expect(clientA.rooms).toHaveLength(1);
          expect(clientA.rooms[0]).toEqual("defaultRoom");

          try {
            await clientA.verbs("roomLeave", "defaultRoom");
            throw new Error("should not get here");
          } catch (error) {
            expect(error.toString()).toEqual("Error: Hotel California");
            expect(clientA.rooms).toHaveLength(1);
          }
        });

        test("(say verb with async keyword) can modify message payloads", async () => {
          chatRoom.addMiddleware({
            name: "chat middleware",
            say: async (connection, room, messagePayload) => {
              if (messagePayload.from !== 0) {
                messagePayload.message = "something else";
              }
              return messagePayload;
            },
          });
          await clientA.verbs("roomAdd", "defaultRoom");
          await clientB.verbs("roomAdd", "defaultRoom");
          await clientB.verbs("say", ["defaultRoom", "something", "awesome"]);
          await utils.sleep(100);
          const lastMessage = clientA.messages[clientA.messages.length - 1];
          expect(lastMessage.message).toEqual("something else");
        });

        test("can add middleware in a particular order and will be passed modified messagePayloads with both being async functions", async () => {
          chatRoom.addMiddleware({
            name: "chat middleware 1",
            priority: 1000,
            say: async (connection, room, messagePayload, callback) => {
              messagePayload.message = "MIDDLEWARE 1";
              return messagePayload;
            },
          });

          chatRoom.addMiddleware({
            name: "chat middleware 2",
            priority: 2000,
            say: async (connection, room, messagePayload) => {
              messagePayload.message = messagePayload.message + " MIDDLEWARE 2";
              return messagePayload;
            },
          });

          await clientA.verbs("roomAdd", "defaultRoom");
          await clientB.verbs("roomAdd", "defaultRoom");
          await clientB.verbs("say", ["defaultRoom", "something", "awesome"]);
          await utils.sleep(100);

          const lastMessage = clientA.messages[clientA.messages.length - 1];
          expect(lastMessage.message).toEqual("MIDDLEWARE 1 MIDDLEWARE 2");
        });

        test("say async function middleware can block execution", async () => {
          chatRoom.addMiddleware({
            name: "chat middleware",
            say: async (connection, room, messagePayload) => {
              throw new Error("messages blocked");
            },
          });

          await clientA.verbs("roomAdd", "defaultRoom");
          await clientB.verbs("roomAdd", "defaultRoom");
          await clientB.verbs("say", ["defaultRoom", "something", "awesome"]);
          await utils.sleep(100);

          // welcome message is passed, no join/leave/or say messages
          expect(clientA.messages).toHaveLength(1);
          expect(clientA.messages[0].welcome).toMatch(/Welcome/);
        });

        test("join async function middleware can block execution", async () => {
          chatRoom.addMiddleware({
            name: "chat middleware",
            join: async (connection, room) => {
              throw new Error("joining rooms blocked");
            },
          });

          try {
            await clientA.verbs("roomAdd", "defaultRoom");
            throw new Error("should not get here");
          } catch (error) {
            expect(error.toString()).toEqual("Error: joining rooms blocked");
            expect(clientA.rooms).toHaveLength(0);
          }
        });

        test("leave async function middleware can block execution", async () => {
          chatRoom.addMiddleware({
            name: "chat middleware",
            leave: async (connection, room) => {
              throw new Error("Hotel California");
            },
          });

          const didJoin = await clientA.verbs("roomAdd", "defaultRoom");
          expect(didJoin).toEqual(true);
          expect(clientA.rooms).toHaveLength(1);
          expect(clientA.rooms[0]).toEqual("defaultRoom");

          try {
            await clientA.verbs("roomLeave", "defaultRoom");
            throw new Error("should not get here");
          } catch (error) {
            expect(error.toString()).toEqual("Error: Hotel California");
            expect(clientA.rooms).toHaveLength(1);
          }
        });
      });
    });
  });
});