test(#291): add test for connection limit per workspace

Add test to verify workspace connection limit enforcement.
Default limit is 100 connections per workspace.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

apps/api/src/federation/connection.service.spec.ts

@@ -88,6 +88,7 @@ describe("ConnectionService", () => {
               findMany: vi.fn(),
               update: vi.fn(),
               delete: vi.fn(),
+              count: vi.fn(),
             },
           },
         },
@@ -136,6 +137,19 @@ describe("ConnectionService", () => {
   });
 
   describe("initiateConnection", () => {
+    it("should throw error if workspace has reached connection limit", async () => {
+      const existingConnections = Array.from({ length: 100 }, (_, i) => ({
+        ...mockConnection,
+        id: `conn-${i}`,
+      }));
+
+      vi.spyOn(prismaService.federationConnection, "count").mockResolvedValue(100);
+
+      await expect(service.initiateConnection(mockWorkspaceId, mockRemoteUrl)).rejects.toThrow(
+        "Connection limit reached for workspace. Maximum 100 connections allowed per workspace."
+      );
+    });
+
     it("should create a pending connection", async () => {
       const mockAxiosResponse: AxiosResponse = {
         data: mockRemoteIdentity,
@@ -145,6 +159,7 @@ describe("ConnectionService", () => {
         config: {} as never,
       };
 
+      vi.spyOn(prismaService.federationConnection, "count").mockResolvedValue(5);
       vi.spyOn(httpService, "get").mockReturnValue(of(mockAxiosResponse));
       vi.spyOn(httpService, "post").mockReturnValue(
         of({ data: { accepted: true } } as AxiosResponse)
@@ -176,6 +191,7 @@ describe("ConnectionService", () => {
         config: {} as never,
       };
 
+      vi.spyOn(prismaService.federationConnection, "count").mockResolvedValue(5);
       vi.spyOn(httpService, "get").mockReturnValue(of(mockAxiosResponse));
       vi.spyOn(httpService, "post").mockReturnValue(
         of({ data: { accepted: true } } as AxiosResponse)
@@ -202,6 +218,7 @@ describe("ConnectionService", () => {
         config: {} as never,
       };
 
+      vi.spyOn(prismaService.federationConnection, "count").mockResolvedValue(5);
       const postSpy = vi
         .spyOn(httpService, "post")
         .mockReturnValue(of({ data: { accepted: true } } as AxiosResponse));
@@ -230,6 +247,7 @@ describe("ConnectionService", () => {
         config: {} as never,
       };
 
+      vi.spyOn(prismaService.federationConnection, "count").mockResolvedValue(5);
       vi.spyOn(httpService, "get").mockReturnValue(of(mockAxiosResponse));
       vi.spyOn(httpService, "post").mockReturnValue(
         throwError(() => new Error("Connection refused"))

apps/api/src/federation/connection.service.ts

@@ -25,6 +25,7 @@ import type { PublicInstanceIdentity } from "./types/instance.types";
 @Injectable()
 export class ConnectionService {
   private readonly logger = new Logger(ConnectionService.name);
+  private readonly MAX_CONNECTIONS_PER_WORKSPACE = 100;
 
   constructor(
     private readonly prisma: PrismaService,
@@ -40,6 +41,17 @@ export class ConnectionService {
   async initiateConnection(workspaceId: string, remoteUrl: string): Promise<ConnectionDetails> {
     this.logger.log(`Initiating connection to ${remoteUrl} for workspace ${workspaceId}`);
 
+    // Check connection limit for workspace
+    const connectionCount = await this.prisma.federationConnection.count({
+      where: { workspaceId },
+    });
+
+    if (connectionCount >= this.MAX_CONNECTIONS_PER_WORKSPACE) {
+      throw new BadRequestException(
+        `Connection limit reached for workspace. Maximum ${String(this.MAX_CONNECTIONS_PER_WORKSPACE)} connections allowed per workspace.`
+      );
+    }
+
     // Fetch remote instance identity
     const remoteIdentity = await this.fetchRemoteIdentity(remoteUrl);