fix(platform-serverless): add log when the operation isn't defined on…

… the given endpoint

packages/platform/platform-serverless/src/utils/setResponseHeaders.spec.ts

@@ -1,7 +1,7 @@
 import {PlatformTest} from "@tsed/common";
 import {Get, JsonEntityStore, Redirect, Returns} from "@tsed/schema";
-import {setResponseHeaders} from "./setResponseHeaders.js";
 import {createServerlessContext} from "../../test/utils/createServerlessContext.js";
+import {setResponseHeaders} from "./setResponseHeaders.js";
 
 describe("setResponseHeaders", () => {
   beforeEach(() => PlatformTest.create());
@@ -126,4 +126,30 @@ describe("setResponseHeaders", () => {
     // THEN
     return expect(ctx.response.isDone).toHaveBeenCalled();
   });
+  it("should do nothing if the endpoint isn't an operation", async () => {
+    class Test {
+      test() {}
+    }
+
+    const endpoint = JsonEntityStore.fromMethod(Test, "test");
+
+    const ctx = createServerlessContext({
+      endpoint: {}
+    });
+
+    jest.spyOn(ctx.response, "setHeaders");
+    jest.spyOn(ctx.response, "isDone");
+    jest.spyOn(ctx.logger, "debug");
+
+    // WHEN
+    await setResponseHeaders(ctx);
+
+    // THEN
+    expect(ctx.response.isDone).toHaveBeenCalled();
+    expect(ctx.logger.debug).toHaveBeenCalledWith({
+      event: "MISSING_OPERATION_METADATA",
+      message: "No operation found on the endpoint. The response headers are not set.",
+      endpoint: {}
+    });
+  });
 });

packages/platform/platform-serverless/src/utils/setResponseHeaders.ts

@@ -24,12 +24,21 @@ function mergeHeaders(specHeaders: Record<string, JsonHeader & {example: string}
  */
 export function setResponseHeaders(ctx: ServerlessContext) {
   const {response, endpoint} = ctx;
-  const operation = endpoint.operation!;
+  const operation = endpoint.operation;
 
   if (ctx.isDone()) {
     return;
   }
 
+  if (!operation) {
+    ctx.logger.debug({
+      event: "MISSING_OPERATION_METADATA",
+      message: "No operation found on the endpoint. The response headers are not set.",
+      endpoint: endpoint
+    });
+    return;
+  }
+
   if (!response.hasStatus()) {
     // apply status only if the isn't already modified
     response.status(operation.getStatus());