fix(sendNoContent): preserve custom status code if already set

src/utils/response.ts

@@ -36,6 +36,11 @@ export function sendNoContent(event: H3Event, code?: number) {
   if (event.handled) {
     return;
   }
+
+  if (!code && event.node.res.statusCode !== 200) {
+    // status code was set with setResponseStatus
+    code = event.node.res.statusCode;
+  }
   const _code = sanitizeStatusCode(code, 204);
   // 204 responses MUST NOT have a Content-Length header field
   // https://www.rfc-editor.org/rfc/rfc7230#section-3.3.2

test/status.test.ts

@@ -0,0 +1,113 @@
+import { describe, it, expect, beforeEach } from "vitest";
+import {
+  createApp,
+  App,
+  toPlainHandler,
+  PlainHandler,
+  eventHandler,
+  setResponseStatus,
+} from "../src";
+
+describe("setResponseStatus", () => {
+  let app: App;
+  let handler: PlainHandler;
+
+  beforeEach(() => {
+    app = createApp({ debug: true });
+    handler = toPlainHandler(app);
+  });
+
+  describe("content response", () => {
+    it("sets status 200 as default", async () => {
+      app.use(
+        "/test",
+        eventHandler(() => {
+          return "text";
+        }),
+      );
+
+      const res = await handler({
+        method: "POST",
+        path: "/test",
+        headers: [],
+      });
+
+      expect(res).toMatchObject({
+        status: 200,
+        statusText: "",
+        body: "text",
+        headers: [["content-type", "text/html"]],
+      });
+    });
+    it("override status and statusText with setResponeStatus method", async () => {
+      app.use(
+        "/test",
+        eventHandler((event) => {
+          setResponseStatus(event, 418, "status-text");
+          return "text";
+        }),
+      );
+
+      const res = await handler({
+        method: "POST",
+        path: "/test",
+        headers: [],
+        body: "",
+      });
+
+      expect(res).toMatchObject({
+        status: 418,
+        statusText: "status-text",
+        body: "text",
+        headers: [["content-type", "text/html"]],
+      });
+    });
+  });
+
+  describe("no content response", () => {
+    it("sets status 204 as default", async () => {
+      app.use(
+        "/test",
+        eventHandler(() => {
+          return null;
+        }),
+      );
+
+      const res = await handler({
+        method: "POST",
+        path: "/test",
+        headers: [],
+      });
+
+      expect(res).toMatchObject({
+        status: 204,
+        statusText: "",
+        body: undefined,
+        headers: [],
+      });
+    });
+    it("override status and statusText with setResponeStatus method", async () => {
+      app.use(
+        "/test",
+        eventHandler((event) => {
+          setResponseStatus(event, 418, "status-text");
+          return null;
+        }),
+      );
+
+      const res = await handler({
+        method: "POST",
+        path: "/test",
+        headers: [],
+        body: "",
+      });
+
+      expect(res).toMatchObject({
+        status: 418,
+        statusText: "status-text",
+        body: undefined,
+        headers: [],
+      });
+    });
+  });
+});