test(sessions): add tests for sessions_send label lookup

- Test finding session by label
- Test error when label not found
- Test error when neither sessionKey nor label provided

src/gateway/server.sessions-send.test.ts

@@ -101,3 +101,147 @@ describe("sessions_send gateway loopback", () => {
     }
   });
 });
+
+describe("sessions_send label lookup", () => {
+  it("finds session by label and sends message", async () => {
+    const port = await getFreePort();
+    const prevPort = process.env.CLAWDBOT_GATEWAY_PORT;
+    process.env.CLAWDBOT_GATEWAY_PORT = String(port);
+
+    const server = await startGatewayServer(port);
+    const spy = vi.mocked(agentCommand);
+    spy.mockImplementation(async (opts) => {
+      const params = opts as {
+        sessionId?: string;
+        runId?: string;
+        extraSystemPrompt?: string;
+      };
+      const sessionId = params.sessionId ?? "test-labeled";
+      const runId = params.runId ?? sessionId;
+      const sessionFile = resolveSessionTranscriptPath(sessionId);
+      await fs.mkdir(path.dirname(sessionFile), { recursive: true });
+
+      const startedAt = Date.now();
+      emitAgentEvent({
+        runId,
+        stream: "lifecycle",
+        data: { phase: "start", startedAt },
+      });
+
+      const text = "labeled response";
+      const message = {
+        role: "assistant",
+        content: [{ type: "text", text }],
+      };
+      await fs.appendFile(
+        sessionFile,
+        `${JSON.stringify({ message })}\n`,
+        "utf8",
+      );
+
+      emitAgentEvent({
+        runId,
+        stream: "lifecycle",
+        data: { phase: "end", startedAt, endedAt: Date.now() },
+      });
+    });
+
+    try {
+      // First, create a session with a label via sessions.patch
+      const { callGateway } = await import("./call.js");
+      await callGateway({
+        method: "sessions.patch",
+        params: { key: "test-labeled-session", label: "my-test-worker" },
+        timeoutMs: 5000,
+      });
+
+      const tool = createClawdbotTools().find(
+        (candidate) => candidate.name === "sessions_send",
+      );
+      if (!tool) throw new Error("missing sessions_send tool");
+
+      // Send using label instead of sessionKey
+      const result = await tool.execute("call-by-label", {
+        label: "my-test-worker",
+        message: "hello labeled session",
+        timeoutSeconds: 5,
+      });
+      const details = result.details as {
+        status?: string;
+        reply?: string;
+        sessionKey?: string;
+      };
+      expect(details.status).toBe("ok");
+      expect(details.reply).toBe("labeled response");
+      expect(details.sessionKey).toBe("test-labeled-session");
+    } finally {
+      if (prevPort === undefined) {
+        delete process.env.CLAWDBOT_GATEWAY_PORT;
+      } else {
+        process.env.CLAWDBOT_GATEWAY_PORT = prevPort;
+      }
+      await server.close();
+    }
+  });
+
+  it("returns error when label not found", async () => {
+    const port = await getFreePort();
+    const prevPort = process.env.CLAWDBOT_GATEWAY_PORT;
+    process.env.CLAWDBOT_GATEWAY_PORT = String(port);
+
+    const server = await startGatewayServer(port);
+
+    try {
+      const tool = createClawdbotTools().find(
+        (candidate) => candidate.name === "sessions_send",
+      );
+      if (!tool) throw new Error("missing sessions_send tool");
+
+      const result = await tool.execute("call-missing-label", {
+        label: "nonexistent-label",
+        message: "hello",
+        timeoutSeconds: 5,
+      });
+      const details = result.details as { status?: string; error?: string };
+      expect(details.status).toBe("error");
+      expect(details.error).toContain("No session found with label");
+    } finally {
+      if (prevPort === undefined) {
+        delete process.env.CLAWDBOT_GATEWAY_PORT;
+      } else {
+        process.env.CLAWDBOT_GATEWAY_PORT = prevPort;
+      }
+      await server.close();
+    }
+  });
+
+  it("returns error when neither sessionKey nor label provided", async () => {
+    const port = await getFreePort();
+    const prevPort = process.env.CLAWDBOT_GATEWAY_PORT;
+    process.env.CLAWDBOT_GATEWAY_PORT = String(port);
+
+    const server = await startGatewayServer(port);
+
+    try {
+      const tool = createClawdbotTools().find(
+        (candidate) => candidate.name === "sessions_send",
+      );
+      if (!tool) throw new Error("missing sessions_send tool");
+
+      const result = await tool.execute("call-no-key", {
+        message: "hello",
+        timeoutSeconds: 5,
+      });
+      const details = result.details as { status?: string; error?: string };
+      expect(details.status).toBe("error");
+      expect(details.error).toContain("Either sessionKey or label is required");
+    } finally {
+      if (prevPort === undefined) {
+        delete process.env.CLAWDBOT_GATEWAY_PORT;
+      } else {
+        process.env.CLAWDBOT_GATEWAY_PORT = prevPort;
+      }
+      await server.close();
+    }
+  });
+});