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package executor
import (
"context"
"net/http"
"net/http/httptest"
"strings"
"testing"
"github.com/modelcontextprotocol/go-sdk/mcp"
)
// recordingChannel is a fake AgentChannel that records tool invocations.
type recordingChannel struct {
asked string
summary string
spawned []SubtaskSpec
progress []string
spawnID string
}
func (c *recordingChannel) AskUser(_ context.Context, q string) (string, error) {
c.asked = q
return "", ErrAgentBlocked
}
func (c *recordingChannel) ReportSummary(_ context.Context, s string) error {
c.summary = s
return nil
}
func (c *recordingChannel) SpawnSubtask(_ context.Context, spec SubtaskSpec) (string, error) {
c.spawned = append(c.spawned, spec)
return c.spawnID, nil
}
func (c *recordingChannel) RecordProgress(_ context.Context, m string) error {
c.progress = append(c.progress, m)
return nil
}
func resultText(t *testing.T, res *mcp.CallToolResult) string {
t.Helper()
if len(res.Content) == 0 {
t.Fatal("expected content in tool result")
}
tc, ok := res.Content[0].(*mcp.TextContent)
if !ok {
t.Fatalf("expected TextContent, got %T", res.Content[0])
}
return tc.Text
}
func TestRegistry_MintLookupRevoke(t *testing.T) {
reg := NewRegistry()
tok, err := reg.Mint(&recordingChannel{})
if err != nil {
t.Fatalf("Mint: %v", err)
}
if tok == "" {
t.Fatal("expected non-empty token")
}
if _, ok := reg.server(tok); !ok {
t.Error("expected server for minted token")
}
if _, ok := reg.server("nonsense"); ok {
t.Error("expected no server for unknown token")
}
reg.Revoke(tok)
if _, ok := reg.server(tok); ok {
t.Error("expected no server after revoke")
}
}
func TestRegistry_MintUniqueTokens(t *testing.T) {
reg := NewRegistry()
a, _ := reg.Mint(&recordingChannel{})
b, _ := reg.Mint(&recordingChannel{})
if a == b {
t.Error("expected unique tokens per mint")
}
}
// connectInMemory wires a client to a server over the SDK's in-memory transport.
func connectInMemory(t *testing.T, srv *mcp.Server) *mcp.ClientSession {
t.Helper()
ctx := context.Background()
clientT, serverT := mcp.NewInMemoryTransports()
if _, err := srv.Connect(ctx, serverT, nil); err != nil {
t.Fatalf("server connect: %v", err)
}
client := mcp.NewClient(&mcp.Implementation{Name: "test", Version: "1"}, nil)
cs, err := client.Connect(ctx, clientT, nil)
if err != nil {
t.Fatalf("client connect: %v", err)
}
t.Cleanup(func() { _ = cs.Close() })
return cs
}
func TestAgentServer_AskUser_RecordsAndInstructsStop(t *testing.T) {
ch := &recordingChannel{}
cs := connectInMemory(t, newAgentServer(ch))
res, err := cs.CallTool(context.Background(), &mcp.CallToolParams{
Name: "ask_user",
Arguments: map[string]any{"question": "Proceed?", "options": []string{"yes", "no"}},
})
if err != nil {
t.Fatalf("CallTool: %v", err)
}
if !strings.Contains(ch.asked, `"text":"Proceed?"`) || !strings.Contains(ch.asked, "yes") {
t.Errorf("channel did not receive question+options: %q", ch.asked)
}
if txt := resultText(t, res); !strings.Contains(strings.ToLower(txt), "recorded") {
t.Errorf("expected stop instruction, got %q", txt)
}
}
func TestAgentServer_ReportSummary(t *testing.T) {
ch := &recordingChannel{}
cs := connectInMemory(t, newAgentServer(ch))
if _, err := cs.CallTool(context.Background(), &mcp.CallToolParams{
Name: "report_summary",
Arguments: map[string]any{"summary": "did the work"},
}); err != nil {
t.Fatalf("CallTool: %v", err)
}
if ch.summary != "did the work" {
t.Errorf("summary not recorded, got %q", ch.summary)
}
}
func TestAgentServer_SpawnSubtask(t *testing.T) {
ch := &recordingChannel{spawnID: "sub-1"}
cs := connectInMemory(t, newAgentServer(ch))
res, err := cs.CallTool(context.Background(), &mcp.CallToolParams{
Name: "spawn_subtask",
Arguments: map[string]any{"name": "child", "instructions": "do it", "model": "sonnet"},
})
if err != nil {
t.Fatalf("CallTool: %v", err)
}
if len(ch.spawned) != 1 || ch.spawned[0].Name != "child" || ch.spawned[0].Instructions != "do it" || ch.spawned[0].Model != "sonnet" {
t.Errorf("subtask spec not propagated: %+v", ch.spawned)
}
if txt := resultText(t, res); !strings.Contains(txt, "sub-1") {
t.Errorf("expected returned subtask ID in result, got %q", txt)
}
}
func TestAgentServer_RecordProgress(t *testing.T) {
ch := &recordingChannel{}
cs := connectInMemory(t, newAgentServer(ch))
if _, err := cs.CallTool(context.Background(), &mcp.CallToolParams{
Name: "record_progress",
Arguments: map[string]any{"message": "halfway"},
}); err != nil {
t.Fatalf("CallTool: %v", err)
}
if len(ch.progress) != 1 || ch.progress[0] != "halfway" {
t.Errorf("progress not recorded: %+v", ch.progress)
}
}
type bearerRT struct {
token string
base http.RoundTripper
}
func (b bearerRT) RoundTrip(r *http.Request) (*http.Response, error) {
r = r.Clone(r.Context())
if b.token != "" {
r.Header.Set("Authorization", "Bearer "+b.token)
}
return b.base.RoundTrip(r)
}
func TestAgentMCPHandler_HTTP_AuthAndDispatch(t *testing.T) {
ch := &recordingChannel{}
reg := NewRegistry()
tok, _ := reg.Mint(ch)
httpSrv := httptest.NewServer(NewAgentMCPHandler(reg))
defer httpSrv.Close()
ctx := context.Background()
client := mcp.NewClient(&mcp.Implementation{Name: "test", Version: "1"}, nil)
cs, err := client.Connect(ctx, &mcp.StreamableClientTransport{
Endpoint: httpSrv.URL,
HTTPClient: &http.Client{Transport: bearerRT{token: tok, base: http.DefaultTransport}},
}, nil)
if err != nil {
t.Fatalf("client connect with valid token: %v", err)
}
defer cs.Close()
if _, err := cs.CallTool(ctx, &mcp.CallToolParams{
Name: "record_progress",
Arguments: map[string]any{"message": "over http"},
}); err != nil {
t.Fatalf("CallTool over HTTP: %v", err)
}
if len(ch.progress) != 1 || ch.progress[0] != "over http" {
t.Errorf("HTTP dispatch did not reach channel: %+v", ch.progress)
}
}
func TestAgentMCPHandler_HTTP_BadTokenRejected(t *testing.T) {
reg := NewRegistry()
httpSrv := httptest.NewServer(NewAgentMCPHandler(reg))
defer httpSrv.Close()
client := mcp.NewClient(&mcp.Implementation{Name: "test", Version: "1"}, nil)
_, err := client.Connect(context.Background(), &mcp.StreamableClientTransport{
Endpoint: httpSrv.URL,
HTTPClient: &http.Client{Transport: bearerRT{token: "invalid", base: http.DefaultTransport}},
}, nil)
if err == nil {
t.Fatal("expected connect to fail with invalid token")
}
}
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