✅ Add tests for cmd/activity

MODULE.bazel

@@ -25,6 +25,7 @@ use_repo(
     "com_github_spf13_cobra",
     "com_github_spf13_pflag",
     "com_github_spf13_viper",
+    "com_github_stretchr_testify",
     "in_gopkg_yaml_v3",
     "org_golang_google_adk",
     "org_golang_google_api",

cmd/activity/BUILD.bazel

@@ -1,4 +1,4 @@
-load("@rules_go//go:def.bzl", "go_library")
+load("@rules_go//go:def.bzl", "go_library", "go_test")
 
 go_library(
     name = "activity",
@@ -18,3 +18,15 @@ go_library(
         "@com_github_spf13_cobra//:cobra",
     ],
 )
+
+go_test(
+    name = "activity_test",
+    srcs = ["list_test.go"],
+    embed = [":activity"],
+    deps = [
+        "//pkg/activity",
+        "@com_github_stretchr_testify//assert",
+        "@org_golang_google_api//option",
+        "@org_golang_google_api//youtube/v3:youtube",
+    ],
+)

cmd/activity/list.go

@@ -155,8 +155,8 @@ func listHandler(
 	return &mcp.CallToolResult{Content: []mcp.Content{&mcp.TextContent{Text: writer.String()}}}, nil, nil
 }
 
-func list(writer io.Writer) error {
-	a := activity.NewActivity(
+func list(writer io.Writer, opts ...activity.Option) error {
+	defaultOpts := []activity.Option{
 		activity.WithChannelId(channelId),
 		activity.WithHome(home),
 		activity.WithMaxResults(maxResults),
@@ -165,7 +165,8 @@ func list(writer io.Writer) error {
 		activity.WithPublishedBefore(publishedBefore),
 		activity.WithRegionCode(regionCode),
 		activity.WithService(nil),
-	)
+	}
+	a := activity.NewActivity(append(defaultOpts, opts...)...)
 
 	return a.List(parts, output, jpath, writer)
 }

cmd/activity/list_test.go

@@ -0,0 +1,57 @@
+// Copyright 2026 eat-pray-ai & OpenWaygate
+// SPDX-License-Identifier: Apache-2.0
+
+package activity
+
+import (
+	"bytes"
+	"context"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/eat-pray-ai/yutu/pkg/activity"
+	"github.com/stretchr/testify/assert"
+	"google.golang.org/api/option"
+	"google.golang.org/api/youtube/v3"
+)
+
+func TestList(t *testing.T) {
+	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		w.Write([]byte(`{
+			"items": [
+				{
+					"id": "test-activity-id",
+					"snippet": {
+						"title": "Test Activity",
+						"type": "upload",
+						"publishedAt": "2024-01-01T00:00:00Z"
+					},
+					"contentDetails": {
+						"upload": {
+							"videoId": "test-video-id"
+						}
+					}
+				}
+			],
+			"nextPageToken": ""
+		}`))
+	}))
+	defer ts.Close()
+
+	svc, err := youtube.NewService(context.Background(), option.WithEndpoint(ts.URL), option.WithAPIKey("test-key"))
+	if err != nil {
+		t.Fatalf("failed to create service: %v", err)
+	}
+
+	var buf bytes.Buffer
+
+	err = list(&buf, activity.WithService(svc))
+
+	assert.NoError(t, err)
+	output := buf.String()
+	assert.Contains(t, output, "test-activity-id")
+	assert.Contains(t, output, "Test Activity")
+	assert.Contains(t, output, "upload")
+}

go.mod

@@ -7,6 +7,7 @@ require (
 	github.com/savioxavier/termlink v1.4.3
 	github.com/spf13/cobra v1.10.2
 	github.com/spf13/viper v1.21.0
+	github.com/stretchr/testify v1.11.1
 	golang.org/x/oauth2 v0.34.0
 )
 
@@ -20,6 +21,7 @@ require (
 	github.com/clipperhouse/stringish v0.1.1 // indirect
 	github.com/clipperhouse/uax29/v2 v2.3.0 // indirect
 	github.com/cpuguy83/go-md2man/v2 v2.0.7 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/felixge/httpsnoop v1.0.4 // indirect
 	github.com/go-logr/logr v1.4.3 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
@@ -34,6 +36,7 @@ require (
 	github.com/gorilla/websocket v1.5.3 // indirect
 	github.com/mattn/go-runewidth v0.0.19 // indirect
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
 	github.com/yosida95/uritemplate/v3 v3.0.2 // indirect
 	go.opentelemetry.io/auto/sdk v1.2.1 // indirect

pkg/activity/activity.go

@@ -44,6 +44,13 @@ func NewActivity(opts ...Option) Activity[youtube.Activity] {
 		opt(a)
 	}
 
+	if service == nil {
+		service = auth.NewY2BService(
+			auth.WithCredential("", pkg.Root.FS()),
+			auth.WithCacheToken("", pkg.Root.FS()),
+		).GetService()
+	}
+
 	return a
 }
 
@@ -181,12 +188,6 @@ func WithRegionCode(regionCode string) Option {
 
 func WithService(svc *youtube.Service) Option {
 	return func(_ *activity) {
-		if svc == nil {
-			svc = auth.NewY2BService(
-				auth.WithCredential("", pkg.Root.FS()),
-				auth.WithCacheToken("", pkg.Root.FS()),
-			).GetService()
-		}
 		service = svc
 	}
 }