chore: import upstream snapshot with attribution

server/router/api/v1/test/instance_admin_cache_test.go

@@ -0,0 +1,54 @@
+package test
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	v1pb "github.com/usememos/memos/proto/gen/api/v1"
+)
+
+func TestInstanceAdminRetrieval(t *testing.T) {
+	ctx := context.Background()
+
+	t.Run("Instance becomes initialized after first admin user is created", func(t *testing.T) {
+		// Create test service
+		ts := NewTestService(t)
+		defer ts.Cleanup()
+
+		// Verify instance is not initialized initially
+		profile1, err := ts.Service.GetInstanceProfile(ctx, &v1pb.GetInstanceProfileRequest{})
+		require.NoError(t, err)
+		require.Nil(t, profile1.Admin, "Instance should not be initialized before first admin user")
+
+		// Create the first admin user
+		user, err := ts.CreateHostUser(ctx, "admin")
+		require.NoError(t, err)
+		require.NotNil(t, user)
+
+		// Verify instance is now initialized
+		profile2, err := ts.Service.GetInstanceProfile(ctx, &v1pb.GetInstanceProfileRequest{})
+		require.NoError(t, err)
+		require.NotNil(t, profile2.Admin, "Instance should be initialized after first admin user is created")
+		require.Equal(t, user.Username, profile2.Admin.Username)
+	})
+
+	t.Run("Admin retrieval is cached by Store layer", func(t *testing.T) {
+		// Create test service
+		ts := NewTestService(t)
+		defer ts.Cleanup()
+
+		// Create admin user
+		user, err := ts.CreateHostUser(ctx, "admin")
+		require.NoError(t, err)
+
+		// Multiple calls should return consistent admin user (from cache)
+		for i := 0; i < 5; i++ {
+			profile, err := ts.Service.GetInstanceProfile(ctx, &v1pb.GetInstanceProfileRequest{})
+			require.NoError(t, err)
+			require.NotNil(t, profile.Admin)
+			require.Equal(t, user.Username, profile.Admin.Username)
+		}
+	})
+}