refactor: optimize system updates and create systems package

- Created SystemManager to handle system lifecycle and events
- Created tests for system management operations
- Added test helpers for creating and managing test systems
- Introduced optional port configuration in system config

beszel/internal/tests/hub.go

@@ -0,0 +1,58 @@
+// Package tests provides helpers for testing the application.
+package tests
+
+import (
+	"beszel/internal/hub"
+
+	"github.com/pocketbase/pocketbase/core"
+	"github.com/pocketbase/pocketbase/tests"
+
+	_ "github.com/pocketbase/pocketbase/migrations"
+)
+
+// TestHub is a wrapper hub instance used for testing.
+type TestHub struct {
+	core.App
+	*tests.TestApp
+	*hub.Hub
+}
+
+// NewTestHub creates and initializes a test application instance.
+//
+// It is the caller's responsibility to call app.Cleanup() when the app is no longer needed.
+func NewTestHub(optTestDataDir ...string) (*TestHub, error) {
+	var testDataDir string
+	if len(optTestDataDir) > 0 {
+		testDataDir = optTestDataDir[0]
+	}
+
+	return NewTestHubWithConfig(core.BaseAppConfig{
+		DataDir:       testDataDir,
+		EncryptionEnv: "pb_test_env",
+	})
+}
+
+// NewTestHubWithConfig creates and initializes a test application instance
+// from the provided config.
+//
+// If config.DataDir is not set it fallbacks to the default internal test data directory.
+//
+// config.DataDir is cloned for each new test application instance.
+//
+// It is the caller's responsibility to call app.Cleanup() when the app is no longer needed.
+func NewTestHubWithConfig(config core.BaseAppConfig) (*TestHub, error) {
+	testApp, err := tests.NewTestAppWithConfig(config)
+	if err != nil {
+		return nil, err
+	}
+
+	hub := hub.NewHub(testApp)
+
+	t := &TestHub{
+		App:     testApp,
+		TestApp: testApp,
+		Hub:     hub,
+	}
+
+	return t, nil
+}