feat: Adding very preliminar and broken test harness.

cmd/gagent/main.go

@@ -300,7 +300,8 @@ func init() {
 	if config.MonitorPort != 0 {
 		go func() {
 			log.Printf("[INFO] Starting Prometheus metrics exporter on port %d\n", config.MonitorPort)
-			log.Fatal(http.ListenAndServe(string(config.ListenAddr)+":"+strconv.Itoa(config.MonitorPort), nil))
+			err := http.ListenAndServe(string(config.ListenAddr)+":"+strconv.Itoa(config.MonitorPort), nil)
+			log.Printf("[ERROR] Prometheus metrics exporter returned: %s\n", err)
 		}()
 	}
 	autorestart.WatchFilename = config.File

cmd/gagent/main_test.go

@@ -0,0 +1,71 @@
+package main_test
+
+import (
+	"io/ioutil"
+	"os"
+	"testing"
+
+	main "github.com/dragonheim/gagent/cmd/gagent"
+	gstructs "github.com/dragonheim/gagent/internal/gstructs"
+)
+
+// This function will create a temporary config file for testing purposes
+func createTestConfigFile() (string, error) {
+	tmpfile, err := ioutil.TempFile("", "test_config_*.hcl")
+	if err != nil {
+		return "", err
+	}
+
+	content := []byte(`mode = "setup"
+listen_addr = "0.0.0.0"
+monitor_port = 8888
+client_port = 35572
+router_port = 35570
+worker_port = 35571
+`)
+	if _, err := tmpfile.Write(content); err != nil {
+		return "", err
+	}
+	if err := tmpfile.Close(); err != nil {
+		return "", err
+	}
+
+	return tmpfile.Name(), nil
+}
+
+func TestMain(t *testing.T) {
+	t.Run("Test setup mode with temp config file", func(t *testing.T) {
+		tmpConfig, err := createTestConfigFile()
+		if err != nil {
+			t.Fatalf("Failed to create temp config file: %v", err)
+		}
+		defer os.Remove(tmpConfig)
+
+		config := gstructs.GagentConfig{
+			File: tmpConfig,
+			Mode: "setup",
+		}
+
+		// Run the main function with the temporary config
+		main.Run(config)
+
+		// Check if the config has been set up correctly
+		expectedConfig := gstructs.GagentConfig{
+			Mode:        "setup",
+			ListenAddr:  "0.0.0.0",
+			MonitorPort: 8888,
+			ClientPort:  35572,
+			RouterPort:  35570,
+			WorkerPort:  35571,
+		}
+
+		if config.Mode != expectedConfig.Mode ||
+			config.ListenAddr != expectedConfig.ListenAddr ||
+			config.MonitorPort != expectedConfig.MonitorPort ||
+			config.ClientPort != expectedConfig.ClientPort ||
+			config.RouterPort != expectedConfig.RouterPort ||
+			config.WorkerPort != expectedConfig.WorkerPort {
+			t.Fatalf("Expected config %+v, got %+v", expectedConfig, config)
+		}
+	})
+}