fix #2 and added some minimal tests

.woodpecker.yml

@@ -1,4 +1,12 @@
 steps:
+  test:
+    image: golang
+    commands:
+      - go test ./...
+    when:
+      event:
+        - push
+        - pull_request
   build:
     image: woodpeckerci/plugin-docker-buildx
     settings:

internal/config_test.go

@@ -0,0 +1,25 @@
+package internal
+
+import (
+	"reflect"
+	"testing"
+)
+
+var defaultConfig = Config{
+	LogLevel:       "Info",
+	LabelSelector:  "kops.k8s.io/instance-role=Node",
+	Protocol:       "http",
+	HcloudToken:    "",
+	FloatingIPName: "",
+	DryRun:         false,
+}
+
+func TestConfigDefaults(t *testing.T) {
+	cfg, err := GenConfig()
+	if err != nil {
+		t.Errorf("%s", err.Error())
+	}
+	if !reflect.DeepEqual(&defaultConfig, cfg) {
+		t.Errorf("got %+v, want %+v", cfg, defaultConfig)
+	}
+}

internal/health_test.go

@@ -0,0 +1,23 @@
+package internal
+
+import (
+	"net/http"
+	"strings"
+	"testing"
+)
+
+func TestHealth(t *testing.T) {
+	go func() {
+		StartHealthEndpoint()
+	}()
+	request, _ := http.NewRequest(http.MethodGet, "http://localhost:8080/health", strings.NewReader(""))
+	resp, err := http.DefaultClient.Do(request)
+
+	if err != nil {
+		t.Errorf("Health endpoint did not start: %v", err)
+	}
+
+	if resp.StatusCode != http.StatusOK {
+		t.Errorf("Bad response from health endpoint. Want: %d, got %d", http.StatusOK, resp.StatusCode)
+	}
+}

internal/hetzner.go

@@ -78,6 +78,12 @@ func AttachFloatingIpToNode(cfg *Config, server hcloud.Server) error {
 	if err != nil {
 		return errors.New(fmt.Sprintf("Could not find Floating IP by name: %s", err.Error()))
 	}
+	if floatingIP.Server.ID == server.ID {
+		log.WithFields(log.Fields{
+			"Caller": "AttachFloatingIpToNode",
+		}).Info(fmt.Sprintf("Floating IP %s already assigned to Node %s", cfg.FloatingIPName, server.Name))
+		return nil
+	}
 	_, _, err = client.FloatingIP.Assign(context.TODO(), floatingIP, &server)
 	if err != nil {
 		log.WithFields(log.Fields{