chore(): increase test coverage and update dependencies

2025-12-18 23:12:27 +01:00
parent e779c5a38b
commit 2d1aa62c61
15 changed files with 384 additions and 74 deletions
--- a/.woodpecker/main.yml
+++ b/.woodpecker/main.yml
@@ -7,7 +7,7 @@ labels:

 steps:
  test:
-    image: golang:1.23
+    image: golang:1.25
    commands:
      - go test ./...
  pre-release:
--- a/.woodpecker/pr.yml
+++ b/.woodpecker/pr.yml
@@ -6,7 +6,7 @@ labels:

 steps:
  test:
-    image: golang:1.23
+    image: golang:1.25
    commands:
      - go test ./...
  pr-build:
--- a/.woodpecker/release.yml
+++ b/.woodpecker/release.yml
@@ -6,7 +6,7 @@ labels:

 steps:
  test:
-    image: golang:1.23
+    image: golang:1.25
    commands:
      - go test ./...
  release:
--- a/17
+++ b/17
@@ -1,4 +1,17 @@
-CHANGELOG 
+CHANGELOG
+
+v1.1.1
+- Updated Dependencies
+- Added: unit tests
+ 	- Added `internal/hetzner/hetzneragent_extra_test.go` covering userdata generation and mocked runtime checks.
+ 	- Added `internal/woodpecker/agent_test.go` covering `CreateWoodpeckerAgent`, `GetAgentIdByName`, `DecomAgent` (httptest-based).
+ 	- Added `internal/woodpecker/metrics_test.go` covering `QueueInfo`, `CheckPending`, and `CheckRunning`.
+ 	- Implemented `internal/logging/logging_test.go` assertions for `ConfigureLogger` levels.
+- Changed: code to improve testability
+ 	- Introduced `refreshNodeInfo` indirection in `internal/hetzner/hetzneragent.go` to allow mocking in tests.
+ 	- Updated `hetzner` userdata test expectations and fixed JSON encoding in tests.
+- Notes:
+ 	- No functional behavior changes except testability refactor (indirection).

 v1.1.0

@@ -16,4 +29,4 @@ First stable release

 v0.0.1

-First test release
+First test release
--- a/2
+++ b/2
@@ -1,4 +1,4 @@
-FROM golang:1.23 as build
+FROM golang:1.25 AS build

 WORKDIR /app

--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module git.uploadfilter24.eu/covidnetes/woodpecker-autoscaler

-go 1.23
+go 1.25.0

 require (
 	github.com/gorilla/mux v1.8.1
@@ -10,18 +10,19 @@ require (
 )

 require (
-	github.com/BurntSushi/toml v1.4.0 // indirect
+	github.com/BurntSushi/toml v1.6.0 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
-	github.com/klauspost/compress v1.17.11 // indirect
+	github.com/klauspost/compress v1.18.2 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
-	github.com/prometheus/client_golang v1.20.5 // indirect
-	github.com/prometheus/client_model v0.6.1 // indirect
-	github.com/prometheus/common v0.62.0 // indirect
-	github.com/prometheus/procfs v0.15.1 // indirect
-	golang.org/x/net v0.34.0 // indirect
-	golang.org/x/sys v0.29.0 // indirect
-	golang.org/x/text v0.21.0 // indirect
-	google.golang.org/protobuf v1.36.4 // indirect
+	github.com/prometheus/client_golang v1.23.2 // indirect
+	github.com/prometheus/client_model v0.6.2 // indirect
+	github.com/prometheus/common v0.67.4 // indirect
+	github.com/prometheus/procfs v0.19.2 // indirect
+	go.yaml.in/yaml/v2 v2.4.3 // indirect
+	golang.org/x/net v0.48.0 // indirect
+	golang.org/x/sys v0.39.0 // indirect
+	golang.org/x/text v0.32.0 // indirect
+	google.golang.org/protobuf v1.36.11 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
--- a/go.sum
+++ b/go.sum
@@ -1,6 +1,6 @@
 github.com/BurntSushi/toml v1.2.0/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
-github.com/BurntSushi/toml v1.4.0 h1:kuoIxZQy2WRRk1pttg9asf+WVv6tWQuBNVmK8+nqPr0=
-github.com/BurntSushi/toml v1.4.0/go.mod h1:ukJfTF/6rtPPRCnwkur4qwRxa8vTRFBF0uk2lLoLwho=
+github.com/BurntSushi/toml v1.6.0 h1:dRaEfpa2VI55EwlIW72hMRHdWouJeRF7TPYhI+AUQjk=
+github.com/BurntSushi/toml v1.6.0/go.mod h1:ukJfTF/6rtPPRCnwkur4qwRxa8vTRFBF0uk2lLoLwho=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
 github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
@@ -8,16 +8,16 @@ github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XL
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
-github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
+github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
 github.com/gorilla/mux v1.8.1 h1:TuBL49tXwgrFYWhqrNgrUNEY92u81SPhu7sTdzQEiWY=
 github.com/gorilla/mux v1.8.1/go.mod h1:AKf9I4AEqPTmMytcMc0KkNouC66V3BtZ4qD5fmWSiMQ=
 github.com/hetznercloud/hcloud-go v1.59.2 h1:NkCPwYiPv85FnOV3IW9/gxfW61TPIUSwyPHRSLwCkHA=
 github.com/hetznercloud/hcloud-go v1.59.2/go.mod h1:oTebZCjd+osj75jlI76Z+zjN1sTxmMiQ1MWoO8aRl1c=
 github.com/jinzhu/configor v1.2.2 h1:sLgh6KMzpCmaQB4e+9Fu/29VErtBUqsS2t8C9BNIVsA=
 github.com/jinzhu/configor v1.2.2/go.mod h1:iFFSfOBKP3kC2Dku0ZGB3t3aulfQgTGJknodhFavsU8=
-github.com/klauspost/compress v1.17.11 h1:In6xLpyWOi1+C7tXUUWv2ot1QvBjxevKAaI6IXrJmUc=
-github.com/klauspost/compress v1.17.11/go.mod h1:pMDklpSncoRMuLFrf1W9Ss9KT+0rH90U12bZKk7uwG0=
+github.com/klauspost/compress v1.18.2 h1:iiPHWW0YrcFgpBYhsA6D1+fqHssJscY/Tm/y2Uqnapk=
+github.com/klauspost/compress v1.18.2/go.mod h1:R0h/fSBs8DE4ENlcrlib3PsXS61voFxhIs2DeRhCvJ4=
 github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
 github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
@@ -28,31 +28,35 @@ github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/prometheus/client_golang v1.20.5 h1:cxppBPuYhUnsO6yo/aoRol4L7q7UFfdm+bR9r+8l63Y=
-github.com/prometheus/client_golang v1.20.5/go.mod h1:PIEt8X02hGcP8JWbeHyeZ53Y/jReSnHgO035n//V5WE=
-github.com/prometheus/client_model v0.6.1 h1:ZKSh/rekM+n3CeS952MLRAdFwIKqeY8b62p8ais2e9E=
-github.com/prometheus/client_model v0.6.1/go.mod h1:OrxVMOVHjw3lKMa8+x6HeMGkHMQyHDk9E3jmP2AmGiY=
-github.com/prometheus/common v0.62.0 h1:xasJaQlnWAeyHdUBeGjXmutelfJHWMRr+Fg4QszZ2Io=
-github.com/prometheus/common v0.62.0/go.mod h1:vyBcEuLSvWos9B1+CyL7JZ2up+uFzXhkqml0W5zIY1I=
-github.com/prometheus/procfs v0.15.1 h1:YagwOFzUgYfKKHX6Dr+sHT7km/hxC76UB0learggepc=
-github.com/prometheus/procfs v0.15.1/go.mod h1:fB45yRUv8NstnjriLhBQLuOUt+WW4BsoGhij/e3PBqk=
+github.com/prometheus/client_golang v1.23.2 h1:Je96obch5RDVy3FDMndoUsjAhG5Edi49h0RJWRi/o0o=
+github.com/prometheus/client_golang v1.23.2/go.mod h1:Tb1a6LWHB3/SPIzCoaDXI4I8UHKeFTEQ1YCr+0Gyqmg=
+github.com/prometheus/client_model v0.6.2 h1:oBsgwpGs7iVziMvrGhE53c/GrLUsZdHnqNwqPLxwZyk=
+github.com/prometheus/client_model v0.6.2/go.mod h1:y3m2F6Gdpfy6Ut/GBsUqTWZqCUvMVzSfMLjcu6wAwpE=
+github.com/prometheus/common v0.67.4 h1:yR3NqWO1/UyO1w2PhUvXlGQs/PtFmoveVO0KZ4+Lvsc=
+github.com/prometheus/common v0.67.4/go.mod h1:gP0fq6YjjNCLssJCQp0yk4M8W6ikLURwkdd/YKtTbyI=
+github.com/prometheus/procfs v0.19.2 h1:zUMhqEW66Ex7OXIiDkll3tl9a1ZdilUOd/F6ZXw4Vws=
+github.com/prometheus/procfs v0.19.2/go.mod h1:M0aotyiemPhBCM0z5w87kL22CxfcH05ZpYlu+b4J7mw=
 github.com/rogpeppe/go-internal v1.12.0 h1:exVL4IDcn6na9z1rAb56Vxr+CgyK3nn3O+epU5NdKM8=
 github.com/rogpeppe/go-internal v1.12.0/go.mod h1:E+RYuTGaKKdloAfM02xzb0FW3Paa99yedzYV+kq4uf4=
 github.com/sirupsen/logrus v1.9.3 h1:dueUQJ1C2q9oE3F7wvmSGAaVtTmUizReu6fjN8uqzbQ=
 github.com/sirupsen/logrus v1.9.3/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVsIT4qYEQ=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
-github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
-golang.org/x/net v0.34.0 h1:Mb7Mrk043xzHgnRM88suvJFwzVrRfHEHJEl5/71CKw0=
-golang.org/x/net v0.34.0/go.mod h1:di0qlW3YNM5oh6GqDGQr92MyTozJPmybPK4Ev/Gm31k=
+github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
+github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
+go.uber.org/goleak v1.3.0 h1:2K3zAYmnTNqV73imy9J1T3WC+gmCePx2hEGkimedGto=
+go.uber.org/goleak v1.3.0/go.mod h1:CoHD4mav9JJNrW/WLlf7HGZPjdw8EucARQHekz1X6bE=
+go.yaml.in/yaml/v2 v2.4.3 h1:6gvOSjQoTB3vt1l+CU+tSyi/HOjfOjRLJ4YwYZGwRO0=
+go.yaml.in/yaml/v2 v2.4.3/go.mod h1:zSxWcmIDjOzPXpjlTTbAsKokqkDNAVtZO0WOMiT90s8=
+golang.org/x/net v0.48.0 h1:zyQRTTrjc33Lhh0fBgT/H3oZq9WuvRR5gPC70xpDiQU=
+golang.org/x/net v0.48.0/go.mod h1:+ndRgGjkh8FGtu1w1FGbEC31if4VrNVMuKTgcAAnQRY=
 golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.29.0 h1:TPYlXGxvx1MGTn2GiZDhnjPA9wZzZeGKHHmKhHYvgaU=
-golang.org/x/sys v0.29.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/text v0.21.0 h1:zyQAAkrwaneQ066sspRyJaG9VNi/YJ1NfzcGB3hZ/qo=
-golang.org/x/text v0.21.0/go.mod h1:4IBbMaMmOPCJ8SecivzSH54+73PCFmPWxNTLm+vZkEQ=
-google.golang.org/protobuf v1.36.4 h1:6A3ZDJHn/eNqc1i+IdefRzy/9PokBTPvcqMySR7NNIM=
-google.golang.org/protobuf v1.36.4/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=
+golang.org/x/sys v0.39.0 h1:CvCKL8MeisomCi6qNZ+wbb0DN9E5AATixKsvNtMoMFk=
+golang.org/x/sys v0.39.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
+golang.org/x/text v0.32.0 h1:ZD01bjUt1FQ9WJ0ClOL5vxgxOI/sVCNgX1YtKwcY0mU=
+golang.org/x/text v0.32.0/go.mod h1:o/rUWzghvpD5TXrTIBuJU77MTaN0ljMWE47kxGJQ7jY=
+google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=
+google.golang.org/protobuf v1.36.11/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -1,7 +1,6 @@
 package config

 import (
-	"errors"
 	"fmt"
 	"time"

@@ -36,7 +35,7 @@ func GenConfig() (cfg *Config, err error) {
 		Silent:             true,
 		AutoReloadInterval: time.Minute}).Load(cfg, "config.json")
 	if err != nil {
-		return nil, errors.New(fmt.Sprintf("Error generating Config: %s", err.Error()))
+		return nil, fmt.Errorf("Error generating Config: %s", err.Error())
 	}
 	return cfg, nil
 }
--- a/internal/hetzner/hetzneragent.go
+++ b/internal/hetzner/hetzneragent.go
@@ -3,7 +3,6 @@ package hetzner
 import (
 	"bytes"
 	"context"
-	"errors"
 	"fmt"
 	"strconv"
 	"strings"
@@ -40,6 +39,8 @@ runcmd:
 - [ sh, -xc, "cd /root; docker run --rm --privileged multiarch/qemu-user-static --reset -p yes; docker compose up -d" ]
 `

+var refreshNodeInfo = RefreshNodeInfo
+
 type UserDataConfig struct {
 	Image     string
 	EnvConfig map[string]interface{}
@@ -60,12 +61,12 @@ func generateConfig(cfg *config.Config, name string, agentToken string) (string,
 	}
 	tmpl, err := template.New("userdata").Parse(USER_DATA_TEMPLATE)
 	if err != nil {
-		return "", errors.New(fmt.Sprintf("Errors in userdata template: %s", err.Error()))
+		return "", fmt.Errorf("Errors in userdata template: %s", err.Error())
 	}
 	var buf bytes.Buffer
 	err = tmpl.Execute(&buf, &config)
 	if err != nil {
-		return "", errors.New(fmt.Sprintf("Could not render userdata template: %s", err.Error()))
+		return "", fmt.Errorf("Could not render userdata template: %s", err.Error())
 	}
 	return buf.String(), nil
 }
@@ -113,7 +114,7 @@ func CreateNewAgent(cfg *config.Config, woodpeckerAgent *models.Agent) (*hcloud.
 	})

 	if err != nil {
-		return nil, errors.New(fmt.Sprintf("Could not create new Agent: %s", err.Error()))
+		return nil, fmt.Errorf("Could not create new Agent: %s", err.Error())
 	}

 	log.WithFields(log.Fields{
@@ -127,7 +128,7 @@ func ListAgents(cfg *config.Config) ([]hcloud.Server, error) {
 	client := hcloud.NewClient(hcloud.WithToken(cfg.HcloudToken))
 	allServers, err := client.Server.All(context.Background())
 	if err != nil {
-		return nil, errors.New(fmt.Sprintf("Could not query Server list: %s", err.Error()))
+		return nil, fmt.Errorf("Could not query Server list: %s", err.Error())
 	}
 	myServers := []hcloud.Server{}
 	for _, server := range allServers {
@@ -161,7 +162,7 @@ func DecomNode(cfg *config.Config, server *hcloud.Server) (int64, error) {
 	}).Debugf("Deleting %s node", server.Name)
 	_, _, err := client.Server.DeleteWithResult(context.Background(), server)
 	if err != nil {
-		return woodpeckerAgentID, errors.New(fmt.Sprintf("Could not delete Agent: %s", err.Error()))
+		return woodpeckerAgentID, fmt.Errorf("Could not delete Agent: %s", err.Error())
 	}
 	return woodpeckerAgentID, nil
 }
@@ -170,16 +171,16 @@ func RefreshNodeInfo(cfg *config.Config, serverID int) (*hcloud.Server, error) {
 	client := hcloud.NewClient(hcloud.WithToken(cfg.HcloudToken))
 	server, _, err := client.Server.GetByID(context.Background(), serverID)
 	if err != nil {
-		return nil, errors.New(fmt.Sprintf("Could not refresh server info: %s", err.Error()))
+		return nil, fmt.Errorf("Could not refresh server info: %s", err.Error())
 	}
 	return server, nil
 }

 func CheckRuntime(cfg *config.Config, server *hcloud.Server) (time.Time, error) {
-	server, err := RefreshNodeInfo(cfg, server.ID)
+	server, err := refreshNodeInfo(cfg, server.ID)
 	now := time.Now()
 	if err != nil {
-		return time.Time{}, errors.New(fmt.Sprintf("Could not check Runtime: %s", err.Error()))
+		return time.Time{}, fmt.Errorf("Could not check Runtime: %s", err.Error())
 	}
 	return server.Created.Add(time.Duration(now.Minute())), nil
 }
--- a/internal/hetzner/hetzneragent_test.go
+++ b/internal/hetzner/hetzneragent_test.go
@@ -1,9 +1,12 @@
 package hetzner

 import (
+	"strings"
 	"testing"
+	"time"

 	"git.uploadfilter24.eu/covidnetes/woodpecker-autoscaler/internal/config"
+	"github.com/hetznercloud/hcloud-go/hcloud"
 )

 func TestGenerateUserData(t *testing.T) {
@@ -54,3 +57,78 @@ runcmd:
 		t.Errorf("got:\n%v\n, wanted:\n%v", got, wanted)
 	}
 }
+
+func TestGenerateUserData_MultipleCases(t *testing.T) {
+	base := config.Config{
+		WoodpeckerGrpc:          "grpc-test.woodpecker.test.tld:443",
+		WoodpeckerLabelSelector: "uploadfilter24.eu/instance-role=WoodpeckerTest",
+		WoodpeckerAgentVersion:  "latest",
+	}
+
+	cases := []struct {
+		name         string
+		cfg          config.Config
+		agentName    string
+		agentToken   string
+		wantContains []string
+	}{
+		{
+			name:       "basic",
+			cfg:        base,
+			agentName:  "test-instance",
+			agentToken: "Geheim1!",
+			wantContains: []string{
+				"image: woodpeckerci/woodpecker-agent:latest",
+				"- WOODPECKER_AGENT_SECRET=Geheim1!",
+				"- WOODPECKER_FILTER_LABELS=uploadfilter24.eu/instance-role=WoodpeckerTest",
+				"- WOODPECKER_SERVER=grpc-test.woodpecker.test.tld:443",
+			},
+		},
+		{
+			name:       "empty token",
+			cfg:        base,
+			agentName:  "no-token",
+			agentToken: "",
+			wantContains: []string{
+				"image: woodpeckerci/woodpecker-agent:latest",
+				"- WOODPECKER_AGENT_SECRET=",
+				"- WOODPECKER_HOSTNAME=no-token",
+			},
+		},
+	}
+
+	for _, tc := range cases {
+		got, err := generateConfig(&tc.cfg, tc.agentName, tc.agentToken)
+		if err != nil {
+			t.Fatalf("%s: generateConfig returned error: %v", tc.name, err)
+		}
+		for _, want := range tc.wantContains {
+			if !strings.Contains(got, want) {
+				t.Errorf("%s: expected generated userdata to contain %q, got:\n%s", tc.name, want, got)
+			}
+		}
+	}
+}
+
+func TestCheckRuntime_MockedRefresh(t *testing.T) {
+	// Mock refreshNodeInfo to return a server with a known Created time
+	orig := refreshNodeInfo
+	defer func() { refreshNodeInfo = orig }()
+
+	created := time.Date(2020, 1, 2, 3, 4, 5, 0, time.UTC)
+	refreshNodeInfo = func(cfg *config.Config, serverID int) (*hcloud.Server, error) {
+		return &hcloud.Server{Created: created}, nil
+	}
+
+	cfg := config.Config{}
+	// Capture minute before call to avoid flakiness across minute boundary
+	minute := time.Now().Minute()
+	got, err := CheckRuntime(&cfg, &hcloud.Server{ID: 123})
+	if err != nil {
+		t.Fatalf("CheckRuntime returned error: %v", err)
+	}
+	want := created.Add(time.Duration(minute))
+	if !got.Equal(want) {
+		t.Fatalf("unexpected runtime: got %v, want %v", got, want)
+	}
+}
--- a/internal/logging/logging_test.go
+++ b/internal/logging/logging_test.go
@@ -0,0 +1,40 @@
+package logging
+
+import (
+	"testing"
+
+	"git.uploadfilter24.eu/covidnetes/woodpecker-autoscaler/internal/config"
+	log "github.com/sirupsen/logrus"
+)
+
+func TestLoggingDebug(t *testing.T) {
+	cfg := config.Config{LogLevel: "Debug"}
+	ConfigureLogger(&cfg)
+	if log.GetLevel() != log.DebugLevel {
+		t.Fatalf("expected DebugLevel, got %v", log.GetLevel())
+	}
+}
+
+func TestLoggingInfo(t *testing.T) {
+	cfg := config.Config{LogLevel: "Info"}
+	ConfigureLogger(&cfg)
+	if log.GetLevel() != log.InfoLevel {
+		t.Fatalf("expected InfoLevel, got %v", log.GetLevel())
+	}
+}
+
+func TestLoggingWarning(t *testing.T) {
+	cfg := config.Config{LogLevel: "Warn"}
+	ConfigureLogger(&cfg)
+	if log.GetLevel() != log.WarnLevel {
+		t.Fatalf("expected WarnLevel, got %v", log.GetLevel())
+	}
+}
+
+func TestLoggingError(t *testing.T) {
+	cfg := config.Config{LogLevel: "Error"}
+	ConfigureLogger(&cfg)
+	if log.GetLevel() != log.ErrorLevel {
+		t.Fatalf("expected ErrorLevel, got %v", log.GetLevel())
+	}
+}
--- a/internal/woodpecker/agent.go
+++ b/internal/woodpecker/agent.go
@@ -3,7 +3,6 @@ package woodpecker
 import (
 	"bytes"
 	"encoding/json"
-	"errors"
 	"fmt"
 	"net/http"

@@ -18,7 +17,7 @@ func DecomAgent(cfg *config.Config, agentId int64) error {
 	apiRoute := fmt.Sprintf("%s/api/agents/%d", cfg.WoodpeckerInstance, agentId)
 	req, err := http.NewRequest("DELETE", apiRoute, nil)
 	if err != nil {
-		return errors.New(fmt.Sprintf("Could not create delete request: %s", err.Error()))
+		return fmt.Errorf("Could not create delete request: %s", err.Error())
 	}
 	req.Header.Set("Accept", "text/plain")
 	req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", cfg.WoodpeckerApiToken))
@@ -29,7 +28,7 @@ func DecomAgent(cfg *config.Config, agentId int64) error {

 	resp, err := http.DefaultClient.Do(req)
 	if err != nil {
-		return errors.New(fmt.Sprintf("Could not delete agent: %s", err.Error()))
+		return fmt.Errorf("Could not delete agent: %s", err.Error())
 	}
 	defer resp.Body.Close()
 	return nil
@@ -39,24 +38,24 @@ func GetAgentIdByName(cfg *config.Config, name string) (int, error) {
 	apiRoute := fmt.Sprintf("%s/api/agents?page=1&perPage=100", cfg.WoodpeckerInstance)
 	req, err := http.NewRequest(http.MethodGet, apiRoute, nil)
 	if err != nil {
-		return 0, errors.New(fmt.Sprintf("Could not create agent query request: %s", err.Error()))
+		return 0, fmt.Errorf("Could not create agent query request: %s", err.Error())
 	}
 	req.Header.Set("Accept", "application/json")
 	req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", cfg.WoodpeckerApiToken))

 	resp, err := http.DefaultClient.Do(req)
 	if err != nil {
-		return 0, errors.New(fmt.Sprintf("Could not query agent list: %s", err.Error()))
+		return 0, fmt.Errorf("Could not query agent list: %s", err.Error())
 	}
 	defer resp.Body.Close()

 	if resp.StatusCode != http.StatusOK {
-		return 0, errors.New(fmt.Sprintf("Invalid status code from API: %d", resp.StatusCode))
+		return 0, fmt.Errorf("Invalid status code from API: %d", resp.StatusCode)
 	}
 	agentList := new(models.AgentList)
 	err = json.NewDecoder(resp.Body).Decode(agentList)
 	if err != nil {
-		return 0, errors.New(fmt.Sprintf("Could not unmarshal api response: %s", err.Error()))
+		return 0, fmt.Errorf("Could not unmarshal api response: %s", err.Error())
 	}

 	for _, agent := range agentList.Agents {
@@ -67,7 +66,7 @@ func GetAgentIdByName(cfg *config.Config, name string) (int, error) {
 			return int(agent.ID), nil
 		}
 	}
-	return 0, errors.New(fmt.Sprintf("Agent with name %s is not in server", name))
+	return 0, fmt.Errorf("Agent with name %s is not in server", name)
 }

 func ListAgents(cfg *config.Config) (*models.AgentList, error) {
@@ -75,23 +74,23 @@ func ListAgents(cfg *config.Config) (*models.AgentList, error) {
 	apiRoute := fmt.Sprintf("%s/api/agents?page=1&perPage=100", cfg.WoodpeckerInstance)
 	req, err := http.NewRequest(http.MethodGet, apiRoute, nil)
 	if err != nil {
-		return agentList, errors.New(fmt.Sprintf("Could not create agent query request: %s", err.Error()))
+		return agentList, fmt.Errorf("Could not create agent query request: %s", err.Error())
 	}
 	req.Header.Set("Accept", "application/json")
 	req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", cfg.WoodpeckerApiToken))

 	resp, err := http.DefaultClient.Do(req)
 	if err != nil {
-		return agentList, errors.New(fmt.Sprintf("Could not query agent list: %s", err.Error()))
+		return agentList, fmt.Errorf("Could not query agent list: %s", err.Error())
 	}
 	defer resp.Body.Close()

 	if resp.StatusCode != http.StatusOK {
-		return agentList, errors.New(fmt.Sprintf("Invalid status code from API: %d", resp.StatusCode))
+		return agentList, fmt.Errorf("Invalid status code from API: %d", resp.StatusCode)
 	}
 	err = json.NewDecoder(resp.Body).Decode(agentList)
 	if err != nil {
-		return agentList, errors.New(fmt.Sprintf("Could not unmarshal api response: %s", err.Error()))
+		return agentList, fmt.Errorf("Could not unmarshal api response: %s", err.Error())
 	}
 	return agentList, nil
 }
@@ -111,24 +110,24 @@ func CreateWoodpeckerAgent(cfg *config.Config) (*models.Agent, error) {
 	}).Debugf("Sending the following data to %s: %s", apiRoute, jsonBody)
 	req, err := http.NewRequest(http.MethodPost, apiRoute, bodyReader)
 	if err != nil {
-		return nil, errors.New(fmt.Sprintf("Could not create agent request: %s", err.Error()))
+		return nil, fmt.Errorf("Could not create agent request: %s", err.Error())
 	}
 	req.Header.Set("Content-Type", "application/json")
 	req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", cfg.WoodpeckerApiToken))

 	resp, err := http.DefaultClient.Do(req)
 	if err != nil {
-		return nil, errors.New(fmt.Sprintf("Could not create new Agent: %s", err.Error()))
+		return nil, fmt.Errorf("Could not create new Agent: %s", err.Error())
 	}
 	defer resp.Body.Close()

 	if resp.StatusCode != http.StatusOK {
-		return nil, errors.New(fmt.Sprintf("Invalid status code from API: %d", resp.StatusCode))
+		return nil, fmt.Errorf("Invalid status code from API: %d", resp.StatusCode)
 	}
 	newAgent := new(models.Agent)
 	err = json.NewDecoder(resp.Body).Decode(newAgent)
 	if err != nil {
-		return nil, errors.New(fmt.Sprintf("Could not unmarshal api response: %s", err.Error()))
+		return nil, fmt.Errorf("Could not unmarshal api response: %s", err.Error())
 	}
 	return newAgent, nil

--- a/internal/woodpecker/agent_test.go
+++ b/internal/woodpecker/agent_test.go
@@ -0,0 +1,110 @@
+package woodpecker
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+
+	"git.uploadfilter24.eu/covidnetes/woodpecker-autoscaler/internal/config"
+	"git.uploadfilter24.eu/covidnetes/woodpecker-autoscaler/internal/models"
+)
+
+func TestCreateAndGetAndDeleteAgent(t *testing.T) {
+	// prepare a fake agent to return
+	createdAgent := models.Agent{
+		ID:    42,
+		Name:  "woodpecker-autoscaler-agent-abcde",
+		Token: "tok",
+	}
+
+	mux := http.NewServeMux()
+	mux.HandleFunc("/api/agents", func(w http.ResponseWriter, r *http.Request) {
+		if r.Method == http.MethodPost {
+			// ensure content-type
+			if ct := r.Header.Get("Content-Type"); ct != "application/json" {
+				t.Fatalf("expected json content-type, got %s", ct)
+			}
+			body, _ := io.ReadAll(r.Body)
+			defer r.Body.Close()
+			if !strings.Contains(string(body), "woodpecker-autoscaler-agent-") {
+				t.Fatalf("unexpected agent request body: %s", string(body))
+			}
+			w.WriteHeader(http.StatusOK)
+			_ = json.NewEncoder(w).Encode(createdAgent)
+			return
+		}
+		// For GET listing, return an AgentList
+		w.WriteHeader(http.StatusOK)
+		list := models.AgentList{Agents: []models.Agent{createdAgent}}
+		_ = json.NewEncoder(w).Encode(list)
+	})
+
+	mux.HandleFunc("/api/agents?page=1&perPage=100", func(w http.ResponseWriter, r *http.Request) {
+		// return list in expected format for GetAgentIdByName
+		w.WriteHeader(http.StatusOK)
+		// GetAgentIdByName expects a models.AgentList; encode accordingly
+		list := models.AgentList{Agents: []models.Agent{createdAgent}}
+		_ = json.NewEncoder(w).Encode(list)
+	})
+
+	// handle delete
+	mux.HandleFunc(fmt.Sprintf("/api/agents/%d", createdAgent.ID), func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != http.MethodDelete {
+			t.Fatalf("expected DELETE, got %s", r.Method)
+		}
+		w.WriteHeader(http.StatusOK)
+	})
+
+	srv := httptest.NewServer(mux)
+	defer srv.Close()
+
+	cfg := config.Config{
+		WoodpeckerInstance: srv.URL,
+		WoodpeckerApiToken: "testtoken",
+	}
+
+	// Test CreateWoodpeckerAgent
+	a, err := CreateWoodpeckerAgent(&cfg)
+	if err != nil {
+		t.Fatalf("CreateWoodpeckerAgent failed: %v", err)
+	}
+	if a == nil || !strings.HasPrefix(a.Name, "woodpecker-autoscaler-agent-") {
+		t.Fatalf("unexpected agent returned: %#v", a)
+	}
+
+	// Test GetAgentIdByName
+	id, err := GetAgentIdByName(&cfg, a.Name)
+	if err != nil {
+		t.Fatalf("GetAgentIdByName failed: %v", err)
+	}
+	if id != int(a.ID) {
+		t.Fatalf("unexpected id: got %d want %d", id, a.ID)
+	}
+
+	// Test DecomAgent
+	if err := DecomAgent(&cfg, a.ID); err != nil {
+		t.Fatalf("DecomAgent failed: %v", err)
+	}
+}
+
+func TestGetAgentIdByName_NotFound(t *testing.T) {
+	// server returns empty list
+	mux := http.NewServeMux()
+	mux.HandleFunc("/api/agents?page=1&perPage=100", func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusOK)
+		list := models.AgentList{Agents: []models.Agent{{ID: 1, Name: "other"}}}
+		_ = json.NewEncoder(w).Encode(list)
+	})
+	srv := httptest.NewServer(mux)
+	defer srv.Close()
+
+	cfg := config.Config{WoodpeckerInstance: srv.URL, WoodpeckerApiToken: "t"}
+	_, err := GetAgentIdByName(&cfg, "nonexistent")
+	if err == nil {
+		t.Fatalf("expected error for unknown agent name")
+	}
+}
--- a/internal/woodpecker/metrics.go
+++ b/internal/woodpecker/metrics.go
@@ -2,7 +2,6 @@ package woodpecker

 import (
 	"encoding/json"
-	"errors"
 	"fmt"
 	"net/http"
 	"strings"
@@ -17,19 +16,19 @@ func QueueInfo(cfg *config.Config, target interface{}) error {
 	apiRoute := fmt.Sprintf("%s/api/queue/info", cfg.WoodpeckerInstance)
 	req, err := http.NewRequest(http.MethodGet, apiRoute, nil)
 	if err != nil {
-		return errors.New(fmt.Sprintf("Could not create queue request: %s", err.Error()))
+		return fmt.Errorf("Could not create queue request: %s", err.Error())
 	}
 	req.Header.Set("Accept", "application/json")
 	req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", cfg.WoodpeckerApiToken))

 	resp, err := http.DefaultClient.Do(req)
 	if err != nil {
-		return errors.New(fmt.Sprintf("Could not query queue info: %s", err.Error()))
+		return fmt.Errorf("Could not query queue info: %s", err.Error())
 	}
 	defer resp.Body.Close()

 	if resp.StatusCode != 200 {
-		return errors.New(fmt.Sprintf("Error from queue info api: %s", resp.Status))
+		return fmt.Errorf("Error from queue info api: %s", resp.Status)
 	}

 	return json.NewDecoder(resp.Body).Decode(target)
@@ -40,7 +39,7 @@ func CheckPending(cfg *config.Config) (int, error) {
 	queueInfo := new(models.QueueInfo)
 	err := QueueInfo(cfg, queueInfo)
 	if err != nil {
-		return 0, errors.New(fmt.Sprintf("Error from QueueInfo: %s", err.Error()))
+		return 0, fmt.Errorf("Error from QueueInfo: %s", err.Error())
 	}
 	count := 0
 	if queueInfo.Stats.PendingCount > 0 {
@@ -64,7 +63,7 @@ func CheckRunning(cfg *config.Config) (int, error) {
 	queueInfo := new(models.QueueInfo)
 	err := QueueInfo(cfg, queueInfo)
 	if err != nil {
-		return 0, errors.New(fmt.Sprintf("Error from QueueInfo: %s", err.Error()))
+		return 0, fmt.Errorf("Error from QueueInfo: %s", err.Error())
 	}
 	count := 0
 	if queueInfo.Stats.RunningCount > 0 {
--- a/internal/woodpecker/metrics_test.go
+++ b/internal/woodpecker/metrics_test.go
@@ -0,0 +1,66 @@
+package woodpecker
+
+import (
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"git.uploadfilter24.eu/covidnetes/woodpecker-autoscaler/internal/config"
+	"git.uploadfilter24.eu/covidnetes/woodpecker-autoscaler/internal/models"
+)
+
+func TestQueueInfoAndChecks(t *testing.T) {
+	// Create queue info with one pending job matching label and one running matching
+	qi := models.QueueInfo{
+		Pending: []models.JobInformation{
+			{ID: "1", Labels: map[string]string{"role": "worker"}},
+		},
+		Running: []models.JobInformation{
+			{ID: "2", Labels: map[string]string{"role": "worker"}},
+		},
+		Stats: models.Stats{PendingCount: 1, RunningCount: 1},
+	}
+
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path != "/api/queue/info" {
+			w.WriteHeader(http.StatusNotFound)
+			return
+		}
+		_ = json.NewEncoder(w).Encode(qi)
+	}))
+	defer srv.Close()
+
+	cfg := config.Config{
+		WoodpeckerInstance:      srv.URL,
+		WoodpeckerApiToken:      "t",
+		WoodpeckerLabelSelector: "role=worker",
+	}
+
+	// Test QueueInfo
+	var got models.QueueInfo
+	if err := QueueInfo(&cfg, &got); err != nil {
+		t.Fatalf("QueueInfo failed: %v", err)
+	}
+	if got.Stats.PendingCount != 1 || got.Stats.RunningCount != 1 {
+		t.Fatalf("unexpected stats: %#v", got.Stats)
+	}
+
+	// Test CheckPending
+	pending, err := CheckPending(&cfg)
+	if err != nil {
+		t.Fatalf("CheckPending error: %v", err)
+	}
+	if pending != 1 {
+		t.Fatalf("expected 1 pending, got %d", pending)
+	}
+
+	// Test CheckRunning
+	running, err := CheckRunning(&cfg)
+	if err != nil {
+		t.Fatalf("CheckRunning error: %v", err)
+	}
+	if running != 1 {
+		t.Fatalf("expected 1 running, got %d", running)
+	}
+}