diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 4066875..9172556 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -24,6 +24,17 @@ jobs:
     - name: test
       run: make test
 
+    - name: Update coverage report
+      uses: ncruces/go-coverage-report@main
+      with:
+        report: true
+        chart: true
+        amend: true
+      if: |
+        matrix.os == 'ubuntu-latest' &&
+        github.event_name == 'push'  
+      continue-on-error: true
+  
   golangci:
     name: lint
     runs-on: ubuntu-latest
diff --git a/.gitignore b/.gitignore
index d1b1031..b992fd1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 test
 kleingebaeck
 releases
+t/out
diff --git a/README.md b/README.md
index 5fbd83d..7146627 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,7 @@
 [![License](https://img.shields.io/badge/license-GPL-blue.svg)](https://github.com/tlinden/kleingebaeck/blob/master/LICENSE)
 [![Go Report Card](https://goreportcard.com/badge/github.com/tlinden/kleingebaeck)](https://goreportcard.com/report/github.com/tlinden/kleingebaeck) 
 [![Actions](https://github.com/tlinden/kleingebaeck/actions/workflows/ci.yaml/badge.svg)](https://github.com/tlinden/kleingebaeck/actions)
+[![Go Coverage](https://github.com/tlinden/kleingebaeck/wiki/coverage.svg)](https://raw.githack.com/wiki/tlinden/kleingebaeck/coverage.html)
 ![GitHub License](https://img.shields.io/github/license/tlinden/kleingebaeck)
 [![GitHub release](https://img.shields.io/github/v/release/tlinden/kleingebaeck?color=%2300a719)](https://github.com/TLINDEN/kleingebaeck/releases/latest)
 
diff --git a/config.go b/config.go
index 862a8e1..be53e30 100644
--- a/config.go
+++ b/config.go
@@ -19,6 +19,7 @@ package main
 import (
 	"errors"
 	"fmt"
+	"io"
 	"os"
 	"path/filepath"
 	"runtime"
@@ -87,7 +88,7 @@ func (c *Config) IncrImgs(num int) {
 }
 
 // load commandline flags and config file
-func InitConfig() (*Config, error) {
+func InitConfig(w io.Writer) (*Config, error) {
 	var k = koanf.New(".")
 
 	// determine template based on os
@@ -103,13 +104,13 @@ func InitConfig() (*Config, error) {
 		"loglevel": "notice",
 		"userid":   0,
 	}, "."), nil); err != nil {
-                return nil, err
-        }
+		return nil, err
+	}
 
 	// setup custom usage
 	f := flag.NewFlagSet("config", flag.ContinueOnError)
 	f.Usage = func() {
-		fmt.Println(Usage)
+		fmt.Fprintln(w, Usage)
 		os.Exit(0)
 	}
 
@@ -125,8 +126,8 @@ func InitConfig() (*Config, error) {
 	f.BoolP("manual", "m", false, "show manual")
 
 	if err := f.Parse(os.Args[1:]); err != nil {
-                return nil, err
-        }
+		return nil, err
+	}
 
 	// generate a  list of config files to try  to load, including the
 	// one provided via -c, if any
diff --git a/main.go b/main.go
index fdefc9a..5f334c3 100644
--- a/main.go
+++ b/main.go
@@ -20,6 +20,7 @@ package main
 import (
 	"errors"
 	"fmt"
+	"io"
 	"log/slog"
 	"os"
 	"runtime/debug"
@@ -30,10 +31,10 @@ import (
 const LevelNotice = slog.Level(2)
 
 func main() {
-	os.Exit(Main())
+	os.Exit(Main(os.Stdout))
 }
 
-func Main() int {
+func Main(w io.Writer) int {
 	logLevel := &slog.LevelVar{}
 	opts := &tint.Options{
 		Level:     logLevel,
@@ -49,22 +50,22 @@ func Main() int {
 	}
 
 	logLevel.Set(LevelNotice)
-	var handler slog.Handler = tint.NewHandler(os.Stdout, opts)
+	handler := tint.NewHandler(w, opts)
 	logger := slog.New(handler)
 	slog.SetDefault(logger)
 
-	conf, err := InitConfig()
+	conf, err := InitConfig(w)
 	if err != nil {
 		return Die(err)
 	}
 
 	if conf.Showversion {
-		fmt.Printf("This is kleingebaeck version %s\n", VERSION)
+		fmt.Fprintf(w, "This is kleingebaeck version %s\n", VERSION)
 		return 0
 	}
 
 	if conf.Showhelp {
-		fmt.Println(Usage)
+		fmt.Fprintln(w, Usage)
 		return 0
 	}
 
@@ -90,7 +91,7 @@ func Main() int {
 		}
 
 		logLevel.Set(slog.LevelDebug)
-		var handler slog.Handler = tint.NewHandler(os.Stdout, opts)
+		handler := tint.NewHandler(w, opts)
 		debuglogger := slog.New(handler).With(
 			slog.Group("program_info",
 				slog.Int("pid", os.Getpid()),
@@ -100,6 +101,8 @@ func Main() int {
 		slog.SetDefault(debuglogger)
 	}
 
+	// defaultlogger := log.Default()
+	// defaultlogger.SetOutput(w)
 	slog.Debug("config", "conf", conf)
 
 	// prepare output dir
@@ -131,10 +134,10 @@ func Main() int {
 		if conf.StatsCountAds == 1 {
 			adstr = "ad"
 		}
-		fmt.Printf("Successfully downloaded %d %s with %d images to %s.\n",
+		fmt.Fprintf(w, "Successfully downloaded %d %s with %d images to %s.\n",
 			conf.StatsCountAds, adstr, conf.StatsCountImages, conf.Outdir)
 	} else {
-		fmt.Printf("No ads found.")
+		fmt.Fprintf(w, "No ads found.")
 	}
 
 	return 0
diff --git a/main_test.go b/main_test.go
new file mode 100644
index 0000000..bceb8af
--- /dev/null
+++ b/main_test.go
@@ -0,0 +1,520 @@
+/*
+Copyright © 2023 Thomas von Dein
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package main
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"os"
+	"strings"
+	"testing"
+	tpl "text/template"
+
+	"github.com/jarcoal/httpmock"
+)
+
+// the ad list, aka:
+// https://www.kleinanzeigen.de/s-bestandsliste.html?userId=XXXXXX
+// Note, that this HTML code is reduced to the max, so that it only
+// contains the stuff required to satisfy goquery
+const LISTTPL string = `<!DOCTYPE html>
+<html lang="de" >
+  <head>
+    <title>Ads</title>
+  </head>
+  <body>
+{{ range . }}
+     <h2 class="text-module-begin">
+        <a class="ellipsis"
+           href="/s-anzeige/{{ .Slug }}/{{ .Id }}">{{ .Title }}</a>
+     </h2>
+{{ end }}
+  </body>
+</html>
+`
+
+// an actual ad listing, aka:
+// https://www.kleinanzeigen.de/s-anzeige/ad-text-slug/1010101010
+// Note, that this HTML code is reduced to the max, so that it only
+// contains the stuff required to satisfy goquery
+const ADTPL string = `DOCTYPE html>
+<html lang="de">
+  <head>
+    <title>Ad Listing</title>
+  </head>
+  <body>
+
+    {{ range $image := .Images }}
+    <div class="galleryimage-element" data-ix="3">
+      <img src="{{ $image }}"/>
+    </div>
+    {{ end }}
+
+    <h1 id="viewad-title" class="boxedarticle--title" itemprop="name" data-soldlabel="Verkauft">
+      {{ .Title }}</h1>
+    <div class="boxedarticle--flex--container">
+      <h2 class="boxedarticle--price" id="viewad-price">
+        {{ .Price }}</h2>
+    </div>
+
+    <div id="viewad-extra-info" class="boxedarticle--details--full">
+      <div><i class="icon icon-small icon-calendar-gray-simple"></i><span>{{ .Created }}</span></div>
+    </div>
+
+    <div class="splitlinebox l-container-row" id="viewad-details">
+      <ul class="addetailslist">
+        <li class="addetailslist--detail">
+          Art<span class="addetailslist--detail--value" >
+          {{ .Category }}</span>
+        </li>
+        <li class="addetailslist--detail">
+          Zustand<span class="addetailslist--detail--value" >
+          {{ .Condition }}</span>
+        </li>
+      </ul>
+    </div>
+
+    <div class="l-container last-paragraph-no-margin-bottom">
+      <p id="viewad-description-text" class="text-force-linebreak " itemprop="description">
+        {{ .Text }}
+      </p>
+    </div>
+  </body>
+</html>
+`
+
+const EMPTYPAGE string = `DOCTYPE html>
+<html lang="de">
+  <head></head>
+  <body></body>
+</html>
+`
+
+const (
+	EMPTYURI       string = `https://www.kleinanzeigen.de/s-anzeige/empty/1`
+	INVALIDPATHURI string = `https://www.kleinanzeigen.de/anzeige/name/1`
+	INVALID404URI  string = `https://www.kleinanzeigen.de/anzeige/name/1/foo/bar`
+	INVALIDURI     string = `https://foo.bar/weird/things`
+)
+
+var base = "kleingebaeck -c t/config-empty.conf"
+
+type Tests struct {
+	name     string
+	args     string
+	expect   string
+	exitcode int
+}
+
+var tests = []Tests{
+	{
+		name:     "version",
+		args:     base + " -V",
+		expect:   "This is",
+		exitcode: 0,
+	},
+	{
+		name:     "help",
+		args:     base + " -h",
+		expect:   "Usage:",
+		exitcode: 0,
+	},
+	{
+		name:     "debug",
+		args:     base + " -d",
+		expect:   "program_info",
+		exitcode: 1,
+	},
+	{
+		name:     "no-args-no-user",
+		args:     base,
+		expect:   "invalid or no user id",
+		exitcode: 1,
+	},
+	{
+		name:     "download-single-ad",
+		args:     base + " -o t/out https://www.kleinanzeigen.de/s-anzeige/first-ad/1",
+		expect:   "Successfully downloaded 1 ad with 2 images to t/out",
+		exitcode: 0,
+	},
+	{
+		name:     "download-single-ad-verbose",
+		args:     base + " -o t/out https://www.kleinanzeigen.de/s-anzeige/first-ad/1 -v",
+		expect:   "wrote ad listing",
+		exitcode: 0,
+	},
+	{
+		name:     "download-single-ad-debug",
+		args:     base + " -o t/out https://www.kleinanzeigen.de/s-anzeige/first-ad/1 -d",
+		expect:   "extracted ad listing program_info.pid=",
+		exitcode: 0,
+	},
+	{
+		name:     "download-all-ads",
+		args:     base + " -o t/out -u 1",
+		expect:   "Successfully downloaded 6 ads with 12 images to t/out",
+		exitcode: 0,
+	},
+	{
+		name:     "download-all-ads-using-config",
+		args:     "kleingebaeck -c t/fullconfig.conf",
+		expect:   "Successfully downloaded 6 ads with 12 images to t/out",
+		exitcode: 0,
+	},
+}
+
+var invalidtests = []Tests{
+	{
+		name:     "empty-ad",
+		args:     base + " " + EMPTYURI,
+		expect:   "could not extract ad data from page, got empty struct",
+		exitcode: 1,
+	},
+	{
+		name:     "invalid-ad",
+		args:     base + " " + INVALIDURI,
+		expect:   "invalid uri",
+		exitcode: 1,
+	},
+	{
+		name:     "invalid-path",
+		args:     base + " " + INVALIDPATHURI,
+		expect:   "could not extract ad data from page, got empty struct",
+		exitcode: 1,
+	},
+	{
+		name:     "404",
+		args:     base + " " + INVALID404URI,
+		expect:   "could not get page via HTTP",
+		exitcode: 1,
+	},
+	{
+		name:     "outdir-no-exists",
+		args:     base + " -o t/foo/bar/out https://www.kleinanzeigen.de/s-anzeige/first-ad/1 -v",
+		expect:   "Failure",
+		exitcode: 1,
+	},
+	{
+		name:     "wrong-flag",
+		args:     base + " -X",
+		expect:   "unknown shorthand flag: 'X' in -X",
+		exitcode: 1,
+	},
+	{
+		name:     "no-config",
+		args:     "kleingebaeck -c t/invalid.conf",
+		expect:   "error loading config file",
+		exitcode: 1,
+	},
+}
+
+type AdConfig struct {
+	Title     string
+	Slug      string
+	Id        string
+	Price     string
+	Category  string
+	Condition string
+	Created   string
+	Text      string
+	Images    []string // files in ./t/
+}
+
+var adsrc = []AdConfig{
+	{
+		Title: "First Ad",
+		Id:    "1", Price: "5€",
+		Category:  "Klimbim",
+		Text:      "Thing to sale",
+		Slug:      "first-ad",
+		Condition: "works",
+		Created:   "Yesterday",
+		Images:    []string{"t/1.jpg", "t/2.jpg"},
+	},
+	{
+		Title: "Secnd Ad",
+		Id:    "2", Price: "5€",
+		Category:  "Kram",
+		Text:      "Thing to sale",
+		Slug:      "second-ad",
+		Condition: "works",
+		Created:   "Yesterday",
+		Images:    []string{"t/1.jpg", "t/2.jpg"},
+	},
+	{
+		Title:     "Third Ad",
+		Id:        "3",
+		Price:     "5€",
+		Category:  "Kuddelmuddel",
+		Text:      "Thing to sale",
+		Slug:      "third-ad",
+		Condition: "works",
+		Created:   "Yesterday",
+		Images:    []string{"t/1.jpg", "t/2.jpg"},
+	},
+	{
+		Title:     "Forth Ad",
+		Id:        "4",
+		Price:     "5€",
+		Category:  "Krempel",
+		Text:      "Thing to sale",
+		Slug:      "fourth-ad",
+		Condition: "works",
+		Created:   "Yesterday",
+		Images:    []string{"t/1.jpg", "t/2.jpg"},
+	},
+	{
+		Title:     "Fifth Ad",
+		Id:        "5",
+		Price:     "5€",
+		Category:  "Kladderadatsch",
+		Text:      "Thing to sale",
+		Slug:      "fifth-ad",
+		Condition: "works",
+		Created:   "Yesterday",
+		Images:    []string{"t/1.jpg", "t/2.jpg"},
+	},
+	{
+		Title:     "Sixth Ad",
+		Id:        "6",
+		Price:     "5€",
+		Category:  "Klunker",
+		Text:      "Thing to sale",
+		Slug:      "sixth-ad",
+		Condition: "works",
+		Created:   "Yesterday",
+		Images:    []string{"t/1.jpg", "t/2.jpg"},
+	},
+}
+
+// An  Adsource  is used  to  construct  a  httpmock responder  for  a
+// particular    url.    So,     the    code    (scrape.go)    scrapes
+// https://kleinanzeigen.de,  but  in  reality httpmock  captures  the
+// request and responds with our mock data
+type Adsource struct {
+	uri     string
+	content string
+	status  int
+}
+
+// Render a HTML template for an adlisting or an ad
+func GetTemplate(l []AdConfig, a AdConfig, htmltemplate string) string {
+	tmpl, err := tpl.New("template").Parse(htmltemplate)
+	if err != nil {
+		panic(err)
+	}
+
+	var out bytes.Buffer
+	if len(a.Id) == 0 {
+		err = tmpl.Execute(&out, l)
+	} else {
+		err = tmpl.Execute(&out, a)
+	}
+
+	if err != nil {
+		panic(err)
+	}
+
+	return out.String()
+}
+
+// Initialize the valid sources for the httpmock responder
+func InitValidSources() []Adsource {
+	// valid ad listing page 1
+	list1 := []AdConfig{
+		adsrc[0], adsrc[1], adsrc[2],
+	}
+
+	// valid ad listing page 2
+	list2 := []AdConfig{
+		adsrc[3], adsrc[4], adsrc[5],
+	}
+
+	// valid ad listing page 3, which is empty
+	list3 := []AdConfig{}
+
+	// used to signal GetTemplate() to render a listing
+	empty := AdConfig{}
+
+	// prepare urls for the listing pages
+	ads := []Adsource{
+		{
+			uri:     fmt.Sprintf("%s%s?userId=1", Baseuri, Listuri),
+			content: GetTemplate(list1, empty, LISTTPL),
+		},
+		{
+			uri:     fmt.Sprintf("%s%s?userId=1&pageNum=2", Baseuri, Listuri),
+			content: GetTemplate(list2, empty, LISTTPL),
+		},
+		{
+			uri:     fmt.Sprintf("%s%s?userId=1&pageNum=3", Baseuri, Listuri),
+			content: GetTemplate(list3, empty, LISTTPL),
+		},
+	}
+
+	// prepare urls for the ads
+	for _, ad := range adsrc {
+		ads = append(ads, Adsource{
+			uri:     fmt.Sprintf("%s/s-anzeige/%s/%s", Baseuri, ad.Slug, ad.Id),
+			content: GetTemplate(nil, ad, ADTPL),
+		})
+		//panic(GetTemplate(nil, ad, ADTPL))
+	}
+
+	return ads
+}
+
+func InitInvalidSources() []Adsource {
+	empty := AdConfig{}
+	ads := []Adsource{
+		{
+			// valid ad page but without content
+			uri:     fmt.Sprintf("%s/s-anzeige/empty/1", Baseuri),
+			content: GetTemplate(nil, empty, EMPTYPAGE),
+		},
+		{
+			// some random foreign webpage
+			uri:     INVALIDURI,
+			content: GetTemplate(nil, empty, "<html>foo</html>"),
+		},
+		{
+			// some invalid page path
+			uri:     fmt.Sprintf("%s/anzeige/name/1", Baseuri),
+			content: GetTemplate(nil, empty, "<html></html>"),
+		},
+		{
+			// some none-ad page
+			uri:     fmt.Sprintf("%s/anzeige/name/1/foo/bar", Baseuri),
+			content: GetTemplate(nil, empty, "<html>HTTP 404: /eine-anzeige/ does not exist!</html>"),
+			status:  404,
+		},
+	}
+
+	return ads
+}
+
+// load a test image from disk
+func GetImage(path string) []byte {
+	dat, err := os.ReadFile(path)
+	if err != nil {
+		panic(err)
+	}
+
+	return dat
+}
+
+// setup httpmock
+func SetIntercept(ads []Adsource) {
+	for _, ad := range ads {
+		if ad.status == 0 {
+			ad.status = 200
+		}
+
+		httpmock.RegisterResponder("GET", ad.uri,
+			httpmock.NewStringResponder(ad.status, ad.content))
+	}
+
+	// we just use 2 images, put this here
+	for _, image := range []string{"t/1.jpg", "t/2.jpg"} {
+		httpmock.RegisterResponder("GET", image, httpmock.NewBytesResponder(200, GetImage(image)))
+	}
+
+}
+
+func VerifyAd(ad AdConfig) error {
+	body := ad.Title + ad.Price + ad.Id + ad.Category + ad.Condition + ad.Created
+
+	file := fmt.Sprintf("t/out/%s/Adlisting.txt", ad.Slug)
+	content, err := os.ReadFile(file)
+	if err != nil {
+		return err
+	}
+
+	if body != strings.TrimSpace(string(content)) {
+		msg := fmt.Sprintf("ad content doesn't match.\nExpect: %s\n   Got: %s\n", body, content)
+		return errors.New(msg)
+	}
+
+	return nil
+}
+
+func TestMain(t *testing.T) {
+	oldargs := os.Args
+	defer func() { os.Args = oldargs }()
+
+	httpmock.Activate()
+	defer httpmock.DeactivateAndReset()
+
+	// prepare httpmock responders
+	SetIntercept(InitValidSources())
+
+	// run commandline tests
+	for _, tt := range tests {
+		var buf bytes.Buffer
+		os.Args = strings.Split(tt.args, " ")
+
+		ret := Main(&buf)
+
+		if ret != tt.exitcode {
+			t.Errorf("%s with cmd <%s> did not exit with %d but %d",
+				tt.name, tt.args, tt.exitcode, ret)
+		}
+
+		if !strings.Contains(buf.String(), tt.expect) {
+			t.Errorf("%s with cmd <%s> output did not match.\nExpect: %s\n   Got: %s\n",
+				tt.name, tt.args, tt.expect, buf.String())
+		}
+	}
+
+	// verify if downloaded ads match
+	for _, ad := range adsrc {
+		if err := VerifyAd(ad); err != nil {
+			t.Errorf(err.Error())
+		}
+	}
+}
+
+func TestMainInvalids(t *testing.T) {
+	oldargs := os.Args
+	defer func() { os.Args = oldargs }()
+
+	httpmock.Activate()
+	defer httpmock.DeactivateAndReset()
+
+	// prepare httpmock responders
+	SetIntercept(InitInvalidSources())
+
+	// run commandline tests
+	for _, tt := range invalidtests {
+		var buf bytes.Buffer
+		os.Args = strings.Split(tt.args, " ")
+
+		ret := Main(&buf)
+
+		if ret != tt.exitcode {
+			t.Errorf("%s with cmd <%s> did not exit with %d but %d",
+				tt.name, tt.args, tt.exitcode, ret)
+		}
+
+		if !strings.Contains(buf.String(), tt.expect) {
+			t.Errorf("%s with cmd <%s> output did not match.\nExpect: %s\n   Got: %s\n",
+				tt.name, tt.args, tt.expect, buf.String())
+		}
+	}
+}
diff --git a/scrape.go b/scrape.go
index 7ab0bfb..25e7d73 100644
--- a/scrape.go
+++ b/scrape.go
@@ -196,7 +196,7 @@ func Getimage(uri, fileName string) error {
 	defer response.Body.Close()
 
 	if response.StatusCode != 200 {
-		return errors.New("received non 200 response code")
+		return errors.New("could not get image via HTTP")
 	}
 
 	err = WriteImage(fileName, response.Body)
diff --git a/scrape_test.go b/scrape_test.go
deleted file mode 100644
index fd3c20f..0000000
--- a/scrape_test.go
+++ /dev/null
@@ -1,345 +0,0 @@
-/*
-Copyright © 2023 Thomas von Dein
-
-This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-package main
-
-import (
-	"bytes"
-	"fmt"
-	"os"
-	"strings"
-	"testing"
-	tpl "text/template"
-
-	"github.com/jarcoal/httpmock"
-)
-
-// used to fill an ad template and the ad listing page template
-type AdConfig struct {
-	Title     string
-	Slug      string
-	Id        string
-	Price     string
-	Category  string
-	Condition string
-	Created   string
-	Text      string
-	Images    []string // files in ./t/
-}
-
-// the ad list, aka:
-// https://www.kleinanzeigen.de/s-bestandsliste.html?userId=XXXXXX
-// Note, that this HTML code is reduced to the max, so that it only
-// contains the stuff required to satisfy goquery
-const LISTTPL string = `<!DOCTYPE html>
-<html lang="de" >
-  <head>
-    <title>Ads</title>
-  </head>
-  <body>
-{{ range . }}
-     <h2 class="text-module-begin">
-        <a class="ellipsis"
-           href="/s-anzeige/{{ .Slug }}/{{ .Id }}">{{ .Title }}</a>
-     </h2>
-{{ end }}
-  </body>
-</html>
-`
-
-// an actual ad listing, aka:
-// https://www.kleinanzeigen.de/s-anzeige/ad-text-slug/1010101010
-// Note, that this HTML code is reduced to the max, so that it only
-// contains the stuff required to satisfy goquery
-const ADTPL string = `DOCTYPE html>
-<html lang="de">
-  <head>
-    <title>Ad Listing</title>
-  </head>
-  <body>
-
-    {{ range $image := .Images }}
-    <div class="galleryimage-element" data-ix="3">
-      <img src="{{ $image }}"/>
-    </div>
-    {{ end }}
-
-    <h1 id="viewad-title" class="boxedarticle--title" itemprop="name" data-soldlabel="Verkauft">
-      {{ .Title }}</h1>
-    <div class="boxedarticle--flex--container">
-      <h2 class="boxedarticle--price" id="viewad-price">
-        {{ .Price }}</h2>
-    </div>
-
-    <div id="viewad-extra-info" class="boxedarticle--details--full">
-      <div><i class="icon icon-small icon-calendar-gray-simple"></i><span>{{ .Created }}</span></div>
-    </div>
-
-    <div class="splitlinebox l-container-row" id="viewad-details">
-      <ul class="addetailslist">
-        <li class="addetailslist--detail">
-          Art<span class="addetailslist--detail--value" >
-          {{ .Category }}</span>
-        </li>
-        <li class="addetailslist--detail">
-          Zustand<span class="addetailslist--detail--value" >
-          {{ .Condition }}</span>
-        </li>
-      </ul>
-    </div>
-
-    <div class="l-container last-paragraph-no-margin-bottom">
-      <p id="viewad-description-text" class="text-force-linebreak " itemprop="description">
-        {{ .Text }}
-      </p>
-    </div>
-  </body>
-</html>
-`
-
-const EMPTYPAGE string = `DOCTYPE html>
-<html lang="de">
-  <head></head>
-  <body></body>
-</html>
-`
-
-const EMPTYURI string = `https://www.kleinanzeigen.de/s-anzeige/empty/1`
-const INVALIDURI string = `https://foo.bar/weird/things`
-
-// An  Adsource  is used  to  construct  a  httpmock responder  for  a
-// particular    url.    So,     the    code    (scrape.go)    scrapes
-// https://kleinanzeigen.de,  but  in  reality httpmock  captures  the
-// request and responds with our mock data
-type Adsource struct {
-	uri     string
-	content string
-	status  int
-}
-
-// Render a HTML template for an adlisting or an ad
-func GetTemplate(l []AdConfig, a AdConfig, htmltemplate string) string {
-	tmpl, err := tpl.New("template").Parse(htmltemplate)
-	if err != nil {
-		panic(err)
-	}
-
-	var out bytes.Buffer
-	if len(a.Id) == 0 {
-		err = tmpl.Execute(&out, l)
-	} else {
-		err = tmpl.Execute(&out, a)
-	}
-
-	if err != nil {
-		panic(err)
-	}
-
-	return out.String()
-}
-
-func InitAds() []AdConfig {
-	return []AdConfig{
-		{Title: "First Ad", Id: "1", Price: "5€", Category: "Klimbim", Text: "Thing to sale", Slug: "first-ad",
-			Condition: "works", Created: "Yesterday", Images: []string{"t/1.jpg", "t/2.jpg"}},
-		{Title: "Secnd Ad", Id: "2", Price: "5€", Category: "Kram", Text: "Thing to sale", Slug: "second-ad",
-			Condition: "works", Created: "Yesterday", Images: []string{"t/1.jpg", "t/2.jpg"}},
-		{Title: "Third Ad", Id: "3", Price: "5€", Category: "Kuddelmuddel", Text: "Thing to sale", Slug: "third-ad",
-			Condition: "works", Created: "Yesterday", Images: []string{"t/1.jpg", "t/2.jpg"}},
-		{Title: "Forth Ad", Id: "4", Price: "5€", Category: "Krempel", Text: "Thing to sale", Slug: "fourth-ad",
-			Condition: "works", Created: "Yesterday", Images: []string{"t/1.jpg", "t/2.jpg"}},
-		{Title: "Fifth Ad", Id: "5", Price: "5€", Category: "Kladderadatsch", Text: "Thing to sale", Slug: "fifth-ad",
-			Condition: "works", Created: "Yesterday", Images: []string{"t/1.jpg", "t/2.jpg"}},
-		{Title: "Sixth Ad", Id: "6", Price: "5€", Category: "Klunker", Text: "Thing to sale", Slug: "sixth-ad",
-			Condition: "works", Created: "Yesterday", Images: []string{"t/1.jpg", "t/2.jpg"}},
-	}
-}
-
-// Initialize the valid sources for the httpmock responder
-func InitValidSources(conf *Config) []Adsource {
-	// all our valid ads
-	adsrc := InitAds()
-
-	// valid ad listing page 1
-	list1 := []AdConfig{
-		adsrc[0], adsrc[1], adsrc[2],
-	}
-
-	// valid ad listing page 2
-	list2 := []AdConfig{
-		adsrc[3], adsrc[4], adsrc[5],
-	}
-
-	// valid ad listing page 3, which is empty
-	list3 := []AdConfig{}
-
-	// used to signal GetTemplate() to render a listing
-	empty := AdConfig{}
-
-	// prepare urls for the listing pages
-	ads := []Adsource{
-		{
-			uri:     fmt.Sprintf("%s%s?userId=%d", Baseuri, Listuri, conf.User),
-			content: GetTemplate(list1, empty, LISTTPL),
-		},
-		{
-			uri:     fmt.Sprintf("%s%s?userId=%d&pageNum=2", Baseuri, Listuri, conf.User),
-			content: GetTemplate(list2, empty, LISTTPL),
-		},
-		{
-			uri:     fmt.Sprintf("%s%s?userId=%d&pageNum=3", Baseuri, Listuri, conf.User),
-			content: GetTemplate(list3, empty, LISTTPL),
-		},
-	}
-
-	// prepare urls for the ads
-	for _, ad := range adsrc {
-		ads = append(ads, Adsource{
-			uri:     fmt.Sprintf("%s/s-anzeige/%s/%s", Baseuri, ad.Slug, ad.Id),
-			content: GetTemplate(nil, ad, ADTPL),
-		})
-		//panic(GetTemplate(nil, ad, ADTPL))
-	}
-
-	return ads
-}
-
-func InitInvalidSources(conf *Config) []Adsource {
-	empty := AdConfig{}
-	ads := []Adsource{
-		{
-			// valid ad page but without content
-			uri:     fmt.Sprintf("%s/s-anzeige/empty/1", Baseuri),
-			content: GetTemplate(nil, empty, EMPTYPAGE),
-		},
-		{
-			// some random foreign webpage
-			uri:     INVALIDURI,
-			content: GetTemplate(nil, empty, "<html>foo</html>"),
-		},
-		{
-			// some invalid page path
-			uri:     fmt.Sprintf("%s/anzeige/name/1", Baseuri),
-			content: GetTemplate(nil, empty, "<html></html>"),
-		},
-		{
-			// some none-ad page
-			uri:     fmt.Sprintf("%s/anzeige/name/1/foo/bar", Baseuri),
-			content: GetTemplate(nil, empty, "<html>HTTP 404: /eine-anzeige/ does not exist!</html>"),
-			status:  404,
-		},
-	}
-
-	return ads
-}
-
-// load a test image from disk
-func GetImage(path string) []byte {
-	dat, err := os.ReadFile(path)
-	if err != nil {
-		panic(err)
-	}
-
-	return dat
-}
-
-// setup httpmock
-func SetIntercept(conf *Config) {
-	ads := InitValidSources(conf)
-	eads := InitInvalidSources(conf)
-
-	ads = append(ads, eads...)
-
-	for _, ad := range ads {
-		if ad.status == 0 {
-			ad.status = 200
-		}
-
-		httpmock.RegisterResponder("GET", ad.uri,
-			httpmock.NewStringResponder(ad.status, ad.content))
-	}
-
-	// we just use 2 images, put this here
-	for _, image := range []string{"t/1.jpg", "t/2.jpg"} {
-		httpmock.RegisterResponder("GET", image, httpmock.NewBytesResponder(200, GetImage(image)))
-	}
-
-}
-
-// the  actual  test, calls  Start()  from  scrape, which  recursively
-// scrapes ads from a user
-func TestStart(t *testing.T) {
-	httpmock.Activate()
-	defer httpmock.DeactivateAndReset()
-
-	// fake config
-	conf := &Config{User: 1, Outdir: "t/out", Template: DefaultTemplate}
-
-	// prepare httpmock responders
-	SetIntercept(conf)
-
-	// run
-	if err := Start(conf); err != nil {
-		t.Errorf("failed to scrape: %s", err.Error())
-	}
-
-	// verify
-	for _, ad := range InitAds() {
-		file := fmt.Sprintf("t/out/%s/Adlisting.txt", ad.Slug)
-		content, err := os.ReadFile(file)
-		if err != nil {
-			t.Errorf("failed to read adlisting: %s", err.Error())
-		}
-
-		if !strings.Contains(string(content), ad.Category) && !strings.Contains(string(content), ad.Title) {
-			t.Errorf("failed to verify: %s content doesn't contain expected data", file)
-		}
-	}
-
-	// uncomment to see slogs
-	//t.Errorf("debug")
-}
-
-func TestSingleFail(t *testing.T) {
-	httpmock.Activate()
-	defer httpmock.DeactivateAndReset()
-
-	// fake config
-	conf := &Config{Outdir: "t/out", Template: DefaultTemplate, Adlinks: []string{EMPTYURI}}
-
-	SetIntercept(conf)
-
-	// check empty ad
-	if err := Scrape(conf, EMPTYURI); err == nil {
-		t.Errorf("scrape returned empty ad")
-	}
-
-	// wrong uri
-	if err := Scrape(conf, INVALIDURI); err == nil {
-		t.Errorf("scrape returned ad from invalid web site")
-	}
-
-	// wrong path
-	if err := Scrape(conf, fmt.Sprintf("%s/anzeige/name/1", Baseuri)); err == nil {
-		t.Errorf("scrape returned ad from invalid page")
-	}
-
-	// wrong path
-	if err := Scrape(conf, fmt.Sprintf("%s/anzeige/name/1/foo/bar", Baseuri)); err == nil {
-		t.Errorf("scrape returned ad from 404 page")
-	}
-}
diff --git a/t/config-empty.conf b/t/config-empty.conf
new file mode 100644
index 0000000..107a152
--- /dev/null
+++ b/t/config-empty.conf
@@ -0,0 +1,6 @@
+# empty config for Main() unit tests to force unit tests NOT to use an
+# eventually existing ~/.kleingebaeck!
+template="""
+{{.Title}}{{.Price}}{{.Id}}{{.Category}}{{.Condition}}{{.Created}}
+"""
+
diff --git a/t/fullconfig.conf b/t/fullconfig.conf
new file mode 100644
index 0000000..9265883
--- /dev/null
+++ b/t/fullconfig.conf
@@ -0,0 +1,6 @@
+user = 1
+loglevel = "verbose"
+outdir = "t/out"
+template="""
+{{.Title}}{{.Price}}{{.Id}}{{.Category}}{{.Condition}}{{.Created}}
+"""
diff --git a/t/invalid.conf b/t/invalid.conf
new file mode 100644
index 0000000..f7b6536
--- /dev/null
+++ b/t/invalid.conf
@@ -0,0 +1 @@
+user = "