chore: fix tests

internal/api/httpinvoce/controller.go

@@ -5,7 +5,6 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
-	"log"
 	"net/http"
 	"time"
 
@@ -19,26 +18,24 @@ func (s Service) createInvoice(w http.ResponseWriter, r *http.Request) {
 
 	err := json.NewDecoder(r.Body).Decode(&req)
 	if err != nil {
-		s.sendErrf(w, http.StatusBadRequest, "cannot read body: %v", err)
+		s.sendErr(w, http.StatusBadRequest, "cannot read body")
 		return
 	}
 
 	repos, err := req.GetRepos()
 	if err != nil {
-		s.sendErr(w, 500, err.Error())
+		s.sendErr(w, http.StatusInternalServerError, "cannot get repos")
 		return
 	}
 
 	invoice, report, err := s.invoice.Generate(req.Creditor, req.Debtor, time.Duration(req.DurationThreshold), req.HourlyRate, repos)
 	if err != nil {
-		log.Println("error while processing invoice:", err)
-		fmt.Fprint(w, "internal server error")
-		w.WriteHeader(http.StatusInternalServerError)
+		s.sendErr(w, http.StatusInternalServerError, "internal server error")
 		return
 	}
 	// if no time has to be billed aka if bill for 0 CHF
 	if report.Total() <= time.Duration(0) {
-		s.sendErr(w, http.StatusNotFound, "no suitable issues to be billed")
+		s.sendErrf(w, http.StatusNotFound, "no suitable issues to be billed")
 		return
 	}