Added tests to the spool package, and reworked the code around that.

main.go

@@ -8,13 +8,17 @@ import (
 	"fmt"
 	"log"
 	"os"
+	"path/filepath"
 	"time"
 )
 
+const (
+	spoolFileName = "bareos-zabbix-check.spool"
+)
+
 func main() {
 	var (
 		config        config.Config
-		spool         spool.Spool
 		errorString   string
 		missingString string
 	)
@@ -58,14 +62,24 @@ func main() {
 	// We will check for errors in loading the spool file only at the end. If all jobs ran successfully without errors
 	// in the state file and we manage to write a new spool file without errors, then we will ignore any error here to
 	// avoid false positives during backup bootstrap
-	err = spool.Load(&config)
+	// Open the spool file
+	spoolFile, spoolErr := os.Open(filepath.Join(config.WorkDir(), spoolFileName))
+	var spoolJobs []job.Job
+	if err == nil {
+		defer spoolFile.Close()
+		spoolJobs, spoolErr = spool.Parse(spoolFile)
+	}
 
-	jobs = job.KeepOldestOnly(append(jobs, spool.Jobs()...))
-	spool.SetJobs(job.KeepSuccessOnly(jobs))
+	jobs = job.KeepOldestOnly(append(jobs, spoolJobs...))
 
 	// we write this new spool
-	if err2 := spool.Save(); err2 != nil {
-		fmt.Printf("AVERAGE: Error saving the spool file : %s\n", err2)
+	spoolFile, err = os.Create(filepath.Join(config.WorkDir(), spoolFileName))
+	if err == nil {
+		defer spoolFile.Close()
+		err = spool.Serialize(spoolFile, jobs)
+	}
+	if err != nil {
+		fmt.Printf("AVERAGE: Error saving the spool file : %s\n", err)
 		os.Exit(0)
 	}
 
@@ -91,8 +105,8 @@ func main() {
 	// Finally we output
 	if errorString != "" || missingString != "" {
 		fmt.Printf("AVERAGE: %s %s", errorString, missingString)
-		if err != nil {
-			fmt.Printf(" additionnal errors: %s", err)
+		if spoolErr != nil {
+			fmt.Printf(" additionnal errors: %s", spoolErr)
 		}
 	} else {
 		fmt.Printf("OK")

spool/load.go

@@ -1,40 +0,0 @@
-package spool
-
-import (
-	"bareos-zabbix-check/config"
-	"bareos-zabbix-check/job"
-	"encoding/csv"
-	"fmt"
-	"log"
-	"os"
-	"path/filepath"
-	"strconv"
-)
-
-// Load loads a spool file in path
-func (s *Spool) Load(c *config.Config) (err error) {
-	s.config = c
-	// We read the spool
-	file, err := os.Open(filepath.Join(c.WorkDir(), spoolFile))
-	if err != nil {
-		return fmt.Errorf("Couldn't open spool file, starting from scratch: %s", err)
-	}
-	defer file.Close()
-	lines, err := csv.NewReader(file).ReadAll()
-	if err != nil {
-		return fmt.Errorf("Corrupted spool file, starting from scratch : %s", err)
-	}
-	if c.Verbose() {
-		log.Printf("Spool file content : %v\n", lines)
-	}
-
-	for _, line := range lines {
-		var i int
-		i, err = strconv.Atoi(line[1])
-		if err != nil {
-			return fmt.Errorf("Corrupted spool file : couldn't parse timestamp entry")
-		}
-		s.jobs = append(s.jobs, job.Job{Name: line[0], Timestamp: uint64(i), Success: true})
-	}
-	return
-}

spool/parse.go

@@ -0,0 +1,27 @@
+package spool
+
+import (
+	"bareos-zabbix-check/job"
+	"encoding/csv"
+	"io"
+	"strconv"
+
+	"github.com/pkg/errors"
+)
+
+// Parse parses a spool file
+func Parse(handle io.Reader) (jobs []job.Job, err error) {
+	lines, err := csv.NewReader(handle).ReadAll()
+	if err != nil {
+		return nil, errors.Wrap(err, "Corrupted spool file")
+	}
+	for n := 0; n < len(lines); n++ {
+		line := lines[n]
+		i, err := strconv.Atoi(line[1])
+		if err != nil {
+			return nil, errors.Wrapf(err, "Corrupted spool file : couldn't parse timestamp entry : %s", line[1])
+		}
+		jobs = append(jobs, job.Job{Name: line[0], Timestamp: uint64(i), Success: true})
+	}
+	return
+}

spool/parse_test.go

@@ -0,0 +1,41 @@
+package spool
+
+import (
+	"bareos-zabbix-check/job"
+	"bytes"
+	"io"
+	"reflect"
+	"testing"
+	"testing/iotest"
+)
+
+func TestParse(t *testing.T) {
+	readerError := iotest.TimeoutReader(bytes.NewReader([]byte("\n")))
+	readerCorruptedTimestamp := bytes.NewReader([]byte("test,x"))
+	readerOneJob := bytes.NewReader([]byte("test,1"))
+	type args struct {
+		handle io.Reader
+	}
+	tests := []struct {
+		name     string
+		args     args
+		wantJobs []job.Job
+		wantErr  bool
+	}{
+		{"empty", args{readerError}, nil, true},
+		{"corrupted timestamp", args{readerCorruptedTimestamp}, nil, true},
+		{"one job", args{readerOneJob}, []job.Job{{Name: "test", Timestamp: 1, Success: true}}, false},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			gotJobs, err := Parse(tt.args.handle)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("Parse() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			if !reflect.DeepEqual(gotJobs, tt.wantJobs) {
+				t.Errorf("Parse() = %v, want %v", gotJobs, tt.wantJobs)
+			}
+		})
+	}
+}

spool/save.go

@@ -1,28 +0,0 @@
-package spool
-
-import (
-	"encoding/csv"
-	"fmt"
-	"os"
-	"path/filepath"
-)
-
-// Save writes a spool on the disk
-func (s *Spool) Save() (err error) {
-	file, err := os.Create(filepath.Join(s.config.WorkDir(), spoolFile))
-	if err != nil {
-		return
-	}
-	defer file.Close()
-
-	lines := make([][]string, len(s.jobs))
-	var i int = 0
-	for _, job := range s.jobs {
-		lines[i] = make([]string, 2)
-		lines[i][0] = job.Name
-		lines[i][1] = fmt.Sprintf("%d", job.Timestamp)
-		i++
-	}
-	err = csv.NewWriter(file).WriteAll(lines)
-	return
-}

spool/serialize.go

@@ -0,0 +1,20 @@
+package spool
+
+import (
+	"bareos-zabbix-check/job"
+	"encoding/csv"
+	"fmt"
+	"io"
+)
+
+// Serialize writes a spool on the disk
+func Serialize(handle io.Writer, jobs []job.Job) error {
+	lines := make([][]string, len(jobs))
+	for i := 0; i < len(jobs); i++ {
+		job := jobs[i]
+		lines[i] = make([]string, 2)
+		lines[i][0] = job.Name
+		lines[i][1] = fmt.Sprintf("%d", job.Timestamp)
+	}
+	return csv.NewWriter(handle).WriteAll(lines)
+}

spool/serialize_test.go

@@ -0,0 +1,33 @@
+package spool
+
+import (
+	"bareos-zabbix-check/job"
+	"bytes"
+	"testing"
+)
+
+func TestSerialize(t *testing.T) {
+	type args struct {
+		jobs []job.Job
+	}
+	tests := []struct {
+		name       string
+		args       args
+		wantHandle string
+		wantErr    bool
+	}{
+		{"One job", args{[]job.Job{{Name: "a", Timestamp: 1}}}, "a,1\n", false},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			handle := &bytes.Buffer{}
+			if err := Serialize(handle, tt.args.jobs); (err != nil) != tt.wantErr {
+				t.Errorf("Serialize() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			if gotHandle := handle.String(); gotHandle != tt.wantHandle {
+				t.Errorf("Serialize() = %v, want %v", gotHandle, tt.wantHandle)
+			}
+		})
+	}
+}

spool/spool.go

@@ -1,26 +0,0 @@
-package spool
-
-import (
-	"bareos-zabbix-check/config"
-	"bareos-zabbix-check/job"
-)
-
-const (
-	spoolFile = "bareos-zabbix-check.spool"
-)
-
-// Spool is an object for manipulating a bareos spool file
-type Spool struct {
-	config *config.Config
-	jobs   []job.Job
-}
-
-// Jobs exports a spool to a jobs list
-func (s *Spool) Jobs() []job.Job {
-	return s.jobs
-}
-
-// SetJobs sets a jobs list
-func (s *Spool) SetJobs(jobs []job.Job) {
-	s.jobs = jobs
-}