Added tests to the main package and completely reworked the code around that

job/utils.go

@@ -1,25 +1,32 @@
 package job
 
 // KeepOldestOnly filters a job list and keeps only the most recent entry for a job name
-func KeepOldestOnly(jobs []Job) []Job {
-	tmpMap := make(map[string]Job)
-	for _, elt := range jobs {
-		prev, exists := tmpMap[elt.Name]
-		if !exists || (exists && prev.Timestamp < elt.Timestamp) {
-			tmpMap[elt.Name] = elt
+func KeepOldestOnly(jobs []Job) (results []Job) {
+outerLoop:
+	for i := 0; i < len(jobs); i++ {
+		job := jobs[i]
+		for j := 0; j < len(results); j++ {
+			result := results[j]
+			if result.Name == job.Name {
+				continue outerLoop
+			}
 		}
+		for j := i + 1; j < len(jobs); j++ {
+			sec := jobs[j]
+			if sec.Name == job.Name && sec.Timestamp > job.Timestamp {
+				job = sec
+			}
+		}
+		results = append(results, job)
 	}
-	values := make([]Job, 0, len(tmpMap))
-	for _, value := range tmpMap {
-		values = append(values, value)
-	}
-	return values
+	return 
 }
 
 // KeepSuccessOnly returns only the successful jobs from a job list (suiatble to write a new spool file)
 func KeepSuccessOnly(jobs []Job) (result []Job) {
 	result = make([]Job, 0)
-	for _, job := range jobs {
+	for i := 0; i < len(jobs); i++ {
+		job := jobs[i]
 		if job.Success {
 			result = append(result, job)
 		}

job/utils_test.go

@@ -9,8 +9,13 @@ func TestKeepOldestOnly(t *testing.T) {
 	emptyList := []Job{}
 	oneJob := []Job{{Name: "a", Timestamp: 10, Success: true}}
 	twoJobs := []Job{
-		{Name: "a", Timestamp: 10, Success: true},
 		{Name: "a", Timestamp: 5, Success: true},
+		{Name: "a", Timestamp: 10, Success: true},
+	}
+	threeJobs := []Job{
+		{Name: "a", Timestamp: 5, Success: true},
+		{Name: "a", Timestamp: 10, Success: true},
+		{Name: "a", Timestamp: 8, Success: false},
 	}
 	type args struct {
 		jobs []Job
@@ -20,9 +25,10 @@ func TestKeepOldestOnly(t *testing.T) {
 		args args
 		want []Job
 	}{
-		{"empty list", args{emptyList}, emptyList},
+		{"empty list", args{emptyList}, nil},
 		{"one job", args{oneJob}, oneJob},
 		{"two jobs", args{twoJobs}, oneJob},
+		{"three jobs", args{threeJobs}, oneJob},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {