Add UT cases for new added code

Signed-off-by: Steven Zou <szou@vmware.com>

src/jobservice/pool/de_duplicator.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"strings"
 
+	"github.com/goharbor/harbor/src/jobservice/errs"
 	"github.com/goharbor/harbor/src/jobservice/models"
 	"github.com/goharbor/harbor/src/jobservice/utils"
 	"github.com/gomodule/redigo/redis"
@@ -16,29 +17,53 @@ import (
 // Once a job is declared to be unique, the job can be enqueued only if
 // no same job (same job name and parameters) in the queue or running in progress.
 // Adopt the same unique mechanism with the upstream framework.
-type DeDuplicator struct {
+type DeDuplicator interface {
+	// Check the uniqueness of the unique job and set the unique flag if it is not set yet.
+	//
+	// Parameters:
+	//  jobName string           : name of the job
+	//  params models.Parameters : parameters of the job
+	//
+	// Returns:
+	//  If no unique flag and successfully set it, a nil error is returned;
+	//  otherwise, a non nil error is returned.
+	Unique(jobName string, params models.Parameters) error
+
+	// Remove the unique flag after job exiting
+	// Parameters:
+	//  jobName string           : name of the job
+	//  params models.Parameters : parameters of the job
+	//
+	// Returns:
+	//  If unique flag is successfully removed, a nil error is returned;
+	//  otherwise, a non nil error is returned.
+	DelUniqueSign(jobName string, params models.Parameters) error
+}
+
+// RedisDeDuplicator implement the DeDuplicator interface based on redis.
+type RedisDeDuplicator struct {
 	// Redis namespace
 	namespace string
 	// Redis conn pool
 	pool *redis.Pool
 }
 
-// NewDeDuplicator is constructor of DeDuplicator
+// NewRedisDeDuplicator is constructor of RedisDeDuplicator
-func NewDeDuplicator(ns string, pool *redis.Pool) *DeDuplicator {
+func NewRedisDeDuplicator(ns string, pool *redis.Pool) *RedisDeDuplicator {
-	return &DeDuplicator{
+	return &RedisDeDuplicator{
 		namespace: ns,
 		pool:      pool,
 	}
 }
 
 // Unique checks if the job is unique and set unique flag if it is not set yet.
-func (dd *DeDuplicator) Unique(jobName string, params models.Parameters) error {
+func (rdd *RedisDeDuplicator) Unique(jobName string, params models.Parameters) error {
-	uniqueKey, err := redisKeyUniqueJob(dd.namespace, jobName, params)
+	uniqueKey, err := redisKeyUniqueJob(rdd.namespace, jobName, params)
 	if err != nil {
 		return fmt.Errorf("unique job error: %s", err)
 	}
 
-	conn := dd.pool.Get()
+	conn := rdd.pool.Get()
 	defer conn.Close()
 
 	args := []interface{}{
@@ -50,21 +75,29 @@ func (dd *DeDuplicator) Unique(jobName string, params models.Parameters) error {
 	}
 
 	res, err := redis.String(conn.Do("SET", args...))
-	if err == nil && strings.ToUpper(res) == "OK" {
+	if err == redis.ErrNil {
-		return nil
+		return errs.ConflictError(uniqueKey)
 	}
 
-	return errors.New("unique job error: duplicated")
+	if err == nil {
+		if strings.ToUpper(res) == "OK" {
+			return nil
+		}
+
+		return errors.New("unique job error: missing 'OK' reply")
+	}
+
+	return err
 }
 
 // DelUniqueSign delete the job unique sign
-func (dd *DeDuplicator) DelUniqueSign(jobName string, params models.Parameters) error {
+func (rdd *RedisDeDuplicator) DelUniqueSign(jobName string, params models.Parameters) error {
-	uniqueKey, err := redisKeyUniqueJob(dd.namespace, jobName, params)
+	uniqueKey, err := redisKeyUniqueJob(rdd.namespace, jobName, params)
 	if err != nil {
 		return fmt.Errorf("delete unique job error: %s", err)
 	}
 
-	conn := dd.pool.Get()
+	conn := rdd.pool.Get()
 	defer conn.Close()
 
 	if _, err := conn.Do("DEL", uniqueKey); err != nil {

src/jobservice/pool/de_duplicator_test.go

@@ -0,0 +1,28 @@
+package pool
+
+import (
+	"testing"
+
+	"github.com/goharbor/harbor/src/jobservice/tests"
+)
+
+func TestDeDuplicator(t *testing.T) {
+	jobName := "fake_job"
+	jobParams := map[string]interface{}{
+		"image": "ubuntu:latest",
+	}
+
+	rdd := NewRedisDeDuplicator(tests.GiveMeTestNamespace(), rPool)
+
+	if err := rdd.Unique(jobName, jobParams); err != nil {
+		t.Error(err)
+	}
+
+	if err := rdd.Unique(jobName, jobParams); err == nil {
+		t.Errorf("expect duplicated error but got nil error")
+	}
+
+	if err := rdd.DelUniqueSign(jobName, jobParams); err != nil {
+		t.Error(err)
+	}
+}

src/jobservice/pool/redis_job_wrapper.go

@@ -37,11 +37,11 @@ type RedisJob struct {
 	job          interface{}         // the real job implementation
 	context      *env.Context        // context
 	statsManager opm.JobStatsManager // job stats manager
-	deDuplicator *DeDuplicator       // handle unique job
+	deDuplicator DeDuplicator        // handle unique job
 }
 
 // NewRedisJob is constructor of RedisJob
-func NewRedisJob(j interface{}, ctx *env.Context, statsManager opm.JobStatsManager, deDuplicator *DeDuplicator) *RedisJob {
+func NewRedisJob(j interface{}, ctx *env.Context, statsManager opm.JobStatsManager, deDuplicator DeDuplicator) *RedisJob {
 	return &RedisJob{
 		job:          j,
 		context:      ctx,

src/jobservice/pool/redis_job_wrapper_test.go

@@ -50,7 +50,8 @@ func TestJobWrapper(t *testing.T) {
 		WG:            &sync.WaitGroup{},
 		ErrorChan:     make(chan error, 1), // with 1 buffer
 	}
-	wrapper := NewRedisJob((*fakeParentJob)(nil), envContext, mgr)
+	deDuplicator := NewRedisDeDuplicator(tests.GiveMeTestNamespace(), rPool)
+	wrapper := NewRedisJob((*fakeParentJob)(nil), envContext, mgr, deDuplicator)
 	j := &work.Job{
 		ID:         "FAKE",
 		Name:       "DEMO",

src/jobservice/pool/redis_pool.go

@@ -59,7 +59,7 @@ type GoCraftWorkPool struct {
 	scheduler     period.Interface
 	statsManager  opm.JobStatsManager
 	messageServer *MessageServer
-	deDuplicator  *DeDuplicator
+	deDuplicator  DeDuplicator
 
 	// no need to sync as write once and then only read
 	// key is name of known job
@@ -80,7 +80,7 @@ func NewGoCraftWorkPool(ctx *env.Context, namespace string, workerCount uint, re
 	scheduler := period.NewRedisPeriodicScheduler(ctx, namespace, redisPool, statsMgr)
 	sweeper := period.NewSweeper(namespace, redisPool, client)
 	msgServer := NewMessageServer(ctx.SystemContext, namespace, redisPool)
-	deDepulicator := NewDeDuplicator(namespace, redisPool)
+	deDepulicator := NewRedisDeDuplicator(namespace, redisPool)
 	return &GoCraftWorkPool{
 		namespace:     namespace,
 		redisPool:     redisPool,