diff --git a/pkg/controllers/garbagecollector/garbagecollector_test.go b/pkg/controllers/garbagecollector/garbagecollector_test.go
new file mode 100644
index 00000000000..698af4181f1
--- /dev/null
+++ b/pkg/controllers/garbagecollector/garbagecollector_test.go
@@ -0,0 +1,381 @@
+/*
+Copyright 2019 The Volcano Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package garbagecollector
+
+import (
+	"fmt"
+	"testing"
+	"time"
+
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+
+	"volcano.sh/volcano/pkg/apis/batch/v1alpha1"
+	volcanoclient "volcano.sh/volcano/pkg/client/clientset/versioned/fake"
+)
+
+func TestGarbageCollector_ProcessJob(t *testing.T) {
+
+}
+
+func TestGarbageCollector_ProcessTTL(t *testing.T) {
+	namespace := "test"
+	var ttlSecond int32 = 3
+	var ttlSecondZero int32
+	testcases := []struct {
+		Name        string
+		Job         *v1alpha1.Job
+		ExpectedVal bool
+		ExpectedErr error
+	}{
+		{
+			Name: "False Case",
+			Job: &v1alpha1.Job{
+				ObjectMeta: metav1.ObjectMeta{
+					Name:      "job1",
+					Namespace: namespace,
+				},
+				Spec: v1alpha1.JobSpec{
+					TTLSecondsAfterFinished: &ttlSecond,
+				},
+				Status: v1alpha1.JobStatus{
+					State: v1alpha1.JobState{
+						LastTransitionTime: metav1.NewTime(time.Now()),
+						Phase:              v1alpha1.Completed,
+					},
+				},
+			},
+			ExpectedVal: false,
+			ExpectedErr: nil,
+		},
+		{
+			Name: "True Case",
+			Job: &v1alpha1.Job{
+				ObjectMeta: metav1.ObjectMeta{
+					Name:      "job1",
+					Namespace: namespace,
+				},
+				Spec: v1alpha1.JobSpec{
+					TTLSecondsAfterFinished: &ttlSecondZero,
+				},
+				Status: v1alpha1.JobStatus{
+					State: v1alpha1.JobState{
+						LastTransitionTime: metav1.NewTime(time.Now()),
+						Phase:              v1alpha1.Completed,
+					},
+				},
+			},
+			ExpectedVal: true,
+			ExpectedErr: nil,
+		},
+	}
+	for i, testcase := range testcases {
+		gc := New(volcanoclient.NewSimpleClientset())
+
+		expired, err := gc.processTTL(testcase.Job)
+		if err != nil {
+			t.Error("Did not expect error")
+		}
+		if expired != testcase.ExpectedVal {
+			t.Errorf("Expected Return Value to be %t, but got %t in case %d", testcase.ExpectedVal, expired, i)
+		}
+	}
+}
+
+func TestGarbageCollector_NeedsCleanup(t *testing.T) {
+	namespace := "test"
+
+	var ttlSecond int32 = 3
+
+	testcases := []struct {
+		Name        string
+		Job         *v1alpha1.Job
+		ExpectedVal bool
+	}{
+		{
+			Name: "Success Case",
+			Job: &v1alpha1.Job{
+				ObjectMeta: metav1.ObjectMeta{
+					Name:      "job1",
+					Namespace: namespace,
+				},
+				Spec: v1alpha1.JobSpec{
+					TTLSecondsAfterFinished: &ttlSecond,
+				},
+				Status: v1alpha1.JobStatus{
+					State: v1alpha1.JobState{
+						Phase: v1alpha1.Completed,
+					},
+				},
+			},
+			ExpectedVal: true,
+		},
+		{
+			Name: "Failure Case",
+			Job: &v1alpha1.Job{
+				ObjectMeta: metav1.ObjectMeta{
+					Name:      "job1",
+					Namespace: namespace,
+				},
+				Spec: v1alpha1.JobSpec{
+					TTLSecondsAfterFinished: &ttlSecond,
+				},
+				Status: v1alpha1.JobStatus{
+					State: v1alpha1.JobState{
+						Phase: v1alpha1.Running,
+					},
+				},
+			},
+			ExpectedVal: false,
+		},
+	}
+
+	for i, testcase := range testcases {
+		finished := needsCleanup(testcase.Job)
+		if finished != testcase.ExpectedVal {
+			t.Errorf("Expected value to be %t, but got: %t in case %d", testcase.ExpectedVal, finished, i)
+		}
+	}
+}
+
+func TestGarbageCollector_IsJobFinished(t *testing.T) {
+	namespace := "test"
+
+	testcases := []struct {
+		Name        string
+		Job         *v1alpha1.Job
+		ExpectedVal bool
+	}{
+		{
+			Name: "True Case",
+			Job: &v1alpha1.Job{
+				ObjectMeta: metav1.ObjectMeta{
+					Name:      "job1",
+					Namespace: namespace,
+				},
+				Status: v1alpha1.JobStatus{
+					State: v1alpha1.JobState{
+						Phase: v1alpha1.Completed,
+					},
+				},
+			},
+			ExpectedVal: true,
+		},
+		{
+			Name: "False Case",
+			Job: &v1alpha1.Job{
+				ObjectMeta: metav1.ObjectMeta{
+					Name:      "job1",
+					Namespace: namespace,
+				},
+				Status: v1alpha1.JobStatus{
+					State: v1alpha1.JobState{
+						Phase: v1alpha1.Running,
+					},
+				},
+			},
+			ExpectedVal: false,
+		},
+	}
+
+	for i, testcase := range testcases {
+		finished := isJobFinished(testcase.Job)
+		if finished != testcase.ExpectedVal {
+			t.Errorf("Expected value to be %t, but got: %t in case %d", testcase.ExpectedVal, finished, i)
+		}
+	}
+}
+
+func TestGarbageCollector_GetFinishAndExpireTime(t *testing.T) {
+	namespace := "test"
+
+	var ttlSecond int32 = 3
+	var ttlSecondFail int32 = 2
+
+	testTime := time.Date(1, 1, 1, 1, 1, 1, 0, time.UTC)
+
+	testcases := []struct {
+		Name        string
+		Job         *v1alpha1.Job
+		ExpectedErr error
+	}{
+		{
+			Name: "Success case",
+			Job: &v1alpha1.Job{
+				ObjectMeta: metav1.ObjectMeta{
+					Name:      "job1",
+					Namespace: namespace,
+				},
+				Spec: v1alpha1.JobSpec{
+					TTLSecondsAfterFinished: &ttlSecond,
+				},
+				Status: v1alpha1.JobStatus{
+					State: v1alpha1.JobState{
+						Phase:              v1alpha1.Completed,
+						LastTransitionTime: metav1.NewTime(testTime),
+					},
+				},
+			},
+			ExpectedErr: nil,
+		},
+		{
+			Name: "Failure case",
+			Job: &v1alpha1.Job{
+				ObjectMeta: metav1.ObjectMeta{
+					Name:      "job1",
+					Namespace: namespace,
+				},
+				Spec: v1alpha1.JobSpec{
+					TTLSecondsAfterFinished: &ttlSecondFail,
+				},
+				Status: v1alpha1.JobStatus{
+					State: v1alpha1.JobState{
+						Phase:              v1alpha1.Completed,
+						LastTransitionTime: metav1.NewTime(testTime),
+					},
+				},
+			},
+			ExpectedErr: nil,
+		},
+	}
+
+	for i, testcase := range testcases {
+		finishTime, expireTime, err := getFinishAndExpireTime(testcase.Job)
+		if err != nil && err.Error() != testcase.ExpectedErr.Error() {
+			t.Errorf("Expected Error to be: %s but got: %s in case %d", testcase.ExpectedErr, err, i)
+		}
+
+		if finishTime != nil && metav1.NewTime(*finishTime) != testcase.Job.Status.State.LastTransitionTime {
+			t.Errorf("Expected value to be: %v, but got: %v in case %d", testcase.Job.Status.State.LastTransitionTime, metav1.NewTime(*finishTime), i)
+		}
+
+		if expireTime != nil && metav1.NewTime(*expireTime) != metav1.NewTime(testcase.Job.Status.State.LastTransitionTime.Add(time.Duration(*testcase.Job.Spec.TTLSecondsAfterFinished)*time.Second)) {
+			t.Errorf("Expected value to be: %v, but got: %v in case %d", testcase.Job.Status.State.LastTransitionTime.Add(time.Duration(*testcase.Job.Spec.TTLSecondsAfterFinished)*time.Second), metav1.NewTime(*expireTime), i)
+		}
+	}
+}
+
+func TestGarbageCollector_TimeLeft(t *testing.T) {
+	namespace := "test"
+
+	var ttlSecond int32 = 3
+
+	testTime := time.Date(1, 1, 1, 1, 1, 1, 0, time.UTC)
+
+	testcases := []struct {
+		Name        string
+		Job         *v1alpha1.Job
+		Time        *time.Time
+		ExpectedVal time.Duration
+		ExpectedErr error
+	}{
+		{
+			Name: "Success Case",
+			Job: &v1alpha1.Job{
+				ObjectMeta: metav1.ObjectMeta{
+					Name:      "job1",
+					Namespace: namespace,
+				},
+				Spec: v1alpha1.JobSpec{
+					TTLSecondsAfterFinished: &ttlSecond,
+				},
+				Status: v1alpha1.JobStatus{
+					State: v1alpha1.JobState{
+						Phase:              v1alpha1.Completed,
+						LastTransitionTime: metav1.NewTime(testTime),
+					},
+				},
+			},
+			Time:        &testTime,
+			ExpectedVal: time.Duration(3),
+			ExpectedErr: nil,
+		},
+		{
+			Name: "Failure Case",
+			Job: &v1alpha1.Job{
+				ObjectMeta: metav1.ObjectMeta{
+					Name:      "job1",
+					Namespace: namespace,
+				},
+				Spec: v1alpha1.JobSpec{
+					TTLSecondsAfterFinished: &ttlSecond,
+				},
+				Status: v1alpha1.JobStatus{
+					State: v1alpha1.JobState{
+						LastTransitionTime: metav1.NewTime(testTime),
+					},
+				},
+			},
+			Time:        &testTime,
+			ExpectedVal: time.Duration(3),
+			ExpectedErr: fmt.Errorf("job %s/%s should not be cleaned up", "test", "job1"),
+		},
+	}
+
+	for i, testcase := range testcases {
+		timeDuration, err := timeLeft(testcase.Job, testcase.Time)
+		if err != nil && err.Error() != testcase.ExpectedErr.Error() {
+			t.Errorf("Expected Error to be: %s but got: %s in case %d", testcase.ExpectedErr, err, i)
+		}
+
+		if timeDuration != nil && timeDuration.Seconds() != float64(testcase.ExpectedVal*time.Second)/1e9 {
+			t.Errorf("Expected Value to be: %v but got: %f in case %d", testcase.ExpectedVal, timeDuration.Seconds(), i)
+		}
+	}
+}
+
+func TestGarbageCollector_JobFinishTime(t *testing.T) {
+	namespace := "test"
+
+	testcases := []struct {
+		Name        string
+		Job         *v1alpha1.Job
+		ExpectedVal error
+	}{
+		{
+			Name: "Success Case",
+			Job: &v1alpha1.Job{
+				ObjectMeta: metav1.ObjectMeta{
+					Name:      "job1",
+					Namespace: namespace,
+				},
+				Status: v1alpha1.JobStatus{
+					State: v1alpha1.JobState{
+						LastTransitionTime: metav1.NewTime(time.Now()),
+					},
+				},
+			},
+			ExpectedVal: nil,
+		},
+		{
+			Name: "Failure Case",
+			Job: &v1alpha1.Job{
+				ObjectMeta: metav1.ObjectMeta{
+					Name:      "job1",
+					Namespace: namespace,
+				},
+			},
+			ExpectedVal: fmt.Errorf("unable to find the time when the Job %s/%s finished", "test", "job1"),
+		},
+	}
+
+	for i, testcase := range testcases {
+		_, err := jobFinishTime(testcase.Job)
+		if err != nil && err.Error() != testcase.ExpectedVal.Error() {
+			t.Errorf("Expected Error to be: %s but got: %s in case %d", testcase.ExpectedVal, err, i)
+		}
+	}
+}