fix test

Author: wxiaoguang

tests/integration/api_issue_milestone_test.go

@@ -7,7 +7,6 @@ import (
 	"fmt"
 	"net/http"
 	"testing"
-	"time"
 
 	auth_model "code.gitea.io/gitea/models/auth"
 	issues_model "code.gitea.io/gitea/models/issues"
@@ -60,15 +59,15 @@ func TestAPIIssuesMilestone(t *testing.T) {
 	DecodeJSON(t, resp, &apiMilestone)
 	assert.Equal(t, "wow", apiMilestone.Title)
 	assert.Equal(t, structs.StateClosed, apiMilestone.State)
-	assert.Equal(t, (*time.Time)(nil), apiMilestone.Deadline)
+	assert.Nil(t, apiMilestone.Deadline)
 
 	var apiMilestones []structs.Milestone
 	req = NewRequest(t, "GET", fmt.Sprintf("/api/v1/repos/%s/%s/milestones?state=%s", owner.Name, repo.Name, "all")).
 		AddTokenAuth(token)
 	resp = MakeRequest(t, req, http.StatusOK)
 	DecodeJSON(t, resp, &apiMilestones)
 	assert.Len(t, apiMilestones, 4)
-	assert.Equal(t, (*time.Time)(nil), apiMilestones[0].Deadline)
+	assert.Nil(t, apiMilestones[0].Deadline)
 
 	req = NewRequest(t, "GET", fmt.Sprintf("/api/v1/repos/%s/%s/milestones/%s", owner.Name, repo.Name, apiMilestones[2].Title)).
 		AddTokenAuth(token)