fix test case

weed/storage/sysstat_test.go

@@ -2,13 +2,14 @@ package storage
 
 import (
 	"fmt"
-	"github.com/stretchr/testify/assert"
 	"testing"
 )
 
 func TestMemoryStat(t *testing.T) {
 	total, free, err := MemoryStat()
-	assert.Nil(t, err)
+	if err != nil {
+		t.Fail()
+	}
 
 	if total <= 0 {
 		println("total", total, "free", free)
@@ -18,7 +19,9 @@ func TestMemoryStat(t *testing.T) {
 
 func TestDiskStat(t *testing.T) {
 	total, free, device, mountPoint, err := DiskStat("..")
-	assert.Nil(t, err)
+	if err != nil {
+		t.Fail()
+	}
 
 	if total <= 0 {
 		println("total", total, "free", free)
@@ -31,7 +34,9 @@ func TestDiskStat(t *testing.T) {
 
 func TestAvgLoad(t *testing.T) {
 	load1, load5, load15, err := LoadStat()
-	assert.Nil(t, err)
+	if err != nil {
+		t.Fail()
+	}
 
 	if load1 <= 0 {
 		println("load1", load1, "load5", load5, "load15", load15)
@@ -41,7 +46,9 @@ func TestAvgLoad(t *testing.T) {
 
 func TestProcessStat(t *testing.T) {
 	name, cpuUsage, rss, err := ProcessStat()
-	assert.Nil(t, err)
+	if err != nil {
+		t.Fail()
+	}
 
 	if rss <= 0 {
 		println("name", name, "cpuUsage", cpuUsage, "RSS", rss)