add Inode test and go fmt

disk.go

@@ -5,14 +5,14 @@ import (
 )
 
 type DiskUsageStat struct {
-	Path        string  `json:"path"`
-	Total       uint64  `json:"total"`
-	Free        uint64  `json:"free"`
-	Used        uint64  `json:"used"`
-	UsedPercent float64 `json:"usedPercent"`
-	InodesTotal uint64 `json:"inodesTotal"`
-	InodesUsed uint64 `json:"inodesUsed"`
-	InodesFree uint64 `json:"inodesFree"`
+	Path              string  `json:"path"`
+	Total             uint64  `json:"total"`
+	Free              uint64  `json:"free"`
+	Used              uint64  `json:"used"`
+	UsedPercent       float64 `json:"usedPercent"`
+	InodesTotal       uint64  `json:"inodesTotal"`
+	InodesUsed        uint64  `json:"inodesUsed"`
+	InodesFree        uint64  `json:"inodesFree"`
 	InodesUsedPercent float64 `json:"inodesUsedPercent"`
 }
 

disk_test.go

@@ -48,13 +48,17 @@ func TestDisk_io_counters(t *testing.T) {
 
 func TestDiskUsageStat_String(t *testing.T) {
 	v := DiskUsageStat{
-		Path:        "/",
-		Total:       1000,
-		Free:        2000,
-		Used:        3000,
-		UsedPercent: 50.1,
+		Path:              "/",
+		Total:             1000,
+		Free:              2000,
+		Used:              3000,
+		UsedPercent:       50.1,
+		InodesTotal:       4000,
+		InodesUsed:        5000,
+		InodesFree:        6000,
+		InodesUsedPercent: 49.1,
 	}
-	e := `{"path":"/","total":1000,"free":2000,"used":3000,"usedPercent":50.1}`
+	e := `{"path":"/","total":1000,"free":2000,"used":3000,"usedPercent":50.1,"inodesTotal":4000,"inodesUsed":5000,"inodesFree":6000,"inodesUsedPercent":49.1}`
 	if e != fmt.Sprintf("%v", v) {
 		t.Errorf("DiskUsageStat string is invalid: %v", v)
 	}

disk_unix.go

@@ -14,11 +14,11 @@ func DiskUsage(path string) (*DiskUsageStat, error) {
 	bsize := stat.Bsize / 512
 
 	ret := &DiskUsageStat{
-		Path:  path,
-		Total: (uint64(stat.Blocks) * uint64(bsize)) >> 1,
-		Free:  (uint64(stat.Bfree) * uint64(bsize)) >> 1,
+		Path:        path,
+		Total:       (uint64(stat.Blocks) * uint64(bsize)) >> 1,
+		Free:        (uint64(stat.Bfree) * uint64(bsize)) >> 1,
 		InodesTotal: (uint64(stat.Files)),
-		InodesFree: (uint64(stat.Ffree)),
+		InodesFree:  (uint64(stat.Ffree)),
 	}
 
 	ret.InodesUsed = (ret.InodesTotal - ret.InodesFree)