Vendor psutils and remove neko

plugins/system/ps/mem/mem_test.go

@@ -0,0 +1,55 @@
+package mem
+
+import (
+	"fmt"
+	"testing"
+)
+
+func TestVirtual_memory(t *testing.T) {
+	v, err := VirtualMemory()
+	if err != nil {
+		t.Errorf("error %v", err)
+	}
+	empty := &VirtualMemoryStat{}
+	if v == empty {
+		t.Errorf("error %v", v)
+	}
+}
+
+func TestSwap_memory(t *testing.T) {
+	v, err := SwapMemory()
+	if err != nil {
+		t.Errorf("error %v", err)
+	}
+	empty := &SwapMemoryStat{}
+	if v == empty {
+		t.Errorf("error %v", v)
+	}
+}
+
+func TestVirtualMemoryStat_String(t *testing.T) {
+	v := VirtualMemoryStat{
+		Total:       10,
+		Available:   20,
+		Used:        30,
+		UsedPercent: 30.1,
+		Free:        40,
+	}
+	e := `{"total":10,"available":20,"used":30,"used_percent":30.1,"free":40,"active":0,"inactive":0,"buffers":0,"cached":0,"wired":0,"shared":0}`
+	if e != fmt.Sprintf("%v", v) {
+		t.Errorf("VirtualMemoryStat string is invalid: %v", v)
+	}
+}
+
+func TestSwapMemoryStat_String(t *testing.T) {
+	v := SwapMemoryStat{
+		Total:       10,
+		Used:        30,
+		Free:        40,
+		UsedPercent: 30.1,
+	}
+	e := `{"total":10,"used":30,"free":40,"used_percent":30.1,"sin":0,"sout":0}`
+	if e != fmt.Sprintf("%v", v) {
+		t.Errorf("SwapMemoryStat string is invalid: %v", v)
+	}
+}