fix netsh checkIPExists in Chinese

Signed-off-by: sakeven <jc5930@sina.cn>

pkg/util/netsh/netsh.go

@@ -190,9 +190,8 @@ func checkIPExists(ipToCheck string, args []string, runner *runner) (bool, error
 	glog.V(3).Infof("Searching for IP: %v in IP dump: %v", ipToCheck, ipAddressString)
 	showAddressArray := strings.Split(ipAddressString, "\n")
 	for _, showAddress := range showAddressArray {
-		if strings.Contains(showAddress, "IP Address:") {
+		if strings.Contains(showAddress, "IP") {
-			ipFromNetsh := strings.TrimLeft(showAddress, "IP Address:")
+			ipFromNetsh := getIP(showAddress)
-			ipFromNetsh = strings.TrimSpace(ipFromNetsh)
 			if ipFromNetsh == ipToCheck {
 				return true, nil
 			}
@@ -201,3 +200,12 @@ func checkIPExists(ipToCheck string, args []string, runner *runner) (bool, error
 
 	return false, nil
 }
+
+// getIP gets ip from showAddress (e.g. "IP Address: 10.96.0.4").
+func getIP(showAddress string) string {
+	list := strings.SplitN(showAddress, ":", 2)
+	if len(list) != 2 {
+		return ""
+	}
+	return strings.TrimSpace(list[1])
+}

pkg/util/netsh/netsh_test.go

@@ -438,3 +438,30 @@ func TestCheckIPExists(t *testing.T) {
 		}
 	}
 }
+
+func TestGetIP(t *testing.T) {
+	testcases := []struct {
+		showAddress   string
+		expectAddress string
+	}{
+		{
+			showAddress:   "IP 地址:                           10.96.0.2",
+			expectAddress: "10.96.0.2",
+		},
+		{
+			showAddress:   "IP Address:                           10.96.0.3",
+			expectAddress: "10.96.0.3",
+		},
+		{
+			showAddress:   "IP Address:10.96.0.4",
+			expectAddress: "10.96.0.4",
+		},
+	}
+
+	for _, tc := range testcases {
+		address := getIP(tc.showAddress)
+		if address != tc.expectAddress {
+			t.Errorf("expected address=%q, got %q", tc.expectAddress, address)
+		}
+	}
+}