func parseValues(b []byte) ([]api.Value, error) {
buffer := bytes.NewBuffer(b)
var n uint16
if err := binary.Read(buffer, binary.BigEndian, &n); err != nil {
return nil, err
}
if int(n*9) != buffer.Len() {
return nil, ErrInvalid
}
types := make([]byte, n)
values := make([]api.Value, n)
if _, err := buffer.Read(types); err != nil {
return nil, err
}
for i, typ := range types {
switch typ {
case dsTypeGauge:
var v float64
if err := binary.Read(buffer, binary.LittleEndian, &v); err != nil {
return nil, err
}
values[i] = api.Gauge(v)
case dsTypeDerive:
var v int64
if err := binary.Read(buffer, binary.BigEndian, &v); err != nil {
return nil, err
}
values[i] = api.Derive(v)
case dsTypeCounter:
var v uint64
if err := binary.Read(buffer, binary.BigEndian, &v); err != nil {
return nil, err
}
values[i] = api.Counter(v)
default:
return nil, ErrInvalid
}
}
return values, nil
}
func TestNewName(t *testing.T) {
cases := []struct {
vl api.ValueList
index int
want string
}{
{api.ValueList{
Identifier: api.Identifier{
Plugin: "cpu",
Type: "cpu",
},
DSNames: []string{"value"},
Values: []api.Value{api.Derive(0)},
}, 0, "collectd_cpu"},
{api.ValueList{
Identifier: api.Identifier{
Plugin: "dns",
Type: "dns_qtype",
},
DSNames: []string{"value"},
Values: []api.Value{api.Derive(0)},
}, 0, "collectd_dns_dns_qtype"},
{api.ValueList{
Identifier: api.Identifier{
Plugin: "df",
Type: "df",
},
DSNames: []string{"used", "free"},
Values: []api.Value{api.Gauge(0), api.Gauge(1)},
}, 0, "collectd_df_used"},
{api.ValueList{
Identifier: api.Identifier{
Plugin: "df",
Type: "df",
},
DSNames: []string{"used", "free"},
Values: []api.Value{api.Gauge(0), api.Gauge(1)},
}, 1, "collectd_df_free"},
{api.ValueList{
Identifier: api.Identifier{
Plugin: "cpu",
Type: "percent",
},
DSNames: []string{"value"},
Values: []api.Value{api.Gauge(0)},
}, 0, "collectd_cpu_percent"},
{api.ValueList{
Identifier: api.Identifier{
Plugin: "interface",
Type: "if_octets",
},
DSNames: []string{"rx", "tx"},
Values: []api.Value{api.Counter(0), api.Counter(1)},
}, 0, "collectd_interface_if_octets_rx_total"},
{api.ValueList{
Identifier: api.Identifier{
Plugin: "interface",
Type: "if_octets",
},
DSNames: []string{"rx", "tx"},
Values: []api.Value{api.Counter(0), api.Counter(1)},
}, 1, "collectd_interface_if_octets_tx_total"},
}
for _, c := range cases {
got := newName(c.vl, c.index)
if got != c.want {
t.Errorf("newName(%v): got %q, want %q", c.vl, got, c.want)
}
}
}