Exemple #1
0
func TestWriteValueList(t *testing.T) {
	b := NewBuffer(0)

	vl := api.ValueList{
		Identifier: api.Identifier{
			Host:   "example.com",
			Plugin: "golang",
			Type:   "gauge",
		},
		Time:     time.Unix(1426076671, 123000000), // Wed Mar 11 13:24:31 CET 2015
		Interval: 10 * time.Second,
		Values:   []api.Value{api.Derive(1)},
	}

	if err := b.Write(vl); err != nil {
		t.Errorf("Write got %v, want nil", err)
		return
	}

	// ValueList with much the same fields, to test compression.
	vl = api.ValueList{
		Identifier: api.Identifier{
			Host:           "example.com",
			Plugin:         "golang",
			PluginInstance: "test",
			Type:           "gauge",
		},
		Time:     time.Unix(1426076681, 234000000), // Wed Mar 11 13:24:41 CET 2015
		Interval: 10 * time.Second,
		Values:   []api.Value{api.Derive(2)},
	}

	if err := b.Write(vl); err != nil {
		t.Errorf("Write got %v, want nil", err)
		return
	}

	want := []byte{
		// vl1
		0, 0, 0, 16, 'e', 'x', 'a', 'm', 'p', 'l', 'e', '.', 'c', 'o', 'm', 0,
		0, 2, 0, 11, 'g', 'o', 'l', 'a', 'n', 'g', 0,
		0, 4, 0, 10, 'g', 'a', 'u', 'g', 'e', 0,
		// 1426076671.123 * 2^30 = 1531238166015458148.352
		// 1531238166015458148 = 0x15400cffc7df3b64
		0, 8, 0, 12, 0x15, 0x40, 0x0c, 0xff, 0xc7, 0xdf, 0x3b, 0x64,
		0, 9, 0, 12, 0, 0, 0, 0x02, 0x80, 0, 0, 0,
		0, 6, 0, 15, 0, 1, 2, 0, 0, 0, 0, 0, 0, 0, 1,
		// vl2
		0, 3, 0, 9, 't', 'e', 's', 't', 0,
		// 1426076681.234 * 2^30 = 1531238176872061730.816
		// 1531238176872061731 = 0x15400d024ef9db23
		0, 8, 0, 12, 0x15, 0x40, 0x0d, 0x02, 0x4e, 0xf9, 0xdb, 0x23,
		0, 6, 0, 15, 0, 1, 2, 0, 0, 0, 0, 0, 0, 0, 2,
	}
	got := b.buffer.Bytes()

	if !reflect.DeepEqual(got, want) {
		t.Errorf("got %v, want %v", got, want)
	}
}
Exemple #2
0
func TestDerive(t *testing.T) {
	d := NewDerive(api.Identifier{
		Host:   "example.com",
		Plugin: "golang",
		Type:   "derive",
	})

	for i := 0; i < 10; i++ {
		d.Add(i)
	}

	want := api.ValueList{
		Identifier: api.Identifier{
			Host:   "example.com",
			Plugin: "golang",
			Type:   "derive",
		},
		Values: []api.Value{api.Derive(45)},
	}
	got := d.ValueList()

	if !reflect.DeepEqual(got, want) {
		t.Errorf("got %#v, want %#v", got, want)
	}

	s := expvar.Get("example.com/golang/derive").String()
	if s != "45" {
		t.Errorf("got %q, want %q", s, "45")
	}
}
Exemple #3
0
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
}
Exemple #4
0
func TestWriteValues(t *testing.T) {
	b := &Buffer{buffer: new(bytes.Buffer), size: DefaultBufferSize}

	b.writeValues([]api.Value{
		api.Gauge(42),
		api.Derive(31337),
		api.Gauge(math.NaN()),
	})

	want := []byte{0, 6, // pkg type
		0, 33, // pkg len
		0, 3, // num values
		1, 2, 1, // gauge, derive, gauge
		0, 0, 0, 0, 0, 0, 0x45, 0x40, // 42.0
		0, 0, 0, 0, 0, 0, 0x7a, 0x69, // 31337
		0, 0, 0, 0, 0, 0, 0xf8, 0x7f, // NaN
	}
	got := b.buffer.Bytes()

	if !reflect.DeepEqual(got, want) {
		t.Errorf("got %v, want %v", got, want)
	}
}
Exemple #5
0
// Add adds diff to d.
func (d *Derive) Add(diff int) {
	d.mu.Lock()
	defer d.mu.Unlock()
	d.value += api.Derive(diff)
}
Exemple #6
0
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)
		}
	}
}
Exemple #7
0
func TestWrite(t *testing.T) {
	cases := []struct {
		ValueList api.ValueList
		Graphite  *Graphite
		Want      string
	}{
		{ // case 0
			ValueList: api.ValueList{
				Identifier: api.Identifier{
					Host:           "example.com",
					Plugin:         "golang",
					PluginInstance: "example",
					Type:           "gauge",
					TypeInstance:   "answer",
				},
				Time:     time.Unix(1426975989, 1),
				Interval: 10 * time.Second,
				Values:   []api.Value{api.Gauge(42)},
			},
			Graphite: &Graphite{
				Prefix:            "-->",
				Suffix:            "<--",
				EscapeChar:        "_",
				SeparateInstances: false,
				AlwaysAppendDS:    true,
			},
			Want: "-->example_com<--.golang-example.gauge-answer.value 42 1426975989\r\n",
		},
		{ // case 1
			ValueList: api.ValueList{
				Identifier: api.Identifier{
					Host:           "example.com",
					Plugin:         "golang",
					PluginInstance: "example",
					Type:           "gauge",
					TypeInstance:   "answer",
				},
				Time:     time.Unix(1426975989, 1),
				Interval: 10 * time.Second,
				Values:   []api.Value{api.Derive(1337)},
			},
			Graphite: &Graphite{
				Prefix:            "collectd.",
				Suffix:            "",
				EscapeChar:        "@",
				SeparateInstances: true,
				AlwaysAppendDS:    false,
			},
			Want: "[email protected] 1337 1426975989\r\n",
		},
		{ // case 2
			ValueList: api.ValueList{
				Identifier: api.Identifier{
					Host:   "example.com",
					Plugin: "golang",
					Type:   "gauge",
				},
				Time:     time.Unix(1426975989, 1),
				Interval: 10 * time.Second,
				Values:   []api.Value{api.Gauge(42), api.Derive(1337)},
			},
			Graphite: &Graphite{
				Prefix:            "collectd.",
				Suffix:            "",
				EscapeChar:        "_",
				SeparateInstances: true,
				AlwaysAppendDS:    false,
			},
			Want: "collectd.example_com.golang.gauge.0 42 1426975989\r\n" +
				"collectd.example_com.golang.gauge.1 1337 1426975989\r\n",
		},
	}

	for i, c := range cases {
		buf := &bytes.Buffer{}
		c.Graphite.W = buf

		if err := c.Graphite.Write(c.ValueList); err != nil {
			t.Errorf("case %d: got %v, want %v", i, err, nil)
		}

		got := buf.String()
		if got != c.Want {
			t.Errorf("got %q, want %q", got, c.Want)
		}
	}
}