Add noop client and tests

Resolves DataDog#88

statsd/noop.go

@@ -0,0 +1,59 @@
+package statsd
+
+import "time"
+
+// NoOpClient is a statsd client that does nothing. Can be useful in testing
+// situations for library users.
+type NoOpClient struct{}
+
+func (n *NoOpClient) Gauge(name string, value float64, tags []string, rate float64) error {
+	return nil
+}
+
+func (n *NoOpClient) Count(name string, value int64, tags []string, rate float64) error {
+	return nil
+}
+
+func (n *NoOpClient) Histogram(name string, value float64, tags []string, rate float64) error {
+	return nil
+}
+
+func (n *NoOpClient) Distribution(name string, value float64, tags []string, rate float64) error {
+	return nil
+}
+
+func (n *NoOpClient) Decr(name string, tags []string, rate float64) error {
+	return nil
+}
+
+func (n *NoOpClient) Incr(name string, tags []string, rate float64) error {
+	return nil
+}
+
+func (n *NoOpClient) Set(name string, value string, tags []string, rate float64) error {
+	return nil
+}
+
+func (n *NoOpClient) Timing(name string, value time.Duration, tags []string, rate float64) error {
+	return nil
+}
+
+func (n *NoOpClient) TimeInMilliseconds(name string, value float64, tags []string, rate float64) error {
+	return nil
+}
+
+func (n *NoOpClient) Event(e *Event) error {
+	return nil
+}
+
+func (n *NoOpClient) SimpleEvent(title, text string) error {
+	return nil
+}
+
+func (n *NoOpClient) ServiceCheck(sc *ServiceCheck) error {
+	return nil
+}
+
+func (n *NoOpClient) SimpleServiceCheck(name string, status ServiceCheckStatus) error {
+	return nil
+}

statsd/noop_test.go

@@ -0,0 +1,63 @@
+package statsd
+
+import (
+	"testing"
+	"time"
+)
+
+func TestNoOpClient(t *testing.T) {
+	c := NoOpClient{}
+	tags := []string{"a:b"}
+
+	if c.Gauge("asd", 123.4, tags, 56.0) != nil {
+		t.Error("Gauge output not nil")
+	}
+
+	if c.Count("asd", 1234, tags, 56.0) != nil {
+		t.Error("Count output not nil")
+	}
+
+	if c.Histogram("asd", 12.34, tags, 56.0) != nil {
+		t.Error("Histogram output not nil")
+	}
+
+	if c.Distribution("asd", 1.234, tags, 56.0) != nil {
+		t.Error("Distribution output not nil")
+	}
+
+	if c.Decr("asd", tags, 56.0) != nil {
+		t.Error("Decr output not nil")
+	}
+
+	if c.Incr("asd", tags, 56.0) != nil {
+		t.Error("Incr output not nil")
+	}
+
+	if c.Set("asd", "asd", tags, 56.0) != nil {
+		t.Error("Set output not nil")
+	}
+
+	if c.Timing("asd", time.Second, tags, 56.0) != nil {
+		t.Error("Timing output not nil")
+	}
+
+	if c.TimeInMilliseconds("asd", 1234.5, tags, 56.0) != nil {
+		t.Error("TimeInMilliseconds output not nil")
+	}
+
+	if c.Event(nil) != nil {
+		t.Error("Event output not nil")
+	}
+
+	if c.SimpleEvent("asd", "zxc") != nil {
+		t.Error("SimpleEvent output not nil")
+	}
+
+	if c.ServiceCheck(nil) != nil {
+		t.Error("ServiceCheck output not nil")
+	}
+
+	if c.SimpleServiceCheck("asd", Ok) != nil {
+		t.Error("SimpleServiceCheck output not nil")
+	}
+}