Add some tests to make coveralls happy

metrics_test.go

@@ -0,0 +1,55 @@
+package gostatsd
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestMetricReset(t *testing.T) {
+	// this is deliberately constructed without using named fields,
+	// so that if the fields change it will cause a compiler error.
+	m := &Metric{
+		"metric",
+		10,
+		1,
+		Tags{"tag"},
+		"something",
+		"somethingelse",
+		"source",
+		123,
+		COUNTER,
+		nil,
+	}
+	m.Reset()
+	// Tags needs to be an empty slice, not a nil slice, because half the reason
+	// behind having the MetricPool and Reset is to re-use the Tags slice. Therefore
+	// we don't nil it.
+	require.EqualValues(t, &Metric{Tags: Tags{}, Rate: 1}, m)
+}
+
+func TestMetricString(t *testing.T) {
+	types := []MetricType{COUNTER, TIMER, SET, GAUGE, 42}
+	names := []string{"counter", "timer", "set", "gauge", "unknown"}
+	for idx, name := range names {
+		require.Equal(t, name, types[idx].String())
+	}
+}
+
+func TestUpdateTags(t *testing.T) {
+	m := &Metric{}
+	m.FormatTagsKey()
+	require.EqualValues(t, "", m.TagsKey)
+	m.AddTagsSetSource(Tags{"foo"}, "source")
+	require.EqualValues(t, Tags{"foo"}, m.Tags)
+	require.EqualValues(t, "source", m.Source)
+	require.EqualValues(t, "", m.TagsKey)
+	m.FormatTagsKey()
+	require.EqualValues(t, "foo,s:source", m.TagsKey) // It's set
+	m.AddTagsSetSource(Tags{"foo2"}, "source2")
+	require.EqualValues(t, Tags{"foo", "foo2"}, m.Tags)
+	require.EqualValues(t, "source2", m.Source)
+	require.EqualValues(t, "", m.TagsKey) // It's cleared
+	m.FormatTagsKey()
+	require.EqualValues(t, "foo,foo2,s:source2", m.TagsKey)
+}