use meter interface

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

victoriametrics_test.go

@@ -0,0 +1,22 @@
+package victoriametrics
+
+import (
+	"os"
+	"testing"
+
+	"github.com/unistack-org/micro/v3/meter"
+)
+
+func TestBuildName(t *testing.T) {
+	m := NewMeter()
+	im := m.(*victoriametricsMeter)
+	check := `micro_foo{micro_aaa="b",micro_bar="baz"}`
+	name := im.buildName("foo", meter.Label("bar", "baz"), meter.Label("aaa", "b"))
+	if name != check {
+		t.Fatalf("metric name error: %s != %s", name, check)
+	}
+
+	cnt := m.Counter("counter", meter.Label("key", "val"))
+	cnt.Inc()
+	m.Write(os.Stdout, true)
+}