metrics have been added

1 files changed, 38 insertions, 0 deletions

diff --git a/library/go/core/metrics/prometheus/counter_test.go b/library/go/core/metrics/prometheus/counter_test.go
new file mode 100644
index 0000000000..04f0c894f8
--- /dev/null
+++ b/library/go/core/metrics/prometheus/counter_test.go
@@ -0,0 +1,38 @@
+package prometheus
+
+import (
+	"testing"
+
+	"github.com/prometheus/client_golang/prometheus"
+	dto "github.com/prometheus/client_model/go"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestCounter_Add(t *testing.T) {
+	c := &Counter{cnt: prometheus.NewCounter(prometheus.CounterOpts{
+		Name: "test_counter_add",
+	})}
+
+	var expectValue int64 = 42
+	c.Add(expectValue)
+
+	var res dto.Metric
+	err := c.cnt.Write(&res)
+
+	assert.NoError(t, err)
+	assert.Equal(t, expectValue, int64(res.GetCounter().GetValue()))
+}
+
+func TestCounter_Inc(t *testing.T) {
+	c := &Counter{cnt: prometheus.NewCounter(prometheus.CounterOpts{
+		Name: "test_counter_inc",
+	})}
+
+	var res dto.Metric
+	for i := 1; i <= 10; i++ {
+		c.Inc()
+		err := c.cnt.Write(&res)
+		assert.NoError(t, err)
+		assert.Equal(t, int64(i), int64(res.GetCounter().GetValue()))
+	}
+}