gitlabhq/gitlab-shell

package gitaly

import (
    "context"
    "testing"

    "github.com/prometheus/client_golang/prometheus/testutil"
    "github.com/stretchr/testify/require"

    "gitlab.com/gitlab-org/gitlab-shell/v14/internal/metrics"
)

func TestPrometheusMetrics(t *testing.T) {
    metrics.GitalyConnectionsTotal.Reset()

    c := newClient()

    cmd := Command{ServiceName: "git-upload-pack", Address: "tcp://localhost:9999"}
    c.newConnection(context.Background(), cmd)
    c.newConnection(context.Background(), cmd)

    require.Equal(t, 1, testutil.CollectAndCount(metrics.GitalyConnectionsTotal))
    require.InDelta(t, 2, testutil.ToFloat64(metrics.GitalyConnectionsTotal.WithLabelValues("ok")), 0.1)
    require.InDelta(t, 0, testutil.ToFloat64(metrics.GitalyConnectionsTotal.WithLabelValues("fail")), 0.1)

    cmd = Command{Address: ""}
    c.newConnection(context.Background(), cmd)

    require.InDelta(t, 2, testutil.ToFloat64(metrics.GitalyConnectionsTotal.WithLabelValues("ok")), 0.1)
    require.InDelta(t, 1, testutil.ToFloat64(metrics.GitalyConnectionsTotal.WithLabelValues("fail")), 0.1)
}

func TestCachedConnections(t *testing.T) {
    c := newClient()

    require.Empty(t, c.cache.connections)

    cmd := Command{ServiceName: "git-upload-pack", Address: "tcp://localhost:9999"}

    conn, err := c.GetConnection(context.Background(), cmd)
    require.NoError(t, err)
    require.Len(t, c.cache.connections, 1)

    newConn, err := c.GetConnection(context.Background(), cmd)
    require.NoError(t, err)
    require.Len(t, c.cache.connections, 1)
    require.Equal(t, conn, newConn)

    cmd = Command{ServiceName: "git-upload-pack", Address: "tcp://localhost:9998"}
    _, err = c.GetConnection(context.Background(), cmd)
    require.NoError(t, err)
    require.Len(t, c.cache.connections, 2)
}

func newClient() *Client {
    c := &Client{}
    c.InitSidechannelRegistry(context.Background())
    return c
}