mirror of https://github.com/status-im/consul.git
108 lines
3.3 KiB
Go
108 lines
3.3 KiB
Go
package external
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import (
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"context"
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"net"
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"sort"
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"testing"
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"github.com/armon/go-metrics"
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"github.com/google/go-cmp/cmp"
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"github.com/stretchr/testify/require"
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"golang.org/x/sync/errgroup"
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"google.golang.org/grpc"
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"github.com/hashicorp/go-hclog"
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grpcmiddleware "github.com/hashicorp/consul/agent/grpc-middleware"
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"github.com/hashicorp/consul/agent/grpc-middleware/testutil"
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"github.com/hashicorp/consul/agent/grpc-middleware/testutil/testservice"
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"github.com/hashicorp/consul/proto/prototest"
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)
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func TestServer_EmitsStats(t *testing.T) {
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sink, metricsObj := testutil.NewFakeSink(t)
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srv := NewServer(hclog.Default(), metricsObj, nil, grpcmiddleware.NullRateLimiter())
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testservice.RegisterSimpleServer(srv, &testservice.Simple{})
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lis, err := net.Listen("tcp", "127.0.0.1:0")
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require.NoError(t, err)
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lis = grpcmiddleware.LabelledListener{Listener: lis, Protocol: grpcmiddleware.ProtocolPlaintext}
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ctx, cancel := context.WithCancel(context.Background())
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t.Cleanup(cancel)
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g, ctx := errgroup.WithContext(ctx)
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g.Go(func() error {
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return srv.Serve(lis)
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})
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t.Cleanup(func() {
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srv.Stop()
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if err := g.Wait(); err != nil {
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t.Logf("grpc server error: %v", err)
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}
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})
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//nolint:staticcheck
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conn, err := grpc.DialContext(ctx, lis.Addr().String(), grpc.WithInsecure())
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require.NoError(t, err)
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t.Cleanup(func() { conn.Close() })
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client := testservice.NewSimpleClient(conn)
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fClient, err := client.Flow(ctx, &testservice.Req{Datacenter: "mine"})
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require.NoError(t, err)
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// Wait for the first event so that we know the stream is sending.
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_, err = fClient.Recv()
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require.NoError(t, err)
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cancel()
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conn.Close()
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srv.GracefulStop()
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// Wait for the server to stop so that active_streams is predictable.
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require.NoError(t, g.Wait())
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// Occasionally the active_stream=0 metric may be emitted before the
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// active_conns=0 metric. The order of those metrics is not really important
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// so we sort the calls to match the expected.
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sort.Slice(sink.GaugeCalls, func(i, j int) bool {
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if i < 2 || j < 2 {
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return i < j
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}
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if len(sink.GaugeCalls[i].Key) < 4 || len(sink.GaugeCalls[j].Key) < 4 {
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return i < j
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}
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return sink.GaugeCalls[i].Key[3] < sink.GaugeCalls[j].Key[3]
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})
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cmpMetricCalls := cmp.AllowUnexported(testutil.MetricCall{})
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expLabels := []metrics.Label{{
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Name: "server_type",
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Value: "external",
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}}
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expectedGauge := []testutil.MetricCall{
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{Key: []string{"testing", "grpc", "server", "connections"}, Val: 1, Labels: expLabels},
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{Key: []string{"testing", "grpc", "server", "streams"}, Val: 1, Labels: expLabels},
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{Key: []string{"testing", "grpc", "server", "connections"}, Val: 0, Labels: expLabels},
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{Key: []string{"testing", "grpc", "server", "streams"}, Val: 0, Labels: expLabels},
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}
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prototest.AssertDeepEqual(t, expectedGauge, sink.GaugeCalls, cmpMetricCalls)
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expectedCounter := []testutil.MetricCall{
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{Key: []string{"testing", "grpc", "server", "connection", "count"}, Val: 1, Labels: expLabels},
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{Key: []string{"testing", "grpc", "server", "request", "count"}, Val: 1, Labels: expLabels},
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{Key: []string{"testing", "grpc", "server", "stream", "count"}, Val: 1, Labels: expLabels},
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}
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prototest.AssertDeepEqual(t, expectedCounter, sink.IncrCounterCalls, cmpMetricCalls)
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}
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func logError(t *testing.T, f func() error) func() {
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return func() {
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if err := f(); err != nil {
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t.Logf(err.Error())
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}
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}
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}
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