mirror of https://github.com/coder/coder.git
122 lines
5.1 KiB
Go
122 lines
5.1 KiB
Go
package pubsub_test
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import (
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"context"
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"database/sql"
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"testing"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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"cdr.dev/slog"
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"cdr.dev/slog/sloggers/slogtest"
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"github.com/coder/coder/v2/coderd/database/dbtestutil"
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"github.com/coder/coder/v2/coderd/database/pubsub"
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"github.com/coder/coder/v2/testutil"
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)
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func TestPGPubsub_Metrics(t *testing.T) {
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t.Parallel()
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if !dbtestutil.WillUsePostgres() {
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t.Skip("test only with postgres")
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}
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logger := slogtest.Make(t, nil).Leveled(slog.LevelDebug)
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connectionURL, closePg, err := dbtestutil.Open()
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require.NoError(t, err)
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defer closePg()
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db, err := sql.Open("postgres", connectionURL)
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require.NoError(t, err)
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defer db.Close()
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registry := prometheus.NewRegistry()
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ctx := testutil.Context(t, testutil.WaitLong)
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uut, err := pubsub.New(ctx, logger, db, connectionURL)
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require.NoError(t, err)
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defer uut.Close()
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err = registry.Register(uut)
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require.NoError(t, err)
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// each Gather measures pubsub latency by publishing a message & subscribing to it
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var gatherCount float64
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metrics, err := registry.Gather()
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gatherCount++
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require.NoError(t, err)
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require.True(t, testutil.PromGaugeHasValue(t, metrics, 0, "coder_pubsub_current_events"))
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require.True(t, testutil.PromGaugeHasValue(t, metrics, 0, "coder_pubsub_current_subscribers"))
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event := "test"
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data := "testing"
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messageChannel := make(chan []byte)
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unsub0, err := uut.Subscribe(event, func(ctx context.Context, message []byte) {
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messageChannel <- message
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})
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require.NoError(t, err)
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defer unsub0()
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go func() {
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err = uut.Publish(event, []byte(data))
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assert.NoError(t, err)
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}()
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_ = testutil.RequireRecvCtx(ctx, t, messageChannel)
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require.Eventually(t, func() bool {
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latencyBytes := gatherCount * pubsub.LatencyMessageLength
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metrics, err = registry.Gather()
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gatherCount++
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assert.NoError(t, err)
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return testutil.PromGaugeHasValue(t, metrics, 1, "coder_pubsub_current_events") &&
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testutil.PromGaugeHasValue(t, metrics, 1, "coder_pubsub_current_subscribers") &&
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testutil.PromGaugeHasValue(t, metrics, 1, "coder_pubsub_connected") &&
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testutil.PromCounterHasValue(t, metrics, gatherCount, "coder_pubsub_publishes_total", "true") &&
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testutil.PromCounterHasValue(t, metrics, gatherCount, "coder_pubsub_subscribes_total", "true") &&
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testutil.PromCounterHasValue(t, metrics, gatherCount, "coder_pubsub_messages_total", "normal") &&
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testutil.PromCounterHasValue(t, metrics, float64(len(data))+latencyBytes, "coder_pubsub_received_bytes_total") &&
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testutil.PromCounterHasValue(t, metrics, float64(len(data))+latencyBytes, "coder_pubsub_published_bytes_total") &&
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testutil.PromGaugeAssertion(t, metrics, func(in float64) bool { return in > 0 }, "coder_pubsub_send_latency_seconds") &&
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testutil.PromGaugeAssertion(t, metrics, func(in float64) bool { return in > 0 }, "coder_pubsub_receive_latency_seconds") &&
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testutil.PromCounterHasValue(t, metrics, gatherCount, "coder_pubsub_latency_measures_total") &&
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!testutil.PromCounterGathered(t, metrics, "coder_pubsub_latency_measure_errs_total")
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}, testutil.WaitShort, testutil.IntervalFast)
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colossalSize := 7600
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colossalData := make([]byte, colossalSize)
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for i := range colossalData {
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colossalData[i] = 'q'
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}
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unsub1, err := uut.Subscribe(event, func(ctx context.Context, message []byte) {
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messageChannel <- message
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})
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require.NoError(t, err)
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defer unsub1()
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go func() {
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err = uut.Publish(event, colossalData)
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assert.NoError(t, err)
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}()
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// should get 2 messages because we have 2 subs
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_ = testutil.RequireRecvCtx(ctx, t, messageChannel)
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_ = testutil.RequireRecvCtx(ctx, t, messageChannel)
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require.Eventually(t, func() bool {
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latencyBytes := gatherCount * pubsub.LatencyMessageLength
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metrics, err = registry.Gather()
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gatherCount++
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assert.NoError(t, err)
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return testutil.PromGaugeHasValue(t, metrics, 1, "coder_pubsub_current_events") &&
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testutil.PromGaugeHasValue(t, metrics, 2, "coder_pubsub_current_subscribers") &&
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testutil.PromGaugeHasValue(t, metrics, 1, "coder_pubsub_connected") &&
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testutil.PromCounterHasValue(t, metrics, 1+gatherCount, "coder_pubsub_publishes_total", "true") &&
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testutil.PromCounterHasValue(t, metrics, 1+gatherCount, "coder_pubsub_subscribes_total", "true") &&
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testutil.PromCounterHasValue(t, metrics, gatherCount, "coder_pubsub_messages_total", "normal") &&
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testutil.PromCounterHasValue(t, metrics, 1, "coder_pubsub_messages_total", "colossal") &&
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testutil.PromCounterHasValue(t, metrics, float64(colossalSize+len(data))+latencyBytes, "coder_pubsub_received_bytes_total") &&
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testutil.PromCounterHasValue(t, metrics, float64(colossalSize+len(data))+latencyBytes, "coder_pubsub_published_bytes_total") &&
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testutil.PromGaugeAssertion(t, metrics, func(in float64) bool { return in > 0 }, "coder_pubsub_send_latency_seconds") &&
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testutil.PromGaugeAssertion(t, metrics, func(in float64) bool { return in > 0 }, "coder_pubsub_receive_latency_seconds") &&
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testutil.PromCounterHasValue(t, metrics, gatherCount, "coder_pubsub_latency_measures_total") &&
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!testutil.PromCounterGathered(t, metrics, "coder_pubsub_latency_measure_errs_total")
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}, testutil.WaitShort, testutil.IntervalFast)
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}
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