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package reflex
import (
"context"
"strconv"
"testing"
"time"
"github.com/luno/jettison/errors"
"github.com/luno/jettison/jtest"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/testutil"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"go.opentelemetry.io/otel"
tracesdk "go.opentelemetry.io/otel/sdk/trace"
"go.opentelemetry.io/otel/trace"
"github.com/luno/reflex/internal/metrics"
"github.com/luno/reflex/internal/tracing"
)
type (
stream int64
sType int
)
func (i sType) ReflexType() int { return int(i) }
func (s *stream) Recv() (*Event, error) {
val := int64(*s) + 1
*s = stream(val)
return &Event{
ID: strconv.FormatInt(val, 10),
Type: sType(1),
Timestamp: time.Now(),
}, nil
}
type cursor int64
func (c cursor) GetCursor(context.Context, string) (string, error) {
return strconv.FormatInt(int64(c), 10), nil
}
func (c *cursor) SetCursor(_ context.Context, _ string, val string) error {
v, err := strconv.ParseInt(val, 10, 64)
if err != nil {
return err
}
*c = cursor(v)
return nil
}
func (c cursor) Flush(context.Context) error { return nil }
func makeStream(_ context.Context, after string, _ ...StreamOption) (StreamClient, error) {
var s stream
if after != "" {
i, err := strconv.ParseInt(after, 10, 64)
if err != nil {
return nil, err
}
s = stream(i)
}
return &s, nil
}
func TestReuseConsumer(t *testing.T) {
idToFail := int64(2)
metrics.ConsumerLag.Reset()
con := NewConsumer("test", func(ctx context.Context, event *Event) error {
// Should have a metric when running inside a Consume function
assert.Len(t, fetchMetrics(), 1)
if event.IDInt() < idToFail {
return nil
}
return errors.New("break")
})
var store cursor
spec := NewSpec(makeStream, &store, con)
ctx := context.Background()
// Run the consumer, consuming a single event
_ = Run(ctx, spec)
v, err := store.GetCursor(ctx, "test")
jtest.RequireNil(t, err)
assert.Equal(t, "1", v)
assert.Len(t, fetchMetrics(), 1)
idToFail++
// Run again to make sure we can re-use the consumer
_ = Run(ctx, spec)
v, err = store.GetCursor(ctx, "test")
jtest.RequireNil(t, err)
assert.Equal(t, "2", v)
assert.Len(t, fetchMetrics(), 1)
}
func fetchMetrics() []prometheus.Metric {
ch := make(chan prometheus.Metric, 100)
metrics.ConsumerLag.Collect(ch)
close(ch)
ret := make([]prometheus.Metric, 0, len(ch))
for m := range ch {
ret = append(ret, m)
}
return ret
}
func TestConsumeFromFresh(t *testing.T) {
c := NewConsumer("test",
func(context.Context, *Event) error { return nil },
)
err := c.Consume(context.Background(), &Event{
ID: "1",
Type: sType(1),
Timestamp: time.Now(),
})
jtest.RequireNil(t, err)
}
func TestPassTraceIntoConsumerContext(t *testing.T) {
t.Run("Ensure trace is loaded into context as parent and passed to consumer func", func(t *testing.T) {
tp := tracesdk.NewTracerProvider()
otel.SetTracerProvider(tp)
traceID, err := trace.TraceIDFromHex("00000000000000000000000000000009")
jtest.RequireNil(t, err)
spanID, err := trace.SpanIDFromHex("0000000000000002")
jtest.RequireNil(t, err)
expectedSpanCtx := trace.NewSpanContext(
trace.SpanContextConfig{
TraceID: traceID,
SpanID: spanID,
},
)
spanJson, err := tracing.Marshal(expectedSpanCtx)
jtest.RequireNil(t, err)
e := &Event{
ID: "1",
Type: sType(1),
Timestamp: time.Now(),
Trace: spanJson,
}
c := NewConsumer("test",
func(ctx context.Context, e *Event) error {
span := trace.SpanFromContext(ctx)
require.Equal(t, expectedSpanCtx.TraceID().String(), span.SpanContext().TraceID().String())
require.Equal(t, expectedSpanCtx.TraceState().String(), span.SpanContext().TraceState().String())
return nil
},
)
err = c.Consume(context.Background(), e)
jtest.RequireNil(t, err)
})
}
func TestConsumeWithSkip(t *testing.T) {
ctx := context.Background()
consumerName := "test_consumer"
consumedCounter := new(int)
cFn := func(context.Context, *Event) error {
*consumedCounter++
return nil
}
evts := []*Event{
{
ID: "1",
Type: eventType(1),
Timestamp: time.Now(),
},
{
ID: "2",
Type: eventType(2),
Timestamp: time.Now(),
},
{
ID: "3",
Type: eventType(3),
Timestamp: time.Now(),
},
}
tcs := []struct {
name string
c Consumer
expConsumeCount int
expMetricCount int
expSkipCount float64
errs []error
}{
{
name: "no include filter provided",
c: NewConsumer(consumerName, cFn),
expConsumeCount: 3,
expMetricCount: 0,
expSkipCount: 0,
},
{
name: "empty include filter provided",
c: NewConsumer(consumerName, cFn, WithFilterIncludeTypes()),
expConsumeCount: 3,
expMetricCount: 0,
expSkipCount: 0,
},
{
name: "nill event filter provided",
c: NewConsumer(consumerName, cFn, WithEventFilter(nil)),
expConsumeCount: 3,
expMetricCount: 0,
expSkipCount: 0,
},
{
name: "include filter provided",
c: NewConsumer(consumerName, cFn, WithFilterIncludeTypes(eventType(1), eventType(2))),
expConsumeCount: 2,
expMetricCount: 1,
expSkipCount: 1,
},
{
name: "event filter provided",
c: NewConsumer(consumerName, cFn, WithEventFilter(func(e *Event) (bool, error) {
return e.ID == "1" || e.ID == "2", nil
})),
expConsumeCount: 2,
expMetricCount: 1,
expSkipCount: 1,
},
{
name: "include filter and event filter provided",
c: NewConsumer(consumerName, cFn, WithFilterIncludeTypes(eventType(1), eventType(2)), WithEventFilter(func(e *Event) (bool, error) {
return e.ID == "1", nil
})),
expConsumeCount: 1,
expMetricCount: 1,
expSkipCount: 2,
},
{
name: "include filter and event filter errors",
c: NewConsumer(consumerName, cFn, WithFilterIncludeTypes(eventType(1), eventType(2)), WithEventFilter(func(e *Event) (bool, error) {
if e.ID == "1" {
return false, errors.New("something failed")
}
return true, nil
})),
expConsumeCount: 1,
expMetricCount: 1,
expSkipCount: 1,
errs: []error{filterErr, nil, nil},
},
}
for _, tc := range tcs {
t.Run(tc.name, func(t *testing.T) {
metrics.ConsumerSkippedEvents.Reset()
*consumedCounter = 0
for i, ev := range evts {
err := tc.c.Consume(ctx, ev)
if tc.errs == nil {
jtest.RequireNil(t, err)
} else {
jtest.Require(t, tc.errs[i], err)
}
}
require.Equal(t, tc.expConsumeCount, *consumedCounter)
require.Equal(t, tc.expMetricCount, testutil.CollectAndCount(metrics.ConsumerSkippedEvents))
require.Equal(t, tc.expSkipCount, testutil.ToFloat64(metrics.ConsumerSkippedEvents.WithLabelValues(consumerName)))
})
}
}
func TestConsumeWithErrorAndReporting(t *testing.T) {
ctx := context.Background()
consumerName := "test_consumer"
consumedCounter := new(int)
recoveredCounter := new(int)
eventId := new(int)
cErr := errors.New("cfn errored")
rErr := errors.New("rfn changed error")
cFnErr := func(context.Context, *Event) error {
*consumedCounter++
return errors.Wrap(cErr, "")
}
cFnCanc := func(context.Context, *Event) error {
*consumedCounter++
return errors.Wrap(context.Canceled, "")
}
rFnNil := func(_ context.Context, e *Event, c Consumer, err error) error {
*recoveredCounter++
*eventId, _ = strconv.Atoi(e.ID)
return nil
}
rFnSame := func(_ context.Context, e *Event, c Consumer, err error) error {
*recoveredCounter++
*eventId, _ = strconv.Atoi(e.ID)
return err
}
rFnDiff := func(_ context.Context, e *Event, c Consumer, err error) error {
*recoveredCounter++
*eventId, _ = strconv.Atoi(e.ID)
return errors.Wrap(rErr, "")
}
evts := []*Event{
{
ID: "1",
Type: eventType(1),
Timestamp: time.Now(),
},
{
ID: "2",
Type: eventType(2),
Timestamp: time.Now(),
},
{
ID: "3",
Type: eventType(3),
Timestamp: time.Now(),
},
}
allEventIds := []int{1, 2, 3}
noEventIds := []int{0, 0, 0}
tcs := []struct {
name string
c Consumer
expConsumeCount int
expRecoveredCount int
expMetricErrorCount int
expEventIDs []int
expErr error
}{
{
name: "Recover Function notes but doesn't change error",
c: NewConsumer(consumerName, cFnErr, WithRecoverFunction(rFnSame)),
expConsumeCount: 3,
expRecoveredCount: 3,
expMetricErrorCount: 3,
expEventIDs: allEventIds,
expErr: cErr,
},
{
name: "Recover Function not called when expected error",
c: NewConsumer(consumerName, cFnCanc, WithRecoverFunction(rFnSame)),
expConsumeCount: 3,
expRecoveredCount: 0,
expMetricErrorCount: 0,
expEventIDs: noEventIds,
expErr: context.Canceled,
},
{
name: "Recover Function handles error",
c: NewConsumer(consumerName, cFnErr, WithRecoverFunction(rFnNil)),
expConsumeCount: 3,
expRecoveredCount: 3,
expMetricErrorCount: 3,
expEventIDs: allEventIds,
expErr: nil,
},
{
name: "Recover Function throws different error",
c: NewConsumer(consumerName, cFnErr, WithRecoverFunction(rFnDiff)),
expConsumeCount: 3,
expRecoveredCount: 3,
expMetricErrorCount: 3,
expEventIDs: allEventIds,
expErr: rErr,
},
}
for _, tc := range tcs {
t.Run(tc.name, func(t *testing.T) {
metrics.ConsumerErrors.Reset()
metrics.ConsumerSkippedEvents.Reset()
*consumedCounter = 0
*recoveredCounter = 0
*eventId = 0
for i, ev := range evts {
err := tc.c.Consume(ctx, ev)
require.Equal(t, tc.expEventIDs[i], *eventId)
jtest.Require(t, tc.expErr, err)
}
require.Equal(t, tc.expConsumeCount, *consumedCounter)
require.Equal(t, tc.expRecoveredCount, *recoveredCounter)
})
}
}
func TestWithConsumerActivityTTLFunc(t *testing.T) {
c := new(consumer)
WithConsumerActivityTTLFunc(func() time.Duration { return time.Hour })(c)
require.Equal(t, time.Hour, c.activityTTL)
}