/
broker_channel_flow_helper.go
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/
broker_channel_flow_helper.go
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/*
Copyright 2020 The Knative Authors
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package helpers
import (
"testing"
cloudevents "github.com/cloudevents/sdk-go/v2"
. "github.com/cloudevents/sdk-go/v2/test"
"github.com/google/uuid"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"knative.dev/eventing/pkg/apis/eventing/v1beta1"
testlib "knative.dev/eventing/test/lib"
"knative.dev/eventing/test/lib/recordevents"
"knative.dev/eventing/test/lib/resources"
)
/*
BrokerChannelFlowWithTransformation tests the following topology:
------------- ----------------------
| | | |
v | v |
EventSource ---> Broker ---> Trigger1 -------> Service(Transformation)
|
|
|-------> Trigger2 -------> Service(Logger1)
|
|
|-------> Trigger3 -------> Channel --------> Subscription --------> Service(Logger2)
Explanation:
Trigger1 filters the orignal event and tranforms it to a new event,
Trigger2 logs all events,
Trigger3 filters the transformed event and sends it to Channel.
*/
func BrokerChannelFlowWithTransformation(t *testing.T,
brokerClass string,
brokerVersion string,
triggerVersion string,
channelTestRunner testlib.ComponentsTestRunner,
options ...testlib.SetupClientOption) {
const (
senderName = "e2e-brokerchannel-sender"
brokerName = "e2e-brokerchannel-broker"
any = v1beta1.TriggerAnyFilter
eventType = "type1"
transformedEventType = "type2"
eventSource = "http://source1.com"
transformedEventSource = "http://source2.com"
eventBody = `{"msg":"e2e-brokerchannel-body"}`
transformedBody = `{"msg":"transformed body"}`
triggerName1 = "e2e-brokerchannel-trigger1"
triggerName2 = "e2e-brokerchannel-trigger2"
triggerName3 = "e2e-brokerchannel-trigger3"
transformationPodName = "e2e-brokerchannel-trans-pod"
allEventsRecorderPodName = "e2e-brokerchannel-logger-pod1"
transformedEventsRecorderPodName = "e2e-brokerchannel-logger-pod2"
channelName = "e2e-brokerchannel-channel"
subscriptionName = "e2e-brokerchannel-subscription"
)
channelTestRunner.RunTests(t, testlib.FeatureBasic, func(st *testing.T, channel metav1.TypeMeta) {
client := testlib.Setup(st, true, options...)
defer testlib.TearDown(client)
config := client.CreateBrokerConfigMapOrFail(brokerName, &channel)
//&channel
// create a new broker
if brokerVersion == "v1" {
client.CreateBrokerV1OrFail(brokerName, resources.WithBrokerClassForBrokerV1(brokerClass), resources.WithConfigForBrokerV1(config))
} else {
client.CreateBrokerV1Beta1OrFail(brokerName, resources.WithBrokerClassForBrokerV1Beta1(brokerClass), resources.WithConfigForBrokerV1Beta1(config))
}
client.WaitForResourceReadyOrFail(brokerName, testlib.BrokerTypeMeta)
// eventToSend is the event sent as input of the test
eventToSend := cloudevents.NewEvent()
eventToSend.SetID(uuid.New().String())
eventToSend.SetType(eventType)
eventToSend.SetSource(eventSource)
if err := eventToSend.SetData(cloudevents.ApplicationJSON, []byte(eventBody)); err != nil {
t.Fatalf("Cannot set the payload of the event: %s", err.Error())
}
// create the transformation service for trigger1
transformationPod := resources.EventTransformationPod(
transformationPodName,
transformedEventType,
transformedEventSource,
[]byte(transformedBody),
)
client.CreatePodOrFail(transformationPod, testlib.WithService(transformationPodName))
// create trigger1 to receive the original event, and do event transformation
if triggerVersion == "v1" {
client.CreateTriggerV1OrFail(
triggerName1,
resources.WithBrokerV1(brokerName),
resources.WithAttributesTriggerFilterV1(eventSource, eventType, nil),
resources.WithSubscriberServiceRefForTriggerV1(transformationPodName),
)
} else {
client.CreateTriggerOrFailV1Beta1(
triggerName1,
resources.WithBrokerV1Beta1(brokerName),
resources.WithAttributesTriggerFilterV1Beta1(eventSource, eventType, nil),
resources.WithSubscriberServiceRefForTriggerV1Beta1(transformationPodName),
)
}
// create event tracker that should receive all sent events
allEventTracker, _ := recordevents.StartEventRecordOrFail(client, allEventsRecorderPodName)
// create trigger to receive all the events
if triggerVersion == "v1" {
client.CreateTriggerV1OrFail(
triggerName2,
resources.WithBrokerV1(brokerName),
resources.WithAttributesTriggerFilterV1(any, any, nil),
resources.WithSubscriberServiceRefForTriggerV1(allEventsRecorderPodName),
)
} else {
client.CreateTriggerOrFailV1Beta1(
triggerName2,
resources.WithBrokerV1Beta1(brokerName),
resources.WithAttributesTriggerFilterV1Beta1(any, any, nil),
resources.WithSubscriberServiceRefForTriggerV1Beta1(allEventsRecorderPodName),
)
}
// create channel for trigger3
client.CreateChannelOrFail(channelName, &channel)
client.WaitForResourceReadyOrFail(channelName, &channel)
// create trigger3 to receive the transformed event, and send it to the channel
channelURL, err := client.GetAddressableURI(channelName, &channel)
if err != nil {
st.Fatalf("Failed to get the url for the channel %q: %+v", channelName, err)
}
if triggerVersion == "v1" {
client.CreateTriggerV1OrFail(
triggerName3,
resources.WithBrokerV1(brokerName),
resources.WithAttributesTriggerFilterV1(transformedEventSource, transformedEventType, nil),
resources.WithSubscriberURIForTriggerV1(channelURL),
)
} else {
client.CreateTriggerOrFailV1Beta1(
triggerName3,
resources.WithBrokerV1Beta1(brokerName),
resources.WithAttributesTriggerFilterV1Beta1(transformedEventSource, transformedEventType, nil),
resources.WithSubscriberURIForTriggerV1Beta1(channelURL),
)
}
// create event tracker that should receive only transformed events
transformedEventTracker, _ := recordevents.StartEventRecordOrFail(client, transformedEventsRecorderPodName)
// create subscription
client.CreateSubscriptionOrFail(
subscriptionName,
channelName,
&channel,
resources.WithSubscriberForSubscription(transformedEventsRecorderPodName),
)
// wait for all test resources to be ready, so that we can start sending events
client.WaitForAllTestResourcesReadyOrFail()
// send CloudEvent to the broker
client.SendEventToAddressable(senderName, brokerName, testlib.BrokerTypeMeta, eventToSend)
// Assert the results on the event trackers
originalEventMatcher := recordevents.MatchEvent(AllOf(
HasSource(eventSource),
HasType(eventType),
HasData([]byte(eventBody)),
))
transformedEventMatcher := recordevents.MatchEvent(AllOf(
HasSource(transformedEventSource),
HasType(transformedEventType),
HasData([]byte(transformedBody)),
))
allEventTracker.AssertAtLeast(1, originalEventMatcher)
allEventTracker.AssertAtLeast(1, transformedEventMatcher)
transformedEventTracker.AssertAtLeast(1, transformedEventMatcher)
transformedEventTracker.AssertNot(originalEventMatcher)
})
}