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event_store_test.go
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event_store_test.go
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package goengine_test
import (
. "github.com/hellofresh/goengine"
"github.com/hellofresh/goengine/inmemory"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
)
var _ = Describe("A Event Store", func() {
var eventStream *EventStream
var store EventStore
var aggregateId string
var streamName StreamName
store = inmemory.NewEventStore()
BeforeEach(func() {
eventStream = nil
aggregateId = "594fb936-d646-44b5-a152-84eb4f709f20"
streamName = "test"
})
JustBeforeEach(func() {
var events []*DomainMessage
events = append(events, RecordNow(aggregateId, 0, NewSomethingHappened()))
events = append(events, RecordNow(aggregateId, 1, NewSomethingHappened()))
events = append(events, RecordNow(aggregateId, 2, NewSomethingHappened()))
eventStream = NewEventStream(streamName, events)
})
Describe("when something happens", func() {
It("should save an event", func() {
err := store.Append(eventStream)
Expect(err).To(BeNil())
})
It("should retrive the things that happened", func() {
expectedEvents, err := store.GetEventsFor(streamName, aggregateId)
Expect(err).To(BeNil())
Expect(expectedEvents.Events).To(HaveLen(3))
})
It("should count the events that happened", func() {
Expect(store.CountEventsFor(streamName, aggregateId)).Should(Equal(3))
})
It("should retrieve events for version bigger then 1", func() {
expectedEvents, err := store.FromVersion(streamName, aggregateId, 1)
Expect(err).To(BeNil())
Expect(expectedEvents.Events).To(HaveLen(2))
})
})
})