83 lines
1.5 KiB
Go
83 lines
1.5 KiB
Go
package event_test
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import (
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"bytes"
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"context"
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"encoding/json"
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"testing"
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"github.com/matryer/is"
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"go.sour.is/ev/pkg/event"
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)
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type DummyEvent struct {
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Value string
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event.IsEvent
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}
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func (e *DummyEvent) MarshalBinary() ([]byte, error) {
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return json.Marshal(e)
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}
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func (e *DummyEvent) UnmarshalBinary(b []byte) error {
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return json.Unmarshal(b, e)
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}
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func TestEventEncode(t *testing.T) {
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is := is.New(t)
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ctx := context.Background()
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err := event.Register(ctx, &DummyEvent{})
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is.NoErr(err)
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var lis event.Events = event.NewEvents(
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&DummyEvent{Value: "testA"},
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&DummyEvent{Value: "testB"},
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&DummyEvent{Value: "testC"},
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)
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lis.SetStreamID("test")
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blis, err := event.EncodeEvents(lis...)
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is.NoErr(err)
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for _, b := range blis {
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sp := bytes.SplitN(b, []byte{'\t'}, 4)
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is.Equal(len(sp), 4)
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is.Equal(string(sp[1]), "test")
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is.Equal(string(sp[2]), "event_test.DummyEvent")
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}
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chk, err := event.DecodeEvents(ctx, blis...)
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is.NoErr(err)
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for i := range chk {
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is.Equal(lis[i], chk[i])
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}
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}
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type exampleAgg struct{ value string }
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func (a *exampleAgg) ApplyEvent(lis ...event.Event) {
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for _, e := range lis {
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switch e := e.(type) {
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case interface{ Payload() exampleEvSetValue }:
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a.value = e.Payload().value
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}
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}
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}
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type exampleEvSetValue struct{ value string }
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func TestApplyEventGeneric(t *testing.T) {
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payload := &exampleAgg{}
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var agg = event.AsAggregate(payload)
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agg.ApplyEvent(event.NewEvents(
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event.AsEvent(exampleEvSetValue{"hello"}),
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)...)
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is := is.New(t)
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is.Equal(payload.value, "hello")
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}
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