ipld-eth-server/libraries/shared/watcher_test.go
2018-08-14 10:47:43 -05:00

71 lines
1.9 KiB
Go

package shared_test
import (
"errors"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
"github.com/vulcanize/vulcanizedb/libraries/shared"
"github.com/vulcanize/vulcanizedb/pkg/core"
"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
shared2 "github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
)
type MockTransformer struct {
executeWasCalled bool
executeError error
}
func (mh *MockTransformer) Execute() error {
if mh.executeError != nil {
return mh.executeError
}
mh.executeWasCalled = true
return nil
}
func fakeTransformerInitializer(db *postgres.DB, blockchain core.BlockChain) shared2.Transformer {
return &MockTransformer{}
}
var _ = Describe("Watcher", func() {
It("Adds transformers", func() {
watcher := shared.Watcher{}
watcher.AddTransformers([]shared2.TransformerInitializer{fakeTransformerInitializer})
Expect(len(watcher.Transformers)).To(Equal(1))
Expect(watcher.Transformers).To(ConsistOf(&MockTransformer{}))
})
It("Adds transformers from multiple sources", func() {
watcher := shared.Watcher{}
watcher.AddTransformers([]shared2.TransformerInitializer{fakeTransformerInitializer})
watcher.AddTransformers([]shared2.TransformerInitializer{fakeTransformerInitializer})
Expect(len(watcher.Transformers)).To(Equal(2))
})
It("Executes each transformer", func() {
watcher := shared.Watcher{}
fakeTransformer := &MockTransformer{}
watcher.Transformers = []shared2.Transformer{fakeTransformer}
watcher.Execute()
Expect(fakeTransformer.executeWasCalled).To(BeTrue())
})
It("Returns an error if transformer returns an error", func() {
watcher := shared.Watcher{}
fakeTransformer := &MockTransformer{executeError: errors.New("Something bad happened")}
watcher.Transformers = []shared2.Transformer{fakeTransformer}
err := watcher.Execute()
Expect(err).To(HaveOccurred())
Expect(fakeTransformer.executeWasCalled).To(BeFalse())
})
})