Common transformer tests (#97)

* Move chop lump transformer test to a generic log_note_transformer_test

* Add test cases to transformer test

- cat file flip
- cat file pit vow
- deal
- dent

* Move transformer tests over to transformer factor test file

- drip drip
- drip file ilk/repo/vow
- pit file deb ceiling/ilk/stability fee
- price feeds

* Move LogNoteTransformer test into factory package and remove log specific transformer tests

* Move Transformer test into factory package and remove log event specific transformer tests

* Respond to PR comments

pkg/transformers/test_data/generic.go

@@ -0,0 +1,57 @@
+// Copyright 2018 Vulcanize
+//
+// 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 test_data
+
+import (
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
+	"math/rand"
+	"time"
+)
+
+type GenericModel struct{}
+type GenericEntity struct{}
+
+var startingBlockNumber = rand.Int63()
+var topic = "0x" + randomString(64)
+var address = "0x" + randomString(38)
+
+var GenericTestLogs = []types.Log{{
+	Address:     common.HexToAddress(address),
+	Topics:      []common.Hash{common.HexToHash(topic)},
+	BlockNumber: uint64(startingBlockNumber),
+}}
+
+var GenericTestConfig = shared.SingleTransformerConfig{
+	TransformerName:     "generic-test-transformer",
+	ContractAddresses:   []string{address},
+	ContractAbi:         randomString(100),
+	Topic:               topic,
+	StartingBlockNumber: startingBlockNumber,
+	EndingBlockNumber:   startingBlockNumber + 1,
+}
+
+func randomString(length int) string {
+	var seededRand *rand.Rand = rand.New(
+		rand.NewSource(time.Now().UnixNano()))
+	charset := "abcdefghijklmnopqrstuvwxyz1234567890"
+	b := make([]byte, length)
+	for i := range b {
+		b[i] = charset[seededRand.Intn(len(charset))]
+	}
+
+	return string(b)
+}

pkg/transformers/test_data/mocks/converter.go

@@ -15,6 +15,8 @@ type MockConverter struct {
 	EntitiesToConvert       []interface{}
 	EntitiesToReturn        []interface{}
 	ModelsToReturn          []interface{}
+	ToEntitiesCalledCounter int
+	ToModelsCalledCounter   int
 }
 
 func (converter *MockConverter) ToEntities(contractAbi string, ethLogs []types.Log) ([]interface{}, error) {

pkg/transformers/test_data/mocks/log_note_converter.go

@@ -5,13 +5,15 @@ import (
 )
 
 type MockLogNoteConverter struct {
-	err          error
-	returnModels []interface{}
-	PassedLogs   []types.Log
+	err                   error
+	returnModels          []interface{}
+	PassedLogs            []types.Log
+	ToModelsCalledCounter int
 }
 
 func (converter *MockLogNoteConverter) ToModels(ethLogs []types.Log) ([]interface{}, error) {
 	converter.PassedLogs = ethLogs
+	converter.ToModelsCalledCounter ++
 	return converter.returnModels, converter.err
 }
 

pkg/transformers/test_data/mocks/repository.go

@@ -19,12 +19,14 @@ type MockRepository struct {
 	PassedHeaderID                   int64
 	PassedModels                     []interface{}
 	SetDbCalled                      bool
+	CreateCalledCounter              int
 }
 
 func (repository *MockRepository) Create(headerID int64, models []interface{}) error {
 	repository.PassedHeaderID = headerID
 	repository.PassedModels = models
 	repository.CreatedHeaderIds = append(repository.CreatedHeaderIds, headerID)
+	repository.CreateCalledCounter ++
 
 	return repository.createError
 }