VDB-919 Generalise converter (#152)

* Generalise transformer stack to use InsertionModel

* Add tests for event repository

* Restrict accepted values in InsertionModel

* Add call to repository.SetDB

* Improve error propagation/clarity on GetABI()

* Remove maker references in example

* Please golint

* refactor rollback error handling in repository

* Cleaner errors in repository, refactor tests

libraries/shared/mocks/event_converter.go

@@ -16,41 +16,29 @@
 
 package mocks
 
-import "github.com/vulcanize/vulcanizedb/pkg/core"
+import (
+	"github.com/vulcanize/vulcanizedb/libraries/shared/factories/event"
+	"github.com/vulcanize/vulcanizedb/pkg/core"
+	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
+)
 
 type MockConverter struct {
-	ToEntitiesError         error
-	PassedContractAddresses []string
 	ToModelsError           error
-	entityConverterError    error
-	modelConverterError     error
 	ContractAbi             string
 	LogsToConvert           []core.HeaderSyncLog
-	EntitiesToConvert       []interface{}
-	EntitiesToReturn        []interface{}
-	ModelsToReturn          []interface{}
-	ToEntitiesCalledCounter int
+	ModelsToReturn          []event.InsertionModel
+	PassedContractAddresses []string
+	SetDBCalled             bool
 	ToModelsCalledCounter   int
 }
 
-func (converter *MockConverter) ToEntities(contractAbi string, ethLogs []core.HeaderSyncLog) ([]interface{}, error) {
-	for _, log := range ethLogs {
-		converter.PassedContractAddresses = append(converter.PassedContractAddresses, log.Log.Address.Hex())
-	}
-	converter.ContractAbi = contractAbi
-	converter.LogsToConvert = ethLogs
-	return converter.EntitiesToReturn, converter.ToEntitiesError
-}
-
-func (converter *MockConverter) ToModels(entities []interface{}) ([]interface{}, error) {
-	converter.EntitiesToConvert = entities
+func (converter *MockConverter) ToModels(abi string, logs []core.HeaderSyncLog) ([]event.InsertionModel, error) {
+	converter.LogsToConvert = logs
+	converter.ContractAbi = abi
+	converter.ToModelsCalledCounter = converter.ToModelsCalledCounter + 1
 	return converter.ModelsToReturn, converter.ToModelsError
 }
 
-func (converter *MockConverter) SetToEntityConverterError(err error) {
-	converter.entityConverterError = err
-}
-
-func (converter *MockConverter) SetToModelConverterError(err error) {
-	converter.modelConverterError = err
+func (converter *MockConverter) SetDB(db *postgres.DB) {
+	converter.SetDBCalled = true
 }

libraries/shared/mocks/event_repository.go

@@ -17,17 +17,18 @@
 package mocks
 
 import (
+	"github.com/vulcanize/vulcanizedb/libraries/shared/factories/event"
 	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
 )
 
 type MockEventRepository struct {
 	createError         error
-	PassedModels        []interface{}
+	PassedModels        []event.InsertionModel
 	SetDbCalled         bool
 	CreateCalledCounter int
 }
 
-func (repository *MockEventRepository) Create(models []interface{}) error {
+func (repository *MockEventRepository) Create(models []event.InsertionModel) error {
 	repository.PassedModels = models
 	repository.CreateCalledCounter++