Introduce framework for running basic tests for entities (#1344)

* Introduce framework for running basic tests for entities

* Add pipeline tests to CircleCI config

* Make pipeline tests more configurable and fix CircleCI config

* Add coverage dir to pipeline package

* Add basic tests for all exchange event entities

* Add tests for remaining entities

* Create separate test scripts in package.json and add new info to README

* Update db_setup.ts to revert migrations even if you are using docker

* Automatically pull the postgres image if needed

* Add comment about why NumberToBigIntTransformer is needed

1 files changed, 1 insertions, 15 deletions

diff --git a/packages/pipeline/src/utils/index.ts b/packages/pipeline/src/utils/index.ts
index b6d84a565..918cfc695 100644
--- a/packages/pipeline/src/utils/index.ts
+++ b/packages/pipeline/src/utils/index.ts
@@ -1,5 +1,5 @@
 import { BigNumber } from '@0x/utils';
-import { ValueTransformer } from 'typeorm/decorator/options/ValueTransformer';
+export * from './transformers';
 
 /**
  * If the given BigNumber is not null, returns the string representation of that
@@ -36,20 +36,6 @@ export function handleError(e: any): void {
     process.exit(1);
 }
 
-class BigNumberTransformer implements ValueTransformer {
-    // tslint:disable-next-line:prefer-function-over-method
-    public to(value: BigNumber): string {
-        return value.toString();
-    }
-
-    // tslint:disable-next-line:prefer-function-over-method
-    public from(value: string): BigNumber {
-        return new BigNumber(value);
-    }
-}
-
-export const bigNumberTransformer = new BigNumberTransformer();
-
 /**
  * Returns the unix timestamp of the current hour
  */