Add combinatorial tests for internal Exchange functions (#807)

* WIP add combinatorial tests for internal Exchange functions

* Change combinitorial testing strategy based on feedback

* Check value of filled[orderHash] in updateFilledState tests

* Add combinatorial tests for addFillResults

* Add combinatorial tests for getPartialAmount

* Implement generic `testWithReferenceFuncAsync`

* Implement generic `testCombinatoriallyWithReferenceFuncAsync`

* Add combinatorial tests for isRoundingError

* Add combinatorial tests for calculateFillResults

* Add support for Geth in internal contract tests

* Fix contract artifacts

* Change DECIMAL_PLACES to 78 and add a note.

* Document new functions in utils

* Optimize tests by only reseting state when needed

* Rename/move some files

* Print parameter names on failure in testWithReferenceFuncAsync

* Add to changelog for utils package

* Appease various linters

* Rename some more things related to FillOrderCombinatorialUtils

* Remove .only from test/exchange/internal.ts

* Remove old test for isRoundingError and getPartialAmount

* Appease linters again

* Remove old todos

* Fix typos, add comments, rename some things

* Re-add some LibMath tests

* Update contract internal tests to use new SafeMath revert reasons

* Apply PR feedback from Amir

* Apply PR feedback from Remco

* Re-add networks to ZRXToken artifact

* Remove duplicate Whitelist in compiler.json

1 files changed, 1 insertions, 7 deletions

diff --git a/packages/migrations/artifacts/2.0.0/WETH9.json b/packages/migrations/artifacts/2.0.0/WETH9.json
index 5b9e11425..721dbe291 100644
--- a/packages/migrations/artifacts/2.0.0/WETH9.json
+++ b/packages/migrations/artifacts/2.0.0/WETH9.json
@@ -326,11 +326,5 @@
 			}
 		}
 	},
-	"networks": {
-		"50": {
-			"address": "0x0b1ba0af832d7c05fd64161e0db78e85978e8082",
-			"links": {},
-			"constructorArgs": "[]"
-		}
-	}
+	"networks": {}
 }
\ No newline at end of file