1 files changed, 16 insertions, 0 deletions
diff --git a/packages/contracts/src/utils/assertions.ts b/packages/contracts/src/utils/assertions.ts
index 615e648f3..e702a3200 100644
--- a/packages/contracts/src/utils/assertions.ts
+++ b/packages/contracts/src/utils/assertions.ts
@@ -1,3 +1,4 @@
+import { RevertReason } from '@0xproject/types';
 import * as chai from 'chai';
 import * as _ from 'lodash';
 
@@ -52,6 +53,21 @@ export function expectRevertOrAlwaysFailingTransactionAsync<T>(p: Promise<T>): P
 }
 
 /**
+ * Rejects if the given Promise does not reject with the given revert reason or "always
+ * failing transaction" error.
+ * @param p the Promise which is expected to reject
+ * @param reason a specific revert reason
+ * @returns a new Promise which will reject if the conditions are not met and
+ * otherwise resolve with no value.
+ */
+export function expectRevertReasonOrAlwaysFailingTransactionAsync<T>(
+    p: Promise<T>,
+    reason: RevertReason,
+): PromiseLike<void> {
+    return _expectEitherErrorAsync(p, 'always failing transaction', reason);
+}
+
+/**
  * Rejects if the given Promise does not reject with a "revert" or "Contract
  * call failed" error.
  * @param p the Promise which is expected to reject