@0x/contracts-test-utils: Add number_utils.ts and hexSize().

contracts/test-utils/src/index.ts

@@ -28,7 +28,17 @@ export { bytes32Values, testCombinatoriallyWithReferenceFunc, uint256Values } fr
 export { TransactionFactory } from './transaction_factory';
 export { MutatorContractFunction, TransactionHelper } from './transaction_helper';
 export { testWithReferenceFuncAsync } from './test_with_reference';
-export { hexConcat, hexHash, hexLeftPad, hexInvert, hexSlice, hexRandom, hexRightPad, toHex } from './hex_utils';
+export {
+    hexConcat,
+    hexHash,
+    hexLeftPad,
+    hexInvert,
+    hexSlice,
+    hexRandom,
+    hexRightPad,
+    hexSize,
+    toHex,
+} from './hex_utils';
 export {
     BatchMatchOrder,
     ContractName,
@@ -51,3 +61,12 @@ export { blockchainTests, BlockchainTestsEnvironment, describe } from './mocha_b
 export { chaiSetup, expect } from './chai_setup';
 export { getCodesizeFromArtifact } from './codesize';
 export { shortZip } from './lang_utils';
+export {
+    assertIntegerRoughlyEquals,
+    assertRoughlyEquals,
+    getRandomFloat,
+    getRandomInteger,
+    getRandomPortion,
+    getNumericalDivergence,
+    toBaseUnitAmount,
+} from './number_utils';