Merge pull request #125 from ampleforth/naguib-mock-fix

UFragments mock fix

Author: ahnaguib

contracts/mocks/MockUFragments.sol

@@ -24,8 +24,7 @@ contract MockUFragments is Mock {
         int256[] memory intVals = new int256[](1);
         intVals[0] = supplyDelta;
         emit FunctionArguments(uintVals, intVals);
-        _supply++;
-        return _supply;
+        return uint256(int256(_supply) + int256(supplyDelta));
     }
 
     function totalSupply()

test/unit/UFragmentsPolicy.js

@@ -352,10 +352,9 @@ contract('UFragmentsPolicy:Rebase', async function (accounts) {
       await mockExternalData(INITIAL_RATE_2X, INITIAL_CPI, MAX_SUPPLY);
     });
 
-    it('should fail', async function () {
-      expect(
-        await chain.isEthException(uFragmentsPolicy.rebase())
-      ).to.be.true;
+    it('should not grow', async function () {
+      r = await uFragmentsPolicy.rebase();
+      r.logs[0].args.requestedSupplyAdjustment.should.be.bignumber.eq(0);
     });
   });
 });