fix increaseApproval in ERC827Token with tests

contracts/token/ERC827Token.sol

@@ -94,7 +94,7 @@ contract ERC827Token is ERC827, StandardToken {
   function increaseApproval(address _spender, uint _addedValue, bytes _data) public returns (bool) {
     require(_spender != address(this));
 
-    super.approve(_spender, _addedValue);
+    super.increaseApproval(_spender, _addedValue);
 
     require(_spender.call(_data));
 

test/ERC827Token.js

@@ -183,6 +183,11 @@ contract('ERC827 Token', function (accounts) {
           web3.toHex(123456), 666, 'Transfer Done'
         );
 
+        await token.approve(message.contract.address, 10);
+        new BigNumber(10).should.be.bignumber.equal(
+          await token.allowance(accounts[0], message.contract.address)
+        );
+
         const abiMethod = findMethod(token.abi, 'increaseApproval', 'address,uint256,bytes');
         const increaseApprovalData = ethjsABI.encodeMethod(abiMethod,
           [message.contract.address, 50, extraData]
@@ -193,7 +198,7 @@ contract('ERC827 Token', function (accounts) {
 
         assert.equal(2, transaction.receipt.logs.length);
 
-        new BigNumber(50).should.be.bignumber.equal(
+        new BigNumber(60).should.be.bignumber.equal(
           await token.allowance(accounts[0], message.contract.address)
         );
       });
@@ -205,6 +210,10 @@ contract('ERC827 Token', function (accounts) {
 
         await token.approve(message.contract.address, 100);
 
+        new BigNumber(100).should.be.bignumber.equal(
+          await token.allowance(accounts[0], message.contract.address)
+        );
+
         const extraData = message.contract.showMessage.getData(
           web3.toHex(123456), 666, 'Transfer Done'
         );