Add a Test for an Untransferrable ERC20 token

contracts/erc20/compiler.json

@@ -32,6 +32,7 @@
         "src/interfaces/IEtherToken.sol",
         "test/DummyERC20Token.sol",
         "test/DummyMultipleReturnERC20Token.sol",
-        "test/DummyNoReturnERC20Token.sol"
+        "test/DummyNoReturnERC20Token.sol",
+        "test/UntransferrableDummyERC20Token.sol"
     ]
 }

contracts/erc20/contracts/test/UntransferrableDummyERC20Token.sol

@@ -0,0 +1,76 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.5;
+
+import "./DummyERC20Token.sol";
+
+
+// solhint-disable no-empty-blocks
+contract UntransferrableDummyERC20Token is
+    DummyERC20Token
+{
+    bool internal _paused;
+
+    constructor (
+        string memory _name,
+        string memory _symbol,
+        uint256 _decimals,
+        uint256 _totalSupply
+    )
+        public
+        DummyERC20Token(
+            _name,
+            _symbol,
+            _decimals,
+            _totalSupply
+        )
+    {}
+
+    // /// @dev send `value` token to `to` from `msg.sender`
+    // /// @param _to The address of the recipient
+    // /// @param _value The amount of token to be transferred
+    // function transfer(address _to, uint256 _value)
+    //     external
+    //     returns (bool)
+    // {
+    //     require(
+    //         false,
+    //         "TRANSFER_DISABLED"
+    //     );
+    // }
+
+    /// @dev send `value` token to `to` from `from` on the condition it is approved by `from`
+    /// @param _from The address of the sender
+    /// @param _to The address of the recipient
+    /// @param _value The amount of token to be transferred
+    function transferFrom(
+        address _from,
+        address _to,
+        uint256 _value
+    )
+        external
+        returns (bool)
+    {
+        require(
+            false,
+            "TRANSFER_DISABLED"
+        );
+    }
+}
+