Removed redundant modifiers from CappedToken. (#969)

contracts/mocks/RBACCappedTokenMock.sol

@@ -0,0 +1,13 @@
+pragma solidity ^0.4.23;
+
+import "../token/ERC20/RBACMintableToken.sol";
+import "../token/ERC20/CappedToken.sol";
+
+contract RBACCappedTokenMock is CappedToken, RBACMintableToken {
+  constructor(    
+    uint256 _cap
+  )    
+    CappedToken(_cap)
+    public
+  {}
+}

contracts/token/ERC20/CappedToken.sol

@@ -26,8 +26,6 @@ contract CappedToken is MintableToken {
     address _to,
     uint256 _amount
   )
-    onlyOwner
-    canMint
     public
     returns (bool)
   {

test/token/ERC20/CappedToken.behaviour.js

@@ -0,0 +1,28 @@
+import expectThrow from '../../helpers/expectThrow';
+
+export default function ([owner, anotherAccount, minter, cap]) {
+  describe('capped token', function () {
+    const from = minter;
+
+    it('should start with the correct cap', async function () {
+      let _cap = await this.token.cap();
+
+      assert(cap.eq(_cap));
+    });
+
+    it('should mint when amount is less than cap', async function () {
+      const result = await this.token.mint(owner, cap.sub(1), { from });
+      assert.equal(result.logs[0].event, 'Mint');
+    });
+
+    it('should fail to mint if the ammount exceeds the cap', async function () {
+      await this.token.mint(owner, cap.sub(1), { from });
+      await expectThrow(this.token.mint(owner, 100, { from }));
+    });
+
+    it('should fail to mint after cap is reached', async function () {
+      await this.token.mint(owner, cap, { from });
+      await expectThrow(this.token.mint(owner, 1, { from }));
+    });
+  });
+}

test/token/ERC20/CappedToken.test.js

@@ -1,36 +1,17 @@
-
-import expectThrow from '../../helpers/expectThrow';
 import ether from '../../helpers/ether';
+import shouldBehaveLikeMintableToken from './MintableToken.behaviour';
+import shouldBehaveLikeCappedToken from './CappedToken.behaviour';
 
 var CappedToken = artifacts.require('CappedToken');
 
-contract('Capped', function (accounts) {
-  const cap = ether(1000);
-
-  let token;
-
+contract('Capped', function ([owner, anotherAccount]) {
+  const _cap = ether(1000);
+  
   beforeEach(async function () {
-    token = await CappedToken.new(cap);
-  });
-
-  it('should start with the correct cap', async function () {
-    let _cap = await token.cap();
-
-    assert(cap.eq(_cap));
+    this.token = await CappedToken.new(_cap, { from: owner });
   });
 
-  it('should mint when amount is less than cap', async function () {
-    const result = await token.mint(accounts[0], 100);
-    assert.equal(result.logs[0].event, 'Mint');
-  });
+  shouldBehaveLikeCappedToken([owner, anotherAccount, owner, _cap]);
 
-  it('should fail to mint if the ammount exceeds the cap', async function () {
-    await token.mint(accounts[0], cap.sub(1));
-    await expectThrow(token.mint(accounts[0], 100));
-  });
-
-  it('should fail to mint after cap is reached', async function () {
-    await token.mint(accounts[0], cap);
-    await expectThrow(token.mint(accounts[0], 1));
-  });
+  shouldBehaveLikeMintableToken([owner, anotherAccount, owner]);
 });

test/token/ERC20/RBACCappedToken.test.js

@@ -0,0 +1,19 @@
+import ether from '../../helpers/ether';
+import shouldBehaveLikeRBACMintableToken from './RBACMintableToken.behaviour';
+import shouldBehaveLikeMintableToken from './MintableToken.behaviour';
+import shouldBehaveLikeCappedToken from './CappedToken.behaviour';
+
+const RBACCappedTokenMock = artifacts.require('RBACCappedTokenMock');
+
+contract('RBACCappedToken', function ([owner, anotherAccount, minter]) {
+  const _cap = ether(1000);
+
+  beforeEach(async function () {
+    this.token = await RBACCappedTokenMock.new(_cap, { from: owner });
+    await this.token.addMinter(minter, { from: owner });
+  });
+
+  shouldBehaveLikeMintableToken([owner, anotherAccount, minter]);
+  shouldBehaveLikeRBACMintableToken([owner, anotherAccount]);
+  shouldBehaveLikeCappedToken([owner, anotherAccount, minter, _cap]);
+});

test/token/ERC20/RBACMintableToken.behaviour.js

@@ -0,0 +1,28 @@
+import expectThrow from '../../helpers/expectThrow';
+
+const ROLE_MINTER = 'minter';
+
+export default function ([owner, anotherAccount]) {
+  describe('handle roles', function () {
+    it('owner can add and remove a minter role', async function () {
+      await this.token.addMinter(anotherAccount, { from: owner });
+      let hasRole = await this.token.hasRole(anotherAccount, ROLE_MINTER);
+      assert.equal(hasRole, true);
+
+      await this.token.removeMinter(anotherAccount, { from: owner });
+      hasRole = await this.token.hasRole(anotherAccount, ROLE_MINTER);
+      assert.equal(hasRole, false);
+    });
+
+    it('another account can\'t add or remove a minter role', async function () {
+      await expectThrow(
+        this.token.addMinter(anotherAccount, { from: anotherAccount })
+      );
+
+      await this.token.addMinter(anotherAccount, { from: owner });
+      await expectThrow(
+        this.token.removeMinter(anotherAccount, { from: anotherAccount })
+      );
+    });
+  });
+};

test/token/ERC20/RBACMintableToken.test.js

@@ -1,8 +1,7 @@
-import expectThrow from '../../helpers/expectThrow';
+import shouldBehaveLikeRBACMintableToken from './RBACMintableToken.behaviour';
 import shouldBehaveLikeMintableToken from './MintableToken.behaviour';
-const RBACMintableToken = artifacts.require('RBACMintableToken');
 
-const ROLE_MINTER = 'minter';
+const RBACMintableToken = artifacts.require('RBACMintableToken');
 
 contract('RBACMintableToken', function ([owner, anotherAccount, minter]) {
   beforeEach(async function () {
@@ -10,28 +9,6 @@ contract('RBACMintableToken', function ([owner, anotherAccount, minter]) {
     await this.token.addMinter(minter, { from: owner });
   });
 
-  describe('handle roles', function () {
-    it('owner can add and remove a minter role', async function () {
-      await this.token.addMinter(anotherAccount, { from: owner });
-      let hasRole = await this.token.hasRole(anotherAccount, ROLE_MINTER);
-      assert.equal(hasRole, true);
-
-      await this.token.removeMinter(anotherAccount, { from: owner });
-      hasRole = await this.token.hasRole(anotherAccount, ROLE_MINTER);
-      assert.equal(hasRole, false);
-    });
-
-    it('another account can\'t add or remove a minter role', async function () {
-      await expectThrow(
-        this.token.addMinter(anotherAccount, { from: anotherAccount })
-      );
-
-      await this.token.addMinter(anotherAccount, { from: owner });
-      await expectThrow(
-        this.token.removeMinter(anotherAccount, { from: anotherAccount })
-      );
-    });
-  });
-
+  shouldBehaveLikeRBACMintableToken([owner, anotherAccount, minter]);
   shouldBehaveLikeMintableToken([owner, anotherAccount, minter]);
 });