Removed redundant modifiers from CappedToken. (#969)

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 }));
+    });
+  });
+}