Organize test files following contracts folders structure

test/token/MintableToken.test.js

@@ -0,0 +1,44 @@
+
+import expectThrow from '../helpers/expectThrow';
+var MintableToken = artifacts.require('../contracts/Tokens/MintableToken.sol');
+
+contract('Mintable', function (accounts) {
+  let token;
+
+  beforeEach(async function () {
+    token = await MintableToken.new();
+  });
+
+  it('should start with a totalSupply of 0', async function () {
+    let totalSupply = await token.totalSupply();
+
+    assert.equal(totalSupply, 0);
+  });
+
+  it('should return mintingFinished false after construction', async function () {
+    let mintingFinished = await token.mintingFinished();
+
+    assert.equal(mintingFinished, false);
+  });
+
+  it('should mint a given amount of tokens to a given address', async function () {
+    const result = await token.mint(accounts[0], 100);
+    assert.equal(result.logs[0].event, 'Mint');
+    assert.equal(result.logs[0].args.to.valueOf(), accounts[0]);
+    assert.equal(result.logs[0].args.amount.valueOf(), 100);
+    assert.equal(result.logs[1].event, 'Transfer');
+    assert.equal(result.logs[1].args.from.valueOf(), 0x0);
+
+    let balance0 = await token.balanceOf(accounts[0]);
+    assert(balance0, 100);
+
+    let totalSupply = await token.totalSupply();
+    assert(totalSupply, 100);
+  });
+
+  it('should fail to mint after call to finishMinting', async function () {
+    await token.finishMinting();
+    assert.equal(await token.mintingFinished(), true);
+    await expectThrow(token.mint(accounts[0], 100));
+  });
+});