Time Helpers, add tests

test/mocks/TimeHelpersMock.sol

@@ -0,0 +1,22 @@
+pragma solidity 0.4.18;
+
+import "../../contracts/lib/misc/TimeHelpers.sol";
+
+
+contract TimeHelpersMock is TimeHelpers {
+    function getBlockNumberExt() public view returns (uint256) {
+        return getBlockNumber();
+    }
+
+    function getBlockNumber64Ext() public view returns (uint64) {
+        return getBlockNumber64();
+    }
+
+    function getTimestampExt() public view returns (uint256) {
+        return getTimestamp();
+    }
+
+    function getTimestamp64Ext() public view returns (uint64) {
+        return getTimestamp64();
+    }
+}

test/time_helpers.js

@@ -0,0 +1,15 @@
+contract('TimeHelpers test', accounts => {
+  let timeHelpersMock
+
+  before(async () => {
+    timeHelpersMock = await artifacts.require('TimeHelpersMock').new()
+  })
+
+  it('checks block number', async () => {
+    assert.equal((await timeHelpersMock.getBlockNumberExt.call()).toString(), (await timeHelpersMock.getBlockNumber64Ext.call()).toString(), "block number should match")
+  })
+
+  it('checks time stamp', async () => {
+    assert.equal((await timeHelpersMock.getTimestampExt.call()).toString(), (await timeHelpersMock.getTimestamp64Ext.call()).toString(), "time stamp should match")
+  })
+})