add dummy test

contracts/scripts/ganacheHelper.js

@@ -0,0 +1,45 @@
+function send(method, params = []) {
+  return new Promise((resolve, reject) => {
+    web3.currentProvider.send({
+      jsonrpc: '2.0',
+      id: Date.now(),
+      method,
+      params
+    }, (err, res) => {
+      return err ? reject(err) : resolve(res);
+    });
+  });
+}
+
+const takeSnapshot = async seconds => {
+  return await send('evm_snapshot');
+}
+
+const revertSnapshot = async (id) => {
+  await send('evm_revert', [id]);
+}
+
+const mineBlock = async (timestamp) => {
+  await send('evm_mine', [timestamp]);
+}
+
+const increaseTime = async (seconds) => {
+  await send('evm_increaseTime', [seconds]);
+}
+
+const minerStop = async () => {
+  await send('miner_stop', []);
+}
+
+const minerStart = async () => {
+  await send('miner_start', []);
+}
+
+module.exports = {
+  takeSnapshot,
+  revertSnapshot,
+  mineBlock,
+  minerStop,
+  minerStart,
+  increaseTime,
+};