smart contract test case using async await

'use strict';

const DataStore = artifacts.require('../contracts/DataStore.sol');
const Organisation = artifacts.require('../contracts/Organisation.sol');
const sha3 = require('solidity-sha3').default;


contract('Organisation', function(accounts) {
    let bookStore, memberStore, org;

    beforeEach(async function() {
        bookStore = await DataStore.new();
        memberStore = await DataStore.new();
        org = await Organisation.new({value: web3.toWei(0.1)});
        // Transfer ownership of stores from default account to organisation. This allows modifying the data store.
        bookStore.transferOwnership(org.address);
        memberStore.transferOwnership(org.address);
        await org.setDataStore(bookStore.address, memberStore.address);
        await org.addMember('name', 'email', accounts[0]);
        // await org.setDataStore(0x0, 0x0);
        // TODO Investigate why org works with 0x0 data stores too.
    });

    describe('addMember', function() {
        it('should add the member', async function() {
            let count = await org.memberCount();
            assert.equal(count.valueOf(), 1);
            let member = await org.getMember(1);
            let attr = member.split(';');
            assert.equal(attr[0], '1');
            assert.equal('0x' + attr[1], accounts[0]);
            assert.equal(attr[2], '0');
            assert.isAtMost(attr[3], Math.floor(Date.now() / 1000));
            assert.isAbove(attr[3], Math.floor(Date.now() / 1000) - 300);
        });
        it('should not add the member again', async function() {
            let count = await org.memberCount();
            assert.equal(count.valueOf(), 1);

            let res = await org.addMember('name', 'email', accounts[0]);
            assert.equal(res.logs[0].args.statusCode.c[0], 102);
        });
    });
});