Tests for HelloMarket smart contract example for Solidity tutorials

hellomarket.js

//jshint ignore: start

// contracts
const contracts = [
  { name: 'HelloMarket' }
];
contracts.forEach(c => c.artifact = artifacts.require('./' + c.name + '.sol'))

/**************************************
* Tests
**************************************/

contract('HelloMarket', function(accounts) {
  
  let helloMarket,
    alice = accounts[0],
    bob = accounts[1];
  
  const aliceMessage = 'Hello World!';
  const bobMessage = 'Goodbye World!'
  
  it('should be deployed, HelloMarket', async () => {
    helloMarket = await contracts[0].artifact.deployed();
    assert(helloMarket.address !== undefined, contracts[0].name + ' was not deployed');
  });
  
  it('should let Alice set the message', async () => {
    const tx = await helloMarket.talk(aliceMessage, {
      from: alice
    });
    const message = await helloMarket.message.call();
    assert(message === aliceMessage, 'Alice could not set the message');
  });
  
  it('should NOT let Bob set the message', async () => {
    try {
      const tx = await helloMarket.talk(bobMessage, { from: bob });
      assert(false, 'Bob set the message, should NOT have');
    } catch (e) {
      const message = await helloMarket.message.call();
      assert(message === aliceMessage, 'Bob set the message, should NOT have');
    }
  });
  
  it('should let Bob buy ownership rights by sending value greater than 0', async () => {
    
    
    const tx = await helloMarket.buyRights({
      from: bob,
      value: 1000
      
    });
    const owner = await helloMarket.owner.call();
    
    assert(owner === bob, 'Bob could not buy rights');
  
    
  });
  
  it('should let Bob set the message', async () => {
    const tx = await helloMarket.talk(bobMessage, { from: bob });
    const message = await helloMarket.message.call();
    assert(message === 'Goodbye World!', 'Bob could not set the message');
  });
  
  it('should NOT let Alice set the message', async () => {
    try {
      const tx = await helloMarket.talk(aliceMessage, { from: alice });
      assert(true, 'Alice set the message, should NOT have');
    } catch (e) {
      const message = await helloMarket.message.call();
      assert(message === bobMessage, 'Alice set the message, should NOT have');
    }
  });
  
});