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// Include web3 library so we can query accounts. |
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const Web3 = require('web3') |
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// Instantiate new web3 object pointing toward an Ethereum node. |
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let web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:8545")) |
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// Include AuthorDonation contract |
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let AuthorDonation = artifacts.require("./AuthorDonation") |
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|
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// Test with Mocha |
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contract('AuthorDonation', function(accounts) { |
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// Setup a variable to hold the contract object. |
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var authorDonation |
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// A convenience to view account balances in the console before making changes. |
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printBalances(accounts) |
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// Create a test case for retreiving the deployed contract. |
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// We pass 'done' to allow us to step through each test synchronously. |
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it("Should retrieve deployed contract.", function(done) { |
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// Check if our instance has deployed |
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AuthorDonation.deployed().then(function(instance) { |
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// Assign our contract instance for later use |
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authorDonation = instance |
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console.log('author donation', authorDonation) |
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// Pass test if we have an object returned. |
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assert.isOk(authorDonation) |
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// Tell Mocha move on to the next sequential test. |
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done() |
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}) |
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}) |
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|
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// Test for depositing 1 Ether |
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it("Should deposit 1 ether.", function(done) { |
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// Call the donate method on the contract. Since that method is tagged payable, |
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// we can send Ether by passing an object containing from, to and amount. |
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// All transactions are carried sent in wei. We use a web3 utility to convert from Ether. |
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authorDonation.donate({from:accounts[3], to:authorDonation.address, value: web3.toWei(1, "ether")}) |
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.then(function(tx) { |
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// Pass the test if we have a transaction reciept returned. |
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assert.isOk(tx.receipt) |
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// For convenience, show the balances of accounts after transaction. |
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printBalances(accounts) |
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done() |
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}, function(error) { |
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// Force an error if callback fails. |
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assert.equal(true, false) |
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console.error(error) |
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done() |
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}) |
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}) |
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|
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// Utility function to display the balances of each account. |
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function printBalances(accounts) { |
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accounts.forEach(function(ac, i) { |
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console.log(i, web3.fromWei(web3.eth.getBalance(ac), 'ether').toNumber()) |
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}) |
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} |
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}) |
