Sender_test.js

pragma solidity >=0.4.22 <0.7.0;
import "remix_tests.sol"; // this import is automatically injected by Remix
import "remix_accounts.sol";
import "./Sender.sol";
// Inherit 'Sender' contract
contract SenderTest is Sender {
    address account0;
    address account1;
    address account2;
    
    /// Initiate accounts variable
    function beforeAll() public {
        account0 = TestsAccounts.getAccount(0);
        account1 = TestsAccounts.getAccount(1);
        account2 = TestsAccounts.getAccount(2);
    }
    
    /// Test if initial owner is set correctly
    function testInitialOwner() public {
        // account-0 is default account, so current owner should be account0
        Assert.equal(getOwner(), account0, 'owner should be account-0');
    }
    
    /// Update owner. This method will be called by account0 as there is not custom sender appointed
    function updateOwnerOnce() public {
        // check method call is as expected
        Assert.ok(msg.sender == account0, 'caller should default account i.e. account0');
        // update owner address to account1
        updateOwner(account1);
        // check if owner is set to expected account
        Assert.equal(getOwner(), account1, 'owner should be updated to account1');
    }
    
    /// Update owner again by defining custom sender
    /// #sender: account-1
    function updateOwnerOnceAgain() public {
        // check if caller is custom and is as expected
        Assert.ok(msg.sender == account1, 'caller should be custom account i.e. account1');
        // update owner address to account2. This will be successful because account1 is current owner & caller both
        updateOwner(account2);
        // check if owner is set to expected account i.e. account2
        Assert.equal(getOwner(), account2, 'owner should be updated to account2');
    }
}