Function mockBalance

Set MAS balance for a given address..

Example

test('mocked balance', () => {
 const addr = 'A12BqZEQ6sByhRLyEuf0YbQmcF2PsDdkNNG1akBJu9XcjZA1eT';
const balance: u64 = 123;
mockBalance(addr.toString(), balance);
const res = balanceOf(addr);
expect(res).toBe(balance);
});