classdef BankAccountTest < matlab.unittest.TestCase
    % Tests the BankAccount class.
    
    methods (TestClassSetup)
        function addBankAccountClassToPath(testCase)
            p = path;
            testCase.addTeardown(@path,p);
            addpath(fullfile(matlabroot,'help','techdoc','matlab_oop',...
                'examples'));
        end
    end
    
    methods (Test)
        function testConstructor(testCase)
            b = BankAccount(1234, 100);
            testCase.verifyEqual(b.AccountNumber, 1234, ...
                'Constructor failed to correctly set account number');
            testCase.verifyEqual(b.AccountBalance, 100, ...
                'Constructor failed to correctly set account balance');
        end
        
        function testConstructorNotEnoughInputs(testCase)
            import matlab.unittest.constraints.Throws;
            testCase.verifyThat(@()BankAccount, ...
                Throws('MATLAB:minrhs'));
        end
        
        function testDesposit(testCase)
            b = BankAccount(1234, 100);
            b.deposit(25);
            testCase.verifyEqual(b.AccountBalance, 125);
        end
        
        function testWithdraw(testCase)
            b = BankAccount(1234, 100);
            b.withdraw(25);
            testCase.verifyEqual(b.AccountBalance, 75);
        end
        
        function testNotifyInsufficientFunds(testCase)
            callbackExecuted = false;
            function testCallback(~,~)
                callbackExecuted = true;
            end
            
            b = BankAccount(1234, 100);
            b.addlistener('InsufficientFunds', @testCallback);
            
            b.withdraw(50);
            testCase.assertFalse(callbackExecuted, ...
                'The callback should not have executed yet');
            b.withdraw(60);
            testCase.verifyTrue(callbackExecuted, ...
                'The listener callback should have fired');
        end
    end
end

Running BankAccountTest
.....
Done BankAccountTest
__________