我正在寻找一种轻松且简洁为 Delphi 下的 DUnitX 测试框架编写 spy 程序的方法。
过去,我使用过非常丑陋的方法来做到这一点:
[TestFixture]
Test = class(TObject)
public
[test]
procedure Test1;
end;
TMyClass = class(TObject)
protected
procedure MyProcedure; virtual;
end;
TMyTestClass = class(TMyClass)
protected
fMyProcedureCalled : Boolean;
procedure MyProcedure; override;
end
procedure TMyTestClass.MyProcedure;
begin
fMyProcedureCalled := true;
inherited;
end;
procedure Test.Test1;
var aObj : TMyTestClass;
begin
TMyTestClass.Create;
Assert.IsTrue(aObj.fMyProcedureCalled);
end;
所有这些代码都用于检查是否调用了过程。太啰嗦了!
有没有办法编写一个 spy 程序来帮助我减少代码?
最佳答案
听起来像是模拟的用例(我在这里使用术语模拟,因为大多数框架将其各种类型的测试 double 称为模拟)
在下面的示例中,我使用 DUnit,但它对 DUnitX 应该没有任何影响。我还使用 Spring4D 1.2 的模拟功能(我没有检查 Delphi Mocks 是否支持此功能)
unit MyClass;
interface
type
TMyClass = class
private
fCounter: Integer;
protected
procedure MyProcedure; virtual;
public
property Counter: Integer read fCounter;
end;
implementation
procedure TMyClass.MyProcedure;
begin
Inc(fCounter);
end;
end.
program Tests;
uses
TestFramework,
TestInsight.DUnit,
Spring.Mocking,
MyClass in 'MyClass.pas';
type
TMyClass = class(MyClass.TMyClass)
public
// just to make it accessible for the test
procedure MyProcedure; override;
end;
TMyTest = class(TTestCase)
published
procedure Test1;
end;
procedure TMyClass.MyProcedure;
begin
inherited;
end;
procedure TMyTest.Test1;
var
// the mock is getting auto initialized on its first use
// and defaults to TMockBehavior.Dynamic which means it lets all calls happen
m: Mock<TMyClass>;
o: TMyClass;
begin
// set this to true to actually call the "real" method
m.CallBase := True;
// do something with o
o := m;
o.MyProcedure;
// check if the expected call actually did happen
m.Received(Times.Once).MyProcedure;
// to prove that it actually did call the "real" method
CheckEquals(1, o.Counter);
end;
begin
RegisterTest(TMyTest.Suite);
RunRegisteredTests();
end.
请记住,这仅适用于虚拟方法。
关于unit-testing - 德尔福单元测试: Writing a simple spy for the CUT,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/35205850/