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TMyClass包含两个参考。对 anIList<integer>的引用和对 的引用IMyInterface。的嘲笑IList<integer>是没有必要的。该框架可能经过良好测试,行为可预测,因此我可以将其视为数据对象。但是IMyInterface是一个未经测试的服务,所以我应该在单元测试中模拟它。我想检查内存泄漏,所以我想在主体销毁后测试引用的 RefCount-s 的修改。IList<integer>以正确方式更改的“RefCount” 。但我不能对被嘲笑的人说同样的话IMyInterface(在我的解决方案中)。我如何测试引用不会导致内存泄漏?或者像这样的测试是一个集成测试,我应该总是用真实的实例来测试它吗?

unit Unit1;


interface

uses
    DUnitX.TestFramework
  , Spring.Collections
  , Spring.Mocking
  ;

type
IMyInterface = interface ( IInvokable )
  ['{76B13784-6CCF-4A87-882C-E624F003B082}']
  procedure foo;
end;

TMyClass = class
  private
    fList : IList<integer>;
    fMyInterface : IMyInterface;

  public
    constructor Create( list_ : IList<integer>; myInterface_ : IMyInterface );

end;

[TestFixture]
TMyClassTest = class
  protected
    function getInterfaceRefCount( const interface_ : IInterface ) : integer;

  public
    [Test]
    procedure listRefCountTest;
    [Test]
    procedure myInterfaceRefCountTest;

end;

implementation

uses
  System.SysUtils
  ;

constructor TMyClass.Create( list_ : IList<integer>; myInterface_ : IMyInterface );
begin
  inherited Create;
  fList := list_;
  fMyInterface := myInterface_;
end;

function TMyClassTest.getInterfaceRefCount( const interface_ : IInterface ) : integer;
begin
  result := ( interface_ as TInterfacedObject ).RefCount;
end;

procedure TMyClassTest.listRefCountTest;
var
  list : IList<integer>;
  myInterfaceMock : Mock<IMyInterface>;
  myClass : TMyClass;
  listRefCount : integer;
begin
  list := TCollections.CreateList<integer>;
  myClass := TMyClass.Create( list, myInterfaceMock );
  try
    listRefCount := getInterfaceRefCount( list );
  finally
    FreeAndNIL( myClass );
  end;
  Assert.AreEqual( listRefCount-1, getInterfaceRefCount( list ) );
end;

procedure TMyClassTest.myInterfaceRefCountTest;
var
  list : IList<integer>;
  myInterfaceMock : Mock<IMyInterface>;
  myClass : TMyClass;
  myInterfaceRefCount : integer;
begin
  list := TCollections.CreateList<integer>;
  myClass := TMyClass.Create( list, myInterfaceMock );
  try
    myInterfaceRefCount := getInterfaceRefCount( myInterfaceMock.Instance );
  finally
    FreeAndNIL( myClass );
  end;
  Assert.AreEqual( myInterfaceRefCount-1, getInterfaceRefCount( myInterfaceMock.Instance ) );
end;

initialization
  TDUnitX.RegisterTestFixture(TMyClassTest);

end.
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1 回答 1

1

内存泄漏检查不需要明确进行 - 我建议使用https://github.com/shadow-cs/delphi-leakcheck - 它可以与 DUnit 或 DUnitX 无缝集成,并自动为您提供所需的所有信息当发生泄漏时(与仅告诉您“存在 x 字节泄漏”相反,开箱即用的 DUnit 通过简单地比较运行测试之前和之后分配的字节来实现)

于 2022-01-03T14:39:15.507 回答