chevron-thin-right chevron-thin-left brand cancel-circle search youtube-icon google-plus-icon linkedin-icon facebook-icon twitter-icon toolbox download check linkedin phone twitter-old google-plus facebook profile-male chat calendar profile-male
Ask a question
The Unit Testing Company
Development Resources
Knowledge Base
Welcome to Typemock Community! Here you can ask and receive answers from other community members. If you liked or disliked an answer or thread: react with an up- or downvote.

Related questions

Database Fake Entites

0 votes
Hi @all,
first off all I'm new in Typemock and I'm still trying out something.

I have the Following RepoManager 

public class RepositoryManager
    {
        public DatabaseEntities _db = new DatabaseEntities();
      /// <exception cref="System.ArgumentNullException">source oder selector ist null.</exception>
        public string getData(string name)
        {
            return _db.DataBaseTable.Where(f => f.NAME.Equals(name)).Select(f => f.NAME).FirstOrDefault();
        }
}


And my Test. 

        [Isolated]
        [TestMethod()]
        public void DatenholenTesttest()
        {
            var target = Isolate.Fake.Instance<RepositoryManager>();
            var fakeEntities = Isolate.Fake.Instance<DatabaseEntities>();
            target._db = fakeEntities;
            Isolate.WhenCalled(() => target._db.DataBaseTables).WillReturnCollectionValuesOf(_inMemoryObjects.AsQueryable());
            var  actual = target.getData("test1");
            var expected = "test1";
            Assert.AreEqual(expected, actual);
          
        }


Actual is still Empty. Can any body tell me what's wrong with my Testcode?

kind regards
asked by rednose84
Report User
 (640 points)

2 Answers

0 votes
Hi,

You didn't mention what it is you are trying to do so in case I got you wrong, correct me.

I've made some assumptions in order to fill in the missing pieces:

1) DataBaseTable and DataBaseTables is the same class.
2) _inMemoryObjects.AsQueryable() is a Queryable collection set to have "test1" in it.

In this case what I would do is: 


[TestMethod() , Isolated]
public void DatenholenTesttest()
{
    var fakeEntities = Isolate.Fake.Instance<DatabaseEntities>();
    Isolate.WhenCalled(() => fakeEntities.DataBaseTables).WillReturnCollectionValuesOf(_inMemoryObjects.AsQueryable());
    Isolate.Swap.NextInstance<DatabaseEntities>().With(fakeEntities);
  
    var target = new RepositoryManager();
    var actual = target.GetData("test1");

    var expected = "test1";
    Assert.AreEqual(expected, actual);
}


We use Swap.NextInstance() in order to assign fakeEntities to _db (when the _db is created using new), that's why we created fakeEntities and set the behavior of fakeEntities.DataBaseTables to return a queryable collection.

When _db.DataBaseTable.Where(..) called inside target.GetData(..). is the same as writing
_inMemoryObjects.AsQueryable().Where(f => f.NAME.Equals(name)).Select(f => f.NAME).FirstOrDefault();

If you have more question try to send me all the relevant details.
Please let me know if that helps.
answered by alex
Report User
 (17k points)
0 votes
Wow, that it is.. Perfect.. your assumptions are right.. and Swap was the right way...

Thanks a lot.
answered by rednose84
Report User
 (640 points)
...

Products

Help

Company

Community

Contact

Typemock Store (US toll FREE 866–895–4680). Copyright © 2006 Typemock Inc. All rights reserved. Terms of Use.