In short, AutoFixture.AutoMoq is an extension that turns [AutoFixture][1] into an [Auto-Mocking Container][2] using the [Moq][3] dynamic mock library.

There&#39;s also a similar extension for AutoFixture that enables auto-mocking with [Rhino Mocks][4].

This article introduces auto-mocking for AutoFixture: http://blog.ploeh.dk/2010/08/19/AutoFixtureAsAnAutomockingContainer.aspx.

Here&#39;s a couple of follow-ups:

- http://blog.ploeh.dk/2010/08/25/ChangingTheBehaviorOfAutoFixtureAutomockingWithMoq.aspx
- http://blog.ploeh.dk/2010/11/13/RhinoMocksbasedAutomockingWithAutoFixture.aspx


  [1]: https://github.com/AutoFixture
  [2]: http://blog.ploeh.dk/2013/03/11/auto-mocking-container/
  [3]: http://code.google.com/p/moq/
  [4]: http://ayende.com/projects/rhino-mocks.aspx

I am new to Haskell, sorry if this is a basic question.

I currently have a list of Int&#39;s and I am trying to create a function that takes a variable x and returns a boolean depending whether the variable exists in the list.

I have had a search and found Data.List find function but this dosent seem to return a boolean.

I am using GHCi.

Thanks,

Haskell: Check if Int is in a list of Int&#39;s

Some background info: I was looking to run a script on a Red Hat server to read some data from /dev/random and use the Perl unpack() command to convert it to a hex string for usage later on (benchmarking database operations).  I ran a few &quot;head -1&quot; on /dev/random and it seemed to be working out fine, but after calling it a few times, it would just kinda hang.  After a few minutes, it would finally output a small block of text, then finish.

I switched to /dev/urandom (I really didn&#39;t want to, its slower and I don&#39;t need that quality of randomness) and it worked fine for the first two or three calls, then it too began hang.
I was wondering if it was the &quot;head&quot; command that was bombing it, so I tried doing some simple I/O using Perl, and it too was hanging.
As a last ditch effort, I used the &quot;dd&quot; command to dump some info out of it directly to a file instead of to the terminal.  All I asked of it was 1mb of data, but it took 3 minutes to get ~400 bytes before I killed it.

I checked the process lists, CPU and memory were basically untouched.  What exactly could cause /dev/random to crap out like this and what can I do to prevent/fix it in the future?


*Edit:* Thanks for the help guys!  It seems that I had random and urandom mixed up.  I&#39;ve got the script up and running now.  Looks like I learned something new today. :)

/dev/random Extremely Slow?

I was looking at nuget and wanted to import moq when I noticed AutoFixture AutoMoq. I see that AutoFixture is to help write TDD faster but I can&#39;t find any examples of AutoMoq and how it is different then AutoFixture.


Can someone point me to this AutoMoq so I can see what it is doing.

What is AutoFixture AutoMoq?

<p>I was looking at nuget and wanted to import moq when I noticed AutoFixture AutoMoq. I see that AutoFixture is to help write TDD faster but I can't find any examples of AutoMoq and how it is different then AutoFixture.</p>
<p>Can someone point me to this AutoMoq so I can see what it is doing.</p>


    public void SubmitMessagesToQueue_OneMessage_SubmitSuccessfully()
    {
        var messageServiceClientMock = new Mock&lt;IMessageServiceClient&gt;();
        var queueableMessage = CreateSingleQueueableMessage();
        var message = queueableMessage[0];
        var xml = QueueableMessageAsXml(queueableMessage);
        messageServiceClientMock.Setup(proxy =&gt; proxy.SubmitMessage(xml)).Verifiable();
        //messageServiceClientMock.Setup(proxy =&gt; proxy.SubmitMessage(It.IsAny&lt;XmlElement&gt;())).Verifiable();

        var serviceProxyFactoryStub = new Mock&lt;IMessageServiceClientFactory&gt;();
        serviceProxyFactoryStub.Setup(proxyFactory =&gt; proxyFactory.CreateProxy()).Returns(essageServiceClientMock.Object);
        var loggerStub = new Mock&lt;ILogger&gt;();

        var client = new MessageClient(serviceProxyFactoryStub.Object, loggerStub.Object);
        client.SubmitMessagesToQueue(new List&lt;IMessageRequestDTO&gt; {message});

        //messageServiceClientMock.Verify(proxy =&gt; proxy.SubmitMessage(xml), Times.Once());
        messageServiceClientMock.Verify();
    }

I&#39;m starting using Moq and struggling a bit.
I&#39;m trying to verify that messageServiceClient is receiving the right parameter, which is an XmlElement, but I can&#39;t find any way to make it work. It works only when I don&#39;t check a particular value.

Any ideas?

Partial answer:
I&#39;ve found a way to test that the xml sent to the proxy is correct, but I still don&#39;t think it&#39;s the right way to do it.

    public void SubmitMessagesToQueue_OneMessage_SubmitSuccessfully()
    {
        var messageServiceClientMock = new Mock&lt;IMessageServiceClient&gt;();
        messageServiceClientMock.Setup(proxy =&gt; proxy.SubmitMessage(It.IsAny&lt;XmlElement&gt;())).Verifiable();
        var serviceProxyFactoryStub = new Mock&lt;IMessageServiceClientFactory&gt;();
        serviceProxyFactoryStub.Setup(proxyFactory =&gt; proxyFactory.CreateProxy()).Returns(messageServiceClientMock.Object);
        var loggerStub = new Mock&lt;ILogger&gt;();

        var client = new MessageClient(serviceProxyFactoryStub.Object, loggerStub.Object);
        var message = CreateMessage();
        client.SubmitMessagesToQueue(new List&lt;IMessageRequestDTO&gt; {message});

        messageServiceClientMock.Verify(proxy =&gt; proxy.SubmitMessage(It.Is&lt;XmlElement&gt;(xmlElement =&gt; XMLDeserializer&lt;QueueableMessage&gt;.Deserialize(xmlElement).Messages.Contains(message))), Times.Once());
    }

By the way, how could I extract the expression from the Verify call?

Verifying a specific parameter with Moq

In the past, I have only used Rhino Mocks, with the typical strict mock.  I am now working with Moq on a project and I am wondering about the proper usage.

Let&#39;s assume that I have an object Foo with method Bar which calls a Bizz method on object Buzz.

In my test, I want to verify that Bizz is called, therefore I feel there are two possible options:

With a strict mock

    var mockBuzz= new Mock&lt;IBuzz&gt;(MockBehavior.Strict);
    mockBuzz.Setup(x =&gt; x.Bizz()); //test will fail if Bizz method not called
    foo.Buzz = mockBuzz
    foo.Bar();
    mockBuzz.VerifyAll();
    
With a loose mock

    var mockBuzz= new Mock&lt;IBuzz&gt;();    
    foo.Buzz = mockBuzz
    foo.Bar();
    mockBuzz.Verify(x =&gt; x.Bizz()) //test will fail if Bizz method not called

Is there a standard or normal way of doing this?

Moq, strict vs loose usage

I&#39;m very new to unit testing and mocking! I&#39;m trying to write some unit tests that covers some code that interacts with a data store. Data access is encapsulated by IRepository&lt;T&gt;:

    interface IRepository&lt;T&gt; {
        ....
        IEnumerable&lt;T&gt; FindBy(Expression&lt;Func&lt;T, bool&gt;&gt; predicate);
        ....
    }

The code that I&#39;m trying to test, utilising a concrete IoC&#39;d implementation of IRepository looks like this:

    public class SignupLogic {
        private Repository&lt;Company&gt; repo = new Repository&lt;Company&gt;();
      
        public void AddNewCompany(Company toAdd) {
            Company existingCompany = this.repo.FindBy(c =&gt; c.Name == toAdd.Name).FirstOrDefault();
        
            if(existingCompany != null) {
                throw new ArgumentException(&quot;Company already exists&quot;);
            }

            repo.Add(Company);
            repo.Save();
        }
    }

So that I&#39;m testing the logic of SignupLogic.AddNewCompany() itself, rather than the logic and the concrete Repository, I&#39;m mocking up IRepository and passing it into SignupLogic. The mocked up Repository looks like this:

    Mock&lt;Repository&gt; repoMock = new Mock&lt;Repository&gt;();
    repoMock.Setup(moq =&gt; moq.FindBy(c =&gt; c.Name == &quot;Company Inc&quot;)....

which returns an in-memory IEnumberable containing a Company object with name set to &quot;Company Inc&quot;. The unit test that calls SignupLogic.AddNewCompany sets up a company with duplicate details and trys to pass that in, and I assert that an ArgumentException is thrown with the message &quot;Company already exists&quot;. This test isn&#39;t passing.

Debugging through the unit test and AddNewCompany() as it runs, it would appear that existingCompany is always null. In desperation, I&#39;ve found that if I update SignupLogic.AddNewCompany() so that the call to FindBy looks like this:

    Company existingCompany = this.repo.FindBy(c =&gt; c.Name == &quot;Company Inc&quot;).FirstOrDefault();

the test passes, which suggests to me that Moq is only responding to code that is *exactly* the same as I&#39;ve setup in my test fixture. Obviously that&#39;s not especially useful in testing that any duplicate company is rejected by SignupLogic.AddNewCompany.

I&#39;ve tried setting up moq.FindBy(...) to use &quot;Is.ItAny&lt;string&gt;&quot;, but that doesn&#39;t cause the test to pass either.

From everything I&#39;m reading, it would appear that testing Expressions as I&#39;m trying to isn&#39;t actually do-able with Moq here. Is it possible? Please help!

Moq&#39;ing methods where Expression&lt;Func&lt;T, bool&gt;&gt; are passed in as parameters

I have an interface

    public interface IDataProvider
    {
        T GetDataDocument&lt;T&gt;(Guid document) where T:class, new()
    }

I&#39;d like to mock it in a way, that it would just return a new instance of a given type, regardless of the exact type, something like:

    myMock.Setup(m =&gt; m.GetDataDocument&lt;It.IsAny&lt;Type&gt;()&gt;(It.IsAny&lt;Guid&gt;()))
    .Returns(() =&gt; new T());

(which doesn&#39;t work of course, because I cannot just give any type parameter to moq, and I can&#39;t know which type must be returned.

Any ideas on this one?

Mocking generic method call for any given type parameter

What is the difference between the SetupGet() and Setup() methods for MOQ?

Setup() vs SetupGet()

I&#39;m trying to verify that a method within a mock is called with an expected object parameter.  I&#39;m using Moq, nUnit, and thinking that AutoFixture&#39;s Likeness should get the job done.
Below is a simplified version of what i&#39;m trying to do.  

Is there a way to do this with AutoFixture?  Is there a better way to verify that `Something` is called with the appropriate parameter?

Overriding Equals in the `A` class to compare the property values and changing the `Verify` line to:

    barMock.Verify(m =&gt; m.Something(a));
passes, however I&#39;d rather not override Equals in every class like A in my project. 

    namespace Test
    {
        using Moq;
        using NUnit.Framework;
        using Ploeh.SemanticComparison.Fluent;
    
        public class A
        {
            public int P1 { get; set; }
        }
        public interface IBar
        {
            void Something(A a);
        }
    
        public class Foo
        {
            public A Data { get; private set; }
            public void DoSomethingWith(IBar bar)
            {
                Data = new A { P1 = 1 };
                bar.Something(Data);
            }
        }
    
        [TestFixture]
        public class AutoFixtureTest
        {
            [Test]
            public void TestSample()
            {
                var foo = new Foo();
                var barMock = new Mock&lt;IBar&gt;();
                var a = new A { P1 = 1 };
                var expectedA = a.AsSource().OfLikeness&lt;A&gt;();
    
                foo.DoSomethingWith(barMock.Object);
    
                expectedA.ShouldEqual(foo.Data);   // passes
                barMock.Verify(m =&gt; m.Something(expectedA.Value));  // fails
            }
        }
    }

Using Verify to confirm expected parameter values in Moq mock class

When using AutoFixture&#39;s Build method for some type, how can I limit the length of the strings generated to fill that object&#39;s string properties/fields?

AutoFixture - configure fixture to limit string generation length

Before starting, I&#39;m a big fan of AutoFixture, I&#39;m still in the curve of learning how to use the tool. So thanks for having developed Autofixture Mr Ploeh and all the contributors.

So let&#39;s start with my question.

According to
https://stackoverflow.com/questions/13484471/autofixture-automoq-ignores-injected-instance-frozen-mock

The interesting part of the above link is given this code

    Mock&lt;ISettings&gt; settingsMock = new Mock&lt;ISettings&gt;();
    settingsMock.Setup(s =&gt; s.Get(settingKey)).Returns(xmlString);

    ISettings settings = settingsMock.Object;
    fixture.Inject(settings);

To which Mark answer it can be rewritten to 

    fixture.Freeze&lt;Mock&lt;ISettings&gt;&gt;()
           .Setup(s =&gt; s.Get(settingKey)).Returns(xmlString);

It looks like a syntaxic sugar, using Freeze method is a way to write in fluent interface the creation of the mock, the configuration, and the injection in autofixture container.

After doing some research on the web, there&#39;re actually a functional difference between Freeze and Inject. I found this question:
https://github.com/AutoFixture/AutoFixture/issues/59
which point the answer to 
https://stackoverflow.com/questions/12218206/how-can-i-freeze-a-null-instance-in-autofixture/12219355#12219355

The author of the link above describe Freeze method as the following:

&gt; Internally, Freeze creates an instance of the requested type (e.g.
&gt; IPayPalConfiguration) and then injects it so it will always return
&gt; that instance when you request it again

I understand that when we do

    var customer = fixture.Freeze&lt;Order&gt;();

it will always use the same instance of Order whenever our code request an Order type. But what if I specify in Freeze constructor that I want it to use a specific instance ? 

Here&#39;s a little code example:

    [Fact]
    public void MethodeName()
    {
        var fixture = new Fixture().Customize(new AutoMoqCustomization());
        fixture.Freeze&lt;OrderLine&gt;(new OrderLine(&quot;Foo&quot;));
        var order = fixture.Create&lt;Order&gt;();
    }

    public class Order
    {
        private readonly OrderLine _line;

        public Order(OrderLine line)
        {
            _line = line;
        }
    }
    public class OrderLine
    {
        private readonly string _name;

        public OrderLine(string name)
        {
            _name = name;
        }
    }

Shouldn&#39;t the name of OrderLine be equal to &quot;Foo&quot; instead of namefe48163a-d5a0-49a5-b349-7b11ba5f804b ? The documentation of Freeze method say:

    &lt;typeparam name=&quot;T&quot;&gt;The type to freeze.&lt;/typeparam&gt;
    &lt;param name=&quot;fixture&quot;&gt;The fixture.&lt;/param&gt;
    &lt;param name=&quot;seed&quot;&gt;Any data that adds additional information when creating the anonymous object. Hypothetically, this value might be the value being frozen, but this is not likely.&lt;/param&gt;

why is the author not sure when the value is returned ? If I specify, my instance in the constructor of Freeze, I&#39;m expecting autofixture to use this instance ?

then

&gt;Please notice that the &lt;paramref name=&quot;seed&quot;/&gt; isn&#39;t likely to be used as the frozen value, unless you&#39;ve customized &lt;paramref name=&quot;fixture&quot;/&gt; to do this. If you wish to inject a specific value into the Fixture, you should use the &lt;see cref=&quot;M:Ploeh.AutoFixture.FixtureRegistrar.Inject``1(Ploeh.AutoFixture.IFixture,``0)&quot;/&gt; method instead.`

It seems like I have to customize the seed parameter. Can anyone clarify ? The solution pointed by documentation is to use Inject method. And indeed, it works in my code example with OrderLine.

I&#39;m looking for your help to understand the difference between Freeze, Inject, and also Register which, according to the source code, is just called by Inject method but it takes a lambda.

Can&#39;t grasp the difference between Freeze/Inject/Register

I&#39;m new to xUnit.net and AutoFixture.

I&#39;m currently working on a &quot;testproject&quot; to get familiar with xUnit.net and Autofixture.
There is one little thing I don&#39;t understand.

What is the difference between `[Fact]` and `[Theory, AutoMoqData]`?

Could you please tell me if the following two pieces of code are equal?
I&#39;m asking this because the Test succeeds with both, but I want to learn it the right way.

    [Fact]
    public void UpdateVersionWillUpdateCorrectlyInRepository()
    {
        var fixture = new Fixture().Customize(new AutoMoqCustomization());
        var contract = fixture.Create&lt;VersionContract&gt;();
        var version = fixture.Create&lt;Version&gt;();

        fixture.Freeze&lt;Mock&lt;IContractMapper&gt;&gt;()
            .Setup(r =&gt; r.Map(contract)).Returns(version);

        var repMock = fixture.Freeze&lt;Mock&lt;VersionRepository&gt;&gt;();

        var sut = fixture.Create&lt;VersionManagementService&gt;();

        sut.UpdateVersion(contract);

        repMock.Verify(r =&gt; r.UpdateVersion(version));
    }

and

    [Theory, AutoMoqData]
    public void UpdateVersionWillUpdateCorrectlyInRepository(
        VersionContract contract,
        Version version,
        [Frozen]Mock&lt;IContractMapper&gt; mapMock,
        [Frozen]Mock&lt;VersionRepository&gt; repMock,
        VersionManagementService sut)
    {
        mapMock.Setup(r =&gt; r.Map(contract)).Returns(version);
    
        sut.UpdateVersion(contract);
    
        repMock.Verify(r =&gt; r.UpdateVersion(version));
    }

What makes me think that there is a difference are the Keywords `[Fact]` and `[Theory]`.

I&#39;m assuming that the `[Theory]` Keywords tells the xUnit.net framework that the supplied data comes from somewhere, where somewhere is Autofixture. Whereas `[Fact]` tells xUnit nothing about the origin of the data and I need to build the objects manually.

Content Type	Original Author	Original Content on Stackoverflow
Question	chobo2	View Question on Stackoverflow
Solution 1 - Moq	Mark Seemann	View Answer on Stackoverflow

What is AutoFixture AutoMoq?

Moq Problem Overview

Moq Solutions

Solution 1 - Moq

/dev/random Extremely Slow?

Haskell: Check if Int is in a list of Int's

Attributions