Question

I have an Action as follows:

public PartialViewResult MyActionIWantToTest(string someParameter) 
{
    // ... A bunch of logic
    return PartialView("ViewName", viewModel);
}

When I inspect the result, It has a few properties, but they are either null, or empty.
The only property that has anything is the ViewEngineCollection which doesn’t contain anything specific to my method.

Does anyone have some example code that tests a PartialViewResult?

Answer 1

Say you have an Action that looks something like this:

public PartialViewResult MyActionIWantToTest(string someParameter)
{
   var viewModel = new MyPartialViewModel { SomeValue = someParameter };
   return PartialView("MyPartialView", viewModel);
}

Note: MyPartialViewModel is a simple class with only one property – SomeValue.

An NUnit example may look like this:

[Test]
public void MyActionIWantToTestReturnsPartialViewResult()
{
    // Arrange
    const string myTestValue = "Some value";
    var ctrl = new StringController();

    // Act
    var result = ctrl.MyActionIWantToTest(myTestValue);

    // Assert
    Assert.AreEqual("MyPartialView", result.ViewName);
    Assert.IsInstanceOf<MyPartialViewModel>(result.ViewData.Model);
    Assert.AreEqual(myTestValue, ((MyPartialViewModel)result.ViewData.Model).SomeValue);
}