Visual-studio – Web Client Software Factory Unit Testing Big Fail

unit testingvisual studiowcsf

it is me again…too much question, I know, but in this I'm kind of a newbie…

Well, I have a problem creating test for a project that is built using Microsoft's Web Client Software Factory: I get a error that says:

Unable to set TestContext property for the class MyClassName. Error: System.ArgumentException: Object of type 'Microsoft.VisualStudio.TestTools.TestTypes.Unit.UnitTestAdapterContext' cannot be converted to type 'Microsoft.VisualStudio.TestTools.UnitTesting.TestContext'..

and the test never runs, any ideas?

Again, thanks in advance =)

Best Answer

What is the type of the TestContext property of your MyClassName class? According to the error message, it's the wrong type. Compare it with the tests that work.

Related Solutions

What’s the best strategy for unit-testing database-driven applications

I've actually used your first approach with quite some success, but in a slightly different ways that I think would solve some of your problems:

Keep the entire schema and scripts for creating it in source control so that anyone can create the current database schema after a check out. In addition, keep sample data in data files that get loaded by part of the build process. As you discover data that causes errors, add it to your sample data to check that errors don't re-emerge.
Use a continuous integration server to build the database schema, load the sample data, and run tests. This is how we keep our test database in sync (rebuilding it at every test run). Though this requires that the CI server have access and ownership of its own dedicated database instance, I say that having our db schema built 3 times a day has dramatically helped find errors that probably would not have been found till just before delivery (if not later). I can't say that I rebuild the schema before every commit. Does anybody? With this approach you won't have to (well maybe we should, but its not a big deal if someone forgets).
For my group, user input is done at the application level (not db) so this is tested via standard unit tests.

Loading Production Database Copy:
This was the approach that was used at my last job. It was a huge pain cause of a couple of issues:

The copy would get out of date from the production version
Changes would be made to the copy's schema and wouldn't get propagated to the production systems. At this point we'd have diverging schemas. Not fun.

Mocking Database Server:
We also do this at my current job. After every commit we execute unit tests against the application code that have mock db accessors injected. Then three times a day we execute the full db build described above. I definitely recommend both approaches.

C# “internal” access modifier when doing unit testing

Internal classes need to be tested and there is an assemby attribute:

using System.Runtime.CompilerServices;

[assembly:InternalsVisibleTo("MyTests")]

Add this to the project info file, e.g. Properties\AssemblyInfo.cs.

Best Answer

Related Solutions

What’s the best strategy for unit-testing database-driven applications

C# “internal” access modifier when doing unit testing

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