I am in the process of writing unit tests for someone else's code. Right now, I am just sort of looking through all the classes of the main code branch to see if I have written tests to cover all cases. What sort of tools exist that could aid me in this to see how many more tests I still have to write?

  • This question is really about code coverage. Unit tests are just a way to exercise the code, for which one might want code coverage. There are many other ways to exercise code, for which one might also want code coverage.
    – Ira Baxter
    Commented Jun 6, 2015 at 9:32

4 Answers 4


StackOverflow has a rather extensive post which details many of the available code-coverage solutions for C#/.Net. Content reproduced below, and all credit should go to the users of SO:

  • NCover
  • Visual Studio (2008 Pro) | (2005 Team System (Development, Test or Team Suite Editions))
    • Well, it's Microsoft so I'd expect it to work properly
    • Fully Integrated into Visual Studio
    • At least $5,469
  • PartCover
    • Open Source
    • Supports statement coverage
  • OpenCover - successor to PartCover
    • OpenSource
    • Supports branch and statement coverage
    • 32 and 64 bit support
    • Silverlight support
    • Background
  • SD Test Coverage
    • Works with 32 and 64 bits
    • Works well in embedded systems (e.g, phones) and with Mono
    • C# versions 1.2 thru 7.2
    • Handles both small and very large code bases
    • $250 for single user license
  • JetBrains dotCover
    • $100 for Personal License
    • Supports statement coverage
    • Silverlight support
  • NCrunch

    • $159 for personal license
    • $289 for commercial seat license * Free during beta, to become commercial, pricing unknown future unknown.
    • Code coverage indicators in Visual Studio
    • Continuous (near real time) testing
    • Visual per-test code coverage
    • Performance metrics, parallell multi-core test execution
  • NDepend

    • $410 for developer license
    • NDepend can import coverage data from NCover, DotCover, Visual Studio 2013, 2012, 2010 and 2008 Code Coverage files.
    • Dependency Graph
    • Dependency Structure Matrix
    • Visualizing Code Metrics
    • Validating Code Rules

I would like to suggest one more tool.

Fine Code Coverage Its small simple and 100% free. https://marketplace.visualstudio.com/items?itemName=FortuneNgwenya.FineCodeCoverage

Disclaimer : I'm the primary developer

  • Works well for me, nice job Fortune!
    – Mathias F
    Commented May 6, 2021 at 10:56

My team and I use Typemock's Isolator. It's a unit testing framework with some nice features, one of them is code coverage. We are very satisfied with this product.


Squish Coco

  • Coverage levels up to MC/DC and MCC
  • Compare coverage delta between tests
  • Calculate optimal test execution order
  • Pre-commit and post-commit patch analysis
  • Supports C++ and C in addition
  • 300 Euros per licenses. Available in batches of five.

(Disclaimer: I'm working for the vendor of above tool)

  • 1
    Please disclose your affiliation with Squish Coco. Commented Feb 3, 2018 at 3:11
  • And also name the pricing conditions. If I'm not mistaken, this one doesn't come for free.
    – Izzy
    Commented Feb 3, 2018 at 10:35

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