OpenCover analyzes your .NET codebase and generates an XML report rich with detail about the extent and quality of your code coverage. You think you’ve covered your testing bases, but how do you know? What if there’s actually a sneaky runner leading off second base? If so, OpenCover will blow his cover wide open. In this post I will show you how to retrofit your automated build with OpenCover. Then we’ll make the output more human-readable with Report Generator.
If you read my article about Psake , you’ll recall that I started the open source project Resfit in order to experiment with Acceptance Test Driven Development. I started the project with NCrunch and though the 30 day trial ran out, my appreciation for NCrunch’s coverage metrics did not. I found OpenCover, which generates some amazing code coverage metrics. Only trouble is, they’re all in XML - Better suited to be read by a build server than a lowly Developer like myself. That’s where ReportGenerator comes in, which “converts XML reports generated by OpenCover, PartCover, Visual Studio or NCover into human readable reports in various formats”.
What are Git hooks? Can you do anything useful with them? Also, since Git hooks come from Linux, is there anything special you need to do to get them working on Windows?
What are Git hooks? Git hooks allow you to run custom scripts whenever certain important events occur in the Git life-cycle, such as committing, merging, and pushing. Git ships with a number of sample hook scripts in the repo\.git\hooks directory, but they are disabled by default. For instance, if you open that folder you’ll find a file called pre-commit.sample. To enable it, just rename it to pre-commit by removing the .sample extension and make the script executable (chmod +x pre-commit if you’re on Linux, or just check your NTFS execute rights if you’re on Windows). When you attempt to commit using git commit, the script is found and executed. If your pre-commit script exits with a 0 (zero), you commit successfully, otherwise the commit fails.
If you take a look at the default sample pre-commit script , it does a few helpful things by default, like disallowing non-ascii filenames since they cause issues on some platforms, and checking for whitespace errors. This means that if you enable this script and have “whitespace errors”, like lines that end in spaces or tabs, you’ll fail to commit and have to remove the whitespace before you can commit.
What cool stuff can I do with Git hooks? Since you’re working with scripts, you can do pretty much anything with Git hooks. That being said, just because you can do something… Yeah, you know. Git hooks can make the behavior of common Git tasks like committing, pushing and pulling nonstandard, which can annoy people, especially if they’re just trying to get used to the glories of Git. But here are a few examples of what you might accomplish with Git hooks.
What is Psake and why do you want it? Psake is a build automation tool written in PowerShell. That means you don’t have to mess around with MSBuild scripts and trying to force procedural code into a declarative XML format - which is just weird. Psake frees you from the shackles of awkwardness. But how does it work?
With Psake, you write a PowerShell script consisting of one or more build “tasks” which you can invoke from PowerShell, or even from a continuous integration build server. You invoke your build task via the Invoke-Psake function or, more commonly, via a build.ps1 or build.bat script. Each build task can depend on zero or more other build tasks, and it’s possible to set a default build task. Each build task can do whatever you’d like, including cleaning your solution, building your assemblies, running your acceptance tests, running your unit tests, generating code coverage reports, packaging the binaries in a zip file, a NuGet package, etc. If you dream it, Psake will build it.
In 18 seconds Psake builds it, tests it, and packages it. Boom.