dotCover - How in TeamCity to create multiple coverage reports

In our previous post, we talked about how TeamCity automatically combines multiple dotCover outputs into a single code coverage report but what if we wanted to keep thoose reports seperate?

You might be thinking why would you want to do this? Don’t you want to see the overall test coverage?

The overall coverage is nice but when you have both unit tests and integration tests, or multiple test projects serving different purposes, there is a high potential that you are reporting lines of code being covered that were only called but not actually tested.

In this post, we are going to look at how in TeamCity you can run multiple test builds to generate both individual reports and still have a combined report.

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DotCover - Combine Multiple Results into Single Report

In TeamCity, what if you need to combine the code coverage results say from unit test and integration test projectsthst run as seperate build steps?

Luckily, TeamCity does this work for you but it is not obvious that it will do it for.

To get TeamCity to combine the multiple the code coverage results into a single code coverage result, you just need to add the echo command to import the data into the build like we did in our previous post

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.NET Core - Code Coverage in TeamCity

In part 1 and part 2 of of this article series, we setup and optimized our code coverage using the free command line version of dotCover.

In this post, we are going to add our code coverage to our TeamCity builds to run our unit tests with code coverage as part of the automated builds, show us the code coverage metrics summary after the build, be able to view the code coverage report right in TeamCity and add failure metrics for if code coverage percent drops.

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dotCover - Optimizing Coverage Report to Only Include Our Applications Logic

In part 1 of the ASPNET Code Coverage Using dotCover, we hooked up dotCover to our project to generate our code coverage report. It was pretty easy to hook it up but the number is not the most accurate as it includes every file that is part of the solution including our test project and all of the ASP.NET WebApi code.

When looking at code coverage, we only want to include files that make sense to test against so that our code coverage number is the most accurate. So that means we should exclude our unit tests project from the report since we are not going to run tests against our test projects. Same thing with the ASP.NET WebApi startup.cs, program.cs and Controllers as we would want to test those using integration tests and not unit tests.

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ASP.NET Core - Implementing Code Coverage with JetBrains dotCover

Having automated tests is a good thing to have to help with your code quality but having those tests without any idea of how much of your code is actually being tested is a really bad thing.

To figure out how much of our code we are actually testing, we need to create a code coverage report. To generate our code coverage report, we going to use the JetBrains dotCover tool.

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