Lesson 23: Collecting code coverage from your tests

[samuelematias]

Description

PR with Lesson 23.

How to install LCOV on:

• macOS brew install lcov
• Linux sudo apt-get install lcov
• Windows

To generate de coverage report:

flutter test --coverage

Now, check your root project, and you will see a new folder with the name coverage, and inside this folder a file with the name lcov.info.

If you open this file, will see something like that, hard to understand:

Then, after install the LCOV, run this command:

genhtml ./coverage/lcov.info -o coverage

And will be generated this, inside the coverage folder:

Now, let's check the real coverage report, running this command:

open coverage/index.html

And an HTML page will open in your browser:

Now, if you check one of these files, you’ll see that you don’t have 100% test coverage. If you open one of these files, you will see a red line in some part of your code, and that red line my friend (probably) is the part that remains to be tested to reach approximately or 100% test coverage in that file.

Types of changes

• Fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Improvement (non-breaking change which adds Improvements)