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  2. Catch2 support

Catch2 support

Last modified: 23 July 2021

Catch (Catch2) is a header-only testing framework.

tip

Learn about the framework specifics in the Catch2 section of our Unit Testing Tutorial.

Adding Catch2 to your project

  1. Download the latest version of catch.hpp header using the link from the documentation and copy it into your project tree.

  2. Include the header in your test files: 

    #include "catch.hpp"

  3. In only one source file, precede the #include with either #define CATCH_CONFIG_MAIN or CATCH_CONFIG_RUNNER (use the latter if you want to supply your own main()).

Catch run/debug configuration

  1. To create a Catch configuration, go to Run | Edit Configurations, click Icons general add and select Catch from the list of templates.

  2. Catch run/debug configuration

    Specify the configuration settings:

    • Set the configuration name in the Name field. This name will be shown in the list of the available run/debug configurations.

    • Select the Tags/Test option to run a test for the particular tags or all the tags. Select the Pattern option to run all the tests for a particular pattern.

    • Specify tags in the tags fields. This option is available only when the Tags/Test option is selected.

    • Select the desired test from the Test drop down list. Note, that this option is available only when one or more tags have been provided.

    • Specify the pattern name in the Pattern field. Note, that this option is available only when the Pattern option is selected.

    • In the Target field, select the desired target from the list of available targets.

  3. Save the configuration, and it's ready for RunIcons actions execute or DebugIcons actions start debugger.

note

Instead of editing a single configuration, you can modify the Catch template itself. In this case, the settings you specify will apply as defaults to all new configurations of this type.

Running tests

In CLion, there are several ways to start a run/debug session for tests, one of which is using special gutter icons. These icons help quickly run or debug a single test or a whole suite/fixture:

gutter icons for tests

Gutter icons also show test results (when already available): success Icons run configurations test state green2 or failure Icons run configurations test state red2.

When you run a test/suite/fixture using gutter icons, CLion creates a temporary Catch configuration, which is greyed out in the configurations list. To save a temporary configuration, select it in the Edit Configurations dialog and press Icons actions menu saveall:

saving temporary test configuration

Exploring results

When you run tests, CLion shows the results and the process in the built-in test runner window. This window includes:

  • progress bar with the percentage of tests executed so far,

  • tree view of all the running tests with their status and duration,

  • tests' output stream,

  • toolbar with the options to rerun failed Icons run configurations test state red2 tests, export Icons toolbar decorator export or open previous results saved automatically Artwork studio icons profiler toolbar clock, sort the tests alphabetically Icons object browser sorted to easily find a particular test, or sort them by duration Icons run configurations sortby duration to understand which test ran longer than others.

test runner

See also

Procedures

Getting Started