Code Coverage

Develop. Test. Cover!

For C and C++

Testwell CTC++ was originally developed for source code in the C language. It supports C++ for over 30 years and continuously keeps pace with its highly dynamic language standards.

The C language family has some special challenges for coverage measurement:

• Source code in header files - this is merged for all of its copies by Testwell CTC++.
• Use of macros - Testwell CTC++ instruments the already preprocessed code and thus gains access to the complete macro content.
• Code variants through preprocessing: In safety-critical software development, variants must be tested separately. Testwell CTC++ recognizes variants and identifies them separately.

An add-on is available for the Java language.

Safety-Critical Software Development

When human lives are at risk, various safety standards such as ISO 26262 in the automotive sector or DO-178C in aviation require the measurement of code coverage.

Several hundred companies worldwide use Testwell CTC++ in this development environment to cover all coverage requirements of their standard up to the highest required level of MC/DC.

Testwell CTC++ is certified by TÜV Süd for functional safety in accordance with IEC 61508, ISO26262, EN 50716 and IEC 62304. With our Safety Package, we support you in your tool qualification.

Embedded Software

The coverage measurement for software on embedded targets has some specific challenges:

Application Software

The coverage measurement for Windows, Linux and macOS applications is very easy and convenient with Testwell CTC++

• Slight increase in build time
• Supplied libraries for writing out coverage data
• High-performance and scalable reporting

Applications in the kernel mode of the operating system are treated like embedded targets with Testwell CTC++, with an adaptable runtime library.

Integration

Testwell CTC++ can be integrated into almost any development and test environment. As a collection of command line tools, it works with any level of automation

• on build servers and CI solutions,
• on developer computers,
• centrally or distributed according to the process steps instrumentation - test - reporting.

In order to integrate the source code instrumentation into the build process, very often no additional build configuration is necessary.

Testwell CTC++ offers integrations in IDEs such as Visual Studio and the IAR Embedded Workbench. In many other IDEs, the work steps can be integrated via configuration.

This is what our users say

Thousands of satisfied users worldwide rely on Testwell CTC++.Selected testimonials:

Support for our users

The Verifysoft support team offers our customers comprehensive support with the installation, configuration and use of Testwell CTC++.

As documentation, we provide comprehensive help, the Testwell CTC++ Help, as part of the installation and as an online version.

In addition to normal support, we are also happy to provide you with consulting services or implementation support so that you can do the coverage measurement for your project as quickly and efficiently as possible!

Flexible Reporting

Our HTML report offers overview views and shows the details of the coverage measurement in the source code. Its reporting levels can be configured to suit the project.

Testwell CTC++ creates all coverage reports based on templates and thus supports all text-based formats such as XML, CSV or JSON. This way, third-party systems such as dashboards can easily be supplied with the required data.

Missing coverage is explained and documented via Justifications. Testwell CTC++ shows the impact of Justifications on all coverage measures - so it is clear and transparent whether 100% of the code has been tested or at least explained. Watch our video on Justifications to learn more.

Testing

All types of tests, whether unit tests, integration tests or complete system tests, can be carried out as usual. Testing can be done fully automated, partially automated or manually.

The instrumented program or test executable writes the data to a file during testing. When the test is executed on a target, this writing out is fully customizable; the data can, for example, be transferred directly to the host.

With Testwell CTC++, all test runs of a project can be combined into a single report. It works with all common unit test tools, test platforms and frameworks.

Coverage Measures

Testwell CTC++ offers all coverage measures required by various safety standards:

• Function Coverage
• Statement Coverage
• Decision / Branch Coverage
• Condition Coverage
• MC/DC: Modified Condition / Decision Coverage
• Multicondition Coverage

Executed, non-executed and only partially executed lines of code are visually highlighted (Line Coverage).

You can find a detailed explanation of the individual measures in our Testwell CTC++ Help.