Posts Tagged 'oss'

cfix 1.6 released, simplifies authoring of multi-threaded tests

A new release of cfix, the unit testing framework for C and C++, is now available for download. Besides some minor enhancements like extending the maximum permitted fixture name, cfix 1.6 introduces a major new feature, Anonymous Thread Auto-Registration.

Since its very first release, cfix has supported multi-threaded test cases, i.e. test cases that spawn child threads, each of which potentially making use of the various assertion statements like CFIX_ASSERT. To make this work and ensure that failing assertions are handled properly, however, usage of CfixCreateThread (rather than the native Win32 CreateThread) was mandatory when spawning such threads.

Although using CfixCreateThread (or CfixCreateSystemThread in case of kernel mode code) remains the preferred way to create child threads, there are situations where usage of this API is not possible — for example, when the child threads are created by libraries such as boost.

To support such scenarios, cfix now allows you to annotate a fixture to enable Anonymous Thread Auto-Registration, which means that newly spawned threads are automatically registered with cfix — no usage of CfixCreateThread required. Thanks to this feature, writing multi-threaded tests becomes straightforward — and integrating with libraries such as boost does not pose a problem any more.

For more details about this feature, please refer to the respective section in the cfix documentation.

As always, updated binaries and source code are available on Sourceforge.

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cfix 1.2 introduces improved C++ support

cfix 1.2, which has been released today, introduces a number of new features, the most prominent being improved support for C++ and additional execution options.

New C++ API

To date, cfix has primarily focussed on C as the programming language to write unit tests in. Although C++ has always been supported, cfix has not made use of the additional capabilities C++ provides. With version 1.2, cfix makes C++ a first class citizen and introduces an additional API that leverages the benefits of C++ and allows writing test cases in a more convenient manner.

Being implemented on top of the existing C API, the C++ API is not a replacement, but rather an addition to the existing API set.

As the following example suggests, fixtures can now be written as classes, with test cases being implemented as methods:

#include <cfixcc.h>

class ExampleTest : public cfixcc::TestFixture
{
public:
  void TestOne() 
  {}
  
  void TestTwo() 
  {}
};

CFIXCC_BEGIN_CLASS( ExampleTest )
  CFIXCC_METHOD( TestOne )
  CFIXCC_METHOD( TestTwo )
CFIXCC_END_CLASS()

To learn more about the definition of fixtures, have a look at the respective TestFixture chapter in the cfix documentation.

Regarding the implementation of test cases, cfix adds a new set of type-safe, template-driven assertions that, for instance, allow convenient equality checks:

void TestOne() 
{
  const wchar_t* testString = L"test";
  
  //
  // Use typesafe assertions...
  //
  CFIXCC_ASSERT_EQUALS( 1, 1 );
  CFIXCC_ASSERT_EQUALS( L"test", testString );
  CFIXCC_ASSERT_EQUALS( wcslen( testString ), ( size_t ) 4 );
  
  //
  // ...log messages...
  //
  CFIX_LOG( L"Test string is %s", testString );
  
  //
  // ...or use the existing "C" assertions.
  //
  CFIX_ASSERT( wcslen( testString ) == 4 );
  CFIX_ASSERT_MESSAGE( testString[ 0 ] == 't', 
    L"Test string should start with a 't'" );
}

Again, have a look at the updated API reference for an overview of the new API additions.

Customizing Test Runs

Another important new feature is the addition of the new switches -fsf (Shortcut Fixture), -fsr (Shortcut Run), and -fss (Shortcut Run On Failing Setup). Using these switches allows you to specify how a test run should resume when a test case fails.

When a test case fails, the default behavior of cfix is to report the failure, and resume at the next test case. By specifying -fsf, however, the remaining test cases of the same fixture will be skipped and execution resumes at the next fixture. With -fsr, cfix can be requirested to abort the entire run as soon as a single test case fails.

What else is new in 1.2?

Download

As always, cfix 1.2 is source and binary compatible to previous versions. The new MSI package and source code can now be downloaded on Sourceforge.

cfix is open source and licensed under the GNU Lesser General Public License.


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About me

Johannes Passing, M.Sc., living in Berlin, Germany.

Besides his consulting work, Johannes mainly focusses on Win32, COM, and NT kernel mode development, along with Java and .Net. He also is the author of cfix, a C/C++ unit testing framework for Win32 and NT kernel mode, Visual Assert, a Visual Studio Unit Testing-AddIn, and NTrace, a dynamic function boundary tracing toolkit for Windows NT/x86 kernel/user mode code.

Contact Johannes: jpassing (at) acm org

Johannes' GPG fingerprint is BBB1 1769 B82D CD07 D90A 57E8 9FE1 D441 F7A0 1BB1.

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