descriptor.setScmSourceUrl( "scm-url" );
MavenProject rootProject = ReleaseUtil.getRootProject( reactorProjects );
descriptor.setWorkingDirectory( rootProject.getFile().getParentFile().getAbsolutePath() );
descriptor.setScmReleaseLabel( "release-label" );
ScmFileSet fileSet = new ScmFileSet( rootProject.getFile().getParentFile(), rootProject.getFile() );
ScmProvider scmProviderMock = mock( ScmProvider.class );
when( scmProviderMock.checkIn( isA( ScmRepository.class ),
argThat( new IsScmFileSetEquals( fileSet ) ),
isNull( ScmVersion.class ),