releaseDescriptor.setDefaultReleaseVersion( "2.1-SNAPSHOT" );
releaseDescriptor.setInteractive( false );
releaseDescriptor.setUpdateBranchVersions( true );
// test
phase.execute( releaseDescriptor, new DefaultReleaseEnvironment(), reactorProjects );
// verify
assertEquals( "Check release versions", Collections.singletonMap( "groupId:artifactId", "2.1-SNAPSHOT" ),
releaseDescriptor.getReleaseVersions() );
assertNull( "Check development versions", releaseDescriptor.getDevelopmentVersions().get( "groupId:artifactId" ) );