### Question:
ProjectServiceImpl extends ServiceSupport implements ProjectService { public boolean projectExists(final String projectName) { checkProjectName(projectName); return getProjectNames().contains(projectName); } @Inject  ProjectServiceImpl(final SecurityService securityService); AbstractProject<?, ?> getProject(final UUID id); AbstractProject<?, ?> getProject(final String projectName); AbstractProject<?, ?> getProjectByFullName(final String projectName); AbstractProject<?, ?> findProject(final UUID id); AbstractProject<?, ?> findProject(final String projectName); AbstractProject<?, ?> findProjectByFullName(final String projectName); @SuppressWarnings("rawtypes") List<AbstractProject> getAllProjects(); T copyProject(final T src, final String targetProjectName); TopLevelItem createProjectFromXML(final String projectName, final InputStream xml); boolean projectExists(final String projectName); Collection<String> getProjectNames();  }### Answer:
@Test(expected = NullPointerException.class) public void projectExistsNullArg() { getInst().projectExists(null); }