### Question:
LogManager { public static void setLogger(Logger logger) { if (logger == null) { throw new NullPointerException("Logger may not be null."); } sLogger = logger; } private  LogManager(); static void setLogger(Logger logger); static Logger getLogger(); static boolean isVerboseLoggingEnabled(); static void setVerboseLoggingEnabled(boolean enabled); static void v(String tag, String message, Object... args); static void v(Throwable t, String tag, String message, Object... args); static void d(String tag, String message, Object... args); static void d(Throwable t, String tag, String message, Object... args); static void i(String tag, String message, Object... args); static void i(Throwable t, String tag, String message, Object... args); static void w(String tag, String message, Object... args); static void w(Throwable t, String tag, String message, Object... args); static void e(String tag, String message, Object... args); static void e(Throwable t, String tag, String message, Object... args);  }### Answer:
@Test(expected = NullPointerException.class) public void canNotSetNullLogger() { LogManager.setLogger(null); }