### Question:
Utils { public static void printSection (final String section) { String s = getSection(section); Log.i("-", ""); Log.i("-", s); } protected  Utils(); static String getSection(final String section); static void printSection(final String section);  }### Answer:
@Test (expected = NullPointerException.class) public void testPrintNullSection () { Utils.printSection(null); }
@Test (expected = IllegalArgumentException.class) public void testPrintEmptySection () { Utils.printSection(""); }
@Test public void testPrintSection () { Utils.printSection("my-section"); }