### Question:
AlwaysMatchingMatcher implements Matcher { @Override public boolean matches(String s1, String s2) { return true; }  @Override int getCost(); @Override boolean matches(String s1, String s2); @Override boolean isExact(); @Override String getExecutionReport(); static int COST; }### Answer:
@Test public void testNullMatches() throws Exception { Matcher matcher = new AlwaysMatchingMatcher(); assertTrue(matcher.matches(null, null)); }