Blastn { private Blastn() { } private  Blastn(); static Iterable<HighScoringPair> blastn(final File sourceFile, final File targetFile);  }
@Test(expected=NullPointerException.class) public void testBlastnNullSourceFile() throws Exception { blastn(null, targetFile); }
@Test(expected=NullPointerException.class) public void testBlastnNullTargetFile() throws Exception { blastn(sourceFile, null); }