### Question:
X509Bundle implements BundleSource<X509Bundle> { public boolean hasX509Authority(@NonNull final X509Certificate x509Authority) { return x509Authorities.contains(x509Authority); } X509Bundle(@NonNull final TrustDomain trustDomain);  X509Bundle(@NonNull final TrustDomain trustDomain, @NonNull final Set<X509Certificate> x509Authorities); static X509Bundle load(@NonNull final TrustDomain trustDomain, @NonNull final Path bundlePath); static X509Bundle parse(@NonNull final TrustDomain trustDomain, @NonNull final byte[] bundleBytes); @Override X509Bundle getBundleForTrustDomain(@NonNull final TrustDomain trustDomain); Set<X509Certificate> getX509Authorities(); boolean hasX509Authority(@NonNull final X509Certificate x509Authority); void addX509Authority(@NonNull final X509Certificate x509Authority); void removeX509Authority(@NonNull final X509Certificate x509Authority);  }### Answer:
@Test void testHasAuthority_nullArgument_throwsNullPointerException() { X509Bundle x509Bundle = new X509Bundle(TrustDomain.of("example.org")); try { x509Bundle.hasX509Authority(null); fail(); } catch (NullPointerException e) { assertEquals("x509Authority is marked non-null but is null", e.getMessage()); } }