### Question:
DynamicFilters implements JsonSerializable { public Set<String> determineTests( final Map<String, ConsumableTestDefinition> definedTests, final Set<String> requiredTests ) { return definedTests.entrySet().stream() .filter(entry -> entry.getValue() != null) .filter(entry -> !requiredTests.contains(entry.getKey())) .filter(entry -> matches(entry.getKey(), entry.getValue())) .map(Map.Entry::getKey) .collect(Collectors.toSet()); } DynamicFilters(); @JsonCreator  DynamicFilters(final Collection<? extends DynamicFilter> filters); @SafeVarargs static void registerFilterTypes(final Class<? extends DynamicFilter>... types); @SuppressWarnings("unchecked") static Class<? extends DynamicFilter>[] getFilterTypes(); Set<String> determineTests(
            final Map<String, ConsumableTestDefinition> definedTests,
            final Set<String> requiredTests
    ); final boolean matches(
            @Nullable final String testName,
            final ConsumableTestDefinition testDefinition
    ); Collection<DynamicFilter> asCollection(); @Override boolean equals(final Object o); @Override int hashCode(); @Override void serialize(final JsonGenerator gen, final SerializerProvider serializers); @Override void serializeWithType(final JsonGenerator gen, final SerializerProvider serializers, final TypeSerializer typeSer);  }### Answer:
@Test public void testEmptySetOfFilters() { final DynamicFilters filters = new DynamicFilters(); assertEquals( Collections.emptySet(), filters.determineTests( Collections.<String, ConsumableTestDefinition>emptyMap(), Collections.<String>emptySet() ) ); assertEquals( Collections.emptySet(), filters.determineTests( ImmutableMap.of( "sometest", new ConsumableTestDefinition(), "sometest2", new ConsumableTestDefinition() ), Sets.newHashSet( "sometest" ) ) ); }
@Test public void testRequiredTestsShouldBeIgnored() { final DynamicFilters filters = new DynamicFilters(Arrays.asList(new AnyMatchFilter())); assertEquals( Collections.emptySet(), filters.determineTests( Collections.<String, ConsumableTestDefinition>emptyMap(), Collections.<String>emptySet() ) ); assertEquals( Sets.newHashSet("non-required"), filters.determineTests( ImmutableMap.of( "non-required", new ConsumableTestDefinition(), "required", new ConsumableTestDefinition() ), Sets.newHashSet( "required" ) ) ); }
@Test public void testPrefixFilters() { final DynamicFilters filters = new DynamicFilters( Arrays.asList( new TestNamePrefixFilter("abc_"), new TestNamePrefixFilter("def_"), new TestNamePrefixFilter("abc_def_") ) ); assertEquals( Sets.newHashSet("abc_def_ghi", "def_ghi", "abc_"), filters.determineTests( ImmutableMap.of( "abc_", new ConsumableTestDefinition(), "def_ghi", new ConsumableTestDefinition(), "abc_def_ghi", new ConsumableTestDefinition(), "abcdef", new ConsumableTestDefinition(), "ghi_abc", new ConsumableTestDefinition() ), Collections.<String>emptySet() ) ); }
@Test public void testTestTypeFilters() { final DynamicFilters filters = new DynamicFilters( Arrays.asList( new TestTypeFilter(TestType.RANDOM), new TestTypeFilter(TestType.EMAIL_ADDRESS) ) ); assertEquals( Sets.newHashSet("random", "email"), filters.determineTests( ImmutableMap.of( "random", constructTestDefinition(TestType.RANDOM), "email", constructTestDefinition(TestType.EMAIL_ADDRESS), "user", constructTestDefinition(TestType.ANONYMOUS_USER), "account", constructTestDefinition(TestType.AUTHENTICATED_USER) ), Collections.<String>emptySet() ) ); }