}

    @Override
    @BeforeEach
    public void setUp() throws Exception {
        super.setUp();
        EmptyLifecycleBindingsInjector.useEmpty();
    }

        EmptyLifecycleBindingsInjector.lifecycleRegistry = lifecycleRegistry;
        EmptyLifecycleBindingsInjector.packagingRegistry = packagingRegistry;
    }

    public static void useEmpty() {
        lifecycleRegistry = EMPTY_LIFECYCLE_REGISTRY;
        packagingRegistry = EMPTY_PACKAGING_REGISTRY;
    }

    private static Plugin newPlugin(String artifactId, String... goals) {

        EmptyLifecycleBindingsInjector.lifecycleRegistry = lifecycleRegistry;
        EmptyLifecycleBindingsInjector.packagingRegistry = packagingRegistry;
    }

    public static void useEmpty() {
        lifecycleRegistry = EMPTY_LIFECYCLE_REGISTRY;
        packagingRegistry = EMPTY_PACKAGING_REGISTRY;
    }

    private static Plugin newPlugin(String artifactId, String... goals) {

    @BeforeEach
    void setUp() throws Exception {
        testDirectory = new File(getBasedir(), BASE_POM_DIR);
        new File(getBasedir(), BASE_MIXIN_DIR);
        EmptyLifecycleBindingsInjector.useEmpty();
    }

    /**
     * Will throw exception if url is empty. MNG-4050
     *
     * @throws Exception in case of issue
     */
    @Test
    void testEmptyUrl() throws Exception {

    assertThat(certificatePinner.findMatchingPins("example.com.notexample.com")).isEmpty()
    assertThat(certificatePinner.findMatchingPins("notexample.com")).isEmpty()
    assertThat(certificatePinner.findMatchingPins("example.com")).isEmpty()
    assertThat(certificatePinner.findMatchingPins("a.b.example.com")).isEmpty()

    assertThat(graph.adjacentNodes(N2)).isEmpty();
    assertThat(graph.predecessors(N2)).isEmpty();
    assertThat(graph.successors(N2)).isEmpty();
    assertThat(graph.incidentEdges(N2)).isEmpty();
    assertThat(graph.adjacentNodes(N4)).isEmpty();
    assertThat(graph.predecessors(N4)).isEmpty();
    assertThat(graph.successors(N4)).isEmpty();
    assertThat(graph.incidentEdges(N4)).isEmpty();

    assertNodeNotInGraphErrorMessage(

        this.groupId = (groupId != null && !groupId.isEmpty()) ? groupId : null;
        this.artifactId = (artifactId != null && !artifactId.isEmpty()) ? artifactId : null;
        this.classifier = (classifier != null && !classifier.isEmpty()) ? classifier : null;
        this.extension = (extension != null && !extension.isEmpty()) ? extension : null;
        this.version = (version != null && !version.isEmpty()) ? version : null;

        buffer.append((groupId != null && !groupId.isEmpty()) ? groupId : "[unknown-group-id]");
        buffer.append(':');
        buffer.append((artifactId != null && !artifactId.isEmpty()) ? artifactId : "[unknown-artifact-id]");
        buffer.append(':');
        buffer.append((version != null && !version.isEmpty()) ? version : "[unknown-version]");

        return buffer.toString();
    }

	Prefix  string
	And     And
	Tag     Tag

	// Caching tags, only once
	cachedTags map[string]string
}

// IsEmpty returns true if filter is not set
func (f Filter) IsEmpty() bool {
	return f.And.isEmpty() && f.Tag.IsEmpty() && f.Prefix == ""
}

// MarshalXML - produces the xml representation of the Filter struct
// only one of Prefix, And and Tag should be present in the output.

			default:
				return errUnknownXMLTag
			}
		}
	}
	return nil
}

// IsEmpty returns true if Filter is not specified in the XML
func (f Filter) IsEmpty() bool {
	return !f.set
}

// Validate - validates the filter element
func (f Filter) Validate() error {
	if f.IsEmpty() {
		return errXMLNotWellFormed
	}
	// A Filter must have exactly one of Prefix, Tag,