source.setArtifactId("source-artifact");
        source.setGroupId("source-group");
        source.setVersion("2.0");
        assertFalse(target.merge(source));
        assertEquals("myArtifact", target.getArtifactId());
        assertEquals("myGroup", target.getGroupId());
        assertEquals("1.0-SNAPSHOT", target.getVersion());
    }
    /*--- END test common metadata ---*/

        when(project.getArtifactId()).thenReturn("maven-embedder");
        when(project.getPackaging()).thenReturn("jar");
        when(project.getName()).thenReturn("Apache Maven Embedder");
        when(project.getVersion()).thenReturn("3.5.4-SNAPSHOT");
        when(project.getFile()).thenReturn(new File(basedir, "maven-embedder/pom.xml"));
        when(event.getProject()).thenReturn(project);

        }
        if (result && os.getVersion() != null) {
            result = determineVersionMatch(os.getVersion());
        }
        return result;
    }

    private boolean ensureAtLeastOneNonNull(ActivationOS os) {
        return os.getArch() != null || os.getFamily() != null || os.getName() != null || os.getVersion() != null;
    }

    private boolean determineVersionMatch(String version) {

                + " It is derived from the main artifact.");
    }

    @Override
    public String getVersion() {
        return parent.getVersion();
    }

    @Override
    public void setVersion(String version) {
        throw new UnsupportedOperationException("Cannot change the version information for an attached artifact."

        clone.setRelease(artifact.isRelease());
        clone.setResolvedVersion(artifact.getVersion());
        clone.setResolved(artifact.isResolved());
        clone.setFile(artifact.getFile());

        clone.setAvailableVersions(copyList(artifact.getAvailableVersions()));
        if (artifact.getVersion() != null) {
            clone.setBaseVersion(artifact.getBaseVersion());
        }

                    model.setArtifactId(intArtifactId);
                }
                // Version
                String orgVersion = model.getVersion();
                String intVersion = interpolate(orgVersion);
                if (orgVersion != intVersion) {
                    model.setVersion(intVersion);
                }

                // Packaging
                String orgPackaging = model.getPackaging();

    @Test
    void testDefaultPolicy() throws Exception {
        MetadataGraphEdge res;

        res = policy.apply(e1, e2);
        assertEquals("1.1", res.getVersion(), "Wrong depth edge selected");

        res = policy.apply(e1, e3);
        assertEquals("1.2", res.getVersion(), "Wrong version edge selected");
    }
    // ------------------------------------------------------------------------------------------

            if (!metadata.getArtifactId().isEmpty()) {
                path.append(metadata.getArtifactId()).append('/');

                if (!metadata.getVersion().isEmpty()) {
                    path.append(metadata.getVersion()).append('/');
                }
            }
        }

        path.append(insertRepositoryKey(metadata.getType(), repositoryKey));

        return path.toString();

        }
        if (active && os.getArch() != null) {
            active = determineArchMatch(os.getArch(), actualOsArch);
        }
        if (active && os.getVersion() != null) {
            active = determineVersionMatch(os.getVersion(), actualOsVersion);
        }

        return active;
    }

    @Override

            if (!metadata.getArtifactId().isEmpty()) {
                path.append(metadata.getArtifactId()).append('/');

                if (!metadata.getVersion().isEmpty()) {
                    path.append(metadata.getVersion()).append('/');
                }
            }
        }

        path.append(insertRepositoryKey(metadata.getType(), repositoryKey));

        return path.toString();