assertActivation(true, profile, newContext(null, newProperties("other", "")));
    }

    @Test
    void testWithValue_UserPropertyDominantOverSystemProperty() throws Exception {
        Profile profile = newProfile("prop", "value");

        Properties props1 = newProperties("prop", "value");
        Properties props2 = newProperties("prop", "other");

        pw.println("key3 = val3");
        pw.println("");

        MavenProperties props = new MavenProperties();
        props.load(new StringReader(sw.toString()));
        props.save(System.err);
        System.err.println("=====");

        props.put("key2", props.get("key2"));
        props.put("key3", "foo");
        props.save(System.err);
        System.err.println("=====");
    }

    @Test

        Properties props = new Properties();
        props.put("key", "user_value");
        ToolchainModel toolchain = new ToolchainModel();
        toolchain.setType("TYPE");
        toolchain.setProvides(props);
        PersistedToolchains userResult = new PersistedToolchains();
        userResult.setToolchains(Collections.singletonList(toolchain));

        props = new Properties();

                if (error != null) {
                    props.setProperty(key + ERROR_KEY_SUFFIX, error);
                } else {
                    props.remove(key + ERROR_KEY_SUFFIX);
                }

                getLogger().debug("Writing resolution-state to: " + touchfile);
                channel.truncate(0);

        return p;
    }

    private Properties newProperties(String osName, String osVersion, String osArch) {
        Properties props = new Properties();
        props.setProperty("os.name", osName);
        props.setProperty("os.version", osVersion);
        props.setProperty("os.arch", osArch);
        return props;
    }

    @Test
    void testVersionStringComparison() throws Exception {

    @Test
    public void testRecursiveExpressionCycleNPE() throws Exception {
        Map<String, String> props = new HashMap<>();
        props.put("aa", "${bb}");
        props.put("bb", "${aa}");
        DefaultModelBuildingRequest request = new DefaultModelBuildingRequest();

        Model model = Model.newBuilder().properties(props).build();

        SimpleProblemCollector collector = new SimpleProblemCollector();

                    .read(
                            new StringReader("<project>\n"
                                    + "  <properties>\n"
                                    + "    <my.prop>my-value</my.prop>\n"
                                    + "  </properties>\n"
                                    + "</project>"),
                            true,
                            new InputSource(null, "merge-input"));

                String overrideName = name.substring(OVERRIDE_PREFIX.length());
                props.put(overrideName, substVars(value, name, props, callback));
            } else {
                props.put(name, substVars(value, name, props, callback));
            }
        }
        props.keySet().removeIf(k -> k.startsWith(OVERRIDE_PREFIX));
    }

    private static MavenProperties loadPropertiesFile(

        osActivation.setOs( activationOS );

        osActivated.setActivation( osActivation );

        Properties props = System.getProperties();
        ProfileActivationContext ctx = new ProfileActivationContext( props, false );

        ProfileManager profileManager = new DefaultProfileManager( getContainer(), props );

        profileManager.addProfile( osActivated );

        List active = profileManager.getActiveProfiles( null );

            version = artifact.getVersionRange().toString();
        }

        Map<String, String> props = null;
        if (org.apache.maven.artifact.Artifact.SCOPE_SYSTEM.equals(artifact.getScope())) {
            String localPath = (artifact.getFile() != null) ? artifact.getFile().getPath() : "";
            props = Collections.singletonMap(MavenArtifactProperties.LOCAL_PATH, localPath);
        }