// a parameter.

                value = properties.getProperty(expression);
            }

            if ((value == null) && ((project != null) && (project.getProperties() != null))) {
                value = project.getProperties().getProperty(expression);
            }
        }

        if (value instanceof String) {

        assertEquals(System.getProperty("user.dir"), value);
    }

    @Test
    void testValueExtractionFromSystemPropertiesWithMissingProject() throws Exception {
        String sysprop = "PPEET_sysprop1";

        Properties executionProperties = new Properties();

        if (executionProperties.getProperty(sysprop) == null) {
            executionProperties.setProperty(sysprop, "value");
        }

                new File(System.getProperty("basedir", "."), "target/local-repo").getAbsoluteFile());
    }

    public ArtifactRepository createDefaultRemoteRepository() throws InvalidRepositoryException {
        return new MavenArtifactRepository(
                DEFAULT_REMOTE_REPO_ID,
                "file://"
                        + new File(System.getProperty("basedir", "."), "src/test/remote-repo")

        String timestampFormat = DEFAULT_BUILD_TIMESTAMP_FORMAT;

        Properties modelProperties = model.getProperties();
        if (modelProperties != null) {
            timestampFormat = modelProperties.getProperty(BUILD_TIMESTAMP_FORMAT_PROPERTY, timestampFormat);
        }

        ValueSource modelValueSource1 = new PrefixedObjectValueSource(PROJECT_PREFIXES, model, false);

            if (project.hasLifecyclePhase("test-compile")) {
                return new File(project.getBuild().getTestOutputDirectory());
            }
        } else {
            String type = artifact.getProperty("type", "");
            File outputDirectory = new File(project.getBuild().getOutputDirectory());

            // Check if the project is being built during this session, and if we can expect any output.

        String sysprop = "PPEET_sysprop1";

        Properties executionProperties = new Properties();

        if (executionProperties.getProperty(sysprop) == null) {
            executionProperties.setProperty(sysprop, "value");
        }

        ExpressionEvaluator ee = createExpressionEvaluator(null, executionProperties);

        Object value = ee.evaluate("${" + sysprop + "}");

        String type = artifact.getProperty(ArtifactProperties.TYPE, artifact.getExtension());
        return new DefaultArtifactHandler(
                type,
                artifact.getExtension(),
                null,
                null,
                null,
                Boolean.parseBoolean(artifact.getProperty(MavenArtifactProperties.INCLUDES_DEPENDENCIES, "")),

            activation.activeByDefault(modelActivation.isActiveByDefault());

            activation.jdk(modelActivation.getJdk());

            org.apache.maven.api.model.ActivationProperty modelProp = modelActivation.getProperty();

            if (modelProp != null) {
                ActivationProperty prop = ActivationProperty.newBuilder()
                        .name(modelProp.getName())
                        .value(modelProp.getValue())

                    props.load(Channels.newInputStream(channel));
                }

                props.setProperty(key, Long.toString(System.currentTimeMillis()));

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

            activation.activeByDefault(modelActivation.isActiveByDefault());

            activation.jdk(modelActivation.getJdk());

            org.apache.maven.api.model.ActivationProperty modelProp = modelActivation.getProperty();

            if (modelProp != null) {
                ActivationProperty prop = ActivationProperty.newBuilder()
                        .name(modelProp.getName())
                        .value(modelProp.getValue())