@Test
        void testWriteOperationBehavior() {
            // Create a Model with initial properties
            Model model = new Model();

            // Set initial properties using setProperties to establish the backend
            Properties initialProps = new Properties();
            initialProps.setProperty("initial.key", "initial.value");
            model.setProperties(initialProps);

        Object value = ee.evaluate(expr);

        assertEquals(expr, value);
    }

    @Test
    void testPOMPropertyExtractionWithMissingProjectWithDotNotation() throws Exception {
        String key = "m2.name";
        String checkValue = "value";

        Properties properties = new Properties();
        properties.setProperty(key, checkValue);

            entry.setValue(entry.getValue() + "x");
        }
        Object o21 = properties.get(KEY1);
        assertEquals(VALUE1 + "x", o21);

        baos = new ByteArrayOutputStream();
        properties.save(baos);

        properties = new MavenProperties();
        properties.load(new ByteArrayInputStream(baos.toByteArray()));
        Object o2 = properties.get(KEY1);

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

        assertEquals(checkValue, value);
    }

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

        Properties executionProperties = new Properties();

                    "WithComputedField-Input": {
                        "properties": {"name": {"type": "string", "title": "Name"}},
                        "type": "object",
                        "required": ["name"],
                        "title": "WithComputedField",
                    },
                    "WithComputedField-Output": {
                        "properties": {

        then:
        formatTree(result) == '''<chapter>
    <section>
        <title>Properties</title>
        <section>
            <title>Properties added by the <literal>thingo</literal> plugin</title>
            <titleabbrev><literal>thingo</literal> plugin</titleabbrev>
            <table>
                <title>Properties - <literal>thingo</literal> plugin</title>
                <thead>
                    <tr>

        MavenProperties properties;
        if (props instanceof MavenProperties mavenProperties) {
            properties = mavenProperties;
        } else {
            properties = new MavenProperties();
            properties.putAll(props);
        }
        return update(properties);
    }

    public boolean update(MavenProperties properties) {
        boolean modified = false;

        MavenProperties properties;
        if (props instanceof MavenProperties mavenProperties) {
            properties = mavenProperties;
        } else {
            properties = new MavenProperties();
            properties.putAll(props);
        }
        return update(properties);
    }

    public boolean update(MavenProperties properties) {
        boolean modified = false;

        assertNotNull(result.getProblems());
        assertEquals(0, result.getProblems().size());
    }

    @Test
    void testBuildRequestWithUserToolchains() throws Exception {
        Properties props = new Properties();
        props.put("key", "user_value");
        ToolchainModel toolchain = new ToolchainModel();
        toolchain.setType("TYPE");
        toolchain.setProvides(props);

        Files.createDirectories(mvn);
        Files.writeString(
                mvn.resolve("maven-user.properties"),
                "${includes} = env-${envName}.properties\nfro = ${bar}z\n" + "bar = chti${java.version}\n");
        Files.writeString(mvn.resolve("env-test.properties"), "\n");

        // Arrange
        CliRequest request = new CliRequest(
                new String[] {
                    "-DenvName=test",