given:
        property.set(notDefined())
        and:
        property.put('k1', 'v1')
        property.put('k2', Providers.of('v2'))
        property.putAll(['k3': 'v3'])
        property.putAll(Providers.of(['k4': 'v4']))

        expect:
        !property.present
        property.getOrNull() == null
        property.getOrElse(['kk': 'vv']) == ['kk': 'vv']

        when:
        property.get()
        then:

        property.get() == someValue()

        property.set(someOtherValue())
        property.present
        property.get() == someOtherValue()
    }

    def "can use null convention value"() {
        def property = propertyWithNoValue()
        assert property.getOrNull() != someValue()

        expect:
        nullConvention(property)

        !property.present
        property.getOrNull() == null

        given:
        def property = property()
        property.set(someValue())
        property.set((Iterable) null)

        expect:
        !property.present
        property.getOrNull() == null
        property.getOrElse(someValue()) == someValue()
        property.getOrElse(null) == null
    }

    def "can set null value to remove any added values"() {
        property.add("abc")

    }

    private static boolean isNameProperty(PropertyMetadata property) {
        // Property is read only, called "name", has type String and getter is abstract
        return property.isReadOnly() && "name".equals(property.getName()) && property.getType() == String.class && property.getMainGetter().isAbstract();
    }

    private static boolean hasPropertyType(PropertyMetadata property) {

Method <org.gradle.api.plugins.antlr.AntlrTask.getMaxHeapSize()> does not have raw return type assignable to org.gradle.api.provider.Property in (AntlrTask.java:0)
Method <org.gradle.api.plugins.antlr.AntlrTask.getOutputDirectory()> does not have raw return type assignable to org.gradle.api.provider.Property in (AntlrTask.java:0)

 *
 * </ul>
 *
 * <p>When reading a property, the project searches the above scopes in order, and returns the value from the first
 * scope it finds the property in. If not found, an exception is thrown. See {@link #property(String)} for more details.</p>
 *
 * <p>When writing a property, the project searches the above scopes in order, and sets the property in the first scope

        failureDescriptionContains("- Type 'Consumer' property 'counter' doesn't have a configured value.")
        failureDescriptionContains("Reason: This property isn't marked as optional and no value has been configured.")
    }

    def "injection by name does not fail validation if service is not found but property marked as @Optional"() {
        given:
        serviceImplementation()

<2> Reads the value from the project extra property we created — note the `project.` qualifier on `extra[...]`, otherwise Gradle will assume we want to read an extra property from the _task_

// === `Property`, `Provider` and `NamedDomainObjectProvider`


[[kotdsl:assignment]]
== Kotlin lazy property assignment

====
include::sample[dir="snippets/files/misc/kotlin/project2",files="build.gradle.kts[tags=using-root-dir-property]"]
include::sample[dir="snippets/files/misc/groovy/project2",files="build.gradle[tags=using-root-dir-property]"]
====

    @Test
    void testPluginConfigProperties() throws Exception {
        PomTestWrapper pom = buildPom("plugin-config-properties");
        assertEquals(
                "my.property", pom.getValue("build/plugins[1]/configuration[1]/systemProperties[1]/property[1]/name"));
    }

    /*MNG-3900*/
    @Test
    void testProfilePropertiesInterpolation() throws Exception {