Bean bean = newInstance(Bean.class);

        call("{ it.metaClass.getConventionProperty = { -> 'value'} }", bean);
        assertThat(call("{ it.hasProperty('conventionProperty') }", bean), notNullValue());
        assertThat(call("{ it.getConventionProperty() }", bean), equalTo((Object) "value"));
        assertThat(call("{ it.conventionProperty }", bean), equalTo((Object) "value"));
    }

        bean.setProperty("conventionProperty", "new value");

        assertThat(bean.getProperty("conventionProperty"), equalTo((Object) "new value"));
        assertThat(conventionBean.getConventionProperty(), equalTo((Object) "new value"));
    }

    @Test
    public void hasPropertyDefinedByParent() {
        Bean parent = new Bean();
        parent.defineProperty("parentProperty", "value");

                "ext.property = 'value'",
                "convention.plugins.test = new ConventionBean()",
                "task rootTask",
                "task testTask",
                "class ConventionBean { def getConventionProperty() { 'convention' } }"
        )
        file("child/build.gradle").writelns(
                "ext.childProperty = 'child'",
                "ext.sharedProperty = 'shared'",
                "task testTask {",