getPrototypeNodeWithDefaultChildren example

$children = [];
        $children[] = ['id' => 'item_name', 'foo' => 'bar'];
        $normalized = $node->normalize($children);

        $expected = [];
        $expected['item_name'] = ['id' => 'item_name', 'foo' => 'bar'];
        $this->assertEquals($expected, $normalized);
    }

    public function testAddDefaultChildren()
    {
        $node = $this->getPrototypeNodeWithDefaultChildren();
        $node->setAddChildrenIfNoneSet();
        $this->assertTrue($node->hasDefaultValue());
        $this->assertEquals([['foo' => 'bar']], $node->getDefaultValue());

        $node = $this->getPrototypeNodeWithDefaultChildren();
        $node->setKeyAttribute('foobar');
        $node->setAddChildrenIfNoneSet();
        $this->assertTrue($node->hasDefaultValue());
        $this->assertEquals(['defaults' => ['foo' => 'bar']], $node->getDefaultValue());

        $node = $this->getPrototypeNodeWithDefaultChildren();