/**
* @test
* @return void
*/
public function testGetInheritedThemes()
{
$inheritedTheme = $this->getMockBuilder('Magento\\Framework\\View\\Design\\ThemeInterface')->getMock();
$this->_model->setParentId(10);
$this->themeFactory->expects($this->once())->method('create')->with(10)->willReturn($inheritedTheme);
$this->assertContainsOnlyInstancesOf('Magento\\Framework\\View\\Design\\ThemeInterface', $this->_model->getInheritedThemes());
$this->assertCount(2, $this->_model->getInheritedThemes());
}