/**
* Can we set and return Expressions?
*/
public function testExpressionGetSet()
{
$obj_doc = new \Search\Document();
$obj_doc->setExpression('a', 'b');
$obj_doc->setExpression('c', 'd');
$this->assertEquals('b', $obj_doc->getExpression('a'));
$this->assertNull($obj_doc->getExpression('missing'));
$this->assertEquals(['a' => 'b', 'c' => 'd'], $obj_doc->getExpressions());
}
