public function testColumnAbstraction() {
		$result = $this->db->invokeMethod('_column', array('varchar'));
		$this->assertIdentical(array('type' => 'string'), $result);

		$result = $this->db->invokeMethod('_column', array('tinyint(1)'));
		$this->assertIdentical(array('type' => 'boolean'), $result);

		$result = $this->db->invokeMethod('_column', array('varchar(255)'));
		$this->assertIdentical(array('type' => 'string', 'length' => 255), $result);

		$result = $this->db->invokeMethod('_column', array('text'));
		$this->assertIdentical(array('type' => 'text'), $result);

		$result = $this->db->invokeMethod('_column', array('text'));
		$this->assertIdentical(array('type' => 'text'), $result);

		$result = $this->db->invokeMethod('_column', array('decimal(12,2)'));
		$this->assertIdentical(array('type' => 'float', 'length' => 12, 'precision' => 2), $result);

		$result = $this->db->invokeMethod('_column', array('int(11)'));
		$this->assertIdentical(array('type' => 'integer', 'length' => 11), $result);
	}