'one', 2 => 'two', 3 => 'three');
		$f = new LookupField('test', 'test', $source);
		$f->setValue(null);
		$this->assertEquals(
			'(none)', 
			$f->Field()
		);
	}
	public function testStringValueWithNumericArraySource() {
		$source = array(1 => 'one', 2 => 'two', 3 => 'three');
		$f = new LookupField('test', 'test', $source);
		$f->setValue(1);
		$this->assertEquals(
			'one', 
			$f->Field()
		);
	}
	
	public function testUnknownStringValueWithNumericArraySource() {
		$source = array(1 => 'one', 2 => 'two', 3 => 'three');
		$f = new LookupField('test', 'test', $source);
		$f->setValue('w00t');
		$f->dontEscape = true; // simulates CMSMain->compareversions()
		$this->assertEquals(
			'w00t', 
			$f->Field()
		);
	}
	public function testArrayValueWithAssociativeArraySource() {
		// Array values (= multiple selections) might be set e.g. from ListboxField
		$source = array('one' => 'one val', 'two' => 'two val', 'three' => 'three val');
		$f = new LookupField('test', 'test', $source);
		$f->setValue(array('one','two'));
		$this->assertEquals('one val, two val'
			. '', 
			$f->Field()
		);
	}
	
	public function testArrayValueWithNumericArraySource() {
		// Array values (= multiple selections) might be set e.g. from ListboxField
		$source = array(1 => 'one', 2 => 'two', 3 => 'three');
		$f = new LookupField('test', 'test', $source);
		$f->setValue(array(1,2));
		$this->assertEquals(
			'one, two', 
			$f->Field()
		);
	}
	
	public function testArrayValueWithSqlMapSource() {
		$member1 = $this->objFromFixture('Member', 'member1');
		$member2 = $this->objFromFixture('Member', 'member2');
		$member3 = $this->objFromFixture('Member', 'member3');
		$source = DataObject::get('Member');
		$f = new LookupField('test', 'test', $source->map('ID', 'FirstName'));
		$f->setValue(array($member1->ID, $member2->ID));
		$this->assertEquals(
			sprintf(
				'member1, member2'
					. '', 
				$member1->ID,
				$member2->ID
			),
			$f->Field()
		);
	}
	public function testWithMultiDimensionalSource() {
		$choices = array(
			"Non-vegetarian" => array(
				0 => 'Carnivore',
			),
			"Vegetarian" => array(
				3 => 'Carrots', 
			),
			"Other" => array(
				9 => 'Vegan'
			)
		);
		$f = new LookupField('test', 'test', $choices);
		$f->setValue(3);
		$this->assertEquals(
			'Carrots', 
			$f->Field()
		);
		$f->setValue(array(
			3, 9
		));
		$this->assertEquals(
			'Carrots, Vegan', 
			$f->Field()
		);
	}
}