silverstripe-framework/tests/forms/DropdownFieldTest.php

<?php
/**
 * @package framework
 * @subpackage tests
 */
class DropdownFieldTest extends SapphireTest {

	public function testGetSource() {
		$source = array(1=>'one', 2 => 'two');
		$field = new DropdownField('Field', null, $source);
		$this->assertEquals(
			$source,
			$field->getSource()
		);
		$this->assertEquals(
			$source,
			$field->getSourceAsArray()
		);

		$items = new ArrayList(array(
			array( 'ID' => 1, 'Title' => 'ichi', 'OtherField' => 'notone' ),
			array( 'ID' => 2, 'Title' => 'ni', 'OtherField' => 'nottwo' ),
		));
		$field->setSource($items);
		$this->assertEquals(
			$field->getSourceAsArray(),
			array(
				1 => 'ichi',
				2 => 'ni',
			)
		);

		$map = new SS_Map($items, 'ID', 'OtherField');
		$field->setSource($map);
		$this->assertEquals(
			$field->getSourceAsArray(),
			array(
				1 => 'notone',
				2 => 'nottwo',
			)
		);
	}

	public function testReadonlyField() {
		$field = new DropdownField('FeelingOk', 'Are you feeling ok?', array(0 => 'No', 1 => 'Yes'));
		$field->setEmptyString('(Select one)');
		$field->setValue(1);
		$readonlyField = $field->performReadonlyTransformation();
		preg_match('/Yes/', $field->Field(), $matches);
		$this->assertEquals($matches[0], 'Yes');
	}

	public function testHasEmptyDefault() {
		$source = array(1 => 'one');

		// Test getSource with empty
		$field = new DropdownField('Field', null, $source);
		$field->setHasEmptyDefault(true);

		$this->assertEquals(
			$field->getSource(),
			array(
				1 => 'one'
			)
		);

		// Test that an empty option comes through in the markup however
		$options = $this->findOptionElements($field->Field());

		$this->assertEquals(
			2,
			count($options),
			'Two options exist in the markup, one for the source, one for empty'
		);

		// the default value should be first
		$first = array_shift($options);
		$attrs = $first->attributes();

		$this->assertNotEquals(
			1,
			$attrs['value'],
			'First value is the not value (not the source value)'
		);

		// Test Field Without Empty
		$FieldWithoutEmpty = new DropdownField('Field', null, $source);
		$this->assertEquals(
			$FieldWithoutEmpty->getSource(),
			array(
				1 => 'one'
			)
		);

		$this->assertEquals(
			1,
			count($options),
			'As hasEmptyDefault is not provided, then no default option.'
		);
	}

	public function testZeroArraySourceNotOverwrittenByEmptyString() {
		$source = array(0=>'zero');
		$field = new DropdownField('Field', null, $source);
		$field->setEmptyString('select...');
		$this->assertEquals(
			$field->getSource(),
			array(
				0 => 'zero'
			)
		);

		$options = $this->findOptionElements($field->Field());

		$this->assertEquals(
			2,
			count($options),
			'Two options exist in the markup, one for the source, one for empty'
		);
	}

	public function testStringZeroValueSelectedOptionBehaviour() {
		$field = new DropdownField('Field', null, array(
			'-1' => 'some negative',
			'0' => 'none',
			'1' => 'one',
			'2+' => 'two or more'
		), '0');

		$selectedOptions = $this->findSelectedOptionElements($field->Field());
		$this->assertEquals((string) $selectedOptions[0], 'none', 'The selected option is "none"');

		$field = new DropdownField('Field', null, array(
			'-1' => 'some negative',
			'0' => 'none',
			'1' => 'one',
			'2+' => 'two or more'
		), 0);

		$selectedOptions = $this->findSelectedOptionElements($field->Field());
		$this->assertEquals((string) $selectedOptions[0], 'none', 'The selected option is "none"');
	}

	public function testStringOneValueSelectedOptionBehaviour() {
		$field = new DropdownField('Field', null, array(
			'-1' => 'some negative',
			'0' => 'none',
			'1' => 'one',
			'2+' => 'two or more'
		), '1');


		$selectedOptions = $this->findSelectedOptionElements($field->Field());
		$this->assertEquals((string) $selectedOptions[0], 'one', 'The selected option is "one"');

		$field = new DropdownField('Field', null, array(
			'-1' => 'some negative',
			'0' => 'none',
			'1' => 'one',
			'2+' => 'two or more'
		), 1);

		$selectedOptions = $this->findSelectedOptionElements($field->Field());
		$this->assertEquals((string) $selectedOptions[0], 'one', 'The selected option is "one"');
	}

	public function testNumberOfSelectOptionsAvailable() {
		/* Create a field with a blank value */
		$field = $this->createDropdownField('(Any)');

		/* 3 options are available */
		$this->assertEquals(count($this->findOptionElements($field->Field())), 3, '3 options are available');
		$selectedOptions = $this->findSelectedOptionElements($field->Field());
		$this->assertEquals(count($selectedOptions), 1,
			'We only have 1 selected option, since a dropdown can only possibly have one!');

		/* Create a field without a blank value */
		$field = $this->createDropdownField();

		/* 2 options are available */
		$this->assertEquals(count($this->findOptionElements($field->Field())), 2, '2 options are available');
		$selectedOptions = $this->findSelectedOptionElements($field->Field());
		$this->assertEquals(count($selectedOptions), 0, 'There are no selected options');
	}

	public function testIntegerZeroValueSeelctedOptionBehaviour() {
		$field = $this->createDropdownField('(Any)', 0);
		$selectedOptions = $this->findSelectedOptionElements($field->Field());
		$this->assertEquals((string) $selectedOptions[0], 'No', 'The selected option is "No"');
	}

	public function testBlankStringValueSelectedOptionBehaviour() {
		$field = $this->createDropdownField('(Any)');
		$selectedOptions = $this->findSelectedOptionElements($field->Field());
		$this->assertEquals((string) $selectedOptions[0], '(Any)', 'The selected option is "(Any)"');
	}

	public function testNullValueSelectedOptionBehaviour() {
		$field = $this->createDropdownField('(Any)', null);
		$selectedOptions = $this->findSelectedOptionElements($field->Field());
		$this->assertEquals((string) $selectedOptions[0], '(Any)', 'The selected option is "(Any)"');
	}

	public function testStringValueSelectedOptionBehaviour() {
		$field = $this->createDropdownField('(Any)', '1');
		$selectedOptions = $this->findSelectedOptionElements($field->Field());
		$this->assertEquals((string) $selectedOptions[0], 'Yes', 'The selected option is "Yes"');
		$field->setSource(array(
			'Cats' => 'Cats and Kittens',
			'Dogs' => 'Dogs and Puppies'
		));
		$field->setValue('Cats');
		$selectedOptions = $this->findSelectedOptionElements($field->Field());
		$this->assertEquals((string) $selectedOptions[0], 'Cats and Kittens',
			'The selected option is "Cats and Kittens"');
	}

	public function testNumberOfDisabledOptions() {
		/* Create a field with a blank value & set 0 & 1 to disabled */
		$field = $this->createDropdownField('(Any)');
		$field->setDisabledItems(array(0,1));

		/* 3 options are available */
		$this->assertEquals(count($this->findOptionElements($field->Field())), 3, '3 options are available');

		/* There are 2 disabled options */
		$disabledOptions = $this->findDisabledOptionElements($field->Field());
		$this->assertEquals(count($disabledOptions), 2, 'We have 2 disabled options');

		/* Create a field without a blank value & set 1 to disabled, then set none to disabled (unset) */
		$field = $this->createDropdownField();
		$field->setDisabledItems(array(1));

		/* 2 options are available */
		$this->assertEquals(count($this->findOptionElements($field->Field())), 2, '2 options are available');

		/* get disabled items returns an array of one */
		$this->assertEquals(
			$field->getDisabledItems(),
			array( 1 )
		);

		/* unset disabled items */
		$field->setDisabledItems(array());

		/* There are no disabled options anymore */
		$disabledOptions = $this->findDisabledOptionElements($field->Field());
		$this->assertEquals(count($disabledOptions), 0, 'There are no disabled options');
	}

	/**
	 * The Field() method should be able to handle arrays as values in an edge case. If it couldn't handle it then
	 * this test would trigger an array to string conversion PHP notice
	 *
	 * @dataProvider arrayValueProvider
	 */
	public function testDropdownWithArrayValues($value) {
		$field = $this->createDropdownField();
		$field->setValue($value);
		$this->assertInstanceOf('HTMLText', $field->Field());
        $this->assertSame($value, $field->Value());
	}

	/**
	 * @return array
	 */
	public function arrayValueProvider() {
		return array(
			array(array()),
			array(array(0)),
			array(array(123)),
			array(array('string')),
			array('Regression-ish test.')
		);
	}

	/**
	 * Create a test dropdown field, with the option to
	 * set what source and blank value it should contain
	 * as optional parameters.
	 *
	 * @param string|null $emptyString The text to display for the empty value
	 * @param string|integer $value The default value of the field
	 * @return DropdownField object
	 */
	public function createDropdownField($emptyString = null, $value = '') {
		/* Set up source, with 0 and 1 integers as the values */
		$source = array(
			0 => 'No',
			1 => 'Yes'
		);

		$field = new DropdownField('Field', null, $source, $value);

		if($emptyString !== null) {
			$field->setEmptyString($emptyString);
		}

		return $field;
	}

	/**
	 * Find all the <OPTION> elements from a
	 * string of HTML.
	 *
	 * @param string $html HTML to scan for elements
	 * @return SimpleXMLElement
	 */
	public function findOptionElements($html) {
		$parser = new CSSContentParser($html);
		return $parser->getBySelector('option');
	}

	/**
	 * Find all the <OPTION> elements from a
	 * string of HTML that have the "selected"
	 * attribute.
	 *
	 * @param string $html HTML to parse for elements
	 * @return array of SimpleXMLElement objects
	 */
	public function findSelectedOptionElements($html) {
		$options = $this->findOptionElements($html);

		/* Find any elements that have the "selected" attribute and put them into a list */
		$foundSelected = array();
		foreach($options as $option) {
			$attributes = $option->attributes();
			if($attributes) foreach($attributes as $attribute => $value) {
				if($attribute == 'selected') {
					$foundSelected[] = $option;
				}
			}
		}

		return $foundSelected;
	}

	/**
	 * Find all the <OPTION> elements from a
	 * string of HTML that have the "disabled"
	 * attribute.
	 *
	 * @param string $html HTML to parse for elements
	 * @return array of SimpleXMLElement objects
	 */
	public function findDisabledOptionElements($html) {
		$options = $this->findOptionElements($html);

		/* Find any elements that have the "disabled" attribute and put them into a list */
		$foundDisabled = array();
		foreach($options as $option) {
			$attributes = $option->attributes();
			if($attributes) foreach($attributes as $attribute => $value) {
				if($attribute == 'disabled') {
					$foundDisabled[] = $option;
				}
			}
		}

		return $foundDisabled;
	}

	public function testValidation() {
		$field = DropdownField::create('Test', 'Testing', array(
			"One" => "One",
			"Two" => "Two",
			"Five" => "Five"
		));
		$validator = new RequiredFields();
		$form = new Form($this, 'Form', new FieldList($field), new FieldList(), $validator);
		$field->setValue("One");
		$this->assertTrue($field->validate($validator));
		$field->setName("TestNew"); //try changing name of field
		$this->assertTrue($field->validate($validator));
		//non-existent value should make the field invalid
		$field->setValue("Three");
		$this->assertFalse($field->validate($validator));
		//empty string shouldn't validate
		$field->setValue('');
		$this->assertFalse($field->validate($validator));
		//empty field should validate after being set
		$field->setEmptyString('Empty String');
		$field->setValue('');
		$this->assertTrue($field->validate($validator));
		//disabled items shouldn't validate
		$field->setDisabledItems(array('Five'));
		$field->setValue('Five');
		$this->assertFalse($field->validate($validator));
	}

}