<? php
/**
 * PHPCompatibility, an external standard for PHP_CodeSniffer. 
 *
 * @package   PHPCompatibility
 * @copyright 2012-2020 PHPCompatibility Contributors
 * @license   https://opensource.org/licenses/LGPL-3.0 LGPL3
 * @link      https://github.com/PHPCompatibility/PHPCompatibility
 */

namespace PHPCompatibility\Tests\Constants;

use PHPCompatibility\Tests\BaseSniffTest;

/**
 * Test the NewMagicClassConstant sniff. 
 *
 * @group newMagicClassConstant
 * @group constants
 *
 * @covers \PHPCompatibility\Sniffs\Constants\NewMagicClassConstantSniff
 *
 * @since 7.1.4
 */
class NewMagicClassConstantUnitTest extends BaseSniffTest
{

    /**
     * Test correctly identifying the magic class constant. 
     *
     * @dataProvider dataNewMagicClassConstant
     *
     * @param int $line The line number. 
     *
     * @return void
     */
    public function testNewMagicClassConstant($line)
    {
        $file = $this->sniffFile(__FILE__, '5.4');
        $this->assertError($file, $line, 'The magic class constant ClassName::class was not available in PHP 5.4 or earlier');

        $file = $this->sniffFile(__FILE__, '5.5');
        $this->assertNoViolation($file, $line);
    }

    /**
     * Data provider. 
     *
     * @see testNewMagicClassConstant()
     *
     * @return array
     */
    public function dataNewMagicClassConstant()
    {
        return [
            [6],
            [12],
            [27],
            [28],
            [29],
            [30],
            [31],
            [32],
        ];
    }


    /**
     * Verify that no false positives are thrown for valid code. 
     *
     * @dataProvider dataNoFalsePositives
     *
     * @param int $line The line number. 
     *
     * @return void
     */
    public function testNoFalsePositives($line)
    {
        $file = $this->sniffFile(__FILE__, '5.4');
        $this->assertNoViolation($file, $line);
    }

    /**
     * Data provider. 
     *
     * @see testNoFalsePositives()
     *
     * @return array
     */
    public function dataNoFalsePositives()
    {
        return [
            [4],
            [10],
            [18],
            [19],
        ];
    }


    /**
     * Test correctly identifying the magic class constant when used on instantiated objects. 
     *
     * @dataProvider dataNewMagicClassConstantOnObject
     *
     * @param int $line The line number. 
     *
     * @return void
     */
    public function testNewMagicClassConstantOnObject($line)
    {
        $file = $this->sniffFile(__FILE__, '7.4');
        $this->assertError($file, $line, 'Using the magic class constant ::class with dynamic class names is not supported in PHP 7.4 or earlier');
    }

    /**
     * Data provider. 
     *
     * @see testNewMagicClassConstantOnObject()
     *
     * @return array
     */
    public function dataNewMagicClassConstantOnObject()
    {
        return [
            [35],
            [36],
            [37],
            [38],
            [39],

            // Still not supported, but throwing an error anyhow. 
            [49],
            [50],
            [51],
            [52],
        ];
    }


    /**
     * Verify no notices are thrown at all. 
     *
     * @return void
     */
    public function testNoViolationsInFileOnValidVersion()
    {
        $file = $this->sniffFile(__FILE__, '8.0');
        $this->assertNoViolation($file);
    }
}
