<?php
require_once dirname(dirname(__FILE__)).'/src/CaptchaGenerator.php';

class CaptchaGeneratorTest
extends PHPUnit_Framework_TestCase
{
    protected $_captcha;

    protected $_phraselength = 5;

    /**
     * Prepares the environment before running a test.
     */
    protected function setUp ()
    {
        parent::setUp();

        $this->_captcha = new CaptchaGenerator(
             dirname(dirname(__FILE__)).'/tests/_drafts/arial.ttf',
             dirname(dirname(__FILE__)).'/tests/_drafts/pwdimage.png',
             $this->_phraselength
        );
    }

    /**
     * Cleans up the environment after running a test.
     */
    protected function tearDown ()
    {
        unset($this->_captcha);
        parent::tearDown();
    }

    public function testCreateNewCaptchageneratorObjectNoException()
    {
        $this->assertInstanceOf('CaptchaGenerator', $this->_captcha);
    }

    /**
     * @depends CaptchaGeneratorTest::testCreateNewCaptchageneratorObjectNoException
     * @expectedException InvalidArgumentException
     */
    public function testInvalidArgumentExceptionIfSetFont()
    {
        $this->_captcha->setFont('some/bad/font.ttf');
    }

    /**
     * @depends CaptchaGeneratorTest::testCreateNewCaptchageneratorObjectNoException
     * @expectedException InvalidArgumentException
     */
    public function testInvalidArgumentExceptionIfSetImage()
    {
        $this->_captcha->setImage('some/bad/image.png');
    }

    public function isIntDataProvider()
    {
        return array(
            array(1.1),
            array('1.1'),
            array(true),
            array(array()),
            array(new stdClass()),
            array(' '),
            array(null),
        );
    }

    /**
     * @depends CaptchaGeneratorTest::testCreateNewCaptchageneratorObjectNoException
     * @expectedException InvalidArgumentException
     * @provider isIntDataProvider
     */
    public function testInvalidArgumentExceptionIfSetFontsize($testData)
    {
        $this->_captcha->setFontsize($testData);
    }

    public function testSetFontsize()
    {
        $this->assertInstanceOf(
            'CaptchaGenerator',
            $this->_captcha->setFontsize(123)
        );
    }

    /**
     * @depends CaptchaGeneratorTest::testCreateNewCaptchageneratorObjectNoException
     * @expectedException InvalidArgumentException
     * @provider isIntDataProvider
     */
    public function testInvalidArgumentExceptionIfSetFontxmargin($testData)
    {
        $this->_captcha->setFontxmargin($testData);
    }

    public function testSetFontxmargin()
    {
        $this->assertInstanceOf(
            'CaptchaGenerator',
            $this->_captcha->setFontxmargin(13)
        );
    }

    /**
     * @depends CaptchaGeneratorTest::testCreateNewCaptchageneratorObjectNoException
     * @expectedException InvalidArgumentException
     * @provider isIntDataProvider
     */
    public function testInvalidArgumentExceptionIfSetFontymargin($testData)
    {
        $this->_captcha->setFontymargin($testData);
    }

    public function testSetFontymargin()
    {
        $this->assertInstanceOf(
            'CaptchaGenerator',
            $this->_captcha->setFontymargin(31)
        );
    }

    public function testSetFontcolor()
    {
        $this->assertInstanceOf(
            'CaptchaGenerator',
            $this->_captcha->setFontcolor(CaptchaGenerator::FONT_COLOR_BLUE)
        );
    }

    /**
     * @depends CaptchaGeneratorTest::testCreateNewCaptchageneratorObjectNoException
     * @expectedException InvalidArgumentException
     * @provider isIntDataProvider
     */
    public function testInvalidArgumentExceptionIfSetPhraselength($testData)
    {
        $this->_captcha->setPhraselength($testData);
    }

    /**
     * @expectedException InvalidArgumentException
     */
    public function testInvalidArgumentExceptionIfSetFontymarginBiggerThanFour()
    {
        $this->_captcha->setPhraselength(3);
    }

    public function testSetPhraselength()
    {
        $this->assertInstanceOf(
            'CaptchaGenerator',
            $this->_captcha->setPhraselength(4)
        );
    }

    public function testGetPhraseHaseExpectedLength()
    {
        $this->assertEquals(
            $this->_phraselength,
            mb_strlen($this->_captcha->getPhrase())
        );
    }

    /**
     * @outputBuffering enabled
     */
    public function testRenderedImageIsSamePngImage()
    {
        $expectedImage = dirname(dirname(__FILE__)).'/tests/_drafts/captcha-g5ae.png';

        ob_start();

        $this->_captcha->setPhrase('g5ae')->render();

        $actualImage = ob_get_clean();

        $this->assertSame(
            md5(file_get_contents($expectedImage)),
            md5($actualImage)
        );
    }
}