<?php

namespace PSX\Http\Tests;

use PHPUnit\Framework\TestCase;
use PSX\Http\Message;
use PSX\Http\Stream\StringStream;

/**
 * MessageTest
 *
 * @author  Christoph Kappestein <christoph.kappestein@gmail.com>
 * @license http://www.apache.org/licenses/LICENSE-2.0
 * @link    http://phpsx.org
 */
class MessageTest extends TestCase
{
    public function testConstructor()
    {
        $message = new Message(['foo' => 'bar'], new StringStream('foobar'));

        $this->assertEquals(['foo' => ['bar']], $message->getHeaders());
        $this->assertInstanceOf('PSX\Http\StreamInterface', $message->getBody());
        $this->assertEquals('foobar', (string) $message->getBody());

        $message = new Message(['foo' => 'bar'], 'foobar');

        $this->assertEquals(['foo' => ['bar']], $message->getHeaders());
        $this->assertInstanceOf('PSX\Http\StreamInterface', $message->getBody());
        $this->assertEquals('foobar', (string) $message->getBody());

        $message = new Message(['foo' => 'bar']);

        $this->assertEquals(['foo' => ['bar']], $message->getHeaders());
        $this->assertInstanceOf('PSX\Http\StreamInterface', $message->getBody());
        $this->assertEquals('', (string) $message->getBody());

        $message = new Message();

        $this->assertEquals([], $message->getHeaders());
        $this->assertInstanceOf('PSX\Http\StreamInterface', $message->getBody());
        $this->assertEquals('', (string) $message->getBody());
    }

    public function testGetSetHeaders()
    {
        $message = new Message();
        $message->setHeaders(array(
            'foo' => 'bar',
            'bar' => array('foo', 'bar'),
        ));

        $headers = $message->getHeaders();

        $this->assertTrue(is_array($headers['foo']));
        $this->assertEquals(array('bar'), $headers['foo']);
        $this->assertTrue(is_array($headers['bar']));
        $this->assertEquals(array('foo', 'bar'), $headers['bar']);

        foreach ($headers as $name => $value) {
            $this->assertTrue(is_array($value));
        }

        // set headers must overwrite all existing headers
        $message->setHeaders(array(
            'foo' => 'bar',
        ));

        $this->assertTrue($message->hasHeader('foo'));
        $this->assertFalse($message->hasHeader('bar'));
    }

    public function testHasHeader()
    {
        $message = new Message();
        $message->setHeaders(array(
            'foo' => 'bar',
        ));

        $this->assertTrue($message->hasHeader('foo'));
        $this->assertFalse($message->hasHeader('bar'));
        $this->assertTrue($message->hasHeader('FOO'));
        $this->assertFalse($message->hasHeader('BAR'));
    }

    public function testGetHeader()
    {
        $message = new Message();
        $message->setHeaders(array(
            'foo' => 'bar',
        ));

        $this->assertEquals('bar', $message->getHeader('foo'));
        $this->assertEquals(null, $message->getHeader('bar'));
        $this->assertEquals('bar', $message->getHeader('FOO'));
        $this->assertEquals(null, $message->getHeader('BAR'));
    }

    public function testGetHeaderLines()
    {
        $message = new Message();
        $message->setHeaders(array(
            'foo' => 'bar',
        ));

        $this->assertEquals(array('bar'), $message->getHeaderLines('foo'));
        $this->assertEquals(array(), $message->getHeaderLines('bar'));
        $this->assertEquals(array('bar'), $message->getHeaderLines('FOO'));
        $this->assertEquals(array(), $message->getHeaderLines('BAR'));
    }

    public function testSetHeader()
    {
        $message = new Message();

        $this->assertFalse($message->hasHeader('foo'));
        $this->assertFalse($message->hasHeader('FOO'));

        $message->setHeader('foo', 'bar');

        $this->assertTrue($message->hasHeader('foo'));
        $this->assertTrue($message->hasHeader('FOO'));
    }

    public function testAddHeader()
    {
        $message = new Message();
        $message->setHeaders(array(
            'foo' => 'bar',
        ));

        $this->assertEquals('bar', $message->getHeader('foo'));
        $this->assertEquals(array('bar'), $message->getHeaderLines('foo'));
        $this->assertEquals('bar', $message->getHeader('FOO'));
        $this->assertEquals(array('bar'), $message->getHeaderLines('FOO'));

        // now we add the same header again which must be added to the existing
        // header
        $message->addHeader('foo', 'foo');

        $this->assertEquals('bar, foo', $message->getHeader('foo'));
        $this->assertEquals(array('bar', 'foo'), $message->getHeaderLines('foo'));
        $this->assertEquals('bar, foo', $message->getHeader('FOO'));
        $this->assertEquals(array('bar', 'foo'), $message->getHeaderLines('FOO'));
    }

    public function testAddHeaderCaseInsensitive()
    {
        $message = new Message();
        $message->setHeaders(array(
            'foo' => 'bar',
        ));

        $this->assertEquals('bar', $message->getHeader('foo'));
        $this->assertEquals(array('bar'), $message->getHeaderLines('foo'));
        $this->assertEquals('bar', $message->getHeader('FOO'));
        $this->assertEquals(array('bar'), $message->getHeaderLines('FOO'));

        // now we add the same header again which must be added to the existing
        // header
        $message->addHeader('FOO', 'foo');

        $this->assertEquals('bar, foo', $message->getHeader('foo'));
        $this->assertEquals(array('bar', 'foo'), $message->getHeaderLines('foo'));
        $this->assertEquals('bar, foo', $message->getHeader('FOO'));
        $this->assertEquals(array('bar', 'foo'), $message->getHeaderLines('FOO'));
    }

    public function testRemoveHeader()
    {
        $message = new Message();
        $message->setHeaders(array(
            'foo' => 'bar',
        ));

        $this->assertTrue($message->hasHeader('foo'));
        $this->assertTrue($message->hasHeader('FOO'));

        $message->removeHeader('foo');

        $this->assertFalse($message->hasHeader('foo'));
        $this->assertFalse($message->hasHeader('FOO'));
    }

    public function testRemoveCaseInsensitive()
    {
        $message = new Message();
        $message->setHeaders(array(
            'foo' => 'bar',
        ));

        $this->assertTrue($message->hasHeader('foo'));
        $this->assertTrue($message->hasHeader('FOO'));

        $message->removeHeader('FOO');

        $this->assertFalse($message->hasHeader('foo'));
        $this->assertFalse($message->hasHeader('FOO'));
    }

    public function testSetBody()
    {
        $message = new Message();
        $message->setBody(new StringStream('foobar'));

        $this->assertEquals('foobar', (string) $message->getBody());
    }

    public function testSetBodyString()
    {
        $message = new Message(array(), 'foobar');

        $this->assertEquals('foobar', (string) $message->getBody());
    }

    public function testSetBodyNull()
    {
        $message = new Message(array(), null);

        $this->assertEquals('', (string) $message->getBody());
    }

    public function testSetBodyResource()
    {
        $handle = fopen('php://memory', 'r+');
        fwrite($handle, 'foobar');

        $message = new Message(array(), $handle);

        $this->assertEquals('foobar', (string) $message->getBody());
    }

    public function testInvalidBody()
    {
        $this->expectException(\InvalidArgumentException::class);

        new Message(array('foo' => 'bar'), new \stdClass());
    }
}
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