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server/vendor/guzzlehttp/psr7/tests/CachingStreamTest.php

@@ -0,0 +1,166 @@
+<?php
+namespace GuzzleHttp\Tests\Psr7;
+
+use GuzzleHttp\Psr7;
+use GuzzleHttp\Psr7\CachingStream;
+
+/**
+ * @covers GuzzleHttp\Psr7\CachingStream
+ */
+class CachingStreamTest extends \PHPUnit_Framework_TestCase
+{
+    /** @var CachingStream */
+    protected $body;
+    protected $decorated;
+
+    public function setUp()
+    {
+        $this->decorated = Psr7\stream_for('testing');
+        $this->body = new CachingStream($this->decorated);
+    }
+
+    public function tearDown()
+    {
+        $this->decorated->close();
+        $this->body->close();
+    }
+
+    public function testUsesRemoteSizeIfPossible()
+    {
+        $body = Psr7\stream_for('test');
+        $caching = new CachingStream($body);
+        $this->assertEquals(4, $caching->getSize());
+    }
+
+    public function testReadsUntilCachedToByte()
+    {
+        $this->body->seek(5);
+        $this->assertEquals('n', $this->body->read(1));
+        $this->body->seek(0);
+        $this->assertEquals('t', $this->body->read(1));
+    }
+
+    public function testCanSeekNearEndWithSeekEnd()
+    {
+        $baseStream = Psr7\stream_for(implode('', range('a', 'z')));
+        $cached = new CachingStream($baseStream);
+        $cached->seek(-1, SEEK_END);
+        $this->assertEquals(25, $baseStream->tell());
+        $this->assertEquals('z', $cached->read(1));
+        $this->assertEquals(26, $cached->getSize());
+    }
+
+    public function testCanSeekToEndWithSeekEnd()
+    {
+        $baseStream = Psr7\stream_for(implode('', range('a', 'z')));
+        $cached = new CachingStream($baseStream);
+        $cached->seek(0, SEEK_END);
+        $this->assertEquals(26, $baseStream->tell());
+        $this->assertEquals('', $cached->read(1));
+        $this->assertEquals(26, $cached->getSize());
+    }
+
+    public function testCanUseSeekEndWithUnknownSize()
+    {
+        $baseStream = Psr7\stream_for('testing');
+        $decorated = Psr7\FnStream::decorate($baseStream, [
+            'getSize' => function () { return null; }
+        ]);
+        $cached = new CachingStream($decorated);
+        $cached->seek(-1, SEEK_END);
+        $this->assertEquals('g', $cached->read(1));
+    }
+
+    public function testRewindUsesSeek()
+    {
+        $a = Psr7\stream_for('foo');
+        $d = $this->getMockBuilder('GuzzleHttp\Psr7\CachingStream')
+            ->setMethods(array('seek'))
+            ->setConstructorArgs(array($a))
+            ->getMock();
+        $d->expects($this->once())
+            ->method('seek')
+            ->with(0)
+            ->will($this->returnValue(true));
+        $d->seek(0);
+    }
+
+    public function testCanSeekToReadBytes()
+    {
+        $this->assertEquals('te', $this->body->read(2));
+        $this->body->seek(0);
+        $this->assertEquals('test', $this->body->read(4));
+        $this->assertEquals(4, $this->body->tell());
+        $this->body->seek(2);
+        $this->assertEquals(2, $this->body->tell());
+        $this->body->seek(2, SEEK_CUR);
+        $this->assertEquals(4, $this->body->tell());
+        $this->assertEquals('ing', $this->body->read(3));
+    }
+
+    public function testWritesToBufferStream()
+    {
+        $this->body->read(2);
+        $this->body->write('hi');
+        $this->body->seek(0);
+        $this->assertEquals('tehiing', (string) $this->body);
+    }
+
+    public function testSkipsOverwrittenBytes()
+    {
+        $decorated = Psr7\stream_for(
+            implode("\n", array_map(function ($n) {
+                return str_pad($n, 4, '0', STR_PAD_LEFT);
+            }, range(0, 25)))
+        );
+
+        $body = new CachingStream($decorated);
+
+        $this->assertEquals("0000\n", Psr7\readline($body));
+        $this->assertEquals("0001\n", Psr7\readline($body));
+        // Write over part of the body yet to be read, so skip some bytes
+        $this->assertEquals(5, $body->write("TEST\n"));
+        $this->assertEquals(5, $this->readAttribute($body, 'skipReadBytes'));
+        // Read, which skips bytes, then reads
+        $this->assertEquals("0003\n", Psr7\readline($body));
+        $this->assertEquals(0, $this->readAttribute($body, 'skipReadBytes'));
+        $this->assertEquals("0004\n", Psr7\readline($body));
+        $this->assertEquals("0005\n", Psr7\readline($body));
+
+        // Overwrite part of the cached body (so don't skip any bytes)
+        $body->seek(5);
+        $this->assertEquals(5, $body->write("ABCD\n"));
+        $this->assertEquals(0, $this->readAttribute($body, 'skipReadBytes'));
+        $this->assertEquals("TEST\n", Psr7\readline($body));
+        $this->assertEquals("0003\n", Psr7\readline($body));
+        $this->assertEquals("0004\n", Psr7\readline($body));
+        $this->assertEquals("0005\n", Psr7\readline($body));
+        $this->assertEquals("0006\n", Psr7\readline($body));
+        $this->assertEquals(5, $body->write("1234\n"));
+        $this->assertEquals(5, $this->readAttribute($body, 'skipReadBytes'));
+
+        // Seek to 0 and ensure the overwritten bit is replaced
+        $body->seek(0);
+        $this->assertEquals("0000\nABCD\nTEST\n0003\n0004\n0005\n0006\n1234\n0008\n0009\n", $body->read(50));
+
+        // Ensure that casting it to a string does not include the bit that was overwritten
+        $this->assertContains("0000\nABCD\nTEST\n0003\n0004\n0005\n0006\n1234\n0008\n0009\n", (string) $body);
+    }
+
+    public function testClosesBothStreams()
+    {
+        $s = fopen('php://temp', 'r');
+        $a = Psr7\stream_for($s);
+        $d = new CachingStream($a);
+        $d->close();
+        $this->assertFalse(is_resource($s));
+    }
+
+    /**
+     * @expectedException \InvalidArgumentException
+     */
+    public function testEnsuresValidWhence()
+    {
+        $this->body->seek(10, -123456);
+    }
+}