Update PHPUnit, clean up test suite and add .gitattributes to exclude dev files from exports

.gitattributes

@@ -0,0 +1,6 @@
+/.gitattributes export-ignore
+/.gitignore export-ignore
+/.travis.yml export-ignore
+/examples/ export-ignore
+/phpunit.xml.dist export-ignore
+/tests/ export-ignore

composer.json

@@ -16,13 +16,16 @@
         "react/stream": "^1.0 || ^0.7 || ^0.6"
     },
     "require-dev": {
-        "phpunit/phpunit": "^5.0 || ^4.8",
+        "phpunit/phpunit": "^7.0 || ^6.0",
         "react/event-loop": "^1.0 || ^0.5 || ^0.4 || ^0.3"
     },
     "suggest": {
         "ext-zlib": "Requires ext-zlib extension"
     },
     "autoload": {
         "psr-4": { "Clue\\React\\Zlib\\": "src/" }
+    },
+    "autoload-dev": {
+        "psr-4": { "Clue\\Tests\\React\\Zlib\\": "tests/" }
     }
 }

phpunit.xml.dist

@@ -1,11 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 
-<phpunit bootstrap="tests/bootstrap.php"
-         colors="true"
-         convertErrorsToExceptions="true"
-         convertNoticesToExceptions="true"
-         convertWarningsToExceptions="true"
->
+<phpunit bootstrap="vendor/autoload.php" colors="true">
     <testsuites>
         <testsuite name="zlib React Test Suite">
             <directory>./tests/</directory>

tests/CompressorTest.php

@@ -1,5 +1,7 @@
 <?php
 
+namespace Clue\Tests\React\Zlib;
+
 use Clue\React\Zlib\Compressor;
 
 class CompressorTest extends TestCase

tests/DecompressorTest.php

@@ -1,5 +1,7 @@
 <?php
 
+namespace Clue\Tests\React\Zlib;
+
 use Clue\React\Zlib\Decompressor;
 
 class DecompressorTest extends TestCase

tests/DeflateDecompressorTest.php

@@ -1,5 +1,7 @@
 <?php
 
+namespace Clue\Tests\React\Zlib;
+
 use Clue\React\Zlib\Decompressor;
 
 class DeflateDecompressorTest extends TestCase

tests/DelateCompressorTest.php

@@ -1,5 +1,7 @@
 <?php
 
+namespace Clue\Tests\React\Zlib;
+
 use Clue\React\Zlib\Compressor;
 
 class DeflateCompressorTest extends TestCase

tests/FunctionalExamplesTest.php

@@ -1,5 +1,7 @@
 <?php
 
+namespace Clue\Tests\React\Zlib;
+
 class FunctionalExamplesTest extends TestCase
 {
     public function setUp()

tests/GzipCompressorTest.php

@@ -1,5 +1,7 @@
 <?php
 
+namespace Clue\Tests\React\Zlib;
+
 use Clue\React\Zlib\Compressor;
 
 class GzipCompressorTest extends TestCase

tests/GzipDecompressorTest.php

@@ -1,5 +1,7 @@
 <?php
 
+namespace Clue\Tests\React\Zlib;
+
 use Clue\React\Zlib\Decompressor;
 
 class GzipDecompressorTest extends TestCase

tests/bootstrap.php → tests/TestCase.php

@@ -1,8 +1,8 @@
 <?php
 
-require __DIR__ . '/../vendor/autoload.php';
+namespace Clue\Tests\React\Zlib;
 
-class TestCase extends PHPUnit_Framework_TestCase
+class TestCase extends \PHPUnit\Framework\TestCase
 {
     protected function expectCallableOnce()
     {
@@ -37,18 +37,8 @@ protected function expectCallableNever()
         return $mock;
     }
 
-    /**
-     * @link https://github.com/reactphp/react/blob/master/tests/React/Tests/Socket/TestCase.php (taken from reactphp/react)
-     */
     protected function createCallableMock()
     {
-        return $this->getMockBuilder('CallableStub')->getMock();
-    }
-}
-
-class CallableStub
-{
-    public function __invoke()
-    {
+        return $this->getMockBuilder('stdClass')->setMethods(array('__invoke'))->getMock();
     }
 }

tests/TransformStreamTest.php

@@ -1,5 +1,7 @@
 <?php
 
+namespace Clue\Tests\React\Zlib;
+
 use Clue\React\Zlib\TransformStream;
 use React\Stream\ThroughStream;
 

tests/ZlibCompressorTest.php

@@ -1,5 +1,7 @@
 <?php
 
+namespace Clue\Tests\React\Zlib;
+
 use Clue\React\Zlib\Compressor;
 
 class ZlibCompressorTest extends TestCase

tests/ZlibDecompressorTest.php

@@ -1,5 +1,7 @@
 <?php
 
+namespace Clue\Tests\React\Zlib;
+
 use Clue\React\Zlib\Decompressor;
 
 class ZlibDecompressorTest extends TestCase