Add PHPUnit 10 support (#20)

composer.json

@@ -11,7 +11,7 @@
     ],
     "require": {
         "php": "^5.5 || ^7.0 || ^8.0",
-        "phpunit/phpunit": "^4.8.36 || ^5.7.27 || ^6.5.14 || ^7.5.20 || ^8.0 || ^9.0"
+        "phpunit/phpunit": "^4.8.36 || ^5.7.27 || ^6.5.14 || ^7.5.20 || ^8.0 || ^9.0 || ^10.0"
     },
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^2",

phpunit.xml.dist

@@ -1,10 +1,14 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<phpunit bootstrap="./vendor/autoload.php">
-    <filter>
-        <whitelist>
-            <directory>src</directory>
-        </whitelist>
-    </filter>
+<phpunit xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'
+         xsi:noNamespaceSchemaLocation='./vendor/phpunit/phpunit/phpunit.xsd'
+         bootstrap="./vendor/autoload.php"
+         cacheResult="false"
+>
+    <coverage>
+        <include>
+            <directory>./src</directory>
+        </include>
+    </coverage>
     <testsuites>
         <testsuite name="Default">
             <directory>tests</directory>

src/PolyfillTrait.php

@@ -16,9 +16,13 @@ trait PolyfillTrait
     {
         use PolyfillTrait6;
     }
-} else {
+} elseif (version_compare(\PHPUnit\Runner\Version::id(), '10.0.0') < 0) {
     trait PolyfillTrait
     {
         use PolyfillTrait7;
     }
+} else {
+    trait PolyfillTrait
+    {
+    }
 }

src/aliases.php

@@ -9,18 +9,13 @@
  * with this source code in the file LICENSE.
  */
 
-if (!class_exists('PHPUnit\Framework\Error\Warning')) {
-    class_alias('PHPUnit_Framework_Error_Warning', 'PHPUnit\Framework\Error\Warning');
-}
-
-if (!class_exists('PHPUnit\Framework\ExpectationFailedException')) {
-    class_alias('PHPUnit_Framework_ExpectationFailedException', 'PHPUnit\Framework\ExpectationFailedException');
-}
-
-if (!class_exists('PHPUnit\Framework\TestCase')) {
-    class_alias('PHPUnit_Framework_TestCase', 'PHPUnit\Framework\TestCase');
-}
-
-if (!class_exists('PHPUnit\Runner\Version')) {
-    class_alias('PHPUnit_Runner_Version', 'PHPUnit\Runner\Version');
+foreach ([
+    'PHPUnit_Framework_Error_Warning' => 'PHPUnit\Framework\Error\Warning',
+    'PHPUnit_Framework_ExpectationFailedException' => 'PHPUnit\Framework\ExpectationFailedException',
+    'PHPUnit_Framework_TestCase' => 'PHPUnit\Framework\TestCase',
+    'PHPUnit_Runner_Version' => 'PHPUnit\Runner\Version',
+] as $old => $new) {
+    if (!class_exists($new) && class_exists($old)) {
+        class_alias($old, $new);
+    }
 }