Upgrade PHPUnit to v8

tests/Monolog/Formatter/ElasticaFormatterTest.php

@@ -15,7 +15,7 @@ use Monolog\Logger;
 
 class ElasticaFormatterTest extends \PHPUnit\Framework\TestCase
 {
-    public function setUp()
+    public function setUp(): void
     {
         if (!class_exists("Elastica\Document")) {
             $this->markTestSkipped("ruflin/elastica not installed");

tests/Monolog/Formatter/GelfMessageFormatterTest.php

@@ -12,10 +12,11 @@
 namespace Monolog\Formatter;
 
 use Monolog\Logger;
+use PHPUnit\Framework\TestCase;
 
-class GelfMessageFormatterTest extends \PHPUnit\Framework\TestCase
+class GelfMessageFormatterTest extends TestCase
 {
-    public function setUp()
+    public function setUp(): void
     {
         if (!class_exists('\Gelf\Message')) {
             $this->markTestSkipped("graylog2/gelf-php is not installed");
@@ -82,10 +83,11 @@ class GelfMessageFormatterTest extends \PHPUnit\Framework\TestCase
 
     /**
      * @covers Monolog\Formatter\GelfMessageFormatter::format
-     * @expectedException InvalidArgumentException
      */
     public function testFormatInvalidFails()
     {
+        $this->expectException(\InvalidArgumentException::class);
+
         $formatter = new GelfMessageFormatter();
         $record = [
             'level' => Logger::ERROR,

tests/Monolog/Formatter/LogstashFormatterTest.php

@@ -12,16 +12,10 @@
 namespace Monolog\Formatter;
 
 use Monolog\Logger;
+use PHPUnit\Framework\TestCase;
 
-class LogstashFormatterTest extends \PHPUnit\Framework\TestCase
+class LogstashFormatterTest extends TestCase
 {
-    public function tearDown()
-    {
-        \PHPUnit\Framework\Error\Warning::$enabled = true;
-
-        return parent::tearDown();
-    }
-
     /**
      * @covers Monolog\Formatter\LogstashFormatter::format
      */

tests/Monolog/Formatter/MongoDBFormatterTest.php

@@ -18,7 +18,7 @@ use Monolog\Logger;
  */
 class MongoDBFormatterTest extends \PHPUnit\Framework\TestCase
 {
-    public function setUp()
+    public function setUp(): void
     {
         if (!class_exists('MongoDB\BSON\UTCDateTime')) {
             $this->markTestSkipped('ext-mongodb not installed');

tests/Monolog/Formatter/NormalizerFormatterTest.php

@@ -11,18 +11,13 @@
 
 namespace Monolog\Formatter;
 
+use PHPUnit\Framework\TestCase;
+
 /**
  * @covers Monolog\Formatter\NormalizerFormatter
  */
-class NormalizerFormatterTest extends \PHPUnit\Framework\TestCase
+class NormalizerFormatterTest extends TestCase
 {
-    public function tearDown()
-    {
-        \PHPUnit\Framework\Error\Warning::$enabled = true;
-
-        return parent::tearDown();
-    }
-
     public function testFormat()
     {
         $formatter = new NormalizerFormatter('Y-m-d');
@@ -263,11 +258,10 @@ class NormalizerFormatterTest extends \PHPUnit\Framework\TestCase
         $this->assertEquals('Over 1000 items (2000 total), aborting normalization', $res['context'][0]['...']);
     }
 
-    /**
-     * @expectedException RuntimeException
-     */
     public function testThrowsOnInvalidEncoding()
     {
+        $this->expectException(\RuntimeException::class);
+
         $formatter = new NormalizerFormatter();
         $reflMethod = new \ReflectionMethod($formatter, 'toJson');
         $reflMethod->setAccessible(true);

tests/Monolog/Formatter/ScalarFormatterTest.php

@@ -17,7 +17,7 @@ class ScalarFormatterTest extends \PHPUnit\Framework\TestCase
 {
     private $formatter;
 
-    public function setUp()
+    public function setUp(): void
     {
         $this->formatter = new ScalarFormatter();
     }

tests/Monolog/Formatter/WildfireFormatterTest.php

@@ -91,10 +91,11 @@ class WildfireFormatterTest extends \PHPUnit\Framework\TestCase
 
     /**
      * @covers Monolog\Formatter\WildfireFormatter::formatBatch
-     * @expectedException BadMethodCallException
      */
     public function testBatchFormatThrowException()
     {
+        $this->expectException(\BadMethodCallException::class);
+
         $wildfire = new WildfireFormatter();
         $record = [
             'level' => Logger::ERROR,