UPDATE Method.php, MethodTest.php

- try to make the if-condition php 7.2.0-compatible
- correct docBlock for the test method

src/DocBlock/Tags/Method.php

@@ -128,7 +128,7 @@ final class Method extends BaseTag implements Factory\StaticMethod
         $returnType  = $typeResolver->resolve($returnType, $context);
         $description = $descriptionFactory->create($description, $context);
 
-        if ('' !== $arguments) {
+        if (is_string($arguments) && strlen($arguments) > 0) {
             $arguments = explode(',', $arguments);
             foreach($arguments as &$argument) {
                 $argument = explode(' ', self::stripRestArg(trim($argument)), 2);

tests/unit/DocBlock/Tags/MethodTest.php

@@ -277,6 +277,13 @@ class MethodTest extends \PHPUnit_Framework_TestCase
         $this->assertSame($description, $fixture->getDescription());
     }
 
+    /**
+     * @covers ::create
+     * @uses \phpDocumentor\Reflection\DocBlock\Tags\Method::<public>
+     * @uses \phpDocumentor\Reflection\TypeResolver
+     * @uses \phpDocumentor\Reflection\DocBlock\Description
+     * @uses \phpDocumentor\Reflection\Types\Context
+     */
     public function testReturnTypeThis()
     {
         $descriptionFactory = m::mock(DescriptionFactory::class);