Allow to set custom comparator

src/Version.php

@@ -17,6 +17,9 @@
 
 class Version implements JsonSerializable
 {
+    /** @var ComparatorInterface */
+    private static $comparator;
+
     /** @var int */
     protected $major;
 
@@ -32,6 +35,11 @@ class Version implements JsonSerializable
     /** @var Build */
     protected $build;
 
+    public static function setComparator(?ComparatorInterface $comparator) : void
+    {
+        self::$comparator = $comparator;
+    }
+
     protected function __construct(int $major, int $minor, int $patch, PreRelease $preRelease, Build $build)
     {
         $this->validateNumber('major', $major);
@@ -292,12 +300,10 @@ public function toArray() : array
 
     protected function getComparator() : ComparatorInterface
     {
-        static $comparator = null;
-
-        if (null === $comparator) {
-            $comparator = new SemverComparator();
+        if (null === self::$comparator) {
+            self::$comparator = new SemverComparator();
         }
 
-        return $comparator;
+        return self::$comparator;
     }
 }

tests/VersionTest.php

@@ -5,6 +5,7 @@
 namespace Version\Tests;
 
 use PHPUnit\Framework\TestCase;
+use Version\Comparator\ComparatorInterface;
 use Version\Exception\InvalidVersionException;
 use Version\Exception\InvalidVersionStringException;
 use Version\Extension\Build;
@@ -221,4 +222,25 @@ public function getInvalidVersionStrings() : array
             'leadingZeroIsInvalid' => ['1.05.2'],
         ];
     }
+
+    /**
+     * @test
+     */
+    public function it_can_set_custom_comparator() : void
+    {
+        Version::setComparator(new class implements ComparatorInterface {
+            public function compare(Version $version1, Version $version2) : int
+            {
+                return 1;
+            }
+        });
+
+        try {
+            $version = Version::fromParts(1);
+            $this->assertSame(1, $version->compareTo($version));
+        } finally {
+            // reset comparator
+            Version::setComparator(null);
+        }
+    }
 }