Fix deprecation warnings

composer.json

@@ -5,7 +5,7 @@
     "authors": [
         {
             "name": "Chris Boulton",
-            "email": "@chrisboulton"
+            "email": "chris@chrisboulton.no-email"
         }
     ],
     "autoload": {
@@ -14,6 +14,6 @@
         }
     },
     "require-dev": {
-        "phpunit/phpunit": "~5.5"
+        "phpunit/phpunit": "~8"
     }
 }

lib/Diff/SequenceMatcher.php

@@ -75,6 +75,21 @@ class Diff_SequenceMatcher
 		'ignoreCase' => false
 	);
 
+	/**
+	 * @var array|null
+	 */
+	private $matchingBlocks;
+
+	/**
+	 * @var array|null
+	 */
+	private $opCodes;
+
+	/**
+	 * @var array|null
+	 */
+	private $fullBCount;
+
 	/**
 	 * The constructor. With the sequences being passed, they'll be set for the
 	 * sequence matcher and it will perform a basic cleanup & calculate junk
@@ -84,7 +99,7 @@ class Diff_SequenceMatcher
 	 * @param string|array $b A string or array containing the lines to compare.
 	 * @param string|array $junkCallback Either an array or string that references a callback function (if there is one) to determine 'junk' characters.
 	 */
-	public function __construct($a, $b, $junkCallback=null, $options)
+	public function __construct($a, $b, $junkCallback, $options)
 	{
 		$this->a = null;
 		$this->b = null;
@@ -349,8 +364,8 @@ public function getMatchingBlocks()
 			return $this->matchingBlocks;
 		}
 
-		$aLength = count($this->a);
-		$bLength = count($this->b);
+		$aLength = count($this->a ?? []);
+		$bLength = count($this->b ?? []);
 
 		$queue = array(
 			array(
@@ -739,4 +754,4 @@ private function tupleSort($a, $b)
 			return 1;
 		}
 	}
-}
+}

tests/Diff/Renderer/Html/ArrayTest.php

@@ -2,7 +2,9 @@
 
 namespace Tests\Diff\Renderer\Html;
 
-class ArrayTest extends \PHPUnit_Framework_TestCase
+use PHPUnit\Framework\TestCase;
+
+class ArrayTest extends TestCase
 {
     public function testRenderSimpleDelete()
     {