deny Change to accept arrays of strings

Author: sokil

src/Change.php

@@ -4,39 +4,36 @@
 
 class Change
 {
+    /**
+     * @var mixed
+     */
     private $oldValue;
 
+    /**
+     * @var mixed
+     */
     private $newValue;
 
     /**
-     * @param array|string $oldValue
-     * @param array|string $newValue
+     * @param mixed $oldValue
+     * @param mixed $newValue
      */
     public function __construct($oldValue, $newValue)
     {
-        // old value
-        if (!is_array($oldValue)) {
-            $oldValue = (string)$oldValue;
-        }
         $this->oldValue = $oldValue;
-
-        // new value
-        if (!is_array($newValue)) {
-            $newValue = (string)$newValue;
-        }
         $this->newValue = $newValue;
     }
 
     /**
-     * @return array|string
+     * @return mixed
      */
     public function getOldValue()
     {
         return $this->oldValue;
     }
 
     /**
-     * @return array|string
+     * @return mixed
      */
     public function getNewValue()
     {

src/Renderer.php

@@ -107,7 +107,10 @@ public function setFormat($format)
     public function render(Change $change)
     {
         // get diff
-        $diff = $this->differ->diffToArray($change->getOldValue(), $change->getNewValue());
+        $diff = $this->differ->diffToArray(
+            (string)$change->getOldValue(),
+            (string)$change->getNewValue()
+        );
 
         // render diff
         foreach ($diff as &$line) {

tests/RendererTest.php

@@ -80,7 +80,7 @@ public function renderChangeDataProvider()
      * @param $newValue
      * @param array|null $renderOptions
      */
-    public function testRender_ChanageValueStringType(
+    public function testRender_ChangeValueHasStringType(
         $expectedDiff,
         $oldValue,
         $newValue,