Merge pull request #7 from swaggest/issue-6

Issue 6

Author: vearutop

.gitignore

@@ -3,4 +3,5 @@
 /json-diff
 /json-diff.tar.gz
 /composer.lock
-/composer.phar
+/composer.phar
+/clover.xml

src/JsonDiff.php

@@ -231,6 +231,8 @@ private function process($original, $new)
         $newOrdered = array();
 
         $originalKeys = $original instanceof \stdClass ? get_object_vars($original) : $original;
+        $isArray = is_array($original);
+        $removedOffset = 0;
 
         foreach ($originalKeys as $key => $originalValue) {
             if ($this->options & self::STOP_ON_DIFF) {
@@ -241,8 +243,12 @@ private function process($original, $new)
 
             $path = $this->path;
             $pathItems = $this->pathItems;
-            $this->path .= '/' . JsonPointer::escapeSegment($key, $this->options & self::JSON_URI_FRAGMENT_ID);
-            $this->pathItems[] = $key;
+            $actualKey = $key;
+            if ($isArray) {
+                $actualKey -= $removedOffset;
+            }
+            $this->path .= '/' . JsonPointer::escapeSegment($actualKey, $this->options & self::JSON_URI_FRAGMENT_ID);
+            $this->pathItems[] = $actualKey;
 
             if (array_key_exists($key, $newArray)) {
                 $newOrdered[$key] = $this->process($originalValue, $newArray[$key]);
@@ -253,6 +259,9 @@ private function process($original, $new)
                     return null;
                 }
                 $this->removedPaths [] = $this->path;
+                if ($isArray) {
+                    $removedOffset++;
+                }
 
                 $this->jsonPatch->op(new Remove($this->path));
 

src/JsonPointer.php

@@ -202,7 +202,9 @@ public static function remove(&$holder, $pathItems)
                 unset($parent->$refKey);
             } else {
                 unset($parent[$refKey]);
-                $parent = array_values($parent);
+                if ($refKey !== count($parent)) {
+                    $parent = array_values($parent);
+                }
             }
         }
         return $ref;

tests/src/Issues/Issue6Test.php

@@ -0,0 +1,90 @@
+<?php
+
+namespace Swaggest\JsonDiff\Tests\Issues;
+
+use Swaggest\JsonDiff\JsonDiff;
+use Swaggest\JsonDiff\JsonPatch;
+
+
+/**
+ * @see https://github.com/swaggest/json-diff/issues/6
+ */
+class Issue6Test extends \PHPUnit_Framework_TestCase
+{
+    public function testDefault()
+    {
+        $json1 = json_decode('[{"name":"a"},{"name":"b"},{"name":"c"}]');
+        $json2 = json_decode('[{"name":"b"}]');
+
+        $diff = new JsonDiff($json1, $json2);
+        $patch = $diff->getPatch();
+
+        $this->assertSame(<<<'JSON'
+[
+    {
+        "value": "a",
+        "op": "test",
+        "path": "/0/name"
+    },
+    {
+        "value": "b",
+        "op": "replace",
+        "path": "/0/name"
+    },
+    {
+        "op": "remove",
+        "path": "/1"
+    },
+    {
+        "op": "remove",
+        "path": "/1"
+    }
+]
+JSON
+            , json_encode($patch, JSON_PRETTY_PRINT + JSON_UNESCAPED_SLASHES));
+
+        $json1a = $json1;
+        $patch->apply($json1a);
+
+        $this->assertEquals($json2, $json1a);
+    }
+
+    public function testOriginal()
+    {
+        $originalJson = '[{"name":"a"},{"name":"b"},{"name":"c"}]';
+        $newJson = '[{"name":"b"}]';
+        $diff = new JsonDiff(json_decode($originalJson), json_decode($newJson));
+
+        $patchJson = json_decode(json_encode($diff->getPatch()->jsonSerialize()), true);
+
+        $original = json_decode($originalJson);
+        $patch = JsonPatch::import($patchJson);
+        $patch->apply($original);
+        $this->assertEquals($original, json_decode($newJson));
+    }
+
+
+    public function testDoubleInverseRemove()
+    {
+        $json1 = json_decode('[{"name":"a"},{"name":"b"},{"name":"c"}]');
+        $json2 = json_decode('[{"name":"b"}]');
+
+        $patch = JsonPatch::import(json_decode('[{"op":"remove","path":"/2"},{"op":"remove","path":"/0"}]'));
+
+        $json1a = $json1;
+        $patch->apply($json1a);
+        $this->assertEquals(json_encode($json2), json_encode($json1a));
+    }
+
+    public function testDoubleRemove()
+    {
+        $json1 = json_decode('[{"name":"a"},{"name":"b"},{"name":"c"}]');
+        $json2 = json_decode('[{"name":"b"}]');
+
+        $patch = JsonPatch::import(json_decode('[{"op":"remove","path":"/0"},{"op":"remove","path":"/1"}]'));
+
+        $json1a = $json1;
+        $patch->apply($json1a);
+        $this->assertEquals(json_encode($json2), json_encode($json1a));
+    }
+}