deep compare for complex enums, resolves #31

Author: vearutop

src/Schema.php

@@ -222,9 +222,17 @@ private function processEnum($data, $path = '#')
     {
         $enumOk = false;
         foreach ($this->enum as $item) {
-            if ($item === $data) { // todo support complex structures here
+            if ($item === $data) {
                 $enumOk = true;
                 break;
+            } else {
+                if (is_array($item) || is_object($item)) {
+                    $diff = new JsonDiff($item, $data, JsonDiff::STOP_ON_DIFF);
+                    if ($diff->getDiffCnt() === 0) {
+                        $enumOk = true;
+                        break;
+                    }
+                }
             }
         }
         if (!$enumOk) {

tests/resources/suite/enum.json

@@ -0,0 +1,68 @@
+[
+  {
+    "description": "complex enum validation",
+    "schema": {
+      "enum": [
+        6,
+        "foo",
+        [],
+        true,
+        {
+          "foo": 12
+        },
+        [{"one": 1,"two":2}]
+      ]
+    },
+    "tests": [
+      {
+        "description": "one of the enum is valid",
+        "data": [],
+        "valid": true
+      },
+      {
+        "description": "missing from enum is not valid",
+        "data": [1,2],
+        "valid": false
+      },
+      {
+        "description": "something else is invalid",
+        "data": null,
+        "valid": false
+      },
+      {
+        "description": "objects are deep compared",
+        "data": {
+          "foo": false
+        },
+        "valid": false
+      },
+      {
+        "description": "objects are deep compared 2",
+        "data": {
+          "foo": 12
+        },
+        "valid": true
+      },
+      {
+        "description": "objects are deep compared 3",
+        "data": [
+          {
+            "two": 2,
+            "one": 1
+          }
+        ],
+        "valid": true
+      },
+      {
+        "description": "objects are deep compared 4",
+        "data": [
+          {
+            "one": 1,
+            "two": 2
+          }
+        ],
+        "valid": true
+      }
+    ]
+  }
+]