add missing test

Author: dominikzogg

tests/Unit/ParserTest.php

@@ -6,6 +6,7 @@
 
 use Chubbyphp\Parsing\Parser;
 use Chubbyphp\Parsing\Schema\ArraySchema;
+use Chubbyphp\Parsing\Schema\AssocSchema;
 use Chubbyphp\Parsing\Schema\BackedEnumSchema;
 use Chubbyphp\Parsing\Schema\BoolSchema;
 use Chubbyphp\Parsing\Schema\DateTimeSchema;
@@ -47,6 +48,17 @@ public function testArray(): void
         self::assertInstanceOf(ArraySchema::class, $arraySchema);
     }
 
+    public function testAssoc(): void
+    {
+        $p = new Parser();
+
+        $assocSchema = $p->assoc([
+            'field' => $p->string(),
+        ]);
+
+        self::assertInstanceOf(AssocSchema::class, $assocSchema);
+    }
+
     public function testBackedEnum(): void
     {
         $p = new Parser();