feat: include actual count in collection constraint errors

CHANGELOG.md

@@ -6,6 +6,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Changed
+- Include actual count in collection constraint errors ([#797](https://github.com/jsonrainbow/json-schema/pull/797))
 
 ## [6.2.0] - 2025-02-26
 ### Added

src/JsonSchema/ConstraintError.php

@@ -88,9 +88,9 @@ public function getMessage()
             self::LENGTH_MAX => 'Must be at most %d characters long',
             self::INVALID_SCHEMA => 'Schema is not valid',
             self::LENGTH_MIN => 'Must be at least %d characters long',
-            self::MAX_ITEMS => 'There must be a maximum of %d items in the array',
+            self::MAX_ITEMS => 'There must be a maximum of %d items in the array, %d found',
             self::MAXIMUM => 'Must have a maximum value less than or equal to %d',
-            self::MIN_ITEMS => 'There must be a minimum of %d items in the array',
+            self::MIN_ITEMS => 'There must be a minimum of %d items in the array, %d found',
             self::MINIMUM => 'Must have a minimum value greater than or equal to %d',
             self::MISSING_MAXIMUM => 'Use of exclusiveMaximum requires presence of maximum',
             self::MISSING_MINIMUM => 'Use of exclusiveMinimum requires presence of minimum',

src/JsonSchema/Constraints/CollectionConstraint.php

@@ -29,12 +29,12 @@ public function check(&$value, $schema = null, ?JsonPointer $path = null, $i = n
     {
         // Verify minItems
         if (isset($schema->minItems) && count($value) < $schema->minItems) {
-            $this->addError(ConstraintError::MIN_ITEMS(), $path, ['minItems' => $schema->minItems]);
+            $this->addError(ConstraintError::MIN_ITEMS(), $path, ['minItems' => $schema->minItems, 'found' => count($value)]);
         }
 
         // Verify maxItems
         if (isset($schema->maxItems) && count($value) > $schema->maxItems) {
-            $this->addError(ConstraintError::MAX_ITEMS(), $path, ['maxItems' => $schema->maxItems]);
+            $this->addError(ConstraintError::MAX_ITEMS(), $path, ['maxItems' => $schema->maxItems, 'found' => count($value)]);
         }
 
         // Verify uniqueItems

tests/Constraints/MinItemsMaxItemsTest.php

@@ -9,34 +9,64 @@
 
 namespace JsonSchema\Tests\Constraints;
 
+use JsonSchema\Constraints\Constraint;
+
 class MinItemsMaxItemsTest extends BaseTestCase
 {
     protected $validateSchema = true;
 
     public function getInvalidTests(): array
     {
         return [
-            [
-                '{
+            'Input violating minItems constraint' => [
+                'input' => '{
                   "value":[2]
                 }',
-                '{
+                'schema' => '{
                   "type":"object",
                   "properties":{
                     "value":{"type":"array","minItems":2,"maxItems":4}
                   }
-                }'
+                }',
+                'checkMode' => Constraint::CHECK_MODE_NORMAL,
+                [[
+                    'property' => 'value',
+                    'pointer' => '/value',
+                    'message' => 'There must be a minimum of 2 items in the array, 1 found',
+                    'constraint' => [
+                        'name' => 'minItems',
+                        'params' => [
+                            'minItems' => 2,
+                            'found' => 1
+                        ]
+                    ],
+                    'context' => 1
+                ]]
             ],
-            [
-                '{
+            'Input violating maxItems constraint' => [
+                'input' => '{
                   "value":[2,2,5,8,5]
                 }',
-                '{
+                'schema' => '{
                   "type":"object",
                   "properties":{
                     "value":{"type":"array","minItems":2,"maxItems":4}
                   }
-                }'
+                }',
+                'checkMode' => Constraint::CHECK_MODE_NORMAL,
+                [[
+                    'property' => 'value',
+                    'pointer' => '/value',
+                    'message' => 'There must be a maximum of 4 items in the array, 5 found',
+                    'constraint' => [
+                        'name' => 'maxItems',
+                        'params' => [
+                            'maxItems' => 4,
+                            'found' => 5
+                        ]
+                    ],
+                    'context' => 1
+                ]]
             ]
         ];
     }