Issue #3369907 by sumit-k, g089h515r806: Write tests for ItemCountFieldValidationRule

tests/src/Kernel/Plugin/FieldValidationRule/ItemCountFieldValidationRuleTest.php

+<?php
+
+namespace Drupal\Tests\field_validation\Kernel\Plugin\FieldValidationRule;
+
+use Drupal\field\Entity\FieldConfig;
+use Drupal\field\Entity\FieldStorageConfig;
+use Drupal\node\Entity\NodeType;
+use Drupal\field_validation\Plugin\Validation\Constraint\FieldValidationConstraint;
+
+/**
+ * Tests ItemCountFieldValidationRule.
+ *
+ * @group field_validation
+ *
+ * @package Drupal\Tests\field_validation\Kernel
+ */
+class ItemCountFieldValidationRuleTest extends FieldValidationRuleBase {
+
+  /**
+   * Entity interface.
+   *
+   * @var \Drupal\Core\Entity\EntityInterface
+   */
+  protected $entity;
+
+  /**
+   * Field name.
+   */
+  const FIELD_NAME = 'field_item_count';
+
+  /**
+   * Rule id.
+   */
+  const RULE_ID = 'item_count_field_validation_rule';
+
+  /**
+   * Rule title.
+   */
+  const RULE_TITLE = 'validation rule item count';
+
+  /**
+   * Stores mock ruleset.
+   *
+   * @var \Drupal\field_validation\Entity\FieldValidationRuleSet
+   */
+  protected $ruleSet;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp(): void {
+    parent::setUp();
+
+    NodeType::create([
+      'type' => 'article',
+      'label' => 'Article',
+    ])->save();
+    FieldStorageConfig::create([
+      'entity_type' => 'node',
+      'field_name' => self::FIELD_NAME,
+      'type' => 'text',
+      'cardinality' => 4,
+    ])->save();
+    FieldConfig::create([
+      'entity_type' => 'node',
+      'field_name' => self::FIELD_NAME,
+      'bundle' => 'article',
+    ])->save();
+
+    $this->ruleSet = $this->ruleSetStorage->create([
+      'name' => 'item_count_test',
+      'entity_type' => 'node',
+      'bundle' => 'article',
+    ]);
+    $this->ruleSet->addFieldValidationRule([
+      'id' => self::RULE_ID,
+      'title' => self::RULE_TITLE,
+      'weight' => 1,
+      'field_name' => self::FIELD_NAME,
+      'column' => 'value',
+      'error_message' => 'Item count error!',
+      'data' => [
+        'min' => 1,
+        'max' => 3,
+      ],
+    ]);
+    $this->ruleSet->save();
+
+    $field_values = array_merge(['one'], ['two'], ['three'], ['four']);
+
+    $this->entity = $this->nodeStorage->create([
+      'type' => 'article',
+      'title' => 'test count',
+      self::FIELD_NAME => $field_values,
+    ]);
+    $this->entity->get(self::FIELD_NAME)
+      ->getFieldDefinition()
+      ->addConstraint(
+        'FieldValidationConstraint',
+        ['ruleset_name' => $this->ruleSet->getName()]
+      );
+
+  }
+
+  /**
+   * Tests ItemCountFieldValidationRule.
+   */
+  public function testItemCount() {
+
+    $entity = $this->entity;
+    $fieldName = self::FIELD_NAME;
+    $ruleSet = $this->ruleSet;
+
+    $violations = $entity->validate();
+
+    $this->assertCount(4, $violations);
+    $this->assertInstanceOf(
+      FieldValidationConstraint::class,
+      $violations[0]->getConstraint()
+    );
+    $this->assertEquals(
+      $ruleSet->getName(),
+      $violations[0]->getConstraint()->ruleset_name
+    );
+
+    $this->updateSettings(
+      [
+        'min' => '1',
+        'max' => '5',
+      ],
+      self::RULE_ID,
+      self::RULE_TITLE,
+      $this->ruleSet,
+      self::FIELD_NAME
+    );
+
+    $this->assertConstraintPass(
+      $this->entity,
+      self::FIELD_NAME,
+      '3',
+    );
+
+  }
+
+}