write tests for MatchFieldFieldValidationRule

Hi @g089h515r806 please review the patch. thanks

hi MukhtarM， thanks for your patch. this is my reply:

1, "match against a field", this validation rule always do a entity query, it does not mean match a field in the same entity.

2,

+    $this->assertConstraintFail(
+      $this->entity,
+      self::FIELD_NAME_OTHER,
+      'field_name_value',
+      $this->ruleSet
+    );

should be.

+    $this->assertConstraintPass(
+      $this->entity,
+      self::FIELD_NAME,
+      'field_name_value'
+    );

If it does not pass, there maybe an error in the test.

3,

+    $this->assertConstraintPass(
+      $this->entity, 
+      self::FIELD_NAME, 
+      self::FIELD_NAME_OTHER
+    );

self::FIELD_NAME_OTHER should be a field value, not field name, it is confusing.

4, do not set the reverse to TRUE.

a new patch

@g089h515r806 thanks for the clarifications.

Automatically closed - issue fixed for 2 weeks with no activity.