Логика проверки ключа из KeyConfirmationForm вынесена в отдельный валидатор

У EmailActivationFixture зафиксирован стандартный путь к файлу данных

tests/codeception/api/unit/validators/EmailActivationKeyValidatorTest.php

@@ -0,0 +1,76 @@
+<?php
+namespace codeception\api\unit\validators;
+
+use api\validators\EmailActivationKeyValidator;
+use Codeception\Specify;
+use common\models\confirmations\ForgotPassword;
+use common\models\EmailActivation;
+use tests\codeception\api\unit\DbTestCase;
+use tests\codeception\common\_support\ProtectedCaller;
+use tests\codeception\common\fixtures\EmailActivationFixture;
+
+/**
+ * @property EmailActivationFixture $emailActivations
+ */
+class EmailActivationKeyValidatorTest extends DbTestCase {
+    use Specify;
+    use ProtectedCaller;
+
+    public function fixtures() {
+        return [
+            'emailActivations' => EmailActivationFixture::class,
+        ];
+    }
+
+    public function testFindEmailActivationModel() {
+        $this->specify('get EmailActivation model for exists key', function() {
+            $key = array_values($this->emailActivations->data)[0]['key'];
+            $model = new EmailActivationKeyValidator();
+            /** @var EmailActivation $result */
+            $result = $this->callProtected($model, 'findEmailActivationModel', $key);
+            expect($result)->isInstanceOf(EmailActivation::class);
+            expect($result->key)->equals($key);
+        });
+
+        $this->specify('get null model for exists key', function() {
+            $model = new EmailActivationKeyValidator();
+            expect($this->callProtected($model, 'findEmailActivationModel', 'invalid-key'))->null();
+        });
+    }
+
+    public function testValidateValue() {
+        $this->specify('get error.key_not_exists with validation wrong key', function () {
+            /** @var EmailActivationKeyValidator $model */
+            $model = new class extends EmailActivationKeyValidator {
+                public function findEmailActivationModel($key) {
+                    return null;
+                }
+            };
+            expect($this->callProtected($model, 'validateValue', null))->equals([$model->notExist, []]);
+        });
+
+        $this->specify('get error.key_expire if we use old key', function () {
+            /** @var EmailActivationKeyValidator $model */
+            $model = new class extends EmailActivationKeyValidator {
+                public function findEmailActivationModel($key) {
+                    $codeModel = new ForgotPassword();
+                    $codeModel->created_at = time() - $codeModel->expirationTimeout - 10;
+
+                    return $codeModel;
+                }
+            };
+            expect($this->callProtected($model, 'validateValue', null))->equals([$model->expired, []]);
+        });
+
+        $this->specify('no errors, if model exists and not expired', function () {
+            /** @var EmailActivationKeyValidator $model */
+            $model = new class extends EmailActivationKeyValidator {
+                public function findEmailActivationModel($key) {
+                    return new EmailActivation();
+                }
+            };
+            expect($this->callProtected($model, 'validateValue', null))->null();
+        });
+    }
+
+}