Fix entity class name inflection.

Closes #12390.

src/ORM/Table.php

@@ -773,7 +773,7 @@ public function getEntityClass()
                 return $this->_entityClass = $default;
             }
 
-            $alias = Inflector::classify(Inflector::singularize(Inflector::underscore(substr(array_pop($parts), 0, -5))));
+            $alias = Inflector::classify(Inflector::underscore(substr(array_pop($parts), 0, -5)));
             $name = implode('\\', array_slice($parts, 0, -1)) . '\\Entity\\' . $alias;
             if (!class_exists($name)) {
                 return $this->_entityClass = $default;

tests/TestCase/ORM/TableTest.php

@@ -1519,6 +1519,13 @@ class_alias($class, 'TestApp\Model\Entity\CustomCookie');
 
         $table = $this->getTableLocator()->get('CustomCookies');
         $this->assertEquals('TestApp\Model\Entity\CustomCookie', $table->getEntityClass());
+
+        if (!class_exists('TestApp\Model\Entity\Address')) {
+            class_alias($class, 'TestApp\Model\Entity\Address');
+        }
+
+        $table = $this->getTableLocator()->get('Addresses');
+        $this->assertEquals('TestApp\Model\Entity\Address', $table->getEntityClass());
     }
 
     /**

tests/test_app/TestApp/Model/Table/AddressesTable.php

@@ -0,0 +1,22 @@
+<?php
+/**
+ * CakePHP(tm) : Rapid Development Framework (https://cakephp.org)
+ * Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
+ *
+ * Licensed under The MIT License
+ * Redistributions of files must retain the above copyright notice
+ *
+ * @copyright     Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
+ * @since         3.6.9
+ * @license       https://opensource.org/licenses/mit-license.php MIT License
+ */
+namespace TestApp\Model\Table;
+
+use Cake\ORM\Table;
+
+/**
+ * Addresses table class
+ */
+class AddressesTable extends Table
+{
+}