From 898f07d360121627813fb31a0eda33d9642d36f4 Mon Sep 17 00:00:00 2001
From: Jonathan Fontes <jonathan.alexey16@gmail.com>
Date: Mon, 18 May 2020 21:03:45 +0100
Subject: [PATCH] ADD: isAlias

---
 src/Container.php         | 10 ++++++++++
 tests/AliasMethodTest.php | 11 +++++++++++
 2 files changed, 21 insertions(+)

diff --git a/src/Container.php b/src/Container.php
index d929e30..31565db 100644
--- a/src/Container.php
+++ b/src/Container.php
@@ -127,6 +127,16 @@ public function has($id)
             array_key_exists($id, $this->aliases);
     }
 
+    /**
+     * @param string $id
+     *
+     * @return bool
+     */
+    public function isAlias($id)
+    {
+        return true === array_key_exists($id, $this->aliases);
+    }
+
     /**
      * @param string $id
      * @param array<string, mixed> $arguments
diff --git a/tests/AliasMethodTest.php b/tests/AliasMethodTest.php
index 086c93d..2b5e374 100644
--- a/tests/AliasMethodTest.php
+++ b/tests/AliasMethodTest.php
@@ -61,6 +61,17 @@ public function testAliasOneVarToAnotherVar()
         self::assertSame($container->get('foobar'), $container->get('hello'));
     }
 
+    public function testCanCheckIfEntryIsAliases()
+    {
+        $container = new Container();
+        $container->factory('myEntry', ['1', '2', '3']);
+        $container->alias('myEntry', 'myEntryAlias');
+
+        self::assertTrue($container->isAlias('myEntryAlias'));
+        self::assertFalse($container->isAlias('myEntry'));
+        self::assertFalse($container->isAlias('notExists'));
+    }
+
     public function testCanUseMakeOverAlias()
     {
         $container = new Container();