Added unit test for #1631

Author: adamwojs

src/test/java/fr/adrienbrault/idea/symfony2plugin/tests/completion/yaml/YamlGotoCompletionRegistrarTest.java

@@ -101,4 +101,14 @@ public void testThatDecoratesPrioritizeLookupElementOnInstance() {
             lookupElement -> "foo".equals(lookupElement.getItemText()) && lookupElement.isItemTextBold() && lookupElement.isItemTextBold()
         );
     }
+
+    public void testThatPhpConstAreCompletedAndNavigable() {
+        assertCompletionIsEmpty(YAMLFileType.YML, "" +
+                "services:\n" +
+                "    foo:\n" +
+                "       class: Foo\\Foobar\n" +
+                "       arguments: \n" +
+                "           - !php/const Foo\\Bar<caret>::BAZ\n"
+        );
+    }
 }

src/test/java/fr/adrienbrault/idea/symfony2plugin/tests/completion/yaml/fixtures/YamlGotoCompletionRegistrar.php

@@ -4,10 +4,13 @@
 {
     class Bar
     {
+        public const BAZ = 'baz';
+
         public function create() {}
     }
 
     class Foobar extends Bar
     {
+        public function __construct($arg = null) {}
     }
 }