add enum case to StringClassNameToClassConstantRector (#7710)

Author: TomasVotruba

rules-tests/Php55/Rector/String_/StringClassNameToClassConstantRector/Fixture/cover_enum.php.inc

@@ -0,0 +1,27 @@
+<?php
+
+namespace Rector\Tests\Php55\Rector\String_\StringClassNameToClassConstantRector\Fixture;
+
+final class CoverEnum
+{
+    public function run()
+    {
+        $enumClass = 'Rector\Tests\Php55\Rector\String_\StringClassNameToClassConstantRector\Source\SomeEnum';
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\Tests\Php55\Rector\String_\StringClassNameToClassConstantRector\Fixture;
+
+final class CoverEnum
+{
+    public function run()
+    {
+        $enumClass = \Rector\Tests\Php55\Rector\String_\StringClassNameToClassConstantRector\Source\SomeEnum::class;
+    }
+}
+
+?>

rules-tests/Php55/Rector/String_/StringClassNameToClassConstantRector/Source/SomeEnum.php

@@ -0,0 +1,7 @@
+<?php
+
+namespace Rector\Tests\Php55\Rector\String_\StringClassNameToClassConstantRector\Source;
+
+enum SomeEnum
+{
+}