[GH-28] Fix Rename class and namespace, adding slices

Author: beberlei

features/fix_class_names.feature

@@ -249,3 +249,41 @@ Feature: Fix Class Names
              {
              }
             """
+    Scenario: "Renaming a slice of a namespace"
+        Given a PHP File named "src/Foo/Bar/Baz/Boing.php" with:
+            """
+            <?php
+            namespace Foo\Foo;
+
+            class Foo
+            {
+            }
+            """
+        Given a PHP File named "src/index.php" with:
+            """
+            <?php
+            $foo = new \Foo\Foo\Foo();
+            """
+        When I use refactoring "fix-class-names" with:
+            | arg   | value |
+            | dir   | src/  |
+        Then the PHP File "src/Foo.php" should be refactored:
+            """
+            --- a/src/Foo/Bar/Baz/Boing.php
+            +++ b/src/Foo/Bar/Baz/Boing.php
+           @@ -1,6 +1,6 @@
+             <?php
+            -namespace Foo\Foo;
+            +namespace Foo\Bar\Baz;
+
+            -class Foo
+            +class Boing
+             {
+             }
+            --- a/index.php
+            +++ b/index.php
+            @@ -1,2 +1,2 @@
+             <?php
+            -$foo = new \Foo\Foo\Foo();
+            +$foo = new \Foo\Bar\Baz\Boing();
+            """

src/main/QafooLabs/Refactoring/Domain/Model/PhpName.php

@@ -100,7 +100,12 @@ public function change(PhpName $from, PhpName $to)
             }
         }
 
-        $relativeNewParts = array_slice($newParts, -1 * count(explode('\\', $this->relativeName)));
+        if ($this->fullyQualifiedName === $this->relativeName) {
+            $relativeNewParts = $newParts;
+        } else {
+            $relativeNewParts = array_slice($newParts, -1 * count(explode('\\', $this->relativeName)));
+        }
+
         return new PhpName(implode('\\', $newParts), implode('\\', $relativeNewParts));
     }
 

src/test/QafooLabs/Refactoring/Domain/Model/PhpNameTest.php

@@ -110,4 +110,16 @@ public function testRegression5()
         $this->assertEquals('Qafoo\ChangeTrack\Analyzer\ChangeFeed', $changed->fullyQualifiedName());
         $this->assertEQuals('ChangeFeed', $changed->relativeName());
     }
+
+    public function testRegression6()
+    {
+        $from = new PhpName('Foo\Foo\Foo', 'Foo');
+        $to = new PhpName('Foo\Bar\Baz\Boing', 'Boing');
+
+        $name = new PhpName('Foo\Foo\Foo', 'Foo\Foo\Foo');
+        $changed = $name->change($from, $to);
+
+        $this->assertEquals('Foo\Bar\Baz\Boing', $changed->fullyQualifiedName());
+        $this->assertEquals('Foo\Bar\Baz\Boing', $changed->relativeName());
+    }
 }