Sort candidates by file path length

The lengthiest paths are the ones who have the most in common with the
provided class name, and should thus be given priority.
Fixes phpactor/phpactor#712

Author: greg0ire

lib/Adapter/Composer/ComposerFileToClass.php

@@ -103,6 +103,10 @@ private function populateCandidates(FilePath $filePath, array $prefixes)
             }
         }
 
+        usort($candidates, function (array $leftCandidate, array $rightCandidate): int {
+            return strlen($rightCandidate[0]) <=> strlen($leftCandidate[0]);
+        });
+
         return $candidates;
     }
 }

tests/Integration/Composer/ComposerFileToClassTest.php

@@ -107,6 +107,16 @@ public function testPsr4Fallback()
         ]);
     }
 
+    public function testNestedPsr4Directories()
+    {
+        $this->loadExample('psr4-nested.json');
+        $this->assertFilePathToClassName('/psr4/AppBundle/Foo.php', [
+            'AppBundle\\Foo',
+            'App\\AppBundle\\Foo'
+        ]);
+    }
+
+
     /**
      * @testdox Loads from classmap
      */

tests/Integration/Composer/composers/psr4-nested.json

@@ -0,0 +1,16 @@
+{
+    "name": "dantleech/basic",
+    "authors": [
+        {
+            "name": "dantleech",
+            "email": "dan.t.leech@gmail.com"
+        }
+    ],
+    "require": {},
+    "autoload": {
+        "psr-4": {
+            "App\\": "psr4/",
+            "AppBundle\\": "psr4/AppBundle/"
+        }
+    }
+}