Implemented support for the "exclude-pattern" parameter

As of squizlabs/PHP_CodeSniffer#1488, Filter::accept() doesn't strictly check the real path of the files, so intstead of using reflection and calling its protected methods, we can use the filter itself.

Closes #4.

composer.json

@@ -11,7 +11,7 @@
   "require": {
     "jean85/pretty-package-versions": "^1.0.3",
     "morozov/bootstrap": "^1.1",
-    "squizlabs/php_codesniffer": "^3.1",
+    "squizlabs/php_codesniffer": "^3.3",
     "php": "^7.1"
   },
   "require-dev": {

src/Iterator.php

@@ -2,12 +2,12 @@
 
 namespace DiffSniffer;
 
-use EmptyIterator;
+use function iterator_to_array;
 use IteratorIterator;
 use PHP_CodeSniffer\Config;
 use PHP_CodeSniffer\Files\DummyFile;
 use PHP_CodeSniffer\Files\File;
-use PHP_CodeSniffer\Filters\Filter as BaseFilter;
+use PHP_CodeSniffer\Filters\Filter;
 use PHP_CodeSniffer\Ruleset;
 use RecursiveArrayIterator;
 use Traversable;
@@ -48,14 +48,16 @@ public function __construct(Traversable $files, Changeset $changeSet, Ruleset $r
     public function getIterator() : Traversable
     {
         $it = new IteratorIterator($this->files);
-        $it = new Filter($it, new BaseFilter(
-            new RecursiveArrayIterator(
-                new EmptyIterator()
-            ),
-            '',
+        $it = new RecursiveArrayIterator(
+            iterator_to_array($it)
+        );
+
+        $it = new Filter(
+            $it,
+            "\0",
             $this->config,
             $this->ruleSet
-        ));
+        );
 
         foreach ($it as $path) {
             yield $this->createFile(

tests/ApplicationTest.php

@@ -46,6 +46,10 @@ public static function useCaseProvider()
                 'excluded-rule-cache',
                 0,
             ],
+            'exclude-pattern' => [
+                'exclude-pattern',
+                1,
+            ],
         ];
     }
 }

tests/fixtures/exclude-pattern/changeset.diff

@@ -0,0 +1,18 @@
+diff --git a/main.php b/main.php
+`--- /dev/null
++++ b/main.php
+@@ -0,0 +1,5 @@
++<?php
++
++if ( ! isset($foo)) {
++    $foo = 'bar';
++}
+diff --git a/excluded/excluded.php b/excluded/excluded.php
+`--- /dev/null
++++ b/excluded/excluded.php
+@@ -0,0 +1,5 @@
++<?php
++
++if ( ! isset($foo)) {
++    $foo = 'bar';
++}

tests/fixtures/exclude-pattern/output.txt

@@ -0,0 +1,10 @@
+
+FILE: main.php
+----------------------------------------------------------------------
+FOUND 1 ERROR AFFECTING 1 LINE
+----------------------------------------------------------------------
+ 3 | ERROR | [x] Expected 0 spaces after opening bracket; 1 found
+----------------------------------------------------------------------
+PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
+----------------------------------------------------------------------
+

tests/fixtures/exclude-pattern/tree/excluded/excluded.php

@@ -0,0 +1,5 @@
+<?php
+
+if ( ! isset($foo)) {
+    $foo = 'bar';
+}

tests/fixtures/exclude-pattern/tree/main.php

@@ -0,0 +1,5 @@
+<?php
+
+if ( ! isset($foo)) {
+    $foo = 'bar';
+}

tests/fixtures/exclude-pattern/tree/phpcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0"?>
+<ruleset>
+    <rule ref="PSR2">
+        <exclude-pattern>excluded/*</exclude-pattern>
+    </rule>
+</ruleset>