Allow to pass an array of files instead of a single file

Generally we have multiple changed files, so this makes it easier to
use that.

README.md

@@ -18,7 +18,7 @@ $finder = new DependencyFinder([__DIR__.'/src/',  './vendor/psr/container/src',
 
 $finder->build();
 
-$deps = $finder->getAllFilesDependingOn('./tests/Fixtures/Circular/A.php');
+$deps = $finder->getAllFilesDependingOn(['./tests/Fixtures/Circular/A.php']);
 
 foreach ($deps as $dep) {
     var_dump($dep);

src/Dependency/DependencyResolver.php

@@ -6,6 +6,7 @@
 
 use function array_key_exists;
 use function array_push;
+use function realpath;
 
 class DependencyResolver
 {
@@ -32,17 +33,21 @@ class DependencyResolver
     private $declareMap = [];
 
     /**
+     * @param array<string>                $fileNames
      * @param array<string, array<string>> $declareMap
      * @param array<string, array<string>> $dependantMap
      *
      * @return array<string>
      */
-    public function resolve(string $fileName, array $declareMap, array $dependantMap) : array
+    public function resolve(array $fileNames, array $declareMap, array $dependantMap) : array
     {
         $this->declareMap   = $declareMap;
         $this->dependantMap = $dependantMap;
-        foreach ($this->declareMap[$fileName]?? [] as $class) {
-            $this->resolveClass($class);
+        foreach ($fileNames as $fileName) {
+            $fileName = realpath($fileName);
+            foreach ($this->declareMap[$fileName]?? [] as $class) {
+                $this->resolveClass($class);
+            }
         }
 
         return $this->knownDependencies;

src/DependencyFinder.php

@@ -17,7 +17,6 @@
 use Symfony\Component\Finder\SplFileInfo;
 use function array_unique;
 use function file_get_contents;
-use function realpath;
 
 class DependencyFinder
 {
@@ -84,16 +83,13 @@ public function build() : void
     }
 
     /**
+     * @param array<string> $fileNames
+     *
      * @return array<string>
      */
-    public function getAllFilesDependingOn(string $fileName) : array
+    public function getAllFilesDependingOn(array $fileNames) : array
     {
-        $path = realpath($fileName);
-        if ($path === false) {
-            return [];
-        }
-
-        return(new DependencyResolver())->resolve($path, $this->declareMap, $this->dependantMap);
+        return(new DependencyResolver())->resolve($fileNames, $this->declareMap, $this->dependantMap);
     }
 
     /**

tests/DependencyFinderTest.php

@@ -14,7 +14,7 @@ public function testItCanDealWithCircularDependencies() : void
         $finder = new DependencyFinder([__DIR__ . '/Fixtures/Circular']);
 
         $finder->build();
-        $deps = $finder->getAllFilesDependingOn(__DIR__ . '/Fixtures/Circular/A.php');
+        $deps = $finder->getAllFilesDependingOn([__DIR__ . '/Fixtures/Circular/A.php']);
 
         $this->assertCount(2, $deps);
     }
@@ -24,7 +24,7 @@ public function testAWrongFileReturnsNoDependencies() : void
         $finder = new DependencyFinder([__DIR__ . '/Fixtures/Circular']);
         $finder->build();
 
-        $deps = $finder->getAllFilesDependingOn(__FILE__ . 'asdf');
+        $deps = $finder->getAllFilesDependingOn([__FILE__ . 'asdf']);
         $this->assertCount(0, $deps);
     }
 }

tests/PHPParser/Visitor/DeclarationCollectorTest.php

@@ -0,0 +1,50 @@
+<?php
+
+namespace Depend\Test\PHPParser\Visitor;
+
+use Depend\PHPParser\Visitor\DeclarationCollector;
+use Depend\PHPParser\Visitor\NameCollector;
+use Depend\PHPParser\Visitor\ParentConnectorVisitor;
+use PhpParser\NodeTraverser;
+use PhpParser\NodeVisitor\NameResolver;
+use PhpParser\ParserFactory;
+use PHPUnit\Framework\TestCase;
+
+class DeclarationCollectorTest extends TestCase
+{
+
+    public function testItFindsAllDeclaredNames(): void
+    {
+        $parser    = (new ParserFactory())->create(ParserFactory::PREFER_PHP7);
+        $nodes     = $parser->parse(<<<'PHP'
+<?php
+namespace F;
+
+
+class Foo 
+{
+    public function __construct(Bar\Baz $a) {}
+    public function hello(\Full\Name $b): string 
+    {
+        return false;
+    }
+}
+
+interface B{}
+PHP
+        );
+        $traverser = new NodeTraverser();
+        $traverser->addVisitor(new NameResolver());
+        $traverser->addVisitor(new ParentConnectorVisitor());
+        $declareCollector = new DeclarationCollector();
+        $traverser->addVisitor($declareCollector);
+        $traverser->traverse($nodes);
+
+        $this->assertCount(2, $declareCollector->declared);
+        $this->assertSame([
+            'F\Foo',
+            'F\B',
+        ], $declareCollector->declared);
+    }
+
+}