Reject empty path

Author: julienfalque

src/Console/ConfigurationResolver.php

@@ -380,6 +380,10 @@ public function getPath()
             } else {
                 $this->path = array_map(
                     static function ($path) use ($cwd, $filesystem) {
+                        if ('' === $path) {
+                            throw new InvalidConfigurationException('Invalid path: "".');
+                        }
+
                         $absolutePath = $filesystem->isAbsolutePath($path)
                             ? $path
                             : $cwd.\DIRECTORY_SEPARATOR.$path;

tests/Console/ConfigurationResolverTest.php

@@ -344,6 +344,30 @@ public function testResolvePathRelativeB()
         static::assertSame([__DIR__], $resolver->getPath());
     }
 
+    /**
+     * @dataProvider provideEmptyPathCases
+     */
+    public function testRejectInvalidPath(array $paths)
+    {
+        $resolver = $this->createConfigurationResolver(
+            ['path' => $paths],
+            null,
+            \dirname(__DIR__)
+        );
+
+        $this->expectException(InvalidConfigurationException::class);
+        $this->expectExceptionMessage('Invalid path: "".');
+
+        $resolver->getPath();
+    }
+
+    public function provideEmptyPathCases()
+    {
+        yield [['']];
+        yield [[__DIR__, '']];
+        yield [['', __DIR__]];
+    }
+
     public function testResolvePathWithFileThatIsExcludedDirectlyOverridePathMode()
     {
         $config = new Config();