Fix VCS paths

.gitignore

@@ -8,3 +8,6 @@
 # phpunit
 /.phpunit.result.cache
 /reports
+
+# docs
+/docs/build

.gitlab-ci.yml

@@ -0,0 +1,69 @@
+stages:
+  - test
+  - report
+
+cache:
+  key: composer-cache
+  paths:
+    - .composer-cache/
+
+.test:
+  before_script:
+    # install system packages
+    - apt-get update && apt-get install -y git unzip
+    # install extensions
+    - if [ "$INSTALL_XDEBUG" -eq 1 ]; then curl --location https://github.com/FriendsOfPHP/pickle/releases/latest/download/pickle.phar --output pickle.phar; php pickle.phar install --defaults xdebug; docker-php-ext-enable xdebug; fi
+    # install composer
+    - php -r "copy('https://composer.github.io/installer.sig', '/tmp/composer.sig');"
+    - php -r "copy('https://getcomposer.org/installer', '/tmp/composer-setup.php');"
+    - php -r '$expected = file_get_contents("/tmp/composer.sig"); $actual = hash_file("sha384", "/tmp/composer-setup.php"); exit(intval(!hash_equals($expected, $actual)));'
+    - php /tmp/composer-setup.php --install-dir=/usr/local/bin --filename=composer
+    - chmod +x /usr/local/bin/composer
+    - rm /tmp/composer-setup.php /tmp/composer.sig
+    # cache dependencies
+    - composer config -g cache-dir "$(pwd)/.composer-cache"
+  script:
+    - composer update
+    - vendor/bin/phpunit
+
+# lowest version with lowest dependencies
+test-7.4-lowest:
+  extends: .test
+  stage: test
+  image: php:7.4
+  script:
+    - composer update --prefer-lowest
+    - vendor/bin/phpunit
+
+# lowest version
+test-7.4:
+  extends: .test
+  stage: test
+  image: php:7.4
+
+## current release
+test-8.0:
+  extends: .test
+  stage: test
+  image: php:8.0
+
+# latest unstable
+test-rc:
+  extends: .test
+  stage: test
+  image: php:rc
+  allow_failure: true
+
+# coverage
+coverage:
+  variables:
+    INSTALL_XDEBUG: 1
+  extends: .test
+  stage: report
+  only:
+    - master
+  image: php:8.0
+  script:
+    - composer update
+    - XDEBUG_MODE=coverage vendor/bin/phpunit --coverage-clover coverage.xml
+    - bash <(curl -s https://codecov.io/bash)

CHANGELOG.md

@@ -0,0 +1,7 @@
+# Changelog
+
+## 1.0.0
+
+*Nov 6, 2021*
+
+Initial release

LICENSE.md

@@ -0,0 +1,25 @@
+The MIT License (MIT)
+=====================
+
+Copyright © 2021 Anton Smirnov
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation
+files (the “Software”), to deal in the Software without
+restriction, including without limitation the rights to use,
+copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.

README.md

@@ -0,0 +1,55 @@
+# PHP Path Library
+
+[![Packagist](https://img.shields.io/packagist/v/arokettu/path.svg?style=flat-square)](https://packagist.org/packages/arokettu/path)
+[![PHP](https://img.shields.io/packagist/php-v/arokettu/path.svg?style=flat-square)](https://packagist.org/packages/arokettu/path)
+[![License](https://img.shields.io/packagist/l/arokettu/path.svg?style=flat-square)](https://opensource.org/licenses/MIT)
+[![Gitlab pipeline status](https://img.shields.io/gitlab/pipeline/sandfox/php-path/master.svg?style=flat-square)](https://gitlab.com/sandfox/php-path/-/pipelines)
+[![Codecov](https://img.shields.io/codecov/c/gl/sandfox/php-path?style=flat-square)](https://codecov.io/gl/sandfox/php-path/)
+
+A PHP library to work with absolute and relative paths.
+
+## Usage
+
+```php
+<?php
+
+use Arokettu\Path\PathUtils;
+use Arokettu\Path\RelativePath;
+use Arokettu\Path\UrlPath;
+
+// simple interface
+
+PathUtils::resolveRelativePath('/some/path', '../other/path');
+// => /some/other/path
+PathUtils::makeRelativePath('/some/path', '/some/other/path');
+// => ../other/path
+
+// OOP interface, more control
+
+$url = UrlPath::parse('https://example.com/some/path');
+$rel = RelativePath::unix('../other/path');
+$url->resolveRelative($rel)->toString();
+// => https://example.com/some/other/path
+```
+
+## Installation
+
+```bash
+composer require arokettu/path
+```
+
+## Documentation
+
+Read full documentation here: <https://sandfox.dev/php/path.html>
+
+Also on Read the Docs: <https://php-path.readthedocs.io/>
+
+## Support
+
+Please file issues on our main repo at GitLab: <https://gitlab.com/sandfox/path/-/issues>
+
+## License
+
+The library is available as open source under the terms of the [MIT License].
+
+[MIT License]: https://opensource.org/licenses/MIT

composer.json

@@ -4,6 +4,7 @@
     "keywords": ["paths", "relative path", "filesystem"],
     "type": "library",
     "license": "MIT",
+    "homepage": "https://sandfox.dev/php/path.html",
     "authors": [
         {
             "name": "Anton Smirnov",
@@ -14,7 +15,8 @@
     ],
     "support": {
         "source": "https://gitlab.com/sandfox/php-path",
-        "issues": "https://gitlab.com/sandfox/php-path/-/issues"
+        "issues": "https://gitlab.com/sandfox/php-path/-/issues",
+        "docs": "https://php-path.readthedocs.io/"
     },
     "config": {
         "sort-packages": true

docs/_templates/sidebar/brand.html

@@ -0,0 +1,22 @@
+<a class="sidebar-brand{% if logo %} centered{% endif %}" href="{{ pathto(master_doc) }}">
+    {% block brand_content %}
+    {%- if logo %}
+    <div class="sidebar-logo-container">
+        <img class="sidebar-logo" src="{{ pathto('_static/' + logo, 1) }}" alt="Logo"/>
+    </div>
+    {%- endif %}
+    {%- if theme_light_logo and theme_dark_logo %}
+    <div class="sidebar-logo-container">
+        <img class="sidebar-logo only-light" src="{{ pathto('_static/' + theme_light_logo, 1) }}" alt="Light Logo"/>
+        <img class="sidebar-logo only-dark" src="{{ pathto('_static/' + theme_dark_logo, 1) }}" alt="Dark Logo"/>
+    </div>
+    {%- endif %}
+    {% if not theme_sidebar_hide_name %}
+    <span class="sidebar-brand-text">{{ docstitle }}</span>
+    {%- endif %}
+    {% endblock brand_content %}
+</a>
+
+{%- if current_version -%}
+    <div class="sidebar-brand">{{ current_version }}</div>
+{%- endif -%}

docs/conf.py

@@ -0,0 +1,10 @@
+from datetime import datetime
+
+project = 'Path Library'
+author = 'Anton Smirnov'
+copyright = '{} {}'.format(datetime.now().year, author)
+language = 'en'
+
+html_title = project
+html_theme = 'furo'
+templates_path = ["_templates"]

docs/helper_classes.rst

@@ -0,0 +1,73 @@
+Helper Classes
+##############
+
+PathFactory
+===========
+
+``parse()``
+-----------
+
+.. code-block:: php
+
+    <?php
+    PathFactory::parse(
+        string $path,
+        array $urlSchemes = [],
+        array $streamSchemes = []
+    ): PathInterface;
+
+The ``parse`` function tries to detect the type of the given string path in the following order:
+
+* Unix path
+* Windows path
+* Url/Scheme paths:
+
+  * If both ``$urlSchemes`` and ``$streamSchemes`` are empty, all scheme prefixed paths are parsed as URLs.
+  * If at least one of the lists is non-empty, all unknown schemes throw an exception.
+  * Known schemes are parsed according to which list they belong.
+* Relative path of the current OS type.
+
+  * Since there is no way to separate root relative path from Unix path, root relative paths are never returned.
+
+All paths are returned by the ``parse()`` constructor in a non strict mode.
+
+PathUtils
+=========
+
+``resolveRelativePath()``
+-------------------------
+
+.. code-block:: php
+
+    <?php
+    PathUtils::resolveRelativePath(
+        string|PathInterface $basePath,
+        string|PathInterface $relativePath
+    ): string;
+
+Resolves relative path from the base path.
+
+If a string is passed: it goes through ``PathFactory::parse()``.
+
+If ``relativePath`` is an absolute path, it is converted to string and returned.
+
+Otherwise ``$basePath->resolveRelative($relativePath)->toString()`` is returned.
+
+``makeRelativePath()``
+----------------------
+
+.. code-block:: php
+
+    <?php
+    PathUtils::makeRelativePath(
+        string|AbsolutePathInterface $basePath,
+        string|AbsolutePathInterface $targetPath
+    ): string;
+
+Makes relative path from two absolute paths.
+
+If a string is passed: it goes through ``PathFactory::parse()``.
+
+If any of the paths is a relative path, an exception is thrown.
+
+Otherwise ``$basePath->makeRelative($targetPath)->toString()`` is returned.

docs/index.rst

@@ -0,0 +1,41 @@
+Path Library
+############
+
+|Packagist| |GitLab| |GitHub| |Bitbucket| |Gitea|
+
+A PHP library to work with absolute and relative paths.
+
+Installation
+============
+
+.. code-block:: bash
+
+   composer require arokettu/path
+
+Documentation
+=============
+
+.. toctree::
+   :maxdepth: 2
+
+   path_interfaces
+   path_classes
+   helper_classes
+
+License
+=======
+
+The library is available as open source under the terms of the `MIT License`_.
+
+.. _MIT License: https://opensource.org/licenses/MIT
+
+.. |Packagist|  image:: https://img.shields.io/packagist/v/arokettu/path.svg?style=flat-square
+   :target:     https://packagist.org/packages/arokettu/path
+.. |GitHub|     image:: https://img.shields.io/badge/get%20on-GitHub-informational.svg?style=flat-square&logo=github
+   :target:     https://github.com/arokettu/php-path
+.. |GitLab|     image:: https://img.shields.io/badge/get%20on-GitLab-informational.svg?style=flat-square&logo=gitlab
+   :target:     https://gitlab.com/sandfox/php-path
+.. |Bitbucket|  image:: https://img.shields.io/badge/get%20on-Bitbucket-informational.svg?style=flat-square&logo=bitbucket
+   :target:     https://bitbucket.org/sandfox/php-path
+.. |Gitea|      image:: https://img.shields.io/badge/get%20on-Gitea-informational.svg?style=flat-square&logo=gitea
+   :target:     https://sandfox.org/sandfox/php-path

docs/path_classes.rst

@@ -0,0 +1,159 @@
+Path Classes
+############
+
+RelativePath
+============
+
+The only concrete implementation of ``RelativePathInterface``.
+In non-root relative paths first component returned by ``getComponents()`` is either ``'.'`` or ``'..'``.
+
+When resolving relative, windows-ness of the resulting relative will be inherited from the base path.
+
+Available constructors:
+
+.. code-block:: php
+
+    <?php
+    new RelativePath(string $path, bool $windows = false);
+
+``$windows = false``: Unix-like path. Path separators are slashes.
+
+``$windows = true``: Windows-like path. Path separators are both slashes and backslashes.
+When exporting a string, backslashes are used.
+
+.. code-block:: php
+
+    <?php
+    RelativePath::unix(string $path): self;
+
+Same as ``new RelativePath($path, windows: false)``
+
+.. code-block:: php
+
+    <?php
+    RelativePath::windows(string $path): self;
+
+Same as ``new RelativePath($path, windows: true)``
+
+.. code-block:: php
+
+    <?php
+    RelativePath::currentOS(string $path): self;
+
+If Windows is detected, create a Windows-like path, otherwise create Unix-like path.
+
+.. note:: Windows is detected by the ``DIRECTORY_SEPARATOR`` constant.
+
+.. code-block:: php
+
+    <?php
+    RelativePath::parse(string $path): self;
+
+Alias of ``currentOS()``.
+
+FilesystemPath
+==============
+
+A base class for ``UnixPath`` and ``WindowsPath``.
+
+No default constructor, only a named constructor is available:
+
+.. code-block:: php
+
+    <?php
+    FilesystemPath::parse(string $path, bool $strict = false): self;
+
+If Windows is detected, create a Windows path, otherwise create a Unix path.
+Strict mode does not allow to have relative components that traverse beyond root.
+
+.. note:: Windows is detected by the ``DIRECTORY_SEPARATOR`` constant.
+
+.. code-block:: php
+
+    <?php
+    use Arokettu\Path\FilesystemPath;
+
+    // on windows
+    FilesystemPath::parse('C:\Windows\..\..\..\Users'); // C:\Users
+    FilesystemPath::parse('C:\Windows\..\..\..\Users' strict: true); // exception
+
+UnixPath
+--------
+
+A class for Unix paths.
+The prefix is ``'/'``
+
+.. code-block:: php
+
+    <?php
+    // these are equal
+    new UnixPath(string $path, bool $strict = false);
+    UnixPath::parse(string $path, bool $strict = false): self;
+
+WindowsPath
+-----------
+
+.. warning::
+    Windows usually have much more restrictions on file path than unix-like operating systems
+    like forbidding characters like ``|`` and ``:``.
+    The library doesn't check for that even in strict mode.
+
+A class for Windows paths.
+``makeRelative()`` returns relatives of the Windows-like type.
+
+Supported paths:
+
+* DOS-like paths.
+  The classic paths with a drive letter: ``C:\Path``.
+  Both slashes and backslashes are supported as component separators.
+  Relative components are resolved on creation like in most other classes here.
+  The prefix here is a drive letter.
+* UNC paths.
+  Examples:
+
+  * Local paths like ``\\*\C:\Path``. The prefix here is ``\\*\C:\``.
+  * Network paths like ``\\AROKETTUPC\c$``. The prefix here is ``\\AROKETTUPC\``.
+
+  UNC paths do not allow forward slashes and relative components.
+
+.. note::
+    Relative paths with drive letter like ``C:Path\Path`` are valid in Windows
+    but are not supported by the library in any way.
+
+.. code-block:: php
+
+    <?php
+    // these are equal
+    new WindowsPath(string $path, bool $strict = false);
+    WindowsPath::parse(string $path, bool $strict = false): self;
+
+UrlPath
+=======
+
+A class for URL paths.
+The prefix is scheme + hostname.
+
+.. code-block:: php
+
+    <?php
+    // these are equal
+    new UrlPath(string $path, bool $strict = false);
+    UrlPath::parse(string $path, bool $strict = false): self;
+
+StreamPath
+==========
+
+A class for PHP stream like paths.
+Examples include php streams like ``php://temp``.
+It can be useful with libraries that create virtual file systems like `adlawson/vfs`_ and `mikey179/vfsstream`_.
+The prefix is scheme.
+
+.. _adlawson/vfs: https://packagist.org/packages/adlawson/vfs
+.. _mikey179/vfsstream: https://packagist.org/packages/mikey179/vfsstream
+
+.. code-block:: php
+
+    <?php
+    // these are equal
+    new StreamPath(string $path, bool $strict = false);
+    StreamPath::parse(string $path, bool $strict = false): self;

docs/path_interfaces.rst

@@ -0,0 +1,131 @@
+Path Interfaces
+###############
+
+PathInterface
+=============
+
+``resolveRelative()``
+---------------------
+
+.. code-block:: php
+
+    <?php
+    public function resolveRelative(RelativePathInterface $path, bool $strict = false): self;
+
+Convert relative path to absolute or combine two relative paths using the caller object as base.
+
+
+.. code-block:: php
+
+    <?php
+    use Arokettu\Path\RelativePath;
+    use Arokettu\Path\UnixPath;
+
+    $path = UnixPath::parse('/some/path');
+    $rel1 = RelativePath::parse('../other/path');
+    // trailing slashes are preserved
+    $rel2 = RelativePath::parse('../diff/path/');
+
+    $path->resolveRelative($rel1); // /some/other/path
+    // trailing slash will be present if target path has it
+    $rel1->resolveRelative($rel2); // ../other/diff/path/
+
+Strict mode throws exception if traversal happens beyond root (no effect if the base path is relative):
+
+.. code-block:: php
+
+    <?php
+    use Arokettu\Path\RelativePath;
+    use Arokettu\Path\UnixPath;
+
+    $path = UnixPath::parse('/some/path');
+    $rel  = RelativePath::parse('../../../../etc/passwd');
+
+    $path->resolveRelative($rel); // /etc/passwd
+    $path->resolveRelative($rel, strict: true); // exception
+
+``getPrefix()``
+---------------
+
+Path prefix that you can't traverse beyond like root unix path, windows drive path (C:\\), and url hostname.
+
+``getComponents()``
+-------------------
+
+An array of path components excluding prefix.
+The last component of the path is empty string if path has trailing (back)slash
+
+``isAbsolute()``
+----------------
+
+``true`` for instances of ``AbsolutePathInterface``.
+``false`` for instances of ``RelativePathInterface``.
+
+``isRelative()``
+----------------
+
+``false`` for instances of ``AbsolutePathInterface``.
+``true`` for instances of ``RelativePathInterface``.
+
+``toString()`` & ``__toString()``
+---------------------------------
+
+Get string value of the path.
+
+AbsolutePathInterface
+=====================
+
+``makeRelative()``
+------------------
+
+.. code-block:: php
+
+    <?php
+    public function makeRelative(self $targetPath, ?\Closure $equals = null): RelativePathInterface;
+
+Make relative path from base path and target path of the same type having equal prefixes.
+The paths are treated as case sensitive unless ``$equals`` callback is provided.
+
+.. code-block:: php
+
+    <?php
+
+    use Arokettu\Path\UnixPath;
+    use Arokettu\Path\UrlPath;
+    use Arokettu\Path\WindowsPath;
+
+    $path1 = UnixPath::parse('/home/arokettu');
+    $path2 = UnixPath::parse('/home/sandfox/');
+    // there will be a trailing slash if target path has it
+    $path1->makeRelative($path2); // ../sandfox/
+
+    // ignore case on Windows
+    $path1 = WindowsPath::parse('c:\users\arokettu');
+    $path2 = WindowsPath::parse('C:\Users\SandFox');
+    $path1->makeRelative(
+        $path2,
+        fn ($a, $b) => strtoupper($a) === strtoupper($b)
+    ); // ..\SandFox
+
+    // resolve urlencoded url path
+    $path1 = UrlPath::parse('https://example.com/some%20path/child%20dir');
+    $path2 = UrlPath::parse('https://example.com/some path/child dir');
+    $path1->makeRelative(
+        $path2,
+        fn ($a, $b) => urldecode($a) === urldecode($b)
+    ); // .
+
+RelativePathInterface
+=====================
+
+``isRoot()``
+------------
+
+``true`` if the relative path is 'root path', i.e. full path excluding prefix.
+Examples:
+
+* ``\Users\SandFox`` for Windows path ``C:\Users\SandFox``
+* ``/some path/child dir`` for UrlPath ``https://example.com/some path/child dir``
+* Functionally equal to Unix path
+
+When applying root path in ``resolveRelative()``, it replaces the whole path excluding prefix.

docs/requirements.txt

@@ -0,0 +1 @@
+furo

src/AbstractAbsolutePath.php

@@ -20,6 +20,7 @@ abstract class AbstractAbsolutePath extends AbstractPath implements AbsolutePath
 
     /**
      * @param static $targetPath
+     * @param \Closure $equals(string $a, string $b): bool
      */
     public function makeRelative(AbsolutePathInterface $targetPath, ?\Closure $equals = null): RelativePathInterface
     {

src/PathFactory.php

@@ -20,7 +20,7 @@ final class PathFactory
             return self::parseUrlLike($path, $matches[1], $urlSchemes, $streamSchemes);
         }
 
-        return DIRECTORY_SEPARATOR === '\\' ? RelativePath::windows($path) : RelativePath::unix($path);
+        return RelativePath::currentOS($path);
     }
 
     private static function parseUrlLike(

src/PathUtils.php

@@ -0,0 +1,66 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Arokettu\Path;
+
+final class PathUtils
+{
+    /**
+     * @param string|PathInterface $basePath
+     * @param string|PathInterface $relativePath
+     * @return string
+     */
+    public static function resolveRelativePath($basePath, $relativePath): string
+    {
+        if (\is_string($basePath)) {
+            $basePath = PathFactory::parse($basePath);
+        }
+
+        if (\is_string($relativePath)) {
+            $relativePath = PathFactory::parse($relativePath);
+        }
+
+        if (!($basePath instanceof PathInterface)) {
+            throw new \InvalidArgumentException('basePath must be a string or an instance of PathInterface');
+        }
+
+        if ($relativePath instanceof RelativePathInterface) {
+            return $basePath->resolveRelative($relativePath)->toString();
+        } elseif ($relativePath instanceof AbsolutePathInterface) {
+            return $relativePath->toString();
+        }
+
+        throw new \InvalidArgumentException('relativePath must be a string or an instance of PathInterface');
+    }
+
+    /**
+     * @param string|AbsolutePathInterface $basePath
+     * @param string|AbsolutePathInterface $targetPath
+     * @return string
+     */
+    public static function makeRelativePath($basePath, $targetPath): string
+    {
+        if (\is_string($basePath)) {
+            $basePath = PathFactory::parse($basePath);
+        }
+
+        if (\is_string($targetPath)) {
+            $targetPath = PathFactory::parse($targetPath);
+        }
+
+        if (!($basePath instanceof AbsolutePathInterface) || !$basePath->isAbsolute()) {
+            throw new \InvalidArgumentException(
+                'basePath must be a string containing absolute path or an instance of AbsolutePathInterface'
+            );
+        }
+
+        if (!($targetPath instanceof AbsolutePathInterface) || !$targetPath->isAbsolute()) {
+            throw new \InvalidArgumentException(
+                'targetPath must be a string containing absolute path or an instance of AbsolutePathInterface'
+            );
+        }
+
+        return $basePath->makeRelative($targetPath)->toString();
+    }
+}

src/RelativePath.php

@@ -33,6 +33,14 @@ final class RelativePath extends AbstractPath implements RelativePathInterface
         return new self($path, DIRECTORY_SEPARATOR === '\\');
     }
 
+    /**
+     * @codeCoverageIgnore OS specific
+     */
+    public static function parse(string $path): self
+    {
+        return self::currentOS($path);
+    }
+
     public function isAbsolute(): bool
     {
         return false;

tests/PathUtilsTest.php

@@ -0,0 +1,60 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Arokettu\Path\Tests;
+
+use Arokettu\Path\PathUtils;
+use PHPUnit\Framework\TestCase;
+
+class PathUtilsTest extends TestCase
+{
+    public function testMakeRelative(): void
+    {
+        self::assertEquals(
+            '../../.config/composer',
+            PathUtils::makeRelativePath(
+                '/home/arokettu/tmp/test',
+                '/home/arokettu/.config/composer',
+            ),
+        );
+
+        self::assertEquals(
+            '..\..\AppData\Roaming',
+            PathUtils::makeRelativePath(
+                'C:\Users\Arokettu\tmp\test',
+                'C:\Users\Arokettu\AppData\Roaming',
+            ),
+        );
+    }
+
+    public function testResolveRelative(): void
+    {
+        // any, absolute
+        self::assertEquals(
+            '/home/arokettu/.config/composer',
+            PathUtils::resolveRelativePath(
+                '/home/arokettu/tmp/test',
+                '/home/arokettu/.config/composer',
+            ),
+        );
+
+        // absolute, relative
+        self::assertEquals(
+            '/home/arokettu/.config/composer',
+            PathUtils::resolveRelativePath(
+                '/home/arokettu/tmp/test',
+                '../../.config/composer',
+            ),
+        );
+
+        // relative, relative
+        self::assertEquals(
+            '.config/composer',
+            PathUtils::resolveRelativePath(
+                './tmp/test',
+                '../../.config/composer',
+            ),
+        );
+    }
+}