✨ Implement ObjectProxy class

.ac-php-conf.json

@@ -0,0 +1,22 @@
+{
+  "use-cscope": null,
+  "tag-dir": null,
+  "filter": {
+    "php-file-ext-list": [
+      "php"
+    ],
+    "php-path-list": [
+      "."
+    ],
+    "ignore-ruleset": [
+      "# like .gitignore file ",
+      "/vendor/**/[tT]ests/**/*.php",
+      "/vendor/**/[Ee]xamples/**/*.php",
+      "/vendor/composer/*.php",
+      "/vendor/*.php",
+      "# not need php_codesniffer",
+      "/vendor/squizlabs/php_codesniffer/**/*.php",
+      "#  -- end -- "
+    ]
+  }
+}

README.md

@@ -22,12 +22,8 @@ TODO: Make sure the following URLs are correct and working for your project.
 
 ## About
 
-<!--
-TODO: Use this space to provide more details about your package. Try to be
-      concise. This is the introduction to your package. Let others know what
-      your package does and how it can help them build applications.
--->
-
+A debugging/testing tool which allows access to an object's or class's private
+and protected properties and methods without the use of Reflection.
 
 This project adheres to a [code of conduct](CODE_OF_CONDUCT.md).
 By participating in this project and its community, you are expected to
@@ -42,33 +38,57 @@ Install this package as a dependency using [Composer](https://getcomposer.org).
 composer require danjones000/object-spy
 ```
 
-<!--
 ## Usage
 
-Provide a brief description or short example of how to use this library.
-If you need to provide more detailed examples, use the `docs/` directory
-and provide a link here to the documentation.
-
 ``` php
-use Danjones000\Spy\Example;
+use Danjones000\Spy\ObjectProxy;
 
-$example = new Example();
-echo $example->greet('fellow human');
+$object = new Object(); // Can be any object.
+
+$spy = new ObjectProxy($object);
+
+// Access private property
+echo $spy->privateProperty;
+
+// Set private property
+$spy->privateProperty = 42;
+
+// Call private method
+$spy->privateMethod();
+
+// Call private method with parameters
+$spy->protectedMethod(42, false);
+
+// Run arbitry code on object, allows passing in parameters
+// All arguments after the closure are passed as arguments to the closure itself
+$spy->call(fn ($abc) => $this->someProp = $this->someMethod($abc) * static::MULTIPLIER, 500);
+
+// PHP allows static methods to be called non-statically, so, this works as well
+$spy->staticPrivateMethod();
+
+// Can also access static properties/methods without an object instance
+$staticSpy = new ObjectProxy(Object::class);
+
+// If there is an Object::$privateStaticProperty
+echo $staticSpy->privateStaticProperty;
+$staticSpy->privateStaticProperty = 42;
+
+$staticSpy->privateStaticMethod();
+
+// No direct access to contstants, but we can do this
+$staticSpy->call(fn () => static::PRIVATE_CONSTANT); // self also works, of course
 ```
--->
 
+## Implementation notes
+
+This class does not use reflections in its operation. Instead, if uses closures
+that are bound to the instance or class.
 
 ## Contributing
 
 Contributions are welcome! To contribute, please familiarize yourself with
 [CONTRIBUTING.md](CONTRIBUTING.md).
 
-
-
-
-
-
-
 ## Copyright and License
 
 The danjones000/object-spy library is copyright © [Dan Jones](https://danielrayjones.com/)

phpcs.xml.dist

@@ -8,6 +8,6 @@
     <file>./src</file>
     <file>./tests</file>
 
-    <rule ref="Ramsey"/>
+    <rule ref="PSR12"/>
 
 </ruleset>

phpstan.neon.dist

@@ -4,3 +4,7 @@ parameters:
     paths:
         - ./src
         - ./tests
+    ignoreErrors:
+        - '/Call to an undefined method/'
+        - '/Access to an undefined property/'
+        - '/Access to undefined constant/'

psalm.xml

@@ -14,4 +14,26 @@
         </ignoreFiles>
     </projectFiles>
 
+    <issueHandlers>
+        <PropertyNotSetInConstructor>
+            <errorLevel type="suppress">
+                <file name="src/ObjectProxy.php" />
+            </errorLevel>
+        </PropertyNotSetInConstructor>
+        <RedundantPropertyInitializationCheck>
+            <errorLevel type="suppress">
+                <file name="src/ObjectProxy.php" />
+            </errorLevel>
+        </RedundantPropertyInitializationCheck>
+        <MissingClosureReturnType>
+            <errorLevel type="suppress">
+                <file name="src/ObjectProxy.php" />
+            </errorLevel>
+        </MissingClosureReturnType>
+        <MissingClosureParamType>
+            <errorLevel type="suppress">
+                <file name="src/ObjectProxy.php" />
+            </errorLevel>
+        </MissingClosureParamType>
+    </issueHandlers>
 </psalm>

src/Example.php

@@ -1,37 +0,0 @@
-<?php
-
-/**
- * This file is part of danjones000/object-spy
- *
- * danjones000/object-spy is open source software: you can distribute
- * it and/or modify it under the terms of the MIT License
- * (the "License"). You may not use this file except in
- * compliance with the License.
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * permissions and limitations under the License.
- *
- * @copyright Copyright (c) Dan Jones <danjones@goodevilgenius.org>
- * @license https://opensource.org/licenses/MIT MIT License
- */
-
-declare(strict_types=1);
-
-namespace Danjones000\Spy;
-
-/**
- * An example class to act as a starting point for developing your library
- */
-class Example
-{
-    /**
-     * Returns a greeting statement using the provided name
-     */
-    public function greet(string $name = 'World'): string
-    {
-        return "Hello, {$name}!";
-    }
-}

src/ObjectProxy.php

@@ -0,0 +1,157 @@
+<?php
+
+/**
+ * This file is part of danjones000/object-spy
+ *
+ * danjones000/object-spy is open source software: you can distribute
+ * it and/or modify it under the terms of the MIT License
+ * (the "License"). You may not use this file except in
+ * compliance with the License.
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+ * implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ *
+ * @copyright Copyright (c) Dan Jones <danjones@goodevilgenius.org>
+ * @license https://opensource.org/licenses/MIT MIT License
+ */
+
+declare(strict_types=1);
+
+namespace Danjones000\Spy;
+
+use Closure;
+use InvalidArgumentException;
+
+use function class_exists;
+use function get_class;
+use function is_null;
+use function is_object;
+use function is_string;
+
+/**
+ * Proxies all calls to another object/class, via Closures.
+ *
+ * This allows access to private/protected methods and properties without Reflection.
+ */
+class ObjectProxy
+{
+    protected ?string $class;
+    protected ?object $object;
+    protected Closure $caller;
+    protected Closure $getter;
+    protected Closure $setter;
+
+    /**
+     * @param string|object $classOrObject
+     *
+     * @psalm-suppress RedundantConditionGivenDocblockType
+     */
+    public function __construct($classOrObject)
+    {
+        [$this->object, $this->class] = is_object($classOrObject) ?
+                          [$classOrObject, get_class($classOrObject)] :
+                          (
+                              is_string($classOrObject) && class_exists($classOrObject) ?
+                              [null, $classOrObject] :
+                              [null, null]
+                          );
+        $this->assertValid();
+    }
+
+    protected function assertValid(): void
+    {
+        if (is_null($this->class)) {
+            throw new InvalidArgumentException('Must specify a class, or object');
+        }
+
+        if (!class_exists($this->class)) {
+            throw new InvalidArgumentException('Must specify a valid class');
+        }
+    }
+
+    /**
+     * Get the closure used by $this->__call.
+     *
+     * @psalm-suppress PossiblyNullArgument
+     */
+    protected function getCaller(): Closure
+    {
+        return $this->caller ??= (
+            $this->object ?
+            fn (string $method, array $args) => $this->$method(...$args) :
+            static fn (string $method, array $args) => static::$method(...$args)
+        )->bindTo($this->object, $this->class);
+    }
+
+    /**
+     * Get the closure used by $this->__get.
+     *
+     * @psalm-suppress PossiblyNullArgument
+     * @psalm-suppress UnusedClosureParam
+     */
+    protected function getGetter(): Closure
+    {
+        return $this->getter ??= (
+            $this->object ?
+            fn (string $key) => $this->$key :
+            static fn (string $key) => static::$$key
+        )->bindTo($this->object, $this->class);
+    }
+
+    /**
+     * Get the closure used by $this->__set.
+     *
+     * @psalm-suppress PossiblyNullArgument
+     * @psalm-suppress MixedAssignment
+     */
+    protected function getSetter(): Closure
+    {
+        return $this->setter ??= (
+            $this->object ?
+            fn (string $key, $value) => $this->$key = $value :
+            static fn (string $key, $value) => static::$$key = $value
+        )->bindTo($this->object, $this->class);
+    }
+
+    /**
+     * Run arbitry code on object, with access to private/protected props/methods.
+     *
+     * @param mixed[] $args
+     * @return mixed
+     * @psalm-suppress PossiblyNullArgument
+     * @psalm-suppress PossiblyInvalidFunctionCall
+     */
+    public function call(callable $cb, array ...$args)
+    {
+        return (Closure::fromCallable($cb)->bindTo($this->object, $this->class))(...$args);
+    }
+
+    /**
+     * @param mixed[] $args
+     * @return mixed
+     */
+    public function __call(string $method, array $args)
+    {
+        return ($this->getCaller())($method, $args);
+    }
+
+    /**
+     * @return mixed
+     */
+    public function __get(string $key)
+    {
+        return ($this->getGetter())($key);
+    }
+
+    /**
+     * @param mixed $value
+     * @return mixed
+     */
+    public function __set(string $key, $value)
+    {
+        return ($this->getSetter())($key, $value);
+    }
+}

tests/ExampleTest.php

@@ -1,20 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace Danjones000\Test\Spy;
-
-use Danjones000\Spy\Example;
-use Mockery\MockInterface;
-
-class ExampleTest extends TestCase
-{
-    public function testGreet(): void
-    {
-        /** @var Example & MockInterface $example */
-        $example = $this->mockery(Example::class);
-        $example->shouldReceive('greet')->passthru();
-
-        $this->assertSame('Hello, Friends!', $example->greet('Friends'));
-    }
-}

tests/Fixtures/Example.php

@@ -0,0 +1,41 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Danjones000\Test\Spy\Fixtures;
+
+class Example
+{
+    protected const PROT_CONST = 2;
+    private const PRIV_CONST = 3;
+    protected static int $protStatic = 4;
+    private static int $privStatic = 5;
+    protected int $prot = 6;
+    private int $priv = 7;
+
+    public static function reset(): void
+    {
+        static::$protStatic = 4;
+        static::$privStatic = 5;
+    }
+
+    protected function protMethod(): int
+    {
+        return $this->prot;
+    }
+
+    private function privMethod(int $priv): void
+    {
+        $this->priv = $priv;
+    }
+
+    protected static function protStatMethod(int $protStatic): void
+    {
+        static::$protStatic = $protStatic;
+    }
+
+    private static function privStatMethod(): int
+    {
+        return static::$privStatic;
+    }
+}

tests/ObjectProxyTest.php

@@ -0,0 +1,129 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Danjones000\Test\Spy;
+
+use Danjones000\Spy\ObjectProxy;
+use Mockery;
+use Mockery\MockInterface;
+
+class ObjectProxyTest extends TestCase
+{
+    protected Fixtures\Example $example;
+    protected ObjectProxy $spy;
+    protected ObjectProxy $classSpy;
+    protected \ReflectionObject $reflection;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        Fixtures\Example::reset();
+        $this->example = new Fixtures\Example();
+        $this->spy = new ObjectProxy($this->example);
+        $this->classSpy = new ObjectProxy(Fixtures\Example::class);
+        $this->reflection = new \ReflectionObject($this->example);
+    }
+
+    public function testCallingProtectedMethod(): void
+    {
+        $ret = $this->spy->protMethod();
+        $this->assertEquals(6, $ret);
+    }
+
+    public function testCallPrivateMethod(): void
+    {
+        $this->spy->privMethod(42);
+        $prop = $this->reflection->getProperty('priv');
+        $prop->setAccessible(true);
+
+        $this->assertEquals(42, $prop->getValue($this->example));
+    }
+
+    public function testCallProtectedStaticMethod(): void
+    {
+        $this->classSpy->protStatMethod(42);
+        $prop = $this->reflection->getProperty('protStatic');
+        $prop->setAccessible(true);
+
+        $this->assertEquals(42, $prop->getValue());
+    }
+
+    public function testCallPrivateStaticMethod(): void
+    {
+        $ret = $this->classSpy->privStatMethod();
+        $this->assertEquals(5, $ret);
+    }
+
+    public function testAccessPrivateProperty(): void
+    {
+        $this->assertEquals(7, $this->spy->priv);
+    }
+
+    public function testAccessProtectedProperty(): void
+    {
+        $this->assertEquals(6, $this->spy->prot);
+    }
+
+    public function testAccessPrivateStaticProperty(): void
+    {
+        $this->assertEquals(5, $this->classSpy->privStatic);
+    }
+
+    public function testAccessProtectedStaticProperty(): void
+    {
+        $this->assertEquals(4, $this->classSpy->protStatic);
+    }
+
+    public function testAccessPrivateConstantThroughCall(): void
+    {
+        $ret = $this->classSpy->call(fn () => static::PRIV_CONST);
+        $this->assertEquals(3, $ret);
+        $ret = $this->classSpy->call(fn () => self::PRIV_CONST);
+        $this->assertEquals(3, $ret);
+    }
+
+    public function testAccessProtectedConstantThroughCall(): void
+    {
+        $ret = $this->classSpy->call(fn () => static::PROT_CONST);
+        $this->assertEquals(2, $ret);
+        $ret = $this->classSpy->call(fn () => self::PROT_CONST);
+        $this->assertEquals(2, $ret);
+    }
+
+    public function testModifyPrivateProperty(): void
+    {
+        $this->spy->priv = 42;
+        $prop = $this->reflection->getProperty('priv');
+        $prop->setAccessible(true);
+
+        $this->assertEquals(42, $prop->getValue($this->example));
+    }
+
+    public function testModifyProtectedProperty(): void
+    {
+        $this->spy->prot = 42;
+        $prop = $this->reflection->getProperty('prot');
+        $prop->setAccessible(true);
+
+        $this->assertEquals(42, $prop->getValue($this->example));
+    }
+
+    public function testModifyPrivateStaticProperty(): void
+    {
+        $this->classSpy->privStatic = 42;
+        $prop = $this->reflection->getProperty('privStatic');
+        $prop->setAccessible(true);
+
+        $this->assertEquals(42, $prop->getValue());
+    }
+
+    public function testModifyProtectedStaticProperty(): void
+    {
+        $this->classSpy->protStatic = 42;
+        $prop = $this->reflection->getProperty('protStatic');
+        $prop->setAccessible(true);
+
+        $this->assertEquals(42, $prop->getValue());
+    }
+}