Add Extends (#4)

* Add Extends

* Hydrate using protected and privates

Author: MrEssex

src/Context.php

@@ -63,6 +63,22 @@ public static function create(string $projectRoot = null, string $environment =
     return $ctx;
   }
 
+  public static function extends(Context $ctx)
+  {
+    $c = new static();
+    $c->_projectRoot = $ctx->_projectRoot;
+    $c->_env = $ctx->_env;
+    $c->_cfg = $ctx->_cfg;
+    $c->_meta = $ctx->_meta;
+    $c->_routeData = $ctx->_routeData;
+
+    $c->_id = $ctx->_id;
+    $c->_events = $ctx->_events;
+    $c->_request = $ctx->_request;
+    $c->_cookieJar = $ctx->_cookieJar;
+    return $c;
+  }
+
   protected function _generateId()
   {
     return uniqid('ctx-', true);

tests/ContextTest.php

@@ -138,4 +138,34 @@ public function testCannotSetContext()
     $this->expectExceptionMessage("You cannot set context on context");
     $ctx->setContext($ctx2);
   }
+
+  public function testExtendingContext()
+  {
+    $ctx = new Context();
+    $ctx->setEnvironment(Context::ENV_PROD);
+    $ctx->setProjectRoot('/abc');
+    $ctx2 = Context::extends($ctx);
+
+    $this->assertEquals($ctx->getEnvironment(), $ctx2->getEnvironment());
+    $this->assertEquals($ctx->getProjectRoot(), $ctx2->getProjectRoot());
+    $this->assertEquals($ctx->id(), $ctx2->id());
+
+    $ctx = Context::create('/abc', Context::ENV_QA);
+    $ctx->meta()->set('abc', 'def');
+    $ctx2 = Context::extends($ctx);
+
+    $this->assertEquals($ctx->getProjectRoot(), $ctx2->getProjectRoot());
+    $this->assertEquals('def', $ctx2->meta()->get('abc'));
+
+    $cnf = new ConfigProvider();
+    $ctx->setConfig($cnf);
+    $ctx->routeData()->set('123', '456');
+
+    $ctx2 = Context::extends($ctx);
+
+    $this->assertSame($cnf, $ctx2->getConfig());
+    $this->assertEquals('def', $ctx2->meta()->get('abc'));
+    $this->assertEquals('456', $ctx2->routeData()->get('123'));
+
+  }
 }