Let ConfigTrait::processConfig() accept an arbitrarily nested key.. R…

…esolves #14

CHANGELOG.md

@@ -2,6 +2,10 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## [0.1.8] - 2016-02-11
+### Added
+- The `ConfigTrait::processConfig()` method now accepts one or more additional parameters (can be delimited strings) to start with a Config at a specific level. Useful to include different `vendor\package` levels in a single merged Config file.
+
 ## [0.1.7] - 2016-02-11
 ### Fixed
 - The `hasKey()` method doesn't throw an exception, returns `false` instead.
@@ -50,6 +54,7 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 ### Added
 - Initial release to GitHub.
 
+[0.1.8]: https://github.com/brightnucleus/config/compare/v0.1.7...v0.1.8
 [0.1.7]: https://github.com/brightnucleus/config/compare/v0.1.6...v0.1.7
 [0.1.6]: https://github.com/brightnucleus/config/compare/v0.1.5...v0.1.6
 [0.1.5]: https://github.com/brightnucleus/config/compare/v0.1.4...v0.1.5

src/ConfigTrait.php

@@ -11,6 +11,8 @@
 
 namespace BrightNucleus\Config;
 
+use Exception;
+use RuntimeException;
 use BrightNucleus\Config\ConfigInterface;
 
 trait ConfigTrait
@@ -31,9 +33,23 @@ trait ConfigTrait
      * @since 0.1.2
      *
      * @param ConfigInterface $config The Config to process.
+     * @param                 string  ... List of keys.
+     * @throws RuntimeException If the arguments could not be parsed into a Config.
      */
     protected function processConfig(ConfigInterface $config)
     {
+        if (func_num_args() > 1) {
+            try {
+                $keys = func_get_args();
+                array_shift($keys);
+                $config = new Config($config->getKey($keys));
+            } catch (Exception $exception) {
+                throw new RuntimeException(sprintf(
+                    _('Could not process the config with the arguments "%1$s".'),
+                    print_r(func_get_args(), true)
+                ));
+            }
+        }
         $this->config = $config;
     }
 
@@ -52,7 +68,7 @@ protected function hasConfigKey()
     {
         $keys = func_get_args();
 
-        return call_user_func_array([$this->config, 'hasKey'], $keys);
+        return $this->config->hasKey($keys);
     }
 
     /**
@@ -70,7 +86,7 @@ protected function getConfigKey()
     {
         $keys = func_get_args();
 
-        return call_user_func_array([$this->config, 'getKey'], $keys);
+        return $this->config->getKey($keys);
     }
 
     /**

tests/ConfigTraitTest.php

@@ -133,4 +133,35 @@ public function testGetConfigKeys()
         ]));
         $this->assertEquals(['testkey1', 'testkey2'], $this->getConfigKeys());
     }
+
+    /**
+     * @covers \BrightNucleus\Config\ConfigTrait::processConfig
+     */
+    public function testProcessConfigAllowsPreKeying()
+    {
+        $this->processConfig(new Config([
+            'vendor' => [
+                'package' => [
+                    'testkey1' => 'testvalue1',
+                    'testkey2' => 'testvalue2',
+                ],
+            ],
+        ]), 'vendor\package');
+        $this->assertEquals(
+            ['testkey1' => 'testvalue1', 'testkey2' => 'testvalue2'],
+            $this->getConfigArray()
+        );
+    }
+
+    /**
+     * @covers \BrightNucleus\Config\ConfigTrait::processConfig
+     */
+    public function testProcessConfigThrowsException()
+    {
+        $this->setExpectedException('RuntimeException', 'Could not process the config with the arguments');
+        $this->processConfig(new Config([
+            'testkey1' => 'testvalue1',
+            'testkey2' => 'testvalue2',
+        ]), 'vendor\package');
+    }
 }