implement tests for site specific config

test that site directory config files are read correctly
correct Settings.php to pass tests

tests/SettingsTest.php

@@ -35,7 +35,7 @@ class SettingsTest extends TestCase
 	
 	public function testLoad()
 	{
-		$cfg = $this->load('cfg');
+		$cfg = $this->init('cfg')->load();
 		$this->assertNotEmpty($cfg);
 		return $cfg;
 	}
@@ -48,15 +48,24 @@ class SettingsTest extends TestCase
 		$this->assertEquals('test', $cfg->mode);
 	}
 	
+	/**
+	 */
+	public function testSiteOverride()
+	{
+		$cfg = $this->init('cfg')->site('site')->load();
+		$this->assertEquals(42, $cfg->answer);
+	}
+	
+	
 	public function testTestingOverride()
 	{
-		$cfg = $this->load('cfg/testingOverride');
+		$cfg = $this->init('cfg/testingOverride')->load();
 		$this->assertEquals(42, $cfg->answer);
 	}
 	
 	public function testLocalOverride()
 	{
-		$cfg = $this->load('cfg/localOverride');
+		$cfg = $this->init('cfg/localOverride')->load();
 		$this->assertEquals(42, $cfg->answer);
 	}
 	
@@ -73,7 +82,7 @@ class SettingsTest extends TestCase
 		$this->assertEquals($defaultName, $cfg->buildFileName());
 	}
 	
-	private function load(string $dir)
+	private function init(string $dir)
 	{
 		return (new Settings())->appPath(dirname(__FILE__)."/$dir/")->load();
 	}

tests/cfg/config/default.conf.php

@@ -1,3 +1,4 @@
 <?php return [
-	'mode' => 'test'
+	'mode' => 'test',
+	'answer' => false
 ];

tests/cfg/config/site/conf.php

@@ -0,0 +1,3 @@
+<?php return [
+	'answer' => 42
+];