It helps if you return values from functions

Author: BPScott

src/Branding.php

@@ -132,7 +132,7 @@ public function getLanguage()
      */
     public function getLocale()
     {
-        $this->options['language'];
+        return $this->options['language'];
     }
 
     /**

tests/BrandingTest.php

@@ -33,6 +33,7 @@ public function testConstructor()
         $this->assertEquals($expectedOptions, $branding->getOptions());
         $this->assertEquals('en-GB', $branding->getOrbitLanguage());
         $this->assertEquals('en-GB', $branding->getLanguage());
+        $this->assertEquals('en_GB', $branding->getLocale());
         $this->assertEquals('default', $branding->getOrbitVariant());
         $this->assertEquals(null, $branding->getOrbitSearchScope());
         $this->assertEquals(