Bart\Configuration\TestConfig::isUnconfigured PHP Method

    public function isUnconfigured()
    {
        // This value won't exist, so it should default
        return $this->getBool('missing', 'missing', true);
    }

 public function testGetBoolDefaultTrue()
 {
     $configs = new TestConfig();
     $configs->configureForTesting([]);
     $this->assertTrue($configs->isUnconfigured(), 'isUnconfigured default value');
 }