DataSift\Storyplayer\TestEnvironmentsLib\TestEnvironmentConfig::validateConfig PHP Method

    public function validateConfig()
    {
        // do we have any config?
        $config = $this->getConfig();
        // backwards-compatibility with 2.0.0-pre releases
        if (isset($config->{'0'})) {
            // convert to an object
            //
            // this is the documented format
            //
            // 2.0.0-pre had this file as an array of groups. we don't
            // want to break that for DataSift, who are actively using
            // it
            $tmp = new BaseObject();
            $tmp->groups = $config;
            $config = $tmp;
            $this->setData('', $config);
        }
        // do we have any defined groups?
        if (!isset($config->groups)) {
            throw new E4xx_TestEnvironmentNeedsGroups();
        }
        foreach ($config->groups as $index => $group) {
            // what type of machines does this group define?
            if (!isset($group->type)) {
                throw new E4xx_TestEnvironmentGroupNeedsAType($index);
            }
            // is this a valid type?
            $this->validateGroupType($index, $group->type);
            // do we have any machines defined?
            if (!isset($group->details, $group->details->machines)) {
                throw new E4xx_TestEnvironmentGroupNeedsMachines($index);
            }
            // are the machines valid?
            foreach ($group->details->machines as $hostId => $machine) {
                // does each machine have a role?
                if (!isset($machine->roles)) {
                    throw new E4xx_TestEnvironmentMachineNeedsARole($index, $hostId);
                }
                // is the roles an array?
                if (!is_array($machine->roles)) {
                    throw new E4xx_TestEnvironmentMachineRolesMustBeArray($index, $hostId, gettype($machine->roles));
                }
            }
        }
    }