Tests typical entry points in Magento against why Snowdog_Freshmail module menu may not be showed

_freshmail_test.php

<?php

// enable error reporting to see all useful warnings
error_reporting(E_ALL);
ini_set('display_errors', 1);
if (function_exists('libxml_disable_entity_loader')) {
    libxml_disable_entity_loader(false);
}

header('Content-type: text/plain');

$xmlFiles = array(
    'app/etc/modules/Snowdog_Freshmail.xml',
    'app/code/community/Snowdog/Freshmail/etc/adminhtml.xml',
    'app/code/community/Snowdog/Freshmail/etc/config.xml',
    'app/code/community/Snowdog/Freshmail/etc/system.xml',
    'app/code/community/Snowdog/Freshmail/etc/widget.xml',
);
echo 'Testing files from ' . __DIR__ . PHP_EOL;
foreach ($xmlFiles as $xmlFile) {
    echo 'Testing existance of ' . $xmlFile . PHP_EOL;
    if (file_exists($xmlFile)) {
        echo "\t" . 'Found ' . realpath($xmlFile) . PHP_EOL;
        echo "\t\t" . 'Contains # lines ' . count(file($xmlFile)) . PHP_EOL;
        $xml = simplexml_load_file($xmlFile);
        if ($xml) {
            echo "\t\t" . 'Contains proper XML object' . PHP_EOL;
        }
    } else {
        echo "\t" . '!! Not found' . PHP_EOL;
    }
}

echo PHP_EOL . PHP_EOL;

require __DIR__ . '/app/Mage.php';
Mage::app('admin', 'store');

$coreHelper = Mage::helper('core');
$enabled = $coreHelper->isModuleEnabled('Snowdog_Freshmail');

echo 'Module enabled ' . ($enabled ? 'Yes' : 'No') . PHP_EOL;

$menuXml = Mage::getModel('admin/config')->getAdminhtmlConfig()->getNode('menu');
$node = $menuXml->xpath('//snowfreshmail');

if (count($node)) {
    echo 'Menu nodes exists in config' . PHP_EOL;
} else {
    echo '!! Did not found menu nodes' . PHP_EOL;
}

echo 'Attempt to instantiate helper class' . PHP_EOL;
$helper = new Snowdog_Freshmail_Helper_Data();
if ($helper) {
    echo 'Direct class instantiation successful' . PHP_EOL;
} else {
    echo '!! Cannot instantiate helper directly' . PHP_EOL;
}

class Mage_Snowfreshmail_Helper_Data extends Mage_Core_Helper_Abstract
{
}

;

$helper = Mage::helper('snowfreshmail');
if ($helper instanceof Snowdog_Freshmail_Helper_Data) {
    echo 'Factory class instantiation successful' . PHP_EOL;
} else {
    echo '!! Cannot instantiate helper via factory' . PHP_EOL;
}

$outputEnabled = Mage::helper('snowfreshmail')->isModuleOutputEnabled();
echo 'Module output enabled ' . ($outputEnabled ? 'Yes' : 'No') . PHP_EOL;

echo PHP_EOL . PHP_EOL;

Mage::reset();
echo 'Retry without cache' . PHP_EOL;
Mage::app('admin', 'store', array('global_ban_use_cache' => true));
Mage::getConfig()->getCache()->setOption('caching', false);

$coreHelper = Mage::helper('core');
$enabled = $coreHelper->isModuleEnabled('Snowdog_Freshmail');
$outputEnabled = Mage::helper('snowfreshmail')->isModuleOutputEnabled();

echo 'Module enabled ' . ($enabled ? 'Yes' : 'No') . PHP_EOL;
echo 'Module output enabled ' . ($outputEnabled ? 'Yes' : 'No') . PHP_EOL;

$menuXml = Mage::getModel('admin/config')->getAdminhtmlConfig()->getNode('menu');
$node = $menuXml->xpath('//snowfreshmail');

if (count($node)) {
    echo 'Menu nodes exists in config' . PHP_EOL;
} else {
    echo '!! Did not found menu nodes' . PHP_EOL;
}

$compilerConfig = __DIR__ . '/includes/config.php';
if (file_exists($compilerConfig)) {
    include $compilerConfig;
}

if (defined('COMPILER_INCLUDE_PATH') || define('COMPILER_COLLECT_PATH')) {
    echo '!! Warning compiler enabled';
}