public function testConditionalGlobalVar($foo, $expectedValue)
{
putenv('Foo=' . $foo);
$config = new \StackFormation\Config([FIXTURE_ROOT . 'Config/blueprint.conditional_vars.yml']);
$blueprint = $this->getMockedBlueprintFactory($config)->getBlueprint('fixture_var_conditional_global');
$parameters = $blueprint->getParameters(true);
$parameters = Div::flatten($parameters, 'ParameterKey', 'ParameterValue');
$this->assertEquals($expectedValue, $parameters['Parameter1']);
}