def METHOD_NAME():
    client.load('get_variables')
    resp = client.get(url='/?var1=val1&var2=&var3')
    assert resp['headers']['X-Var-1'] == 'val1', 'GET variables'
    assert resp['headers']['X-Var-2'] == '', 'GET variables 2'
    assert resp['headers']['X-Var-3'] == '', 'GET variables 3'