//! > Test expansion of a component without storage.

//! > test_runner_name
ExpandContractTestRunner(expect_diagnostics: true)

//! > cairo_code
#[starknet::component]
mod test_component {}

//! > generated_cairo_code
lib.cairo:

#[starknet::component]
mod test_component {}

//! > expected_diagnostics
error: Plugin diagnostic: Components must define a 'Storage' struct.
 --> lib.cairo:1:1
#[starknet::component]
^********************^
