__construct_runtime_integrity_test fails after upgrading to polkadot 0.9.38

Question

After upgrading our chain to polkadot version 0.9.38 and run SKIP_WASM_BUILD= cargo test --all I get the following test error

'__construct_runtime_integrity_test::runtime_integrity_tests' panicked at 
'Builder finished with `build_or_panic`; 
The panic is expected if runtime weights are not correct: 
ValidationErrors { has_errors: true, errors: [
    "[DispatchClass::Normal] Weight { ref_time: 375000000000, proof_size: 0 } (total) has to be greater than Weight { ref_time: 381015000, proof_size: 0 } (base block) & Weight { ref_time: 99840000, proof_size: 0 } (base extrinsic)",
    "[DispatchClass::Normal] Some(Weight { ref_time: 349900160000, proof_size: 0 }) (max_extrinsic) must not be 0. Check base cost and average initialization cost.",
    "[DispatchClass::Normal] Weight { ref_time: 500000000000, proof_size: 0 } (max block) must fit at least one extrinsic Weight { ref_time: 480855000, proof_size: 0 } (base weight)",
    "[DispatchClass::Operational] Weight { ref_time: 500000000000, proof_size: 0 } (total) has to be greater than Weight { ref_time: 381015000, proof_size: 0 } (base block) & Weight { ref_time: 99840000, proof_size: 0 } (base extrinsic)",
    "[DispatchClass::Operational] Some(Weight { ref_time: 474900160000, proof_size: 0 }) (max_extrinsic) must not be 0. Check base cost and average initialization cost.",
    "[DispatchClass::Operational] Weight { ref_time: 125000000000, proof_size: 0 } (reserved) has to be greater than Weight { ref_time: 99840000, proof_size: 0 } (base extrinsic) if set",
    "[DispatchClass::Operational] Weight { ref_time: 500000000000, proof_size: 0 } (max block) must fit at least one extrinsic Weight { ref_time: 480855000, proof_size: 0 } (base weight)",
    "[DispatchClass::Mandatory] Weight { ref_time: 500000000000, proof_size: 0 } (max block) must fit at least one extrinsic Weight { ref_time: 480855000, proof_size: 0 } (base weight)"
]}

I was running the tests for each pallet separately and they seems to pass as expected. Any guidance on how to resolve it

Link to code here

Answer 1

You need to change your declaration of MAXIMUM_BLOCK_WEIGHT to:

pub const MAXIMUM_BLOCK_WEIGHT: Weight = Weight::from_parts(
    WEIGHT_REF_TIME_PER_SECOND.saturating_div(2),
    polkadot_primitives::MAX_POV_SIZE as u64,
);

In your code base you don't set the pov size and this will make the initialization of RuntimeBlockWeights fail.