Function assert_create_new_block_fails

test/functional/test_framework/ipc_util.py:167–173

Assert that mining.createNewBlock fails with the expected remote exception.

(ctx, mining, opts, expected_msg)

async def assert_create_new_block_fails(ctx, mining, opts, expected_msg):
    """Assert that mining.createNewBlock fails with the expected remote exception."""
    try:
        await mining.createNewBlock(ctx, opts)
        raise AssertionError("createNewBlock unexpectedly succeeded")
    except capnp.lib.capnp.KjException as e:
        assert_capnp_failed(e, f"remote exception: std::exception: {expected_msg}")