You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: complex.rs
    path of file: ./repos/surrealdb/lib/tests
    
    the code of the file until where you have to start completion: #![cfg(not(target_arch = "wasm32"))]

mod parse;
use parse::Parse;
mod helpers;
use helpers::new_ds;
use helpers::with_enough_stack;
use surrealdb::dbs::Session;
use surrealdb::err::Error;
use surrealdb::sql::Value;

#[test]
fn self_referential_field() -> Result<(), Error> {
	// Ensure a good stack size for tests
	with_enough_stack(async {
		let mut res = run_queries(
			"
			CREATE pet:dog SET tail = <future> { tail };
			",
		)
		.aw
    
fn ok_graph_traversal_depth() -> Result<(), Error> {
	// Build the SQL traversal query
	fn graph_traversal(n: usize) -> String {
		let mut ret = String::from("CREATE node:0;\n");
		for i in 1..=n {
			let prev = i - 1;
			ret.push_str(&format!("CREATE node:{i};\n"));
			ret.push_str(&format!("RELATE node:{prev}->edge{i}->node:{i};\n"));
		}
		ret.push_str("SELECT ");
		for i in 1..=n {
			ret.push_str(&format!("->edge{i}->node"));
		}
		ret.push_str(" AS res FROM node:0;\n");
		ret
	}
	// Test different traversal depths
	for n in 1..=40 {
		// Ensure a good stack size for tests
		with_enough_stack(async move {
			// Run the graph traversal queries
			let mut res = run_queries(&graph_traversal(n)).await?;
			// Remove the last result
			let tmp = res.next_back().unwrap();
			// Check all other queries
			assert!(res.all(|r| r.is_ok()));
			//
			match tmp {
				Ok(res) => {
					let val = Value::parse(&format!(
						"[
							{{
								res: [node:{n}],
							}}
						]"
					));
					assert_eq!(res, val);
				}
				Err(res) => {
					assert!(matches!(res, Error::ComputationDepthExceeded));
					assert!(n > 10, "Max traversals: {}", n - 1);
				}
			}

			Ok(())
		})
		.unwrap();
	}

	Ok(())
}