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: mod.rs
    path of file: ./repos/prisma-engines/schema-engine/sql-introspection-tests/tests/named_constraints
    
    the code of the file until where you have to start completion: mod mssql;
mod mysql;
mod sqlite;

use barrel::types;
use enumflags2::BitFlags;
use expect_test::expect;
use quaint::prelude::Queryable;
use sql_introspection_tests::test_api::*;
use test_macros::test_connector;

#[test_connector(tags(Mssql, Postgres), exclude(CockroachDb))]
async fn introspecting_non_default_pkey_names_works(api: &mut TestApi) -> TestResult {
    api.barrel()
        .execute(|migration| {
            migration.create_table("Single", move |t| {
                t.add_column("id", types::integer().increments(true).nullable(false));
                t.add_constraint("SomethingCustom", types::primary_constraint(["id"]));
            });

            migration.create_table("Compound", move |t| {
                t.add_column("a", types::integer().increments(false).nullable(false));
                t.add_column("b", types::integer().increments(false).nullable(false));
                t.add_constraint("SomethingCustomCompound", types::primary_constraint(["a", "b"]));
            });
        })
  
    
async fn introspecting_non_default_pkey_names_works(api: &mut TestApi) -> TestResult {
    api.barrel()
        .execute(|migration| {
            migration.create_table("Single", move |t| {
                t.add_column("id", types::integer().increments(true).nullable(false));
                t.add_constraint("SomethingCustom", types::primary_constraint(["id"]));
            });

            migration.create_table("Compound", move |t| {
                t.add_column("a", types::integer().increments(false).nullable(false));
                t.add_column("b", types::integer().increments(false).nullable(false));
                t.add_constraint("SomethingCustomCompound", types::primary_constraint(["a", "b"]));
            });
        })
        .await?;

    let expected = expect![[r#"
        model Compound {
          a Int
          b Int

          @@id([a, b], map: "SomethingCustomCompound")
        }

        model Single {
          id Int @id(map: "SomethingCustom") @default(autoincrement())
        }
    "#]];

    expected.assert_eq(&api.introspect_dml().await?);

    Ok(())
}