sqlx/tests/mssql/mssql.rs

use futures::TryStreamExt;
use sqlx::mssql::Mssql;
use sqlx::{Connection, Executor, Row};
use sqlx_core::mssql::MssqlRow;
use sqlx_test::new;

#[sqlx_macros::test]
async fn it_connects() -> anyhow::Result<()> {
    let mut conn = new::<Mssql>().await?;

    conn.ping().await?;

    conn.close().await?;

    Ok(())
}

#[sqlx_macros::test]
async fn it_can_select_expression() -> anyhow::Result<()> {
    let mut conn = new::<Mssql>().await?;

    let row: MssqlRow = conn.fetch_one("SELECT 4").await?;
    let v: i32 = row.try_get(0)?;

    assert_eq!(v, 4);

    Ok(())
}

#[sqlx_macros::test]
async fn it_maths() -> anyhow::Result<()> {
    let mut conn = new::<Mssql>().await?;

    let value = sqlx::query("SELECT 1 + @p1")
        .bind(5_i32)
        .try_map(|row: MssqlRow| row.try_get::<i32, _>(0))
        .fetch_one(&mut conn)
        .await?;

    assert_eq!(6_i32, value);

    Ok(())
}

#[sqlx_macros::test]
async fn it_executes() -> anyhow::Result<()> {
    let mut conn = new::<Mssql>().await?;

    let _ = conn
        .execute(
            r#"
CREATE TABLE #users (id INTEGER PRIMARY KEY);
            "#,
        )
        .await?;

    for index in 1..=10_i32 {
        let cnt = sqlx::query("INSERT INTO #users (id) VALUES (@p1)")
            .bind(index * 2)
            .execute(&mut conn)
            .await?;

        assert_eq!(cnt, 1);
    }

    let sum: i32 = sqlx::query("SELECT id FROM #users")
        .try_map(|row: MssqlRow| row.try_get::<i32, _>(0))
        .fetch(&mut conn)
        .try_fold(0_i32, |acc, x| async move { Ok(acc + x) })
        .await?;

    assert_eq!(sum, 110);

    Ok(())
}

#[sqlx_macros::test]
async fn it_selects_null() -> anyhow::Result<()> {
    let mut conn = new::<Mssql>().await?;

    let (_, val): (i32, Option<i32>) = sqlx::query_as("SELECT 5, NULL")
        .fetch_one(&mut conn)
        .await?;

    assert!(val.is_none());

    let val: Option<i32> = conn.fetch_one("SELECT 10, NULL").await?.try_get(1)?;

    assert!(val.is_none());

    Ok(())
}

#[sqlx_macros::test]
async fn it_binds_empty_string_and_null() -> anyhow::Result<()> {
    let mut conn = new::<Mssql>().await?;

    let (val, val2): (String, Option<String>) = sqlx::query_as("SELECT @p1, @p2")
        .bind("")
        .bind(None::<String>)
        .fetch_one(&mut conn)
        .await?;

    assert!(val.is_empty());
    assert!(val2.is_none());

    Ok(())
}

#[sqlx_macros::test]
async fn it_can_work_with_transactions() -> anyhow::Result<()> {
    let mut conn = new::<Mssql>().await?;

    conn.execute("IF OBJECT_ID('_sqlx_users_1922', 'U') IS NULL CREATE TABLE _sqlx_users_1922 (id INTEGER PRIMARY KEY)")
        .await?;

    conn.execute("DELETE FROM _sqlx_users_1922").await?;

    // begin .. rollback

    let mut tx = conn.begin().await?;

    sqlx::query("INSERT INTO _sqlx_users_1922 (id) VALUES ($1)")
        .bind(10_i32)
        .execute(&mut tx)
        .await?;

    tx.rollback().await?;

    let (count,): (i32,) = sqlx::query_as("SELECT COUNT(*) FROM _sqlx_users_1922")
        .fetch_one(&mut conn)
        .await?;

    assert_eq!(count, 0);

    // begin .. commit

    let mut tx = conn.begin().await?;

    sqlx::query("INSERT INTO _sqlx_users_1922 (id) VALUES (@p1)")
        .bind(10_i32)
        .execute(&mut tx)
        .await?;

    tx.commit().await?;

    let (count,): (i32,) = sqlx::query_as("SELECT COUNT(*) FROM _sqlx_users_1922")
        .fetch_one(&mut conn)
        .await?;

    assert_eq!(count, 1);

    // begin .. (drop)

    {
        let mut tx = conn.begin().await?;

        sqlx::query("INSERT INTO _sqlx_users_1922 (id) VALUES (@p1)")
            .bind(20_i32)
            .execute(&mut tx)
            .await?;
    }

    conn = new::<Mssql>().await?;

    let (count,): (i32,) = sqlx::query_as("SELECT COUNT(*) FROM _sqlx_users_1922")
        .fetch_one(&mut conn)
        .await?;

    assert_eq!(count, 1);

    Ok(())
}

#[sqlx_macros::test]
async fn it_can_work_with_nested_transactions() -> anyhow::Result<()> {
    let mut conn = new::<Mssql>().await?;

    conn.execute("IF OBJECT_ID('_sqlx_users_2523', 'U') IS NULL CREATE TABLE _sqlx_users_2523 (id INTEGER PRIMARY KEY)")
        .await?;

    conn.execute("DELETE FROM _sqlx_users_2523").await?;

    // begin
    let mut tx = conn.begin().await?;

    // insert a user
    sqlx::query("INSERT INTO _sqlx_users_2523 (id) VALUES (@p1)")
        .bind(50_i32)
        .execute(&mut tx)
        .await?;

    // begin once more
    let mut tx2 = tx.begin().await?;

    // insert another user
    sqlx::query("INSERT INTO _sqlx_users_2523 (id) VALUES (@p1)")
        .bind(10_i32)
        .execute(&mut tx2)
        .await?;

    // never mind, rollback
    tx2.rollback().await?;

    // did we really?
    let (count,): (i32,) = sqlx::query_as("SELECT COUNT(*) FROM _sqlx_users_2523")
        .fetch_one(&mut tx)
        .await?;

    assert_eq!(count, 1);

    // actually, commit
    tx.commit().await?;

    // did we really?
    let (count,): (i32,) = sqlx::query_as("SELECT COUNT(*) FROM _sqlx_users_2523")
        .fetch_one(&mut conn)
        .await?;

    assert_eq!(count, 1);

    Ok(())
}