welds 0.4.23

An async ORM for (postgres, mssql, mysql, sqlite)
Documentation 
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use super::*;
use crate::Syntax;
use crate::detect::table_def::mock::MockTableDef;
use crate::migrations::MigrationWriter;

fn mock_table(syntax: Syntax) -> Table {
    Table::mock(
        MockTableDef::new(syntax, "s2.cars")
            .with_pk("id", "INT")
            .with_column("name", "TEXT"),
    )
}

fn mock_table2(syntax: Syntax) -> Table {
    Table::mock(
        MockTableDef::new(syntax, "s2.cars")
            .with_pk("id", "INT")
            .with_column("name", "VARCHAR"),
    )
}

#[test]
fn should_be_able_to_drop_a_table() {
    let table = mock_table(Syntax::Mysql);
    let m = table.drop();

    let expected = r#"DROP TABLE s2.cars"#;
    let sql = MigrationWriter::up_sql(&m, Syntax::Mysql).join("; ");
    assert_eq!(sql, expected.trim());

    let sql = MigrationWriter::up_sql(&m, Syntax::Postgres).join("; ");
    assert_eq!(sql, expected.trim());

    let sql = MigrationWriter::up_sql(&m, Syntax::Sqlite).join("; ");
    assert_eq!(sql, expected.trim());

    let sql = MigrationWriter::up_sql(&m, Syntax::Mssql).join("; ");
    assert_eq!(sql, expected.trim());
}

#[test]
fn down_should_recreate_the_table() {
    let table = mock_table(Syntax::Postgres);
    let m = table.drop();
    let expected = r#"
    CREATE TABLE s2.cars ( "id" SERIAL PRIMARY KEY NOT NULL, "name" TEXT NOT NULL )"#;
    let sql = MigrationWriter::down_sql(&m, Syntax::Postgres).join("; ");
    assert_eq!(sql, expected.trim());
}

#[test]
fn should_be_able_to_rename_column() {
    let table = mock_table(Syntax::Postgres);
    let m = table.change("name").rename("name2");
    // up sql
    let sql = MigrationWriter::up_sql(&m, Syntax::Postgres).join("; ");
    let expected_up = r#"ALTER TABLE s2.cars RENAME "name" TO "name2""#;
    assert_eq!(sql, expected_up);
    // down sql
    let sql = MigrationWriter::down_sql(&m, Syntax::Postgres).join("; ");
    let expected_down = r#"ALTER TABLE s2.cars RENAME "name2" TO "name""#;
    assert_eq!(sql, expected_down);
}

#[test]
fn should_be_able_to_rename_column2() {
    let table = mock_table(Syntax::Mssql);
    let m = table.change("name").rename("name2");
    // up sql
    let sql = MigrationWriter::up_sql(&m, Syntax::Mssql).join("; ");
    let expected_up = r#"EXEC sp_rename 's2.cars.name', 'name2', 'COLUMN'"#;
    assert_eq!(sql, expected_up);
    // down sql
    let sql = MigrationWriter::down_sql(&m, Syntax::Mssql).join("; ");
    let expected_down = r#"EXEC sp_rename 's2.cars.name2', 'name', 'COLUMN'"#;
    assert_eq!(sql, expected_down);
}

#[test]
fn should_be_able_to_drop_a_column() {
    let table = mock_table(Syntax::Mysql);
    let m = table.change("name").drop_column();
    // up sql
    let sql = MigrationWriter::up_sql(&m, Syntax::Mssql).join("; ");
    let expected_up = r#"ALTER TABLE s2.cars DROP COLUMN "name""#;
    assert_eq!(sql, expected_up);
}

#[test]
fn should_should_recreate_a_dropped_column() {
    let syntax = Syntax::Mysql;
    let table = mock_table2(syntax);
    let m = table.change("name").drop_column();
    //// down sql
    let sql = MigrationWriter::down_sql(&m, syntax).join("; ");
    let expected_down = r#"ALTER TABLE s2.cars ADD COLUMN name VARCHAR(255) NOT NULL"#;
    assert_eq!(sql, expected_down);
}