rustyroad 1.8.0

Rusty Road is a framework written in Rust that is based on Ruby on Rails. It is designed to provide the familiar conventions and ease of use of Ruby on Rails, while also taking advantage of the performance and efficiency of Rust.
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//! Planning add, drop, and raw SQL operations.

use crate::database::versions::ops::model::Migration;
use crate::database::versions::ops::plan;

#[test]
fn add_column_defers_not_null_until_backfilled() {
    let migration: Migration = serde_json::from_str(
        r#"{"operations":[{"add_column":{"table":"users","column":"status",
            "type":"text","nullable":false,"up":"'active'"}}]}"#,
    )
    .expect("should parse");

    let plan = plan(&migration, "public_v");

    // Applying NOT NULL before the backfill would fail on existing rows.
    assert!(!plan.statements.join("\n").contains("SET NOT NULL"));
    assert!(plan
        .completion_statements()
        .join("\n")
        .contains(r#"ALTER COLUMN "status" SET NOT NULL"#));
}

#[test]
fn raw_sql_passes_through_untouched() {
    let migration: Migration = serde_json::from_str(
        r#"{"operations":[{"sql":{"up":"CREATE INDEX idx ON users (status)"}}]}"#,
    )
    .expect("should parse");

    let plan = plan(&migration, "public_v");

    assert_eq!(plan.statements, vec!["CREATE INDEX idx ON users (status)"]);
    // No shadow, no trigger, no backfill.
    assert!(plan.backfill_tables.is_empty());
    assert!(plan.promotions.is_empty());
}

#[test]
fn multiple_operations_merge_into_one_plan() {
    let migration: Migration = serde_json::from_str(
        r#"{"operations":[
            {"add_column":{"table":"users","column":"a","type":"text","up":"'x'"}},
            {"add_column":{"table":"orders","column":"b","type":"text","up":"'y'"}}]}"#,
    )
    .expect("should parse");

    let plan = plan(&migration, "public_v");

    // Each table is backfilled once, in stable order.
    assert_eq!(plan.backfill_tables, vec!["orders", "users"]);
}