bashrs 6.66.0

Rust-to-Shell transpiler for deterministic bootstrap scripts
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use super::*;

#[test]
fn test_convert_stmt_simple_let_binding() {
    let source = r#"
        fn main() {
            let x = 42;
        }
    "#;
    let ast = parse(source).unwrap();
    assert_eq!(ast.functions.len(), 1);
    assert_eq!(ast.functions[0].body.len(), 1);

    match &ast.functions[0].body[0] {
        Stmt::Let { name, value, .. } => {
            assert_eq!(name, "x");
            assert!(matches!(value, Expr::Literal(Literal::U32(42))));
        }
        _ => panic!("Expected Let statement"),
    }
}

#[test]
fn test_convert_stmt_string_let_binding() {
    let source = r#"
        fn main() {
            let greeting = "Hello, world!";
        }
    "#;
    let ast = parse(source).unwrap();

    match &ast.functions[0].body[0] {
        Stmt::Let { name, value, .. } => {
            assert_eq!(name, "greeting");
            assert!(matches!(value, Expr::Literal(Literal::Str(_))));
        }
        _ => panic!("Expected Let statement"),
    }
}

#[test]
fn test_convert_stmt_let_without_init() {
    let source = r#"
        fn main() {
            let x;
        }
    "#;
    let result = parse(source);
    assert!(result.is_err());
    assert!(result
        .unwrap_err()
        .to_string()
        .contains("must have initializers"));
}

#[test]
fn test_convert_stmt_simple_if() {
    let source = r#"
        fn main() {
            if true {
                let x = 1;
            }
        }
    "#;
    let ast = parse(source).unwrap();

    match &ast.functions[0].body[0] {
        Stmt::If {
            condition,
            then_block,
            else_block,
        } => {
            assert!(matches!(condition, Expr::Literal(Literal::Bool(true))));
            assert_eq!(then_block.len(), 1);
            assert!(else_block.is_none());
        }
        _ => panic!("Expected If statement"),
    }
}

#[test]
fn test_convert_stmt_if_else() {
    let source = r#"
        fn main() {
            if true {
                let x = 1;
            } else {
                let y = 2;
            }
        }
    "#;
    let ast = parse(source).unwrap();

    match &ast.functions[0].body[0] {
        Stmt::If {
            condition,
            then_block,
            else_block,
        } => {
            assert!(matches!(condition, Expr::Literal(Literal::Bool(true))));
            assert_eq!(then_block.len(), 1);
            assert!(else_block.is_some());
            assert_eq!(else_block.as_ref().unwrap().len(), 1);
        }
        _ => panic!("Expected If statement"),
    }
}

#[test]
fn test_convert_stmt_else_if_chain_two_levels() {
    let source = r#"
        fn main() {
            if true {
                let x = 1;
            } else if false {
                let y = 2;
            }
        }
    "#;
    let ast = parse(source).unwrap();

    match &ast.functions[0].body[0] {
        Stmt::If {
            condition,
            then_block,
            else_block,
        } => {
            assert!(matches!(condition, Expr::Literal(Literal::Bool(true))));
            assert_eq!(then_block.len(), 1);

            // Verify else block contains nested if
            assert!(else_block.is_some());
            let else_stmts = else_block.as_ref().unwrap();
            assert_eq!(else_stmts.len(), 1);

            match &else_stmts[0] {
                Stmt::If {
                    condition: nested_cond,
                    then_block: nested_then,
                    else_block: nested_else,
                } => {
                    assert!(matches!(nested_cond, Expr::Literal(Literal::Bool(false))));
                    assert_eq!(nested_then.len(), 1);
                    assert!(nested_else.is_none());
                }
                _ => panic!("Expected nested If statement in else block"),
            }
        }
        _ => panic!("Expected If statement"),
    }
}

#[test]
fn test_convert_stmt_else_if_chain_three_levels() {
    let source = r#"
        fn main() {
            if true {
                let x = 1;
            } else if false {
                let y = 2;
            } else if true {
                let z = 3;
            }
        }
    "#;
    let ast = parse(source).unwrap();

    // Verify first level if
    let first_else = extract_if_else_block(&ast.functions[0].body[0]);
    assert_eq!(first_else.len(), 1);

    // Verify second level else-if
    let second_else = extract_if_else_block(&first_else[0]);
    assert_eq!(second_else.len(), 1);

    // Verify third level else-if
    match &second_else[0] {
        Stmt::If {
            condition,
            else_block: third_else,
            ..
        } => {
            assert!(matches!(condition, Expr::Literal(Literal::Bool(true))));
            assert!(third_else.is_none());
        }
        _ => panic!("Expected third-level If statement"),
    }
}

/// Helper: extract the else block from an If statement, panicking if not found
fn extract_if_else_block(stmt: &Stmt) -> &Vec<Stmt> {
    match stmt {
        Stmt::If { else_block, .. } => {
            assert!(else_block.is_some(), "Expected else block");
            else_block.as_ref().unwrap()
        }
        _ => panic!("Expected If statement"),
    }
}

include!("parser_tests_extracted_convert.rs");