use super::{classify_param_type, emit_param_conversion};
use crate::core::ir::TypeRef;

/// classify_param_type returns Plain for a bare Named type.
#[test]
fn classify_param_type_returns_plain_for_named() {
    let ty = TypeRef::Named("Foo".to_string());
    let result = classify_param_type(&ty);
    assert!(result.is_some());
    let (name, _) = result.unwrap();
    assert_eq!(name, "Foo");
}

/// classify_param_type returns None for a primitive type.
#[test]
fn classify_param_type_returns_none_for_primitive() {
    let ty = TypeRef::Primitive(crate::core::ir::PrimitiveType::Bool);
    assert!(classify_param_type(&ty).is_none());
}

/// emit_param_conversion emits a guarded None check when optional.
#[test]
fn emit_param_conversion_guards_optional() {
    let mut out = String::new();
    emit_param_conversion(&mut out, "_rust_x", "x", "convert(x)", true);
    assert!(out.contains("if x is not None else None"));
}

/// emit_param_conversion emits a direct assignment when not optional.
#[test]
fn emit_param_conversion_direct_when_required() {
    let mut out = String::new();
    emit_param_conversion(&mut out, "_rust_x", "x", "convert(x)", false);
    assert!(!out.contains("if x is not None"));
    assert!(out.contains("_rust_x = convert(x)"));
}
