You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: mod.rs
    path of file: ./repos/boa/tests/tester/src/exec
    
    the code of the file until where you have to start completion: //! Execution module for the test runner.

mod js262;

use crate::{
    read::ErrorType, Harness, Outcome, Phase, SpecEdition, Statistics, SuiteResult, Test,
    TestFlags, TestOutcomeResult, TestResult, TestSuite, VersionedStats,
};
use boa_engine::{
    builtins::promise::PromiseState,
    js_string,
    module::{Module, SimpleModuleLoader},
    native_function::NativeFunction,
    object::FunctionObjectBuilder,
    optimizer::OptimizerOptions,
    property::Attribute,
    script::Script,
    Context, JsArgs, JsError, JsNativeErrorKind, JsValue, Source,
};
use colored::Colorize;
use rayon::prelude::*;
use rustc_hash::Fx
    
fn is_error_type(error: &JsError, target_type: ErrorType, context: &mut Context) -> bool {
    if let Ok(error) = error.try_native(context) {
        match &error.kind {
            JsNativeErrorKind::Syntax if target_type == ErrorType::SyntaxError => {}
            JsNativeErrorKind::Reference if target_type == ErrorType::ReferenceError => {}
            JsNativeErrorKind::Range if target_type == ErrorType::RangeError => {}
            JsNativeErrorKind::Type if target_type == ErrorType::TypeError => {}
            _ => return false,
        }
        true
    } else {
        let passed = error
            .as_opaque()
            .expect("try_native cannot fail if e is not opaque")
            .as_object()
            .and_then(|o| o.get(js_string!("constructor"), context).ok())
            .as_ref()
            .and_then(JsValue::as_object)
            .and_then(|o| o.get(js_string!("name"), context).ok())
            .as_ref()
            .and_then(JsValue::as_string)
            .map(|s| s == target_type.as_str())
            .unwrap_or_default();
        passed
    }
}