What methods can I employ to intentionally trigger a mongodb error in order to evaluate the try and catch condition using jest?

Testing my code is essential, but I want to ensure that any errors are caught and handled properly. This is achieved by structuring my code in a way that prevents it from reaching the catch condition.

This is made possible by using a throw condition for the Promise. The handling of this promise is done in another file, ensuring that errors can be managed effectively.

export const userExists = async (name, phone) => {
  try {
    const userExists = await Promise.all([User.findOne({ name}), User.findOne({ phone})]);
    if (userExists.some(el => !!el)) return true;
    else return false;
  } catch (error) {
    return error;
  }
};

Answer №1

Ensure to insert the following code inside your try block:

throw new Error("Test Error")

Just like this:

const checkIfUserExists = async (name, phone) => {
  try {
    throw new Error("Test Error");
    const userExists = await Promise.all([User.findOne({ name}), User.findOne({ phone})]);
    if (userExists.some(el => !!el)) return true;
    else return false;
  } catch (error) {
    return error;
  }
};

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