CODEWITHSUNDEEP
node.jsmongodbexpressmongoose
Durja
Durja

Reputation: 667

How to simulate error for document.save() in mongodb?

DB: Mongo ODM: I am using Mongoose as the ODM.

I am writing negative tests for document.save() function for my app. How do I simulate or replicate an error while saving the document so that I can assert accordingly.

const CreateArtist = async (artist) => {
    try {
        await dbConnect();
        const user = await new Artist(artist);
        await user.validate();
        return await user.save(); // want to test for error on save.
    } catch (err) {
        throw err;
    }
};

I have tried changing the connection string, but I got the connection string wrong error. I am unsure how to replicate the error on save.

Upvotes: 2

Views: 1123

Answers (1)

D_________
D_________

Reputation: 583

You could try writing a pre-save function that returns an error:

user.pre('save', function(next) {
    return next(new Error('myCustomError'));
});
user.save() // throws myCustomError

adapted from the docs here

Upvotes: 5

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