How to create ResponseErrors in TypeScript

[elastic]

How to create ResponseErrors in TypeScript

[nesjett]

To me, this worked out:

      mock.add({ 
          method: 'POST', 
          path: `/my_index/_bulk`
      }, () => ( 
          new ResponseError({
              body: error,
              statusCode: 404,
              headers: {},
              meta: {} as any,
              warnings: [],
          })
      ));

Note: If you want to still return the "meta" prop, you can do the same strategy with the connection: connection: {} as any

Note2: "error" is a const defined earlier, with the desired content

[seantalbot-jisc]

In case it's helpful to others, I worked around this by manually crafting one:

const err = Object.create(ResponseError.prototype);
Object.assign(err, {
    meta: {
        body: {
            status: 500,
            error: {
                type: "whatever",
            },
        },
        500,
        headers: {},
    },
});

This means the object returns true to instanceof ResponseError in my exception handler code and works for my use case.

[seantalbot-jisc]

I'm using

"@elastic/elasticsearch-mock": "0.3.0",
"@elastic/elasticsearch": "7.9.1",

in case that helps.

[rokumura7]

I'm getting stuck too.
I'd like to use ResponseError to write tests for unexpected requests, but there is more code to generate ResponseError, in other words, the code for testing is getting mess.
I'd like to know if there is a better way to mock ResponseError.