Running Jest tests I got "The body of the arrow function supplied to `idx` must be a single expression"

The body of the arrow function supplied to `idx` must be a single expression (without curly braces).
        36 |            })
        37 |                    .then(res => {
      > 38 |                            const similarItems = idx(res, _ => _.data.similarDeals) || [];
           |                                                               ^
        39 |                            if (similarItems.length) {
        40 | 
        41 |                                    const converted = similarItems.map(item => {

[jsdario]

Is there anyway to work this around? I had the issue above a long time running, I thought to maybe implement a function identical to idx locally rather using the babel plugin.

[yungsters]

Interesting! I wonder if a coverage plugin is injecting extra AST nodes into the arrow function.

Thanks for that insight. I’ll need to brainstorm with @cpojer about how to best proceed.