Breaking change between 3.4.0 and 3.7.1?

[digitalsadhu]

Somewhere between 3.4.0 and 3.7.1 something broke for us. Pinning to 3.4.0 fixed it.

TypeError: normalizedValue is not a function
    at MultiVariantAbTestingStrategy.getVariation (/home/node/src/node_modules/@finn-no/express-unleash-middleware/lib/strategy/multi-variant-ab-testing.js:45:28)
    at ExperimentTracker.getFirstEnabledVariation (/home/node/src/node_modules/@finn-no/express-unleash-middleware/lib/experiment/experiment-tracker.js:97:30)
    at ExperimentTracker.getVariation (/home/node/src/node_modules/@finn-no/express-unleash-middleware/lib/experiment/experiment-tracker.js:84:39)
    at ExperimentTracker.startExperiment (/home/node/src/node_modules/@finn-no/express-unleash-middleware/lib/experiment/experiment-tracker.js:48:32)
    at Object.startExperiment (/home/node/src/node_modules/@finn-no/express-unleash-middleware/lib/index.js:122:39)
    at /home/node/src/src/layouts/frontpage/index.js:151:69
    at Layer.handle [as handle_request] (/home/node/src/node_modules/express/lib/router/layer.js:95:5)
    at next (/home/node/src/node_modules/express/lib/router/route.js:137:13)
    at /home/node/src/node_modules/@finn-no/express-unleash-middleware/lib/index.js:127:13
    at Layer.handle [as handle_request] (/home/node/src/node_modules/express/lib/router/layer.js:95:5)

[digitalsadhu]

Looks like it comes from our usage:

const { normalizedValue } = require('unleash-client/lib/strategy/util');

at some point normalizedValue stopped being a function

[chriswk]

I think using const normalizedValue = require('unleash-client/lib/strategy/util'); would fix it.

Though this is not actually part of the official API, we did not make a majorVersion release. Be aware that this can break in the future, for instance if we need another internal util function for strategies.

---

After migrating to airbnb eslint the function was switched to export default rather than an explicit export by name.

[digitalsadhu]

Looks like its because of a change to the build output. I had to change it to:

const util = require('unleash-client/lib/strategy/util');

const normalizedValue = util.default;