TypeError: context.log.warn is not a function

[rukasakurai]

Repro steps

1. For ah httpTrigger Azure Function written in TypeScript
2. Add context.log.warn("xxx"); to the code
3. Run a unit test on the function using jest

Expected behavior

The expected behavior is that the unit test passes.

Actual behavior

TypeError: context.log.warn is not a function

[rukasakurai]

Here's some sample code that reproduces the error when running npm test to execute the jest unit tests on the code:
https://github.com/rukasakurai/azure-functions-httptrigger-typescript-sample

[mhoeger]

Hi @rukasakurai, it looks like your original issue is resolved but I can keep this issue open to track better support for unit tests? Please note though that we likely won't publish those as there are many different testing frameworks and will rely on other folks to contribute (example: https://www.npmjs.com/package/azure-function-context-mock)

[ThaddeusJiang]

Hi @rukasakurai @mhoeger

It works.

const context = {
  log: jest.fn(),
}

context.log.warn = jest.fn();

[ejizba]

Closing in favor of #515 and #120