Regression: Jest 20: collectCoverage not passed to processor in config object any longer

[joscha]

Do you want to request a feature or report a bug?

bug

What is the current behavior?

when using a preprocessor like:

function process(src, path, config, transformOptions) {
}
exports.process = process;

config does no longer contain the collectCoverage flag as part of the config object.

What is the expected behavior?

config has the collectCoverage flag based on the collectCoverage config setting or --coverage CLI flag.
ts-jest is using this flag to change some options regarding coverage collection, see kulshekhar/ts-jest#202 and kulshekhar/ts-jest#201

Please provide your exact Jest configuration and mention your Jest, node, yarn/npm version and operating system.

Jest 20.0.0
yarn v0.23.2
node v7.10.0
OSX Sierra

[thymikee]

I think this is undocumented breaking change. We've redesigned script transformation and now it takes fourth parameter with instrument flag:

function process(src, path, projectConfig, {instrument: true) {
  // stuff
}
exports.process = process;

[github-actions]

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