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@jest/create-cache-key-function
Advanced tools
This module creates a function which is used for generating cache keys used by code transformers in Jest.
$ npm install --save-dev @jest/create-cache-key-function
createCacheKey(files?: Array<string>, values?: Array<String>, length?: number): GetCacheKeyFunction
Returns a function that can be used to generate cache keys based on source code of provided files and provided values.
files
: [Optional] Array of absolute paths to files whose code should be accounted for when generating cache keyvalues
: [Optional] Array of string values that should be accounted for when generating cache keylength
: [Optional] Length of the resulting key. The default is 32
, or 16
on Windows.Note:
The source code for your test is already taken into account when generating the cache key. The files
array should be used to provide files that are not directly related to your code such as external configuration files.
Here is some sample usage code while creating a new transformer for Jest
const createCacheKeyFunction =
require('@jest/create-cache-key-function').default;
const filesToAccountFor = [
__filename,
require.resolve('some-package-name/package.json'),
];
const valuesToAccountFor = [process.env.SOME_LOCAL_ENV, 'Some_Other_Value'];
module.exports = {
process(src, filename, config, options) {},
getCacheKey: createCacheKeyFunction(filesToAccountFor, valuesToAccountFor),
};
FAQs
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The npm package @jest/create-cache-key-function receives a total of 4,860,786 weekly downloads. As such, @jest/create-cache-key-function popularity was classified as popular.
We found that @jest/create-cache-key-function demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 5 open source maintainers collaborating on the project.
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