eslint-config-eloquence
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Adaptive, robust, eloquent ESLint configuration
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">'use strict'
/**
* Plugin rules for writing effective test queries using the custom Jest DOM
* matchers
*
* 📝 https://github.com/jest-community/eslint-plugin-jest
*/
module.exports = {
// Require tests use the `it` syntax to match Cypress which doesn't support `test`
'jest/consistent-test-it': ['error', { fn: 'it', withinDescribe: 'it' }],
// Require that every test has at least one assertion with `expect`
'jest/expect-expect': 'error',
// Requires that all test and describe names are all lowercase for readability,
// off b/c it's not value added to enforce that
'jest/lowercase-name': 'off',
// Requires that only canonical Jest methods are used, aliases are not allowed
// for easier searching and better consistency
'jest/no-alias-methods': 'error',
// Disallows commenting out tests
'jest/no-commented-out-tests': 'error',
// Prevent expect being conditionally called which can lead to silent test issues
'jest/no-conditional-expect': 'error',
// Prevents using deprecated fns
'jest/no-deprecated-functions': 'error',
// Help prevent accidentally committing disabled tests
'jest/no-disabled-tests': 'error',
// Prefer asnc test fns, linting can be disabled with a comment on why a done cb is needed
'jest/no-done-callback': 'error',
// Prevent accidentally including duplicate setup/teardown hooks
'jest/no-duplicate-hooks': 'error',
// Don't export stuff from test files, it's confusing 😅
'jest/no-export': 'error',
// Help prevent accidentally focused tests (.only)
'jest/no-focused-tests': 'error',
// 🤔 Could be a nice rule to enable to require fn calls for setup/teardown in each test
'jest/no-hooks': 'off',
// Requires unique titles for describe and test blocks
'jest/no-identical-title': 'error',
// No ifs in tests
'jest/no-if': 'error',
// Interpolation in snapshots prevents updating them
'jest/no-interpolation-in-snapshots': 'error',
// Prevent using Jasmine instead of Jest
'jest/no-jasmine-globals': 'error',
// Disallow importing Jest, but this might be ok in the future for TS
'jest/no-jest-import': 'off',
// Prevents large snapshots b/c they're hard to review, not this can be overridden on a
// snapshot by snapshot basis with `allowedSnapshots
'jest/no-large-snapshots': 'error',
// Importing from __mocks__ is an error, the module being mocked should be imported
'jest/no-mocks-import': 'error',
// This rule can be used to forbid specific matchers
'jest/no-restricted-matchers': ['error', {}],
// Expect needs to be in a test block
'jest/no-standalone-expect': 'error',
// Only use `.only` and `.skip` (not `f` and `x`)
'jest/no-test-prefixes': 'error',
// Tests should return void (use async/await for async tests instead of returning a promise)
'jest/no-test-return-statement': 'error',
// Suggest writing better tests with CalledWith or CalledTimes instead of just Called
'jest/prefer-called-with': 'error',
// Way too tedious
'jest/prefer-expect-assertions': 'off',
// Define setup/teardown before tests for better organization
'jest/prefer-hooks-on-top': 'error',
// Prefer setting up mocks with spyOn to not accidentally overwrite real methods
'jest/prefer-spy-on': 'error',
// Assert that object structure matches
'jest/prefer-strict-equal': 'error',
// Better tests and consistency
'jest/prefer-to-be-null': 'error',
// Better tests and consistency
'jest/prefer-to-be-undefined': 'error',
// // Better tests and consistency for array elements
'jest/prefer-to-contain': 'error',
// Better tests and consistency for array length
'jest/prefer-to-have-length': 'error',
// Prefer .todo over an empty test body
'jest/prefer-todo': 'error',
// If an error throws, then it throws
'jest/require-to-throw-message': 'off',
// Require at least one top level describe in each test
'jest/require-top-level-describe': 'error',
// Describe call validations
'jest/valid-describe': 'error',
// Expect call validations
'jest/valid-expect': ['error', { alwaysAwait: true }],
// Don't return promises, use async-await
'jest/valid-expect-in-promise': 'off',
// Title validations
'jest/valid-title': 'error',
}
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