prefer-to-be-undefined.js
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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = void 0;
var _experimentalUtils = require("@typescript-eslint/experimental-utils");
var _utils = require("./utils");
const isUndefinedIdentifier = node => node.type === _experimentalUtils.AST_NODE_TYPES.Identifier && node.name === 'undefined';
/**
* Checks if the given `ParsedExpectMatcher` is a call to one of the equality matchers,
* with a `undefined` identifier as the sole argument.
*
* @param {ParsedExpectMatcher} matcher
*
* @return {matcher is ParsedEqualityMatcherCall<MaybeTypeCast<UndefinedIdentifier>>}
*/
const isUndefinedEqualityMatcher = matcher => (0, _utils.isParsedEqualityMatcherCall)(matcher) && isUndefinedIdentifier((0, _utils.followTypeAssertionChain)(matcher.arguments[0]));
var _default = (0, _utils.createRule)({
name: __filename,
meta: {
docs: {
category: 'Best Practices',
description: 'Suggest using `toBeUndefined()`',
recommended: false
},
messages: {
useToBeUndefined: 'Use toBeUndefined() instead'
},
fixable: 'code',
type: 'suggestion',
schema: []
},
defaultOptions: [],
create(context) {
return {
CallExpression(node) {
if (!(0, _utils.isExpectCall)(node)) {
return;
}
const {
matcher
} = (0, _utils.parseExpectCall)(node);
if (matcher && isUndefinedEqualityMatcher(matcher)) {
context.report({
fix: fixer => [fixer.replaceText(matcher.node.property, 'toBeUndefined'), fixer.remove(matcher.arguments[0])],
messageId: 'useToBeUndefined',
node: matcher.node.property
});
}
}
};
}
});
exports.default = _default;