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/**
* @fileoverview Check that TypeError[ERR_INVALID_ARG_TYPE] uses
* lowercase for primitive types
* @author Weijia Wang <starkwang@126.com>
*/
'use strict';
//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------
const astSelector = 'NewExpression[callee.property.name="TypeError"]' +
'[arguments.0.value="ERR_INVALID_ARG_TYPE"]';
const primitives = [ 'number', 'string', 'boolean', 'null', 'undefined' ];
module.exports = function(context) {
function checkNamesArgument(node) {
const names = node.arguments[2];
switch (names.type) {
case 'Literal':
checkName(names);
break;
case 'ArrayExpression':
names.elements.forEach((name) => {
checkName(name);
});
break;
}
}
function checkName(node) {
const name = node.value;
const lowercaseName = name.toLowerCase();
if (name !== lowercaseName && primitives.includes(lowercaseName)) {
const msg = `primitive should use lowercase: ${name}`;
context.report({
node,
message: msg,
fix: (fixer) => {
return fixer.replaceText(
node,
`'${lowercaseName}'`
);
}
});
}
}
return {
[astSelector]: (node) => checkNamesArgument(node)
};
};
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