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Breaking: make radix rule stricter #12608

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merged 6 commits into from Jan 20, 2020
Merged

Breaking: make radix rule stricter #12608

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860d826
Update: make `radix` rule stricter
fisker Nov 27, 2019
92a597e
style: remove extra blank line
fisker Dec 23, 2019
62b7645
Update message, more tests
fisker Jan 18, 2020
6d9cb4e
Variable name & exponential notation test
fisker Jan 18, 2020
c078e12
test `10.0`
fisker Jan 18, 2020
72ef36f
Add tests `1` `2` `36`
fisker Jan 19, 2020
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2 changes: 2 additions & 0 deletions docs/rules/radix.md
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Expand Up @@ -43,6 +43,8 @@ var num = parseInt(someValue);

var num = parseInt("071", "abc");

var num = parseInt("071", 37);

var num = parseInt();
```

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6 changes: 4 additions & 2 deletions lib/rules/radix.js
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Expand Up @@ -18,6 +18,8 @@ const astUtils = require("./utils/ast-utils");
const MODE_ALWAYS = "always",
MODE_AS_NEEDED = "as-needed";

const validRadixNumbers = new Set(Array.from({ length: 37 - 2 }, (_, index) => index + 2));

/**
* Checks whether a given variable is shadowed or not.
* @param {eslint-scope.Variable} variable A variable to check.
Expand Down Expand Up @@ -47,14 +49,14 @@ function isParseIntMethod(node) {
*
* The following values are invalid.
*
* - A literal except numbers.
* - A literal except integers between 2 and 36.
* - undefined.
* @param {ASTNode} radix A node of radix to check.
* @returns {boolean} `true` if the node is valid.
*/
function isValidRadix(radix) {
return !(
(radix.type === "Literal" && typeof radix.value !== "number") ||
(radix.type === "Literal" && !validRadixNumbers.has(radix.value)) ||
(radix.type === "Identifier" && radix.name === "undefined")
);
}
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14 changes: 14 additions & 0 deletions tests/lib/rules/radix.js
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Expand Up @@ -107,6 +107,13 @@ ruleTester.run("radix", rule, {
type: "CallExpression"
}]
},
{
code: "parseInt(\"10\", 37);",
errors: [{
message: "Invalid radix parameter.",
type: "CallExpression"
}]
},
{
code: "Number.parseInt();",
errors: [{
Expand All @@ -129,6 +136,13 @@ ruleTester.run("radix", rule, {
type: "CallExpression"
}]
},
{
code: "Number.parseInt(\"10\", 37);",
errors: [{
message: "Invalid radix parameter.",
type: "CallExpression"
}]
},
{
code: "parseInt(\"10\", 10);",
options: ["as-needed"],
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