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Update: fix counting jsx comment len in max-len (fixes #12213) #12661

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merged 6 commits into from Jan 9, 2020
Merged

Update: fix counting jsx comment len in max-len (fixes #12213) #12661

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c6dd11f
Update: fix counting jsx comment len in max-len (fixes #12213)
yeonjuan Dec 13, 2019
f6fe244
Add test cases
yeonjuan Dec 24, 2019
f486da5
map comments with desired nodes
yeonjuan Dec 30, 2019
ffcf5d2
push a unique node only
yeonjuan Jan 1, 2020
7505f50
fix checking node, add more test cases
yeonjuan Jan 1, 2020
ca6e442
add more test cases
yeonjuan Jan 2, 2020
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22 changes: 22 additions & 0 deletions lib/rules/max-len.js
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Expand Up @@ -183,6 +183,23 @@ module.exports = {
(end.line > lineNumber || (end.line === lineNumber && end.column === line.length));
}

/**
* Check if a comment is in the single line JSXEmptyExpression.
* @param {ASTNode} comment The comment to check.
* @returns {boolean} True if the comment is in the single line JSXEmptyExpression.
*/
function isCommentInSingleLineJSXEmptyExpression(comment) {
const node = sourceCode.getNodeByRangeIndex(comment.range[0]);

if (!node || !node.parent || node.type !== "JSXEmptyExpression" || node.parent.type !== "JSXExpressionContainer") {
return false;
}

const parent = node.parent;

return parent.loc.start.line === parent.loc.end.line;
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}

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/**
* Gets the line after the comment and any remaining trailing whitespace is
* stripped.
Expand Down Expand Up @@ -305,6 +322,11 @@ module.exports = {
// and step back by one
comment = comments[--commentsIndex];

// check jsx comment
if (isCommentInSingleLineJSXEmptyExpression(comment)) {
comment = sourceCode.getNodeByRangeIndex(comment.range[0]).parent;
}
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if (isFullLineComment(line, lineNumber, comment)) {
lineIsComment = true;
textToMeasure = line;
Expand Down
122 changes: 122 additions & 0 deletions tests/lib/rules/max-len.js
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Expand Up @@ -195,6 +195,45 @@ ruleTester.run("max-len", rule, {
{
code: "\tfoo",
options: [4, { tabWidth: 0 }]
},

// https://github.com/eslint/eslint/issues/12213
{
code: "var jsx = (<>\n" +
" { /* this line has 38 characters */}\n" +
"</>)",
options: [15, { comments: 38 }],
parserOptions: { ecmaFeatures: { jsx: true } }
},
{
code: "var jsx = (<>\n" +
"\t\t{ /* this line has 40 characters */}\n" +
"</>)",
options: [15, 4, { comments: 44 }],
parserOptions: { ecmaFeatures: { jsx: true } }
},
{
code: "var jsx = (<>\n" +
" <> text </>{ /* this line has 49 characters */}\n" +
"</>)",
options: [13, { ignoreComments: true }],
parserOptions: { ecmaFeatures: { jsx: true } }
},
{
code: "var jsx = (<>\n" +
" {/* this line has 37 characters */}\n" +
" <> </> {/* this line has 44 characters */}\n" +
"</>)",
options: [44, { comments: 37 }],
parserOptions: { ecmaFeatures: { jsx: true } }
},
{
code: "var jsx = (<>\n" +
" {/* this line has 37 characters */}\n" +
" <> </> {/* this line has 44 characters */}\n" +
"</>)",
options: [37, { ignoreTrailingComments: true }],
parserOptions: { ecmaFeatures: { jsx: true } }
}
],

Expand Down Expand Up @@ -650,6 +689,89 @@ ruleTester.run("max-len", rule, {
column: 1
}
]
},

// https://github.com/eslint/eslint/issues/12213
{
code: "var jsx = (<>\n" +
" { /* this line has 38 characters */}\n" +
"</>)",
options: [15, { comments: 37 }],
parserOptions: { ecmaFeatures: { jsx: true } },
errors: [
{
messageId: "maxComment",
data: { lineLength: 38, maxCommentLength: 37 },
type: "Program",
line: 2,
column: 1
}
]
},
{
code: "var jsx = (<>\n" +
"\t\t{ /* this line has 40 characters */}\n" +
"</>)",
options: [15, 4, { comments: 40 }],
parserOptions: { ecmaFeatures: { jsx: true } },
errors: [
{
messageId: "maxComment",
data: { lineLength: 44, maxCommentLength: 40 },
type: "Program",
line: 2,
column: 1
}
]
},
{
code: "var jsx = (<>\n" +
"{ 38/* this line has 38 characters */}\n" +
"</>)",
options: [15, { comments: 37 }],
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parserOptions: { ecmaFeatures: { jsx: true } },
errors: [
{
messageId: "max",
data: { lineLength: 38, maxLength: 15 },
type: "Program",
line: 2,
column: 1
}
]
},
{
code: "var jsx = (<>\n" +
" <> 50 </>{ 50/* this line has 50 characters */}\n" +
"</>)",
options: [49, { comments: 100 }],
parserOptions: { ecmaFeatures: { jsx: true } },
errors: [
{
messageId: "max",
data: { lineLength: 50, maxLength: 49 },
type: "Program",
line: 2,
column: 1
}
]
},
{
code: "var jsx = (<>\n" +
" {/* this line has 44 characters */}\n" +
" <> </> {/* this line has 44 characters */}\n" +
"</>)",
options: [37, { ignoreTrailingComments: true }],
parserOptions: { ecmaFeatures: { jsx: true } },
errors: [
{
messageId: "max",
data: { lineLength: 44, maxLength: 37 },
type: "Program",
line: 2,
column: 1
}
]
}
]
});