From 0bd6e3dd0cb32130ef4d3fa879cea5fd69d33175 Mon Sep 17 00:00:00 2001
From: Kai Cataldo <kaicataldo@gmail.com>
Date: Sun, 5 Jun 2016 15:44:06 -0400
Subject: [PATCH] Fix: max-len will warn indented comment lines (fixes #6322)

---
 lib/rules/max-len.js       |   5 +-
 tests/lib/rules/max-len.js | 146 +++++++++++++++++++++++++++++++++++++
 2 files changed, 149 insertions(+), 2 deletions(-)

diff --git a/lib/rules/max-len.js b/lib/rules/max-len.js
index faff093d716..b379835792b 100644
--- a/lib/rules/max-len.js
+++ b/lib/rules/max-len.js
@@ -157,10 +157,11 @@ module.exports = {
          */
         function isFullLineComment(line, lineNumber, comment) {
             var start = comment.loc.start,
-                end = comment.loc.end;
+                end = comment.loc.end,
+                isFirstTokenOnLine = !line.slice(0, comment.loc.start.column).trim();
 
             return comment &&
-                (start.line < lineNumber || (start.line === lineNumber && start.column === 0)) &&
+                (start.line < lineNumber || (start.line === lineNumber && isFirstTokenOnLine)) &&
                 (end.line > lineNumber || end.column === line.length);
         }
 
diff --git a/tests/lib/rules/max-len.js b/tests/lib/rules/max-len.js
index 47e687ae116..6624eed5310 100644
--- a/tests/lib/rules/max-len.js
+++ b/tests/lib/rules/max-len.js
@@ -85,6 +85,43 @@ ruleTester.run("max-len", rule, {
             options: [40, 4, {ignoreComments: true, ignoreTrailingComments: false}]
         },
 
+        // check indented comment lines - https://github.com/eslint/eslint/issues/6322
+        {
+            code: "function foo() {\n" +
+                  "//this line has 29 characters\n" +
+                  "}",
+            options: [40, 4, { comments: 29 }]
+        }, {
+            code: "function foo() {\n" +
+                  "    //this line has 33 characters\n" +
+                  "}",
+            options: [40, 4, { comments: 33 }]
+        }, {
+            code: "function foo() {\n" +
+                  "/*this line has 29 characters\n" +
+                  "and this one has 21*/\n" +
+                  "}",
+            options: [40, 4, { comments: 29 }]
+        }, {
+            code: "function foo() {\n" +
+                  "    /*this line has 33 characters\n" +
+                  "    and this one has 25*/\n" +
+                  "}",
+            options: [40, 4, { comments: 33 }]
+        }, {
+            code: "function foo() {\n" +
+                  "    var a; /*this line has 40 characters\n" +
+                  "    and this one has 36 characters*/\n" +
+                  "}",
+            options: [40, 4, { comments: 36 }]
+        }, {
+            code: "function foo() {\n" +
+                  "    /*this line has 33 characters\n" +
+                  "    and this one has 43 characters*/ var a;\n" +
+                  "}",
+            options: [43, 4, { comments: 33 }]
+        },
+
         // blank line
         ""
     ],
@@ -248,6 +285,115 @@ ruleTester.run("max-len", rule, {
                     column: 1
                 }
             ]
+        },
+
+        // check indented comment lines - https://github.com/eslint/eslint/issues/6322
+        {
+            code: "function foo() {\n" +
+                  "//this line has 29 characters\n" +
+                  "}",
+            options: [40, 4, { comments: 28 }],
+            errors: [
+                {
+                    message: "Line 2 exceeds the maximum comment line length of 28.",
+                    type: "Program",
+                    line: 2,
+                    column: 1
+                }
+            ]
+        }, {
+            code: "function foo() {\n" +
+                  "    //this line has 33 characters\n" +
+                  "}",
+            options: [40, 4, { comments: 32 }],
+            errors: [
+                {
+                    message: "Line 2 exceeds the maximum comment line length of 32.",
+                    type: "Program",
+                    line: 2,
+                    column: 1
+                }
+            ]
+        }, {
+            code: "function foo() {\n" +
+                  "/*this line has 29 characters\n" +
+                  "and this one has 32 characters*/\n" +
+                  "}",
+            options: [40, 4, { comments: 28 }],
+            errors: [
+                {
+                    message: "Line 2 exceeds the maximum comment line length of 28.",
+                    type: "Program",
+                    line: 2,
+                    column: 1
+                },
+                {
+                    message: "Line 3 exceeds the maximum comment line length of 28.",
+                    type: "Program",
+                    line: 3,
+                    column: 1
+                }
+            ]
+        }, {
+            code: "function foo() {\n" +
+                  "    /*this line has 33 characters\n" +
+                  "    and this one has 36 characters*/\n" +
+                  "}",
+            options: [40, 4, { comments: 32 }],
+            errors: [
+                {
+                    message: "Line 2 exceeds the maximum comment line length of 32.",
+                    type: "Program",
+                    line: 2,
+                    column: 1
+                },
+                {
+                    message: "Line 3 exceeds the maximum comment line length of 32.",
+                    type: "Program",
+                    line: 3,
+                    column: 1
+                }
+            ]
+        }, {
+            code: "function foo() {\n" +
+                  "    var a; /*this line has 40 characters\n" +
+                  "    and this one has 36 characters*/\n" +
+                  "}",
+            options: [39, 4, { comments: 35 }],
+            errors: [
+                {
+                    message: "Line 2 exceeds the maximum line length of 39.",
+                    type: "Program",
+                    line: 2,
+                    column: 1
+                },
+                {
+                    message: "Line 3 exceeds the maximum comment line length of 35.",
+                    type: "Program",
+                    line: 3,
+                    column: 1
+                }
+            ]
+        }, {
+            code: "function foo() {\n" +
+                  "    /*this line has 33 characters\n" +
+                  "    and this one has 43 characters*/ var a;\n" +
+                  "}",
+            options: [42, 4, { comments: 32 }],
+            errors: [
+                {
+                    message: "Line 2 exceeds the maximum comment line length of 32.",
+                    type: "Program",
+                    line: 2,
+                    column: 1
+                },
+                {
+                    message: "Line 3 exceeds the maximum line length of 42.",
+                    type: "Program",
+                    line: 3,
+                    column: 1
+                }
+            ]
         }
     ]
 });