Update: false positives in function-call-argument-newline (fixes #12123) (#12280)

* Fix: false positives on newlines in object/array args (fixes #12123)

* Update: Additional tests for multi-line template string

Author: scottohara

lib/rules/function-call-argument-newline.js

@@ -40,13 +40,13 @@ module.exports = {
         const checkers = {
             unexpected: {
                 messageId: "unexpectedLineBreak",
-                check: (prevToken, currentToken) => prevToken.loc.start.line !== currentToken.loc.start.line,
+                check: (prevToken, currentToken) => prevToken.loc.end.line !== currentToken.loc.start.line,
                 createFix: (token, tokenBefore) => fixer =>
                     fixer.replaceTextRange([tokenBefore.range[1], token.range[0]], " ")
             },
             missing: {
                 messageId: "missingLineBreak",
-                check: (prevToken, currentToken) => prevToken.loc.start.line === currentToken.loc.start.line,
+                check: (prevToken, currentToken) => prevToken.loc.end.line === currentToken.loc.start.line,
                 createFix: (token, tokenBefore) => fixer =>
                     fixer.replaceTextRange([tokenBefore.range[1], token.range[0]], "\n")
             }
@@ -61,7 +61,7 @@ module.exports = {
          */
         function checkArguments(node, checker) {
             for (let i = 1; i < node.arguments.length; i++) {
-                const prevArgToken = sourceCode.getFirstToken(node.arguments[i - 1]);
+                const prevArgToken = sourceCode.getLastToken(node.arguments[i - 1]);
                 const currentArgToken = sourceCode.getFirstToken(node.arguments[i]);
 
                 if (checker.check(prevArgToken, currentArgToken)) {
@@ -101,10 +101,10 @@ module.exports = {
             } else if (option === "always") {
                 checkArguments(node, checkers.missing);
             } else if (option === "consistent") {
-                const firstArgToken = sourceCode.getFirstToken(node.arguments[0]);
+                const firstArgToken = sourceCode.getLastToken(node.arguments[0]);
                 const secondArgToken = sourceCode.getFirstToken(node.arguments[1]);
 
-                if (firstArgToken.loc.start.line === secondArgToken.loc.start.line) {
+                if (firstArgToken.loc.end.line === secondArgToken.loc.start.line) {
                     checkArguments(node, checkers.unexpected);
                 } else {
                     checkArguments(node, checkers.missing);

tests/lib/rules/function-call-argument-newline.js

@@ -46,6 +46,8 @@ ruleTester.run("function-call-argument-newline", rule, {
             options: ["always"],
             parserOptions: { ecmaVersion: 6 }
         },
+        { code: "fn({\n\ta: 1\n},\n\tb,\n\tc)", options: ["always"] },
+        { code: "fn(`\n`,\n\ta)", options: ["always"], parserOptions: { ecmaVersion: 6 } },
 
         /* "never" */
         { code: "fn(a, b)", options: ["never"] },
@@ -59,10 +61,16 @@ ruleTester.run("function-call-argument-newline", rule, {
             options: ["never"],
             parserOptions: { ecmaVersion: 6 }
         },
+        { code: "fn({\n\ta: 1\n}, b)", options: ["never"] },
+        { code: "fn(`\n`, a)", options: ["never"], parserOptions: { ecmaVersion: 6 } },
 
         /* "consistent" */
         { code: "fn(a, b, c)", options: ["consistent"] },
-        { code: "fn(a,\n\tb,\n\tc)", options: ["consistent"] }
+        { code: "fn(a,\n\tb,\n\tc)", options: ["consistent"] },
+        { code: "fn({\n\ta: 1\n}, b, c)", options: ["consistent"] },
+        { code: "fn({\n\ta: 1\n},\n\tb,\n\tc)", options: ["consistent"] },
+        { code: "fn(`\n`, b, c)", options: ["consistent"], parserOptions: { ecmaVersion: 6 } },
+        { code: "fn(`\n`,\n\tb,\n\tc)", options: ["consistent"], parserOptions: { ecmaVersion: 6 } }
     ],
     invalid: [
 
@@ -202,6 +210,35 @@ ruleTester.run("function-call-argument-newline", rule, {
                 }
             ]
         },
+        {
+            code: "fn({\n\ta: 1\n}, b)",
+            output: "fn({\n\ta: 1\n},\nb)",
+            options: ["always"],
+            errors: [
+                {
+                    messageId: "missingLineBreak",
+                    line: 3,
+                    column: 3,
+                    endLine: 3,
+                    endColumn: 4
+                }
+            ]
+        },
+        {
+            code: "fn(`\n`, b)",
+            output: "fn(`\n`,\nb)",
+            options: ["always"],
+            parserOptions: { ecmaVersion: 6 },
+            errors: [
+                {
+                    messageId: "missingLineBreak",
+                    line: 2,
+                    column: 3,
+                    endLine: 2,
+                    endColumn: 4
+                }
+            ]
+        },
 
         /* "never" */
         {
@@ -324,6 +361,35 @@ ruleTester.run("function-call-argument-newline", rule, {
                 }
             ]
         },
+        {
+            code: "fn({\n\ta: 1\n},\nb)",
+            output: "fn({\n\ta: 1\n}, b)",
+            options: ["never"],
+            errors: [
+                {
+                    messageId: "unexpectedLineBreak",
+                    line: 3,
+                    column: 3,
+                    endLine: 4,
+                    endColumn: 1
+                }
+            ]
+        },
+        {
+            code: "fn(`\n`,\nb)",
+            output: "fn(`\n`, b)",
+            options: ["never"],
+            parserOptions: { ecmaVersion: 6 },
+            errors: [
+                {
+                    messageId: "unexpectedLineBreak",
+                    line: 2,
+                    column: 3,
+                    endLine: 3,
+                    endColumn: 1
+                }
+            ]
+        },
 
         /* "consistent" */
         {
@@ -381,6 +447,64 @@ ruleTester.run("function-call-argument-newline", rule, {
                     endColumn: 19
                 }
             ]
+        },
+        {
+            code: "fn({\n\ta: 1\n},\nb, c)",
+            output: "fn({\n\ta: 1\n},\nb,\nc)",
+            options: ["consistent"],
+            errors: [
+                {
+                    messageId: "missingLineBreak",
+                    line: 4,
+                    column: 3,
+                    endLine: 4,
+                    endColumn: 4
+                }
+            ]
+        },
+        {
+            code: "fn({\n\ta: 1\n}, b,\nc)",
+            output: "fn({\n\ta: 1\n}, b, c)",
+            options: ["consistent"],
+            errors: [
+                {
+                    messageId: "unexpectedLineBreak",
+                    line: 3,
+                    column: 6,
+                    endLine: 4,
+                    endColumn: 1
+                }
+            ]
+        },
+        {
+            code: "fn(`\n`,\nb, c)",
+            output: "fn(`\n`,\nb,\nc)",
+            options: ["consistent"],
+            parserOptions: { ecmaVersion: 6 },
+            errors: [
+                {
+                    messageId: "missingLineBreak",
+                    line: 3,
+                    column: 3,
+                    endLine: 3,
+                    endColumn: 4
+                }
+            ]
+        },
+        {
+            code: "fn(`\n`, b,\nc)",
+            output: "fn(`\n`, b, c)",
+            options: ["consistent"],
+            parserOptions: { ecmaVersion: 6 },
+            errors: [
+                {
+                    messageId: "unexpectedLineBreak",
+                    line: 2,
+                    column: 6,
+                    endLine: 3,
+                    endColumn: 1
+                }
+            ]
         }
     ]
 });