fix: incorrect auto-fix in yml/sort-keys rule

.eslintrc.for-vscode.js

@@ -1,6 +1,7 @@
 "use strict";
 
 module.exports = {
+  root: true,
   extends: [require.resolve("./.eslintrc.js")],
   overrides: [
     {

package.json

@@ -17,6 +17,7 @@
     "clean": "rimraf .nyc_output dist coverage",
     "lint": "eslint . --ext .js,.vue,.ts,.json,.md,.yml,.yaml",
     "eslint-fix": "eslint . --ext .js,.vue,.ts,.json,.md,.yml,.yaml --fix",
+    "eslint-test-fix": "eslint tests/src/rules/*.ts --fix -c .eslintrc.for-vscode.js",
     "pretest:base": "cross-env DEBUG=eslint-plugin-yml*",
     "test:base": "npm run mocha -- \"tests/src/**/*.ts\" --reporter dot --timeout 60000",
     "test": "npm run test:base",
@@ -90,7 +91,7 @@
     "eslint-config-prettier": "^9.0.0",
     "eslint-plugin-eslint-comments": "^3.2.0",
     "eslint-plugin-eslint-plugin": "^5.0.0",
-    "eslint-plugin-eslint-rule-tester": "^0.5.1",
+    "eslint-plugin-eslint-rule-tester": "^0.6.0",
     "eslint-plugin-json-schema-validator": "^4.7.4",
     "eslint-plugin-jsonc": "^2.0.0",
     "eslint-plugin-markdown": "^3.0.0",

src/rules/sort-keys.ts

@@ -720,10 +720,7 @@ export default createRule("sort-keys", {
           nodeLocs.range[0],
           nodeLocs.range[0] + diffIndent,
         )}`;
-        yield fixer.insertTextBeforeRange(
-          moveTargetLocs.range,
-          `${insertCode}${moveTargetLocs.loc.start.line === 1 ? "\n" : ""}`,
-        );
+        yield fixer.insertTextBeforeRange(moveTargetLocs.range, insertCode);
 
         const removeRange: AST.Range = [
           getNewlineStartIndex(nodeLocs.range[0]),

tests/src/rules/sort-keys.ts

@@ -429,6 +429,102 @@ tester.run(
             "Expected mapping keys to be in specified order. 'e' should be before 'z'.",
           ],
         },
+        {
+          code: `- b: 1
+  c: 2
+  a: 3
+`,
+          errors: [
+            {
+              message:
+                "Expected mapping keys to be in ascending order. 'a' should be before 'c'.",
+              line: 3,
+              column: 3,
+            },
+          ],
+          output: `- a: 3
+  b: 1
+  c: 2
+`,
+        },
+        {
+          code: `
+- b: 1
+  c: 2
+  a: 3
+`,
+          errors: [
+            {
+              message:
+                "Expected mapping keys to be in ascending order. 'a' should be before 'c'.",
+              line: 4,
+              column: 3,
+            },
+          ],
+          output: `
+- a: 3
+  b: 1
+  c: 2
+`,
+        },
+        {
+          code: `b: 1
+c: 2
+a: 3
+`,
+          errors: [
+            {
+              message:
+                "Expected mapping keys to be in ascending order. 'a' should be before 'c'.",
+              line: 3,
+              column: 1,
+            },
+          ],
+          output: `
+a: 3
+b: 1
+c: 2
+`,
+        },
+        {
+          code: ` b: 1
+ c: 2
+ a: 3
+`,
+          errors: [
+            {
+              message:
+                "Expected mapping keys to be in ascending order. 'a' should be before 'c'.",
+              line: 3,
+              column: 2,
+            },
+          ],
+          output: `
+ a: 3
+ b: 1
+ c: 2
+`,
+        },
+        {
+          code: `
+b: 1
+c: 2
+a: 3
+`,
+          errors: [
+            {
+              message:
+                "Expected mapping keys to be in ascending order. 'a' should be before 'c'.",
+              line: 4,
+              column: 1,
+            },
+          ],
+          output: `
+a: 3
+b: 1
+c: 2
+`,
+        },
       ],
     },
   ),