Fix prettier and other rules working at the same time (#360)

* add tests for --fix option

* fix issue #354

.eslintrc.cjs

@@ -7,4 +7,7 @@ module.exports = {
     'plugin:n/recommended',
     'plugin:prettier/recommended',
   ],
+  env: {
+    node: true,
+  },
 };

index.js

@@ -43,7 +43,6 @@ const ruleFunction = (expectation, options, context) => {
     // Default to '<input>' if a filepath was not provided.
     // This mimics eslint's behaviour
     const filepath = root.source.input.file || '<input>';
-    const source = root.source.input.css;
 
     const prettierRcOptions = await prettier.resolveConfig(filepath, {
       editorconfig: true,
@@ -107,6 +106,7 @@ const ruleFunction = (expectation, options, context) => {
 
     let prettierSource;
 
+    const source = root.toString();
     try {
       prettierSource = await prettier.format(source, prettierOptions);
     } catch (err) {
@@ -182,7 +182,7 @@ const ruleFunction = (expectation, options, context) => {
           insertText +
           rawData.substring(difference.offset + deleteText.length)
         );
-      }, root.source.input.css);
+      }, source);
 
       // If root.source.syntax exists then it means stylelint had to use
       // postcss-syntax to guess the postcss parser that it should use based

test/stylelint-prettier-e2e.test.js

@@ -4,8 +4,14 @@ import {spawnSync} from 'node:child_process';
 import {resolve, sep, dirname} from 'node:path';
 import {fileURLToPath} from 'node:url';
 
+import stylelint from 'stylelint';
+
+import baseConfig from './fixtures/stylelint.config.js';
+
 const __dirname = dirname(fileURLToPath(import.meta.url));
 
+const stylelintCwd = `${__dirname}/fixtures`;
+
 /**
  * Tests that report errors in multiple files may change the order of the files
  * across multiple runs.
@@ -65,15 +71,33 @@ describe('E2E Tests', () => {
     assert.strictEqual(result.error, expectedResult);
     assert.strictEqual(result.status, 0);
   });
+
+  /** @see https://github.com/prettier/stylelint-prettier/issues/354 */
+  test('the --fix option works correctly with other rules', async () => {
+    const inputCode = `.a {\n  color: #ffffff;\n  font-size: 16px\n}\n`;
+    const fixConfig = structuredClone(baseConfig);
+    fixConfig.rules['color-hex-length'] = 'short';
+
+    const {code: outputCode} = await stylelint.lint({
+      code: inputCode,
+      configBasedir: stylelintCwd,
+      fix: true,
+      config: fixConfig,
+    });
+
+    assert.strictEqual(
+      outputCode,
+      '.a {\n  color: #fff;\n  font-size: 16px;\n}\n'
+    );
+  });
 });
 
 function runStylelint(pattern) {
   const stylelintCmd = resolve(`${__dirname}/../node_modules/.bin/stylelint`);
-  const cwd = `${__dirname}/fixtures`;
 
   // Use github formatter as it is less likely to change across releases
   const result = spawnSync(stylelintCmd, ['--formatter=github', pattern], {
-    cwd,
+    cwd: stylelintCwd,
   });
 
   return {
@@ -82,6 +106,6 @@ function runStylelint(pattern) {
     error: result.stderr
       .toString()
       .trim()
-      .replaceAll(`file=${cwd}${sep}`, 'file='),
+      .replaceAll(`file=${stylelintCwd}${sep}`, 'file='),
   };
 }