tests(cli): ensure missing directories are created when writing to file

Signed-off-by: Nathanael Bracy <[email protected]>

cli/printer.js

@@ -67,7 +67,7 @@ function writeFile(filePath, output, outputMode) {
         if (err) {
           return reject(err);
         }
-        log.log('Printer', `${LH.OutputMode[outputMode]} output written to ${filePath}`);
+        log.log('Printer', `${OutputMode[outputMode]} output written to ${filePath}`);
         resolve();
       });
     });

cli/test/cli/printer-test.js

@@ -6,6 +6,7 @@
 
 import assert from 'assert/strict';
 import fs from 'fs';
+import path from 'path';
 
 import {readJson} from '../../../core/test/test-utils.js';
 import * as Printer from '../../printer.js';
@@ -49,4 +50,20 @@ describe('Printer', () => {
       assert.strictEqual(typeof mode, 'string');
     });
   });
+
+  it('creates missing directories when writing to file', () => {
+    const dirPath = './non/existent/directory/.test-file.json';
+    const report = JSON.stringify(sampleResults);
+    const dir = path.dirname(dirPath);
+    if (fs.existsSync(dir)) {
+      fs.rmdirSync(dir, { recursive: true });
+    }
+    return Printer.write(report, 'json', dirPath).then(_ => {
+      assert.ok(fs.existsSync(dir), `Directory ${dir} should exist now`);
+      const fileContents = fs.readFileSync(dirPath, 'utf8');
+      assert.ok(/lighthouseVersion/gim.test(fileContents));
+      fs.unlinkSync(dirPath);
+      fs.rmdirSync(dir, { recursive: true });
+    });
+  });
 });