Bug 1808009 - Clean up writable file streams after every test. r=dom-storage-reviewers,jesup

Differential Revision: https://phabricator.services.mozilla.com/D165730

testing/web-platform/tests/fs/script-tests/FileSystemBaseHandle-getUniqueId.js

@@ -72,7 +72,7 @@ directory_test(async (t, root_dir) => {
   const id_before = await handle.getUniqueId();
 
   // Write to the file. The unique ID should not change.
-  const writable = await handle.createWritable();
+  const writable = await cleanup_writable(t, await handle.createWritable());
   await writable.write("blah");
   await writable.close();
 

testing/web-platform/tests/fs/script-tests/FileSystemBaseHandle-remove.js

@@ -79,7 +79,7 @@ directory_test(async (t, root) => {
       await createFileWithContents(t, 'file-to-remove', '12345', root);
   await createFileWithContents(t, 'file-to-keep', 'abc', root);
 
-  const writable = await handle.createWritable();
+  const writable = await cleanup_writable(t, await handle.createWritable());
   await promise_rejects_dom(t, 'NoModificationAllowedError', handle.remove());
 
   await writable.close();

testing/web-platform/tests/fs/script-tests/FileSystemDirectoryHandle-removeEntry.js

@@ -179,7 +179,7 @@ directory_test(async (t, root) => {
       await createFileWithContents(t, 'file-to-remove', '12345', root);
   await createFileWithContents(t, 'file-to-keep', 'abc', root);
 
-  const writable = await handle.createWritable();
+  const writable = await cleanup_writable(t, await handle.createWritable());
   await promise_rejects_dom(
       t, 'NoModificationAllowedError', root.removeEntry('file-to-remove'));