test: add 'get the trash path using a dangling symlink on a mounted d…

…rive'

A future commit should fix this :-).  Here is the failing test result:

  /home/alan-sysop/src/npm-packages/xdg-trashdir/test/test.js:56

   55:     const dir = await trashdir(filename);
   56:     t.is(dirname, dir);
   57:

  Difference:

  - '/home/alan-sysop/src/npm-packages/xdg-trashdir/test/test-disk2/.Trash-1000'
  + '/home/alan-sysop/.local/share/Trash'

test/test.js

@@ -43,6 +43,21 @@ if (!process.env.CI) {
 		await execa(path.join(__dirname, 'mount_clean'), [name]);
 	});
 
+	test('get the trash path using a dangling symlink on a mounted drive', async t => {
+		const name = path.join(__dirname, 'test-disk2');
+		const dirname = path.join(name, '.Trash-') + process.getuid();
+
+		await execa(path.join(__dirname, 'mount_create'), [name]);
+
+		const filename = path.join(name, 'dangly');
+		fs.symlinkSync('nonexistent', filename);
+
+		const dir = await trashdir(filename);
+		t.is(dirname, dir);
+
+		await execa(path.join(__dirname, 'mount_clean'), [name]);
+	});
+
 	test('get the trash path on a mounted drive with a top trash', async t => {
 		const name = path.join(__dirname, 'test-disk-top');
 		const dirname = path.join(name, '.Trash', String(process.getuid()));