Function withinIsolatedEditor

test/cmd_line/only.test.ts:25–30

(lambda: () => Thenable<unknown>)

  });

const withinIsolatedEditor = async (lambda: () => Thenable<unknown>) => {
  await vscode.commands.executeCommand('workbench.action.files.newUntitledFile');
  const result = await lambda();
  await vscode.commands.executeCommand('workbench.action.closeActiveEditor');
  return result;
};

const getNumberOfVisibleLines = async () =>
  vscode.window.activeTextEditor!.visibleRanges[0].end.line;