export default function transformer(file, { jscodeshift: j }, options) {
  const source = j(file.source);

  const matcherMap = {
    toBeCalled: 'toHaveBeenCalled',
    toBeCalledTimes: 'toHaveBeenCalledTimes',
    toBeCalledWith: 'toHaveBeenCalledWith',
    lastCalledWith: 'toHaveBeenLastCalledWith',
    nthCalledWith: 'toHaveBeenNthCalledWith',
    toReturn: 'toHaveReturned',
    toReturnTimes: 'toHaveReturnedTimes',
    toReturnWith: 'toHaveReturnedWith',
    lastReturnedWith: 'toHaveLastReturnedWith',
    nthReturnedWith: 'toHaveNthReturnedWith',
    toThrowError: 'toThrow'
  };

  source.find(j.CallExpression, {
    callee: {
      object: {
        callee: {
          name: 'expect'
        }
      },
      property: {
        name: name => Object.keys(matcherMap).includes(name)
      }
    }
  }).forEach(path => {
    const oldName = path.node.callee.property.name;
    path.node.callee.property.name = matcherMap[oldName];
  });

  return source.toSource(options.printOptions);
}