测试人偶自定义函数 NoMethodError: 未定义方法 'check_file'

如何解决测试人偶自定义函数 NoMethodError: 未定义方法 'check_file'

我有一个自定义的 Puppet 函数，它接受一个文件，检查文件的内容并根据内容返回一个哈希值：

Puppet::Functions.create_function(:check_file) do
  dispatch :check_file do
    param 'String',:file_path
  end

  def check_file(file_path)
    data = Hash.new
    ...
    ...
    return data
  end
end

为了测试上述内容，我使用了以下代码段：

describe 'check_file' do

  tempfile = Tempfile.new('dummy_file_name.txt')
  tempfile.write('dummy_file_content')
  expected_hash = {'abc' => 'def','ghi' => 'jkl'}

  result = check_file('dummy_file_name.txt')
  expect(result).to eq(expected_hash)
end

但我收到以下错误：

An error occurred while loading ./spec/functions/check_file_spec.rb.
Failure/Error: result = check_file('dummy_file_name.txt')

NoMethodError:
  undefined method `check_file' for RSpec::ExampleGroups::CheckFile:Class
# ./spec/functions/check_file.rb:81:in `block in <top (required)>'
# ./spec/functions/check_file_spec.rb:74:in `<top (required)>'
No examples found.

Finished in 0.00002 seconds (files took 1.94 seconds to load)
0 examples,0 failures,1 error occurred outside of examples

知道为什么 rspec 无法找到我的方法吗？

目录结构为：

module/lib/puppet/functions/check_file.rb
module/spec/functions/check_file_spec.rb