Support Tempfiles in file_upload creation requests

lib/stripe/file_upload.rb

@@ -1,3 +1,5 @@
+require 'tempfile'
+
 module Stripe
  class FileUpload < APIResource
  extend Stripe::APIOperations::Create
@@ -20,7 +22,7 @@ def self.create(params = {}, opts = {})
  # rest-client would accept a vanilla `File` for upload, but Faraday does
  # not. Support the old API by wrapping a `File` with an `UploadIO` object
  # if we're given one.
- if params[:file] && params[:file].is_a?(File)
+ if params[:file] && [File, Tempfile].any? {|klass| params[:file].is_a?(klass)}
  params[:file] = Faraday::UploadIO.new(params[:file], nil)
  end
 

test/stripe/file_upload_test.rb

@@ -31,7 +31,7 @@ class FileUploadTest < Test::Unit::TestCase
  assert file.is_a?(Stripe::FileUpload)
  end
 
- should "be creatable" do
+ should "be creatable with a File" do
  stub_request(:post, "#{Stripe.uploads_base}/v1/files")
  .with(headers: {
  "Content-Type" => /\A#{Faraday::Request::Multipart.mime_type}/,
@@ -46,6 +46,25 @@ class FileUploadTest < Test::Unit::TestCase
  assert file.is_a?(Stripe::FileUpload)
  end
 
+ should "be creatable with a Tempfile" do
+ stub_request(:post, "#{Stripe.uploads_base}/v1/files")
+ .with(headers: {
+ "Content-Type" => /\A#{Faraday::Request::Multipart.mime_type}/,
+ }) do |request|
+ request.body =~ /Hello world/
+ end.to_return(body: JSON.generate(FIXTURE))
+
+ tempfile = Tempfile.new("foo")
+ tempfile.write("Hello world")
+ tempfile.rewind
+
+ file = Stripe::FileUpload.create(
+ purpose: "dispute_evidence",
+ file: tempfile
+ )
+ assert file.is_a?(Stripe::FileUpload)
+ end
+
  should "be creatable with Faraday::UploadIO" do
  stub_request(:post, "#{Stripe.uploads_base}/v1/files")
  .with(headers: {