From cd5ca1f80373fa7a57379f64a93d0b35c0299e99 Mon Sep 17 00:00:00 2001
From: Peter Boling <peter.boling@gmail.com>
Date: Mon, 24 Oct 2022 23:10:50 +0700
Subject: [PATCH 1/2] epub is an export format of Google Document

mimeType is "application/epub+zip"
---
 lib/google_drive/util.rb | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/google_drive/util.rb b/lib/google_drive/util.rb
index 9a445c08..2d5676c9 100644
--- a/lib/google_drive/util.rb
+++ b/lib/google_drive/util.rb
@@ -27,6 +27,7 @@ module Util
       '.htm' => 'text/html',
       '.html' => 'text/html',
       '.zip' => 'application/zip',
+      '.epub' => 'application/epub+zip',
       '.swf' => 'application/x-shockwave-flash'
     }.freeze
 

From dcdfd9e20b36ba877b926af0d5d4c5e01cff3978 Mon Sep 17 00:00:00 2001
From: y-bonfire <bonfirej7@gmail.com>
Date: Thu, 31 Jul 2025 09:00:31 +0900
Subject: [PATCH 2/2] export as epub test

---
 test/test_google_drive_export.rb | 34 ++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 test/test_google_drive_export.rb

diff --git a/test/test_google_drive_export.rb b/test/test_google_drive_export.rb
new file mode 100644
index 00000000..c19a209d
--- /dev/null
+++ b/test/test_google_drive_export.rb
@@ -0,0 +1,34 @@
+# test/test_google_drive_export.rb
+
+$LOAD_PATH.unshift(File.dirname(__FILE__) + '/../lib')
+require 'yaml'
+
+require 'rubygems'
+require 'bundler/setup'
+require 'highline'
+require 'test/unit'
+
+require 'google_drive'
+require_relative 'test_helper'
+
+class TestGoogleDriveExport < Test::Unit::TestCase
+  include(SessionHelper)
+
+  def test_upload_and_download
+    session = get_session
+    return unless auth_type == AuthType::USER_ACCOUNT
+    test_file_path = File.join(File.dirname(__FILE__), 'test_file.txt')
+    test_file_title = 'test_file_123.txt'
+    file = session.upload_from_file(
+      test_file_path, test_file_title, convert: true
+    )
+    assert { file.is_a?(GoogleDrive::File) }
+    assert { file.title == "test_file_123" }
+    assert { file.available_content_types == [] }
+    assert { file.mime_type == 'application/vnd.google-apps.document' }
+    download_path = File.join(File.dirname(__FILE__), 'sample-epub-file-dl.epub')
+    file.export_as_file(download_path)
+    assert { File.exist?(download_path) }
+    File.delete(download_path)
+  end
+end
\ No newline at end of file