Provide an alternative PDF previewer based on Poppler

mutool is licensed under the Affero GPL, which has strict distribution requirements.

Poppler is licensed under the more liberal GPL, making it a good alternative for those who can't use mutool.

2 files changed, 26 insertions, 3 deletions

diff --git a/activestorage/test/previewer/pdf_previewer_test.rb b/activestorage/test/previewer/mupdf_previewer_test.rb
index fe32f39be4..6c2db6fcbf 100644
--- a/activestorage/test/previewer/pdf_previewer_test.rb
+++ b/activestorage/test/previewer/mupdf_previewer_test.rb
@@ -3,15 +3,15 @@
 require "test_helper"
 require "database/setup"
 
-require "active_storage/previewer/pdf_previewer"
+require "active_storage/previewer/mupdf_previewer"
 
-class ActiveStorage::Previewer::PDFPreviewerTest < ActiveSupport::TestCase
+class ActiveStorage::Previewer::MuPDFPreviewerTest < ActiveSupport::TestCase
   setup do
     @blob = create_file_blob(filename: "report.pdf", content_type: "application/pdf")
   end
 
   test "previewing a PDF document" do
-    ActiveStorage::Previewer::PDFPreviewer.new(@blob).preview do |attachable|
+    ActiveStorage::Previewer::MuPDFPreviewer.new(@blob).preview do |attachable|
       assert_equal "image/png", attachable[:content_type]
       assert_equal "report.png", attachable[:filename]
 
diff --git a/activestorage/test/previewer/poppler_pdf_previewer_test.rb b/activestorage/test/previewer/poppler_pdf_previewer_test.rb
new file mode 100644
index 0000000000..2b41c8b642
--- /dev/null
+++ b/activestorage/test/previewer/poppler_pdf_previewer_test.rb
@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+require "test_helper"
+require "database/setup"
+
+require "active_storage/previewer/poppler_pdf_previewer"
+
+class ActiveStorage::Previewer::PopplerPDFPreviewerTest < ActiveSupport::TestCase
+  setup do
+    @blob = create_file_blob(filename: "report.pdf", content_type: "application/pdf")
+  end
+
+  test "previewing a PDF document" do
+    ActiveStorage::Previewer::PopplerPDFPreviewer.new(@blob).preview do |attachable|
+      assert_equal "image/png", attachable[:content_type]
+      assert_equal "report.png", attachable[:filename]
+
+      image = MiniMagick::Image.read(attachable[:io])
+      assert_equal 612, image.width
+      assert_equal 792, image.height
+    end
+  end
+end