Test result of PDF output

[ebruchez]

We had recently a regression with older forms that did not use calculation dependencies. and could produce a PDF with missing fields. Enabling calculation dependencies addresses the problem.

This raises the question of automatically testing PDF output. In general, this is not easy, but we could at least extract the text of the PDF with PDFBox to check the textual content.

[ebruchez]

We had other regressions recently for automatic PDF (#6907) and PDF templates (#6900).

Tasks:

• simple test for automatic PDF
• simple test for PDF templates
• see if we can test the "calculation dependencies" regression mentioned above
  • don't see what we can do specifically for that: issue is more about testing a production form
• test header/footer configurations
• fix and test all fields for PDF template (for selection controls, make sure we can unambiguously check item labels)
  • Formatted Text Area
  • Explanatory Text
  • Date and Time
  • Dropdown Date
  • Fields Date
  • Dropdown
  • Dropdown with "Other"
  • Dropdown with Search
  • Dynamic Dropdown with Search
  • Radio Buttons
  • Radio Buttons with "Other"
  • Checkboxes
  • Scrollable Checkboxes
  • Single Checkbox
  • Yes/No Answer
  • Image Attachment
  • Handwritten Signature