Bug in tesseract_noop spoof: produced wrong page sizes

Now checks input image to ensure the implied page size of its .hocr file
matches the rest of the PDF.

tests/spoof/tesseract_noop.py

@@ -1,6 +1,7 @@
 #!/usr/bin/env python3
 import sys
 import img2pdf
+from PIL import Image
 
 
 VERSION_STRING = '''tesseract 3.04.00
@@ -40,9 +41,12 @@ def main():
         print('List of available languages (1):\neng', file=sys.stderr)
         sys.exit(0)
     elif sys.argv[-1] == 'hocr':
+        inputf = sys.argv[-3]
         output = sys.argv[-2]
-        with open(output + '.hocr', 'w', encoding='utf-8') as f:
-            f.write(HOCR_TEMPLATE.format('1000', '1000'))
+        with Image.open(inputf) as im, \
+                open(output + '.hocr', 'w', encoding='utf-8') as f:
+            w, h = im.size
+            f.write(HOCR_TEMPLATE.format(str(w), str(h)))
     elif sys.argv[-1] == 'pdf':
         inputf = sys.argv[-3]
         output = sys.argv[-2]