Test opening many files

Tests/test_image.py

@@ -3,6 +3,7 @@
 import shutil
 import sys
 import tempfile
+from pathlib import Path
 
 import pytest
 
@@ -837,6 +838,59 @@ def test_fli_overrun2(self):
             except OSError as e:
                 assert str(e) == "buffer overrun when reading image file"
 
+    def change_image_res(
+        self,
+        rep_image,
+        max_image_thresh=49,
+        percent_reduce_res=[0.1, 0.2, 0.3, 0.4, 0.5],
+    ):
+
+        image_name = rep_image.name
+        save_all = True if rep_image.suffix == ".tiff" else False
+
+        with open(rep_image, "rb") as f:
+            image = Image.open(f)
+
+            if (image.size[0] * image.size[1]) / 1000000 > max_image_thresh:
+                for res in percent_reduce_res:
+                    fixed_height = int(
+                        int((float(image.size[1])))
+                        - (res * int((float(image.size[1]))))
+                    )
+                    height_percent = fixed_height / float(image.size[1])
+                    width_size = int((float(image.size[0]) * float(height_percent)))
+                    if fixed_height * width_size / 1000000 < 50:
+                        image = image.resize(
+                            (width_size, fixed_height), Image.NEAREST
+                        )
+                        image.save(
+                            image_name,
+                            dpi=(300, 300),
+                            save_all=save_all,
+                        )
+                        break
+            else:
+                image.save(
+                    f"{image_name}", dpi=(300, 300), save_all=save_all
+                )
+
+    def test_open_files(self):
+        test_images = list(Path("./input_images").glob("*"))
+
+        count = 0
+        original = Image.MAX_IMAGE_PIXELS
+        Image.MAX_IMAGE_PIXELS = None
+        while True:
+            for i in test_images:
+                self.change_image_res(rep_image=i)
+                count += 1
+                print(count)
+                if count == 1400:
+                    break
+            if count == 1400:
+                break
+        Image.MAX_IMAGE_PIXELS = original
+
 
 class MockEncoder:
     pass