draft mcidas testing

Tests/test_file_mcidas.py

@@ -1,17 +1,24 @@
+from __future__ import annotations
+
 import pytest
+
 from PIL import Image, McIdasImagePlugin
 
-def test_open_invalid_file():
+from .helper import assert_image_equal_tofile
-    # Arrange
+
+def test_invalid_file() -> None:
     invalid_file = "Tests/images/flower.jpg"
 
-    # Act & Assert
     with pytest.raises(SyntaxError):
         McIdasImagePlugin.McIdasImageFile(invalid_file)
 
-def test_open_supported_file():
+
+def test_valid_file() -> None:
     # Arrange
+    # https://ghrc.nsstc.nasa.gov/hydro/details/cmx3g8
+    # https://ghrc.nsstc.nasa.gov/pub/fieldCampaigns/camex3/cmx3g8/browse/
     test_file = "Tests/images/cmx3g8_wv_1998.260_0745_mcidas.ara"
+    saved_file = "Tests/images/cmx3g8_wv_1998.260_0745_mcidas.tiff"
 
     # Act
     with Image.open(test_file) as im:
@@ -21,37 +28,52 @@ def test_open_supported_file():
         assert im.format == "MCIDAS"
         assert im.mode == "I"
         assert im.size == (1800, 400)
+        assert_image_equal_tofile(im, saved_file)
 
-def test_open_mode_L():
-    # Arrange
-    test_file = "Tests/images/mcidas_mode_L.ara"
 
-    # Act
+def test_open_invalid_file() -> None:
+    invalid_file = "Tests/images/drawing_wmf_ref_144.png"
+
+    with pytest.raises(SyntaxError):
+        McIdasImagePlugin.McIdasImageFile(invalid_file)
+
+
+def test_open_8bit_file() -> None:
+    test_file = "Tests/images/8bit.s.tif"
+
     with Image.open(test_file) as im:
         im.load()
 
-        # Assert
         assert im.format == "MCIDAS"
         assert im.mode == "L"
-        assert im.size == (100, 100)
+        assert im.size == (800, 600)
 
-def test_open_mode_I_32B():
-    # Arrange
-    test_file = "Tests/images/mcidas_mode_I_32B.ara"
 
-    # Act
+def test_open_16bit_file() -> None:
+    test_file = "Tests/images/16_bit_binary_pgm.tiff"
+
     with Image.open(test_file) as im:
         im.load()
 
-        # Assert
         assert im.format == "MCIDAS"
         assert im.mode == "I"
-        assert im.size == (100, 100)
+        assert im.size == (1024, 768)
 
-def test_open_unsupported_format():
-    # Arrange
-    test_file = "Tests/images/mcidas_unsupported.ara"
 
-    # Act & Assert
+def test_open_32bit_file() -> None:
-    with pytest.raises(SyntaxError, match="unsupported McIdas format"):
+    test_file = "Tests/images/10ct_32bit_128.tiff"
+
+    with Image.open(test_file) as im:
+        im.load()
+
+        assert im.format == "MCIDAS"
+        assert im.mode == "I"
+        assert im.size == (1280, 1024)
+
+
+def test_open_unsupported_format() -> None:
+    test_file = "Tests/images/standard_embedded.png"
+
+    with pytest.raises(SyntaxError):
         McIdasImagePlugin.McIdasImageFile(test_file)
+