ReaderChain and image reader

7 files changed, 258 insertions, 0 deletions

diff --git a/test/reader/image/__init__.py b/test/reader/image/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/test/reader/image/__init__.py
diff --git a/test/reader/image/load_nef.py b/test/reader/image/load_nef.py
new file mode 100644
index 0000000..5ba0adc
--- /dev/null
+++ b/test/reader/image/load_nef.py
@@ -0,0 +1,28 @@
+"""
+
+Part of the bsie test suite.
+A copy of the license is provided with the project.
+Author: Matthias Baumgartner, 2022
+"""
+# standard imports
+import os
+
+# external imports
+import requests
+
+# constants
+IMAGE_URL = 'http://igsor.net/eik7AhvohghaeN5.nef'
+
+## code ##
+
+def get():
+    """Download a raw test image."""
+    target = os.path.join(os.path.dirname(__file__), 'testimage.nef')
+    if not os.path.exists(target):
+        with open(target, 'wb') as ofile:
+            ans = requests.get(IMAGE_URL)
+            ofile.write(ans.content)
+
+
+
+## EOF ##
diff --git a/test/reader/image/test_image.py b/test/reader/image/test_image.py
new file mode 100644
index 0000000..c60ca75
--- /dev/null
+++ b/test/reader/image/test_image.py
@@ -0,0 +1,51 @@
+"""
+
+Part of the bsie test suite.
+A copy of the license is provided with the project.
+Author: Matthias Baumgartner, 2022
+"""
+# standard imports
+import importlib
+import os
+import unittest
+
+# bsie imports
+from bsie.utils import errors
+
+# objects to test
+from bsie.reader.image import Image
+
+
+## code ##
+
+class TestImage(unittest.TestCase):
+    def setUp(self):
+        importlib.import_module(__package__ + '.load_nef').get()
+
+    def test_construct(self):
+        image = Image({})
+        self.assertIsInstance(image, Image)
+        self.assertEqual(len(image._children), 2)
+
+    def test_call(self):
+        image = Image({})
+        # call returns raw image
+        img = image(os.path.join(os.path.dirname(__file__), 'testimage.nef'))
+        self.assertEqual(img.size, (6016, 4016)) # FIXME: change when image was replaced
+        img.close()
+        # call returns jpeg image
+        img = image(os.path.join(os.path.dirname(__file__), 'testimage.jpg'))
+        self.assertEqual(img.size, (1, 1))
+        img.close()
+        # call raises error if file cannot be read
+        self.assertRaises(errors.ReaderError, image,
+            os.path.join(os.path.dirname(__file__), 'invalid.nef'))
+        self.assertRaises(errors.ReaderError, image,
+            os.path.join(os.path.dirname(__file__), 'invalid.jpg'))
+
+## main ##
+
+if __name__ == '__main__':
+    unittest.main()
+
+## EOF ##
diff --git a/test/reader/image/test_pillow.py b/test/reader/image/test_pillow.py
new file mode 100644
index 0000000..8abf5c1
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+++ b/test/reader/image/test_pillow.py
@@ -0,0 +1,44 @@
+"""
+
+Part of the bsie test suite.
+A copy of the license is provided with the project.
+Author: Matthias Baumgartner, 2022
+"""
+# standard imports
+import os
+import unittest
+
+# external imports
+import PIL.Image
+
+# bsie imports
+from bsie.utils import errors
+
+# objects to test
+from bsie.reader.image._pillow import PillowImage
+
+
+## code ##
+
+class TestPillowImage(unittest.TestCase):
+    def test_call(self):
+        rdr = PillowImage()
+        # returns PIL image
+        img = rdr(os.path.join(os.path.dirname(__file__), 'testimage.jpg'))
+        self.assertEqual(img.size, (1, 1))
+        self.assertEqual(img.getdata().getpixel((0, 0)), (0, 0, 0))
+        img.close()
+        # raises exception when image cannot be read
+        self.assertRaises(errors.ReaderError, rdr,
+            os.path.join(os.path.dirname(__file__), 'invalid.jpg'))
+        # NOTE: PIL can actually read raw image files (returns the thumbnail)
+        #self.assertRaises(errors.ReaderError, rdr,
+        #    os.path.join(os.path.dirname(__file__), 'testimage.nef'))
+
+
+## main ##
+
+if __name__ == '__main__':
+    unittest.main()
+
+## EOF ##
diff --git a/test/reader/image/test_raw_image.py b/test/reader/image/test_raw_image.py
new file mode 100644
index 0000000..3d5f887
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+++ b/test/reader/image/test_raw_image.py
@@ -0,0 +1,50 @@
+"""
+
+Part of the bsie test suite.
+A copy of the license is provided with the project.
+Author: Matthias Baumgartner, 2022
+"""
+# standard imports
+import importlib
+import os
+import unittest
+
+# external imports
+import PIL.Image
+
+# bsie imports
+from bsie.utils import errors
+
+# objects to test
+from bsie.reader.image._raw import RawImage
+
+
+## code ##
+
+class TestRawImage(unittest.TestCase):
+    def setUp(self):
+        importlib.import_module(__package__ + '.load_nef').get()
+
+    def test_call(self):
+        rdr = RawImage()
+        # returns PIL image
+        img = rdr(os.path.join(os.path.dirname(__file__), 'testimage.nef'))
+        self.assertEqual(img.size, (6016, 4016)) # FIXME: change when image was replaced
+        #self.assertEqual(img.size, (1, 1))
+        #self.assertEqual(img.getdata().getpixel((0, 0)), (0, 0, 0))
+        img.close()
+        # raises exception when image cannot be read
+        self.assertRaises(errors.ReaderError, rdr,
+            os.path.join(os.path.dirname(__file__), 'invalid.nef'))
+        self.assertRaises(errors.ReaderError, rdr,
+            os.path.join(os.path.dirname(__file__), 'testimage.jpg'))
+
+
+
+
+## main ##
+
+if __name__ == '__main__':
+    unittest.main()
+
+## EOF ##
diff --git a/test/reader/image/testimage.jpg b/test/reader/image/testimage.jpg
new file mode 100644
index 0000000..ea7af63
--- /dev/null
+++ b/test/reader/image/testimage.jpg
diff --git a/test/reader/test_chain.py b/test/reader/test_chain.py
new file mode 100644
index 0000000..901faa1
--- /dev/null
+++ b/test/reader/test_chain.py
@@ -0,0 +1,85 @@
+"""
+
+Part of the bsie test suite.
+A copy of the license is provided with the project.
+Author: Matthias Baumgartner, 2022
+"""
+# standard imports
+import logging
+import os
+import unittest
+
+# bsie imports
+from bsie.utils import errors
+import bsie.reader.path
+import bsie.reader.stat
+
+# objects to test
+from bsie.reader.chain import ReaderChain
+
+
+## code ##
+
+class TestReaderChain(unittest.TestCase):
+    def test_construct(self):
+        # subreaders are built
+        chain = ReaderChain(['bsie.reader.stat.Stat', 'bsie.reader.path.Path'], {})
+        self.assertIsInstance(chain, ReaderChain)
+        self.assertEqual(chain._children,
+            (bsie.reader.stat.Stat(), bsie.reader.path.Path()))
+        # subreaders that failed to build are omitted
+        with self.assertLogs(logging.getLogger('bsie.reader.chain'), logging.WARNING):
+            chain = ReaderChain(['bsie.reader.stat.Stat', 'bsie.reader.invalid.Invalid'], {})
+            self.assertEqual(chain._children, (bsie.reader.stat.Stat(), ))
+        with self.assertLogs(logging.getLogger('bsie.reader.chain'), logging.WARNING):
+            chain = ReaderChain(['bsie.reader.stat.Stat', 'bsie.reader.path.Invalid'], {})
+            self.assertEqual(chain._children, (bsie.reader.stat.Stat(), ))
+        # warning is issued if there are no subreaders
+        with self.assertLogs(logging.getLogger('bsie.reader.chain'), logging.WARNING):
+            chain = ReaderChain([], {})
+            self.assertEqual(chain._children, tuple())
+
+    def test_essentials(self):
+        chain = ReaderChain(['bsie.reader.stat.Stat', 'bsie.reader.path.Path'], {})
+        # identity
+        self.assertEqual(chain, chain)
+        self.assertEqual(hash(chain), hash(chain))
+        # comparison works across instances
+        self.assertEqual(chain,
+            ReaderChain(['bsie.reader.stat.Stat', 'bsie.reader.path.Path'], {}))
+        self.assertEqual(hash(chain),
+            hash(ReaderChain(['bsie.reader.stat.Stat', 'bsie.reader.path.Path'], {})))
+        # comparison respects subreaders
+        self.assertNotEqual(hash(chain),
+            hash(ReaderChain(['bsie.reader.path.Path'], {})))
+        self.assertNotEqual(hash(chain),
+            hash(ReaderChain(['bsie.reader.path.Path'], {})))
+        # comparison respects subreader order
+        self.assertNotEqual(chain,
+            ReaderChain(['bsie.reader.path.Path', 'bsie.reader.stat.Stat'], {}))
+        self.assertNotEqual(hash(chain),
+            hash(ReaderChain(['bsie.reader.path.Path', 'bsie.reader.stat.Stat'], {})))
+        # string representation
+        self.assertEqual(str(chain), 'ReaderChain(Stat, Path)')
+        self.assertEqual(repr(chain), 'ReaderChain((Stat(), Path()))')
+
+    def test_call(self):
+        chain = ReaderChain(['bsie.reader.stat.Stat', 'bsie.reader.path.Path'], {})
+        # chain first probes first child
+        self.assertEqual(chain(__file__), os.stat(__file__))
+        # chain probes second child if first one failes
+        self.assertEqual(chain(''), '')
+        self.assertEqual(chain('missing-file'), 'missing-file')
+
+        # chain raises a ReaderError if childs were exhausted
+        chain = ReaderChain(['bsie.reader.stat.Stat'], {})
+        # chain probes second child if first one failes
+        self.assertRaises(errors.ReaderError, chain, '')
+
+
+## main ##
+
+if __name__ == '__main__':
+    unittest.main()
+
+## EOF ##