test(itkwasm-image-io-wasi): add MetaImage test

packages/image-io/python/itkwasm-image-io-wasi/tests/test_metaimage.py

@@ -0,0 +1,52 @@
+from pathlib import Path
+
+from itkwasm_image_io_wasi import meta_read_image, meta_write_image
+
+from .common import test_input_path, test_output_path
+
+test_input_file_path = test_input_path / 'brainweb165a10f17.mha'
+test_output_file_path = test_output_path / 'meta-image-test-brainweb165a10f17.mha'
+
+def verify_image(image):
+    assert image.imageType.dimension == 3
+    assert image.imageType.componentType == "uint8"
+    assert image.imageType.pixelType == "Scalar"
+    assert image.imageType.components == 1
+    assert image.origin[0] == 0.0
+    assert image.origin[1] == 0.0
+    assert image.origin[2] == 0.0
+    assert image.spacing[0] == 1.0
+    assert image.spacing[1] == 1.0
+    assert image.spacing[2] == 1.0
+    assert image.direction[0, 0] == 1.0
+    assert image.direction[0, 1] == 0.0
+    assert image.direction[0, 2] == 0.0
+    assert image.direction[1, 0] == 0.0
+    assert image.direction[1, 1] == 1.0
+    assert image.direction[1, 2] == 0.0
+    assert image.direction[2, 0] == 0.0
+    assert image.direction[2, 1] == 0.0
+    assert image.direction[2, 2] == 1.0
+    assert image.size[0] == 181
+    assert image.size[1] == 217
+    assert image.size[2] == 180
+    assert image.data.ravel()[0] == 5
+    assert image.data.ravel()[1] == 8
+    assert image.data.ravel()[2] == 2
+
+def test_meta_read_image():
+    could_read, image = meta_read_image(test_input_file_path)
+    assert could_read
+    verify_image(image)
+
+def test_meta_write_image():
+    could_read, image = meta_read_image(test_input_file_path)
+    assert could_read
+
+    use_compression = False
+    could_write = meta_write_image(image, test_output_file_path, use_compression)
+    assert could_write
+
+    could_read, image = meta_read_image(test_output_file_path)
+    assert could_read
+    verify_image(image)