Refactor GF3 L1A to L2 pipeline

tests/test_metadata.py

@@ -0,0 +1,19 @@
+import math
+import unittest
+from pathlib import Path
+
+from gf3_l1a2l2.metadata import read_calibration_metadata
+
+
+class MetadataTests(unittest.TestCase):
+    def test_reads_named_calibration_values(self):
+        path = Path(__file__).parent / "fixtures" / "sample.meta.xml"
+        metadata = read_calibration_metadata(path)
+
+        self.assertEqual(metadata.for_polarization("HH").qualify_value, 1.0)
+        self.assertEqual(metadata.for_polarization("HV").calibration_const, 20.0)
+        self.assertTrue(math.isnan(metadata.for_polarization("VH").qualify_value))
+
+
+if __name__ == "__main__":
+    unittest.main()