tests: test the json module

conda-recipe/meta.yaml

@@ -28,6 +28,7 @@ test:
   requires:
     - pytest
     - pytest-cov
+    - numpy
 
   commands:
     - pytest -s --tb=native --cov=confiddler --pyargs confiddler.tests

confiddler/tests/test_json.py

@@ -0,0 +1,25 @@
+from io import StringIO
+from collections import UserDict, UserList
+
+import numpy as np
+
+import confiddler.json as json
+
+def test():
+    """
+    Our drop-in json replacement can encode custom
+    mappings and sequences, and also numpy arrays.
+    """
+    d = UserDict()
+    d['l'] = UserList([1,2,3])
+    d['a'] = np.arange(5)
+
+    f = StringIO()
+    json.dump(d, f)
+    f.seek(0)
+
+    assert json.load(f) == {'l': [1,2,3], 'a': [0,1,2,3,4]} 
+
+if __name__ == "__main__":
+    import pytest
+    pytest.main(['-s', '--tb=native', '--pyargs', 'confiddler.tests.test_json'])