Add test for POST dset with zero chunk extent

Testing the issue reported in HDFGroup#192. This already passes,
so if this elicits the problem correctly, we can close that
issue without any further work.

tests/integ/attr_test.py

@@ -20,7 +20,6 @@ class AttributeTest(unittest.TestCase):
     def __init__(self, *args, **kwargs):
         super(AttributeTest, self).__init__(*args, **kwargs)
         self.base_domain = helper.getTestDomainName(self.__class__.__name__)
-        print(self.base_domain)
         self.endpoint = helper.getEndpoint()
         helper.setupDomain(self.base_domain)
 

tests/integ/dataset_test.py

@@ -2288,6 +2288,30 @@ def testExtendibleDatasetChunkPartitioning(self):
         self.assertTrue(chunk_size >= CHUNK_MIN)
         self.assertTrue(chunk_size <= CHUNK_MAX)
 
+    def testDatasetEmptyChunkExtent(self):
+        # Attempting to create 0-extent chunks should respond with Bad Request
+        domain = self.base_domain + "/testDatasetEmptyChunkExtent.h5"
+        helper.setupDomain(domain)
+        print("testDatasetEmptyChunkExtent", domain)
+        headers = helper.getRequestHeaders(domain=domain)
+        req = helper.getEndpoint() + "/"
+
+        # create the dataset
+        req = self.endpoint + "/datasets"
+
+        dims = [1]
+        payload = {"type": "H5T_IEEE_F32LE",
+                   "shape": dims}
+
+        payload["creationProperties"] = {
+            "layout": {"class": "H5D_CHUNKED", "dims": [0]}
+        }
+
+        req = self.endpoint + "/datasets"
+        rsp = self.session.post(req, data=json.dumps(payload), headers=headers)
+        # Should fail with Bad Request due to invalid layout value
+        self.assertEqual(rsp.status_code, 400)  # create dataset
+
 
 if __name__ == "__main__":
     # setup test files