test earthkit-hydro import

Author: Oisin-M

tests/environment-unit-tests.yml

@@ -15,3 +15,4 @@ dependencies:
   - earthkit-regrid>=0.4.0
   - earthkit-time>=0.1.7
   - earthkit-transforms>=0.3.4
+  - earthkit-hydro>=0.1.1

tests/test_import.py

@@ -43,3 +43,8 @@ def test_earthkit_time_import():
 def test_earthkit_transforms_import():
     import earthkit.transforms  # noqa
     from earthkit.transforms import aggregate  # noqa
+
+
+def test_earthkit_hydro_import():
+    import earthkit.hydro  # noqa
+    from earthkit.hydro import river_network  # noqa