Adding unit tests files for kernels and initialisationmaps

tests/test_initialisationmaps.py

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+import plasticparcels as pp
+import parcels
+import pytest
+
+def make_simple_fieldset():
+    fieldset = parcels.FieldSet.from_data({'U': 0, 'V': 0}, {'lon': 0, 'lat': 0}, mesh='spherical')
+    return fieldset
+
+
+@pytest.mark.parametrize('maptype', ['coastal', 'rivers', 'fisheries', 'global_concentrations'])
+def test_maptypes(maptype):
+    settings = pp.utils.load_settings('docs/examples/example_Italy_coast_settings.json')
+    for key in settings["release_maps"]:
+        settings["release_maps"][key] = settings["release_maps"][key].replace("input_data", "docs/examples/input_data")
+    fieldset = make_simple_fieldset()
+
+    settings['release'] = {
+        'initialisation_type': maptype,
+        'country': 'Italy',
+    }
+
+    settings['plastictype'] = {  # TODO these should be defaults?
+        'wind_coefficient' : 0.01, # Percentage of wind to apply to particles
+        'plastic_diameter' : 0.001, # Plastic particle diameter (m)
+        'plastic_density' : 1030., # Plastic particle density (kg/m^3)
+    }
+
+    pset = pp.constructors.create_particleset_from_map(fieldset, settings)

tests/test_kernels.py

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+import plasticparcels as pp
+import parcels
+
+def make_simple_fieldset():
+    fieldset = parcels.FieldSet.from_data({'U': 0, 'V': 0}, {'lon': 0, 'lat': 0}, mesh='spherical')
+    return fieldset
+
+def test_kernels_options():
+    settings = pp.utils.load_settings('docs/examples/example_Italy_coast_settings.json')
+    fieldset = make_simple_fieldset()