Add simple test

Author: BSchilperoort

tests/test_regrid.py

@@ -0,0 +1,40 @@
+from pathlib import Path
+
+import pytest
+import xarray as xr
+
+import xarray_regrid
+
+DATA_PATH = Path(__file__).parent.parent / "benchmarks" / "data"
+
+CDO_DATA = {
+    "linear": DATA_PATH / "cdo_bilinear_64b.nc",
+    "nearest": DATA_PATH / "cdo_nearest_64b.nc",
+}
+
+@pytest.fixture
+def sample_input_data() -> xr.Dataset:
+    return xr.open_dataset(DATA_PATH / "era5_2m_dewpoint_temperature_2000_monthly.nc")
+
+@pytest.fixture
+def sample_grid_ds():
+    grid = xarray_regrid.Grid(
+        north=90,
+        east=180,
+        south=45,
+        west=90,
+        resolution_lat=0.17,
+        resolution_lon=0.17,
+    )
+
+    return xarray_regrid.create_regridding_dataset(grid)
+
+@pytest.mark.parametrize(
+    "method, cdo_file", [
+        ("linear", CDO_DATA["linear"]),
+        ("nearest", CDO_DATA["nearest"]),
+    ])
+def test_regridder(sample_input_data, sample_grid_ds, method, cdo_file):
+    ds_regrid = sample_input_data.regrid.regrid(sample_grid_ds, method=method)
+    ds_cdo = xr.open_dataset(cdo_file)
+    xr.testing.assert_allclose(ds_regrid.compute(), ds_cdo.compute())