Added nodata attribute to the cultivated data class

Author: tebadi

tests/test_lc_l4_ctv.py

@@ -41,6 +41,7 @@ def image_groups(l34, urban, cultivated, woody, pv_pc_50):
         "cultivated_class": xr.DataArray(
             da.from_array(cultivated, chunks=(1, -1, -1)),
             dims=("spec", "y", "x"),
+            attrs={"nodata": 255},
         ),
         "woody_cover": xr.DataArray(
             da.from_array(woody, chunks=(1, -1, -1)),
@@ -129,14 +130,16 @@ def test_ctv_classes_woody():
 
     stats_l4 = StatsLccsLevel4()
     level3 = lc_level3.lc_level3(xx)
+
     lifeform = lc_lifeform.lifeform(xx)
     veg_cover = l4_veg_cover.canopyco_veg_con(xx, stats_l4.veg_threshold)
 
     l4_ctv = l4_cultivated.lc_l4_cultivated(
         xx.classes_l3_l4, level3, lifeform, veg_cover
     )
-    assert (l4_ctv.compute() == expected_cultivated_classes).all()
 
+    assert (l4_ctv.compute() == expected_cultivated_classes).all()
+ 
 
 def test_ctv_classes_herbaceous():