def test_merge():
from datacube.model.utils import merge
assert merge(dict(a=1), dict(b=2)) == dict(a=1, b=2)
assert merge(dict(a=1, b=2), dict(b=2)) == dict(a=1, b=2)
with pytest.raises(Exception):
merge(dict(a=1, b=2), dict(b=3))
def test_merge_with_nan():
from datacube.model.utils import merge
_nan = float("nan")
assert _nan != _nan
xx = merge(dict(a=_nan), dict(a=_nan)) # <- fails here because of simple equality check
assert xx['a'] != xx['a']
