def test_diff_with_same_grid():
left = Grid(columns={"a": {}, "b": {}})
left.append({"a": 1, "b": 2})
left.append({"a": 3, "b": 4})
diff = grid_diff(left, left)
assert len(diff) == 0
assert grid_merge(left.copy(), diff) == left
def test_merge_timeseries_with_diff_ts_same_values():
destination = Grid(columns=["ts", "value"])
destination.append({
"ts": datetime(2020, 1, 1, 0, 0, 2, 0, tzinfo=pytz.UTC),
"value": 100
})
source = destination.copy()
result_grid = merge_timeseries(source, destination)
assert source == result_grid
def test_diff_with_no_column():
left = Grid(columns={"a": {}, "b": {}})
left.append({"a": 1, "b": 2})
left.append({"a": 3, "b": 4})
left.append({"a": 1, "b": 2})
left.append({"a": 1, "b": 2})
right = Grid()
diff = grid_diff(left, right)
assert len(diff) == 4
assert grid_merge(left.copy(), diff) == right
