def test_add_traj_id_overwrite_raises_error(self):
gdf = self.geo_df.copy()
gdf[TRAJ_ID_COL_NAME] = "a"
collection = TrajectoryCollection(gdf, "id", obj_id_col="obj")
with pytest.raises(RuntimeError):
collection.add_traj_id()
class TestTrajectoryCollection:
def setup_method(self):
df = pd.DataFrame(
[
[1, "A",
Point(0, 0),
datetime(2018, 1, 1, 12, 0, 0), 9, "a"],
[1, "A",
Point(6, 0),
datetime(2018, 1, 1, 12, 6, 0), 5, "b"],
[1, "A",
Point(6, 6),
datetime(2018, 1, 1, 14, 10, 0), 2, "c"],
[1, "A",
Point(9, 9),
datetime(2018, 1, 1, 14, 15, 0), 4, "d"],
[
2, "A",
Point(10, 10),
datetime(2018, 1, 1, 12, 0, 0), 10, "e"
],
[
2, "A",
Point(16, 10),
datetime(2018, 1, 1, 12, 6, 0), 6, "f"
],
[
2, "A",
Point(16, 16),
datetime(2018, 1, 2, 13, 10, 0), 7, "g"
],
[
2, "A",
Point(190, 10),
datetime(2018, 1, 2, 13, 15, 0), 3, "h"
],
],
columns=["id", "obj", "geometry", "t", "val", "val2"],
).set_index("t")
self.geo_df = GeoDataFrame(df, crs=CRS_METRIC)
self.collection = TrajectoryCollection(self.geo_df,
"id",
obj_id_col="obj")
self.geo_df_latlon = GeoDataFrame(df, crs=CRS_LATLON)
self.collection_latlon = TrajectoryCollection(self.geo_df_latlon,
"id",
obj_id_col="obj")
def test_number_of_trajectories(self):
assert len(self.collection) == 2
def test_number_of_trajectories_min_length(self):
collection = TrajectoryCollection(self.geo_df,
"id",
obj_id_col="obj",
min_length=100)
assert len(collection) == 1
def test_number_of_trajectories_min_length_never_reached(self):
collection = TrajectoryCollection(self.geo_df,
"id",
obj_id_col="obj",
min_length=1000)
assert len(collection) == 0
def test_number_of_trajectories_min_duration(self):
collection = TrajectoryCollection(self.geo_df,
"id",
obj_id_col="obj",
min_duration=timedelta(days=1))
assert len(collection) == 1
def test_number_of_trajectories_min_duration_from_list(self):
collection = TrajectoryCollection(self.collection.trajectories,
min_duration=timedelta(days=1))
assert len(collection) == 1
def test_number_of_trajectories_min_duration_never_reached(self):
collection = TrajectoryCollection(self.geo_df,
"id",
obj_id_col="obj",
min_duration=timedelta(weeks=1))
assert len(collection) == 0
def test_get_trajectory(self):
assert self.collection.get_trajectory(1).id == 1
assert self.collection.get_trajectory(1).obj_id == "A"
assert self.collection.get_trajectory(2).id == 2
assert self.collection.get_trajectory(3) is None
def test_get_locations_at(self):
locs = self.collection.get_locations_at(datetime(2018, 1, 1, 12, 6, 0))
assert len(locs) == 2
assert locs.iloc[0].geometry in [Point(6, 0), Point(16, 10)]
assert locs.iloc[0].val in [5, 6]
assert locs.iloc[1].geometry in [Point(6, 0), Point(16, 10)]
assert locs.iloc[0].geometry != locs.iloc[1].geometry
def test_get_locations_at_needing_interpolation(self):
locs = self.collection.get_locations_at(datetime(2018, 1, 1, 12, 6, 1))
assert len(locs) == 2
assert locs.iloc[0].val in [5, 6]
def test_get_locations_at_out_of_time_range(self):
locs = self.collection.get_locations_at(datetime(2017, 1, 1, 12, 6, 1))
assert len(locs) == 0
def test_get_start_locations(self):
locs = self.collection.get_start_locations()
assert len(locs) == 2
assert locs.iloc[0].geometry in [Point(0, 0), Point(10, 10)]
assert locs.iloc[0].id in [1, 2]
assert locs.iloc[0].obj == "A"
assert locs.iloc[0].val in [9, 10]
assert locs.iloc[0].val2 in ["a", "e"]
assert locs.iloc[1].geometry in [Point(0, 0), Point(10, 10)]
assert locs.iloc[0].geometry != locs.iloc[1].geometry
assert isinstance(locs, GeoDataFrame)
def test_get_end_locations(self):
locs = self.collection.get_end_locations()
assert len(locs) == 2
assert locs.iloc[0].geometry in [Point(9, 9), Point(190, 10)]
assert locs.iloc[0].id in [1, 2]
assert locs.iloc[0].obj == "A"
assert locs.iloc[0].val in [4, 3]
assert locs.iloc[0].val2 in ["d", "h"]
assert locs.iloc[1].geometry in [Point(9, 9), Point(190, 10)]
assert locs.iloc[0].geometry != locs.iloc[1].geometry
assert isinstance(locs, GeoDataFrame)
def test_get_intersecting(self):
polygon = Polygon([(-1, -1), (-1, 1), (1, 1), (1, -1), (-1, -1)])
collection = self.collection.get_intersecting(polygon)
assert len(collection) == 1
assert collection.trajectories[0] == self.collection.trajectories[0]
def test_clip(self):
polygon = Polygon([(-1, -1), (-1, 1), (1, 1), (1, -1), (-1, -1)])
collection = self.collection.clip(polygon)
assert len(collection) == 1
assert collection.trajectories[0].to_linestring(
).wkt == "LINESTRING (0 0, 1 0)"
def test_filter(self):
assert len(self.collection.filter("obj", "A")) == 2
assert len(self.collection.filter("obj", ["A"])) == 2
assert len(self.collection.filter("obj", ["B"])) == 0
assert len(self.collection.filter("obj", [1])) == 0
def test_get_min_and_max(self):
assert self.collection.get_min("val") == 2
assert self.collection.get_max("val") == 10
def test_plot_exists(self):
from matplotlib.axes import Axes
result = self.collection.plot()
assert isinstance(result, Axes)
def test_hvplot_exists(self):
import holoviews
result = self.collection_latlon.hvplot()
assert isinstance(result, holoviews.core.overlay.Overlay)
def test_plot_exist_column(self):
from matplotlib.axes import Axes
result = self.collection.plot(column="val")
assert isinstance(result, Axes)
def test_plot_speed_not_altering_collection(self):
self.collection.plot(column="speed")
assert all([
"speed" not in traj.df.columns.values
for traj in self.collection.trajectories
])
def test_traj_with_less_than_two_points(self):
df = pd.DataFrame(
[[1, "A",
Point(0, 0),
datetime(2018, 1, 1, 12, 0, 0), 9, "a"]],
columns=["id", "obj", "geometry", "t", "val", "val2"],
).set_index("t")
geo_df = GeoDataFrame(df, crs=CRS_METRIC)
tc = TrajectoryCollection(geo_df, "id", obj_id_col="obj")
assert len(tc) == 0
def test_traj_with_two_points_at_the_same_time(self):
df = pd.DataFrame(
[
[1, "A",
Point(0, 0),
datetime(2018, 1, 1, 12, 0, 0), 9, "a"],
[1, "A",
Point(0, 0),
datetime(2018, 1, 1, 12, 0, 0), 9, "a"],
],
columns=["id", "obj", "geometry", "t", "val", "val2"],
).set_index("t")
geo_df = GeoDataFrame(df, crs=CRS_METRIC)
tc = TrajectoryCollection(geo_df, "id", obj_id_col="obj")
assert len(tc) == 0
def test_iteration(self):
assert sum([1 for _ in self.collection]) == len(self.collection)
def test_iteration_error(self):
def filter_trajectory(trajectory):
trajectory.df = trajectory.df[trajectory.df["val"] >= 7]
return trajectory
trajs = [filter_trajectory(traj) for traj in self.collection]
lengths = (1, 2)
for i, traj in enumerate(trajs):
assert len(traj.df) == lengths[i]
collection = copy(self.collection)
collection.trajectories = trajs
with pytest.raises(ValueError):
for _ in collection:
pass
def test_add_traj_id(self):
self.collection.add_traj_id()
result1 = self.collection.trajectories[0].df[TRAJ_ID_COL_NAME].tolist()
assert result1 == [1, 1, 1, 1]
result2 = self.collection.trajectories[1].df[TRAJ_ID_COL_NAME].tolist()
assert result2 == [2, 2, 2, 2]
def test_add_traj_id_overwrite_raises_error(self):
gdf = self.geo_df.copy()
gdf[TRAJ_ID_COL_NAME] = "a"
collection = TrajectoryCollection(gdf, "id", obj_id_col="obj")
with pytest.raises(RuntimeError):
collection.add_traj_id()
def test_to_point_gdf(self):
point_gdf = self.collection.to_point_gdf()
point_gdf.to_file("temp.gpkg", layer="points", driver="GPKG")
assert_frame_equal(point_gdf, self.geo_df)
def test_to_line_gdf(self):
temp_df = self.geo_df.drop(columns=["obj", "val", "val2"])
tc = TrajectoryCollection(temp_df, "id")
line_gdf = tc.to_line_gdf()
line_gdf.to_file("temp.gpkg", layer="lines", driver="GPKG")
t1 = [
datetime(2018, 1, 1, 12, 0),
datetime(2018, 1, 1, 12, 6),
datetime(2018, 1, 1, 14, 10),
datetime(2018, 1, 1, 14, 15),
]
t2 = [
datetime(2018, 1, 1, 12, 0, 0),
datetime(2018, 1, 1, 12, 6, 0),
datetime(2018, 1, 2, 13, 10, 0),
datetime(2018, 1, 2, 13, 15, 0),
]
df2 = pd.DataFrame(
[
[1, t1[1], t1[0],
LineString([(0, 0), (6, 0)])],
[1, t1[2], t1[1],
LineString([(6, 0), (6, 6)])],
[1, t1[3], t1[2],
LineString([(6, 6), (9, 9)])],
[2, t2[1], t2[0],
LineString([(10, 10), (16, 10)])],
[2, t2[2], t2[1],
LineString([(16, 10), (16, 16)])],
[2, t2[3], t2[2],
LineString([(16, 16), (190, 10)])],
],
columns=["id", "t", "prev_t", "geometry"],
)
expected_line_gdf = GeoDataFrame(df2, crs=CRS_METRIC)
assert_frame_equal(line_gdf, expected_line_gdf)
def test_to_traj_gdf(self):
temp_df = self.geo_df.drop(columns=["obj", "val", "val2"])
tc = TrajectoryCollection(temp_df, "id")
traj_gdf = tc.to_traj_gdf()
traj_gdf.to_file("temp.gpkg", layer="trajs", driver="GPKG")
rows = [
{
"traj_id": 1,
"start_t": datetime(2018, 1, 1, 12, 0, 0),
"end_t": datetime(2018, 1, 1, 14, 15, 0),
"geometry": LineString([(0, 0), (6, 0), (6, 6), (9, 9)]),
"length": 12 + sqrt(18),
"direction": 45.0,
},
{
"traj_id": 2,
"start_t": datetime(2018, 1, 1, 12, 0, 0),
"end_t": datetime(2018, 1, 2, 13, 15, 0),
"geometry": LineString([(10, 10), (16, 10), (16, 16),
(190, 10)]),
"length": 12 + sqrt(174 * 174 + 36),
"direction": 90.0,
},
]
df2 = pd.DataFrame(rows)
expected_line_gdf = GeoDataFrame(df2, crs=CRS_METRIC)
assert_frame_equal(traj_gdf, expected_line_gdf)