Add tests

src/vector/v.rast.move/tests/conftest.py

@@ -0,0 +1,64 @@
+"""Setup dataset for v.rast.move test"""
+
+from types import SimpleNamespace
+
+import pytest
+
+import grass.script as gs
+
+LINES = """\
+VERTI:
+L  9 1
+ 0.0984456    0.61658031
+ 0.15025907   0.68264249
+ 0.2642487    0.76943005
+ 0.39119171   0.79792746
+ 0.52202073   0.80181347
+ 0.62953368   0.78367876
+ 0.68134715   0.73056995
+ 0.71243523   0.64637306
+ 0.73445596   0.54663212
+ 1     1
+L  8 1
+ 0.09455959   0.40544041
+ 0.31217617   0.40673575
+ 0.61917098   0.40932642
+ 0.75518135   0.41580311
+ 0.86658031   0.41580311
+ 0.86528497   0.35621762
+ 0.87305699   0.20595855
+ 0.87823834   0.08290155
+ 1     2
+"""
+
+
+@pytest.fixture(scope="module")
+def line_dataset(tmp_path_factory):
+    """Create a session and fill mapset with data"""
+    tmp_path = tmp_path_factory.mktemp("line_dataset")
+    location = "test"
+    lines_name = "lines"
+    gs.core._create_location_xy(tmp_path, location)  # pylint: disable=protected-access
+    with gs.setup.init(tmp_path / location):
+        gs.write_command(
+            "v.in.ascii", input="-", output=lines_name, stdin=LINES, format="standard"
+        )
+        gs.run_command("g.region", vector=lines_name, grow=0.1, res=0.01, flags="a")
+
+        x_name = "x"
+        y_name = "y"
+        x_value = 2.0
+        y_value = 5.3
+        nulls_name = "null_only"
+        gs.mapcalc(f"{x_name} = {x_value}")
+        gs.mapcalc(f"{y_name} = {y_value}")
+        gs.mapcalc(f"{nulls_name} = 0.0 + null()")
+
+        yield SimpleNamespace(
+            name=lines_name,
+            x=x_name,
+            y=y_name,
+            x_value=x_value,
+            y_value=y_value,
+            nulls=nulls_name,
+        )

src/vector/v.rast.move/tests/test_v_rast_move.py

@@ -0,0 +1,72 @@
+"""Test v.rast.move"""
+
+import pytest
+
+import grass.script as gs
+
+
+def test_displacement_result(line_dataset):
+    """Check geometry of the result"""
+    result = "result"
+    gs.run_command(
+        "v.rast.move",
+        input=line_dataset.name,
+        x_raster=line_dataset.x,
+        y_raster=line_dataset.y,
+        output=result,
+    )
+    old_metadata = gs.vector_info(line_dataset.name)
+    metadata = gs.vector_info(result)
+
+    for item in ["lines", "nodes"]:
+        assert old_metadata[item] == metadata[item]
+    assert metadata["north"] < line_dataset.y_value + 1
+    assert metadata["south"] > line_dataset.y_value
+    assert metadata["west"] > line_dataset.x_value
+    assert metadata["east"] < line_dataset.x_value + 1
+
+
+@pytest.mark.parametrize("nulls", ["zeros", "warning", "error"])
+def test_null_options_accepted(line_dataset, nulls):
+    """Check that all values for the nulls option are accepted"""
+    result = f"result_nulls_{nulls}"
+    gs.run_command(
+        "v.rast.move",
+        input=line_dataset.name,
+        x_raster=line_dataset.x,
+        y_raster=line_dataset.y,
+        output=result,
+        nulls=nulls,
+    )
+
+
+def test_nulls_as_zeros(line_dataset):
+    """Check that transforming nulls to zeros works"""
+    result = "result_zeros"
+    gs.run_command(
+        "v.rast.move",
+        input=line_dataset.name,
+        x_raster=line_dataset.nulls,
+        y_raster=line_dataset.nulls,
+        output=result,
+        nulls="zeros",
+    )
+    old_metadata = gs.vector_info(line_dataset.name)
+    metadata = gs.vector_info(result)
+
+    for item in ["lines", "nodes", "north", "south", "east", "west"]:
+        assert old_metadata[item] == metadata[item], item
+
+
+def test_nulls_fail(line_dataset):
+    """Check that an error is generated for nulls"""
+    result = "result_fails"
+    with pytest.raises(gs.CalledModuleError):
+        gs.run_command(
+            "v.rast.move",
+            input=line_dataset.name,
+            x_raster=line_dataset.nulls,
+            y_raster=line_dataset.nulls,
+            output=result,
+            nulls="error",
+        )