WIP writing tests based on examples

tests/test_integration.py

@@ -0,0 +1,100 @@
+import numpy as np
+import pytest
+
+from brainrender import Scene
+from brainrender.actors import Points
+
+
+def get_n_points_in_region(region, N):
+    """
+    Gets N points inside (or on the surface) of a mes
+    """
+
+    region_bounds = region.mesh.bounds()
+    X = np.linspace(region_bounds[0], region_bounds[1], num=N)
+    Y = np.linspace(region_bounds[2], region_bounds[3], num=N)
+    Z = np.linspace(region_bounds[4], region_bounds[5], num=N)
+    pts = [[x, y, z] for x, y, z in zip(X, Y, Z)]
+
+    ipts = region.mesh.inside_points(pts).points()
+    return np.vstack(ipts)
+
+
+def check_bounds(bounds, parent_bounds):
+    """
+    Checks that the bounds of an actor are within the bounds of the root
+    """
+    for i, bound in enumerate(bounds):
+        if i % 2 == 0:
+            assert bound >= parent_bounds[i]
+        else:
+            assert bound <= parent_bounds[i]
+
+
+@pytest.fixture
+def scene():
+    scene = Scene(inset=False)
+    yield scene
+    del scene
+
+
+def test_scene_with_brain_region(scene):
+    brain_region = scene.add_brain_region(
+        "grey",
+        alpha=0.4,
+    )
+
+    bounds = brain_region.bounds()
+    root_bounds = scene.root.bounds()
+
+    assert scene.actors[1] == brain_region
+
+    check_bounds(bounds, root_bounds)
+
+
+def test_add_cells(scene):
+    mos = scene.add_brain_region("MOs", alpha=0.15)
+    coordinates = get_n_points_in_region(mos, 1000)
+    points = Points(coordinates, name="CELLS", colors="steelblue")
+
+    scene.add(points)
+
+    assert scene.actors[0] == scene.root
+    assert scene.actors[1] == mos
+    assert scene.actors[2] == points
+
+    scene.render(interactive=False)
+
+    root_bounds = scene.root.bounds()
+    region_bounds = mos.bounds()
+    points_bounds = points.bounds()
+
+    check_bounds(points_bounds, root_bounds)
+    check_bounds(region_bounds, root_bounds)
+
+
+def test_add_labels(scene):
+    th, mos = scene.add_brain_region("TH", "MOs")
+    scene.add_label(th, "TH")
+
+    scene.render(interactive=False)
+
+    assert scene.actors[1] == th
+    assert scene.actors[2] == mos
+    assert len(th.labels) == 2
+    assert len(mos.labels) == 0
+
+    th_label_text_bounds = th.labels[0].bounds()
+    th_label_bounds = th.labels[1].bounds()
+    root_bounds = scene.root.bounds()
+
+    check_bounds(th_label_text_bounds, root_bounds)
+    check_bounds(th_label_bounds, root_bounds)
+
+
+def test_add_mesh_from_file(scene, pytestconfig):
+    root_path = pytestconfig.rootpath
+    scene.add_brain_region("SCm", alpha=0.2)
+    scene.add(
+        root_path / "tests" / "files" / "CC_134_1_ch1inj.obj", color="tomato"
+    )