tests: add unit tests for bullet bam serializability

tests/bullet/test_bullet_bam.py

@@ -0,0 +1,133 @@
+import pytest
+
+# Skip these tests if we can't import bullet.
+bullet = pytest.importorskip("panda3d.bullet")
+from panda3d import core
+
+
+def reconstruct(object):
+    # Create a temporary buffer, which we first write the object into, and
+    # subsequently read it from again.
+    buffer = core.DatagramBuffer()
+
+    writer = core.BamWriter(buffer)
+    writer.init()
+    writer.write_object(object)
+
+    reader = core.BamReader(buffer)
+    reader.init()
+    object = reader.read_object()
+    reader.resolve()
+    return object
+
+
+def test_box_shape():
+    shape = bullet.BulletBoxShape((1, 2, 3))
+    shape.margin = 0.5
+
+    shape2 = reconstruct(shape)
+
+    assert type(shape) is type(shape2)
+    assert shape.margin == shape2.margin
+    assert shape.name == shape2.name
+    assert shape.half_extents_without_margin == shape2.half_extents_without_margin
+    assert shape.half_extents_with_margin == shape2.half_extents_with_margin
+
+
+def test_capsule_shape():
+    shape = bullet.BulletCapsuleShape(1.4, 3.5, bullet.Y_up)
+    shape.margin = 0.5
+
+    shape2 = reconstruct(shape)
+
+    assert type(shape) is type(shape2)
+    assert shape.margin == shape2.margin
+    assert shape.name == shape2.name
+    assert shape.radius == shape2.radius
+    assert shape.height == shape2.height
+
+
+def test_cone_shape():
+    shape = bullet.BulletConeShape(1.4, 3.5, bullet.Y_up)
+    shape.margin = 0.5
+
+    shape2 = reconstruct(shape)
+
+    assert type(shape) is type(shape2)
+    assert shape.margin == shape2.margin
+    assert shape.name == shape2.name
+    assert shape.radius == shape2.radius
+    assert shape.height == shape2.height
+
+
+def test_cylinder_shape():
+    shape = bullet.BulletCylinderShape(1.4, 3.5, bullet.Y_up)
+    shape.margin = 0.5
+
+    shape2 = reconstruct(shape)
+
+    assert type(shape) is type(shape2)
+    assert shape.margin == shape2.margin
+    assert shape.name == shape2.name
+    assert shape.radius == shape2.radius
+    assert shape.half_extents_without_margin == shape2.half_extents_without_margin
+    assert shape.half_extents_with_margin == shape2.half_extents_with_margin
+
+
+def test_minkowski_sum_shape():
+    box = bullet.BulletBoxShape((1, 2, 3))
+    sphere = bullet.BulletSphereShape(2.0)
+
+    shape = bullet.BulletMinkowskiSumShape(box, sphere)
+    shape.transform_a = core.TransformState.make_pos((8, 7, 3))
+    shape.transform_b = core.TransformState.make_hpr((45, -10, 110))
+    shape.margin = 0.5
+
+    shape2 = reconstruct(shape)
+
+    assert type(shape) is type(shape2)
+    assert shape.margin == shape2.margin
+    assert shape.name == shape2.name
+    assert shape.transform_a.compare_to(shape2.transform_a, True) == 0
+    assert shape.transform_b.compare_to(shape2.transform_b, True) == 0
+    assert type(shape.shape_a) == type(shape2.shape_a)
+    assert type(shape.shape_b) == type(shape2.shape_b)
+
+
+def test_multi_sphere_shape():
+    shape = bullet.BulletMultiSphereShape([(1, 2, 3), (4, 5, 6)], [1.5, 2.5])
+    shape.margin = 0.5
+
+    shape2 = reconstruct(shape)
+
+    assert type(shape) is type(shape2)
+    assert shape.margin == shape2.margin
+    assert shape.name == shape2.name
+    assert shape.sphere_count == shape2.sphere_count
+    assert tuple(shape.sphere_pos) == tuple(shape2.sphere_pos)
+    assert tuple(shape.sphere_radius) == tuple(shape2.sphere_radius)
+
+
+def test_plane_shape():
+    shape = bullet.BulletPlaneShape((1.2, 0.2, 0.5), 2.5)
+    shape.margin = 0.5
+
+    shape2 = reconstruct(shape)
+
+    assert type(shape) is type(shape2)
+    assert shape.margin == shape2.margin
+    assert shape.name == shape2.name
+    assert shape.plane_normal == shape2.plane_normal
+    assert shape.plane_constant == shape2.plane_constant
+
+
+def test_sphere_shape():
+    shape = bullet.BulletSphereShape(1.4)
+    shape.margin = 0.5
+
+    shape2 = reconstruct(shape)
+
+    assert type(shape) is type(shape2)
+    assert shape.margin == shape2.margin
+    assert shape.name == shape2.name
+    assert shape.radius == shape2.radius