[WIP] add test for AerodynamicSurface

tests/Components/test_AerodynamicSurface.py

@@ -0,0 +1,59 @@
+import attr
+from vec import Vector2
+import math
+import numpy.testing as npt
+import pytest
+from adr.World import Ambient
+from adr.Components import FreeBody, AttachedComponent
+from adr.Components.Aerodynamic import AerodynamicSurface
+
+
+env = Ambient()
+plane = FreeBody(
+    name='freebody',
+    type='generic_freebody',
+    mass=23.4,
+    angle=8.0,
+    velocity=Vector2(5.0, 2.0),
+    position_cg=Vector2(-0.2, 0.02),
+    pitch_rot_inertia=5.2,
+    ambient=env,
+)
+
+
+@pytest.fixture
+def aerodynamic_surface():
+    aerodynamic_surface = AerodynamicSurface(
+        name='aerodynamic_surface',
+        relative_position=Vector2(x=0.0, y=0.1),
+        relative_angle=math.radians(0),
+        mass=0.9,
+        span=0.30,
+        chord=0.4
+    )
+    aerodynamic_surface.set_parent(plane)
+    return aerodynamic_surface
+
+
+def test_aerodynamic_surface(aerodynamic_surface):
+    assert (aerodynamic_surface.name ==
+            'aerodynamic_surface')
+    assert (aerodynamic_surface.span == 0.30)
+    assert (aerodynamic_surface.chord == 0.4)
+    assert (aerodynamic_surface.mass == 0.9)
+
+
+def test_area(aerodynamic_surface):
+    assert(aerodynamic_surface.area == -1)
+
+
+def test_mean_aerodynamic_chord(aerodynamic_surface):
+    assert(aerodynamic_surface.mean_aerodynamic_chord == -1)
+
+
+def test_aerodynamic_center(aerodynamic_surface):
+    assert(aerodynamic_surface.aerodynamic_center == -1)
+
+
+def test_get_lift(aerodynamic_surface):
+    assert(aerodynamic_surface.get_lift() ==)