TST: fixes test that checks coordinate systems

tests/test_rocket.py

@@ -51,7 +51,7 @@ def test_coordinate_system_orientation(
         burn_time=3.9,
         dry_mass=1.815,
         dry_inertia=(0.125, 0.125, 0.002),
-        center_of_dry_mass_position=0.317,
+        center_of_dry_mass_position=-0.317,
         nozzle_position=0,
         grain_number=5,
         grain_density=1815,
@@ -60,7 +60,7 @@ def test_coordinate_system_orientation(
         grain_separation=5 / 1000,
         grain_outer_radius=33 / 1000,
         grain_initial_height=120 / 1000,
-        grains_center_of_mass_position=0.397,
+        grains_center_of_mass_position=-0.397,
         grain_initial_inner_radius=15 / 1000,
         interpolation_method="linear",
         coordinate_system_orientation="combustion_chamber_to_nozzle",
@@ -81,7 +81,7 @@ def test_coordinate_system_orientation(
     rocket_tail_to_nose.aerodynamic_surfaces.add(calisto_nose_cone, 1.160)
     rocket_tail_to_nose.aerodynamic_surfaces.add(calisto_trapezoidal_fins, -1.168)
 
-    static_margin_tail_to_nose = rocket_tail_to_nose.static_margin(0)
+    static_margin_tail_to_nose = rocket_tail_to_nose.static_margin
 
     rocket_nose_to_tail = Rocket(
         radius=0.0635,
@@ -98,13 +98,9 @@ def test_coordinate_system_orientation(
     rocket_nose_to_tail.aerodynamic_surfaces.add(calisto_nose_cone, -1.160)
     rocket_nose_to_tail.aerodynamic_surfaces.add(calisto_trapezoidal_fins, 1.168)
 
-    static_margin_nose_to_tail = rocket_nose_to_tail.static_margin(0)
+    static_margin_nose_to_tail = rocket_nose_to_tail.static_margin
 
-    assert (
-        rocket_tail_to_nose.all_info() == None
-        or rocket_nose_to_tail.all_info() == None
-        or not abs(static_margin_tail_to_nose - static_margin_nose_to_tail) < 0.0001
-    )
+    assert np.array_equal(static_margin_tail_to_nose, static_margin_nose_to_tail)
 
 
 @patch("matplotlib.pyplot.show")