Marked tests as slow if they take more than 10 seconds to run on my computer. (#4577)

pytest reported these durations for the slowest tests.

669.59s call     tests/test_graphical_units/test_coordinate_systems.py::test_gradient_line_graph_x_axis
648.22s call     tests/test_graphical_units/test_coordinate_systems.py::test_gradient_line_graph_y_axis
192.45s call     tests/test_graphical_units/test_threed.py::test_Torus
53.81s call     tests/test_graphical_units/test_threed.py::test_Sphere
24.88s call     tests/module/mobject/mobject/test_mobject.py::test_mobject_dimensions_nested_mobjects
19.33s call     tests/test_graphical_units/test_coordinate_systems.py::test_plot_surface
14.16s call     tests/test_graphical_units/test_coordinate_systems.py::test_plot_surface_colorscale
10.49s call     tests/test_graphical_units/test_probability.py::test_default_chart
7.87s call     tests/test_graphical_units/test_numbers.py::test_set_value_with_updaters
6.57s call     tests/module/mobject/test_matrix.py::TestMatrix::test_get_columns[2x2]
6.30s call     tests/module/mobject/test_matrix.py::TestMatrix::test_get_columns[1x3]
5.64s call     tests/test_graphical_units/test_tables.py::test_Table
5.54s call     tests/test_graphical_units/test_axes.py::test_plot[False]
5.54s call     tests/module/mobject/test_matrix.py::TestMatrix::test_matrix_init_valid[2x2_numpy]
5.25s call     tests/test_graphical_units/test_img_and_svg.py::test_WeightSVG

tests/module/mobject/mobject/test_mobject.py

@@ -105,6 +105,7 @@ def is_close(x, y):
     return abs(x - y) < 0.00001
 
 
+@pytest.mark.slow
 def test_mobject_dimensions_nested_mobjects():
     vg = VGroup()
 

tests/test_graphical_units/test_coordinate_systems.py

@@ -1,5 +1,7 @@
 from __future__ import annotations
 
+import pytest
+
 from manim import *
 from manim.utils.testing.frames_comparison import frames_comparison
 
@@ -37,6 +39,7 @@ def test_line_graph(scene):
     scene.add(plane, first_line, second_line)
 
 
+@pytest.mark.slow
 @frames_comparison
 def test_plot_surface(scene):
     axes = ThreeDAxes(x_range=(-5, 5, 1), y_range=(-5, 5, 1), z_range=(-5, 5, 1))
@@ -57,6 +60,7 @@ def test_plot_surface(scene):
     scene.add(axes, trig_plane)
 
 
+@pytest.mark.slow
 @frames_comparison
 def test_plot_surface_colorscale(scene):
     axes = ThreeDAxes(x_range=(-3, 3, 1), y_range=(-3, 3, 1), z_range=(-5, 5, 1))
@@ -143,6 +147,7 @@ def test_number_plane_log(scene):
     scene.add(VGroup(plane1, plane2).arrange())
 
 
+@pytest.mark.slow
 @frames_comparison
 def test_gradient_line_graph_x_axis(scene):
     """Test that using `colorscale` generates a line whose gradient matches the y-axis"""
@@ -158,6 +163,7 @@ def test_gradient_line_graph_x_axis(scene):
     scene.add(axes, curve)
 
 
+@pytest.mark.slow
 @frames_comparison
 def test_gradient_line_graph_y_axis(scene):
     """Test that using `colorscale` generates a line whose gradient matches the y-axis"""

tests/test_graphical_units/test_probability.py

@@ -1,3 +1,5 @@
+import pytest
+
 from manim.constants import LEFT
 from manim.mobject.graphing.probability import BarChart
 from manim.mobject.text.tex_mobject import MathTex
@@ -7,6 +9,7 @@ from manim.utils.testing.frames_comparison import frames_comparison
 __module_test__ = "probability"
 
 
+@pytest.mark.slow
 @frames_comparison
 def test_default_chart(scene):
     pull_req = [54, 23, 47, 48, 40, 64, 112, 87]

tests/test_graphical_units/test_threed.py

@@ -1,5 +1,7 @@
 from __future__ import annotations
 
+import pytest
+
 from manim import *
 from manim.utils.testing.frames_comparison import frames_comparison
 
@@ -18,6 +20,7 @@ def test_Cube(scene: Scene) -> None:
     scene.add(Cube())
 
 
+@pytest.mark.slow
 @frames_comparison
 def test_Sphere(scene: Scene) -> None:
     scene.add(Sphere())
@@ -64,6 +67,7 @@ def test_Arrow3D(scene: Scene) -> None:
     scene.add(Arrow3D(resolution=16))
 
 
+@pytest.mark.slow
 @frames_comparison
 def test_Torus(scene: Scene) -> None:
     scene.add(Torus())