Python code to solve the diffusion equation in 2D

Please follow the instructions in python_testing_exercise.md.

Test logs (for submission)

pytest log

(base) axel@axel:~/Documents/SSE/GitHub/testing-python-exercise$ python -m pytest ============================= test session starts ============================== platform linux -- Python 3.8.8, pytest-6.2.5, py-1.11.0, pluggy-1.0.0 rootdir: /home/axel/Documents/SSE/GitHub/testing-python-exercise plugins: anyio-3.4.0 collected 5 items

tests/integration/test_diffusion2d.py .. [ 40%] tests/unit/test_diffusion2d_functions.py FFF [100%]

=================================== FAILURES =================================== ____________________________ test_initialize_domain ____________________________

def test_initialize_domain():
    """
    Check function SolveDiffusion2D.initialize_domain
    """
    solver = SolveDiffusion2D()
    w = 25.
    h = 4.
    dx = 0.5
    dy = 0.1
    expected_nx = 50
    expected_ny = 40
    solver.initialize_domain(w, h, dx, dy)

  np.testing.assert_equal(solver.nx, expected_nx)

E AssertionError: E Items are not equal: E ACTUAL: 8 E DESIRED: 50

tests/unit/test_diffusion2d_functions.py:22: AssertionError _____________________ test_initialize_physical_parameters ______________________

def test_initialize_physical_parameters():
    """
    Checks function SolveDiffusion2D.initialize_domain
    """
    solver = SolveDiffusion2D()
    d = 5.
    T_cold = 250.
    T_hot = 850.
    solver.dx = 0.5
    solver.dy = 0.1
    expected_dt = 9.6153846e-04
    solver.initialize_physical_parameters(d, T_cold, T_hot)

  np.testing.assert_almost_equal(solver.dt, expected_dt, decimal=6)

E AssertionError: E Arrays are not almost equal to 6 decimals E ACTUAL: 0.1 E DESIRED: 0.00096153846

tests/unit/test_diffusion2d_functions.py:38: AssertionError ----------------------------- Captured stdout call ----------------------------- dt = 0.1 __________________________ test_get_initial_condition __________________________

def test_get_initial_condition():
    """
    Checks function SolveDiffusion2D.get_initial_function
    """
    solver = SolveDiffusion2D()
    solver.T_cold = 250.
    solver.T_hot = 850.
    solver.nx = 3
    solver.ny = 4
    solver.dx = 2.5
    solver.dy = 1.6667

    u_expected = np.array([[250., 250., 250., 250.], [250., 250., 250., 250.], [250., 250., 850., 850.]])
    u_return = solver.get_initial_condition()

  np.testing.assert_almost_equal(u_return, u_expected)

E AssertionError: E Arrays are not almost equal to 7 decimals E
E Mismatched elements: 1 / 12 (8.33%) E Max absolute difference: 600. E Max relative difference: 0.70588235 E x: array([[250., 250., 250., 250.], E [250., 250., 250., 250.], E [250., 250., 850., 250.]]) E y: array([[250., 250., 250., 250.], E [250., 250., 250., 250.], E [250., 250., 850., 850.]])

tests/unit/test_diffusion2d_functions.py:55: AssertionError =========================== short test summary info ============================ FAILED tests/unit/test_diffusion2d_functions.py::test_initialize_domain - Ass... FAILED tests/unit/test_diffusion2d_functions.py::test_initialize_physical_parameters FAILED tests/unit/test_diffusion2d_functions.py::test_get_initial_condition ========================= 3 failed, 2 passed in 1.00s ==========================

unittest log

(base) axel@axel:~/Documents/SSE/GitHub/testing-python-exercise$ python -m pytest ============================= test session starts ============================== platform linux -- Python 3.8.8, pytest-6.2.5, py-1.11.0, pluggy-1.0.0 rootdir: /home/axel/Documents/SSE/GitHub/testing-python-exercise plugins: anyio-3.4.0 collected 5 items

tests/integration/test_diffusion2d.py .. [ 40%] tests/unit/test_diffusion2d_functions_unittest.py FFF [100%]

=================================== FAILURES =================================== _____________ TestDiffusion2DFunctions.test_get_initial_condition ______________

self = <test_diffusion2d_functions_unittest.TestDiffusion2DFunctions testMethod=test_get_initial_condition>

def test_get_initial_condition(self):
    """
    Checks function SolveDiffusion2D.get_initial_function
    """
    self.solver.T_cold = 250.
    self.solver.T_hot = 850.
    self.solver.nx = 3
    self.solver.ny = 4
    self.solver.dx = 2.5
    self.solver.dy = 1.6667

    u_expected = np.array([[250., 250., 250., 250.], [250., 250., 250., 250.], [250., 250., 850., 850.]])
    u_return = self.solver.get_initial_condition()

  np.testing.assert_almost_equal(u_return, u_expected)

E AssertionError: E Arrays are not almost equal to 7 decimals E
E Mismatched elements: 1 / 12 (8.33%) E Max absolute difference: 600. E Max relative difference: 0.70588235 E x: array([[250., 250., 250., 250.], E [250., 250., 250., 250.], E [250., 250., 850., 250.]]) E y: array([[250., 250., 250., 250.], E [250., 250., 250., 250.], E [250., 250., 850., 850.]])

tests/unit/test_diffusion2d_functions_unittest.py:55: AssertionError _______________ TestDiffusion2DFunctions.test_initialize_domain ________________

self = <test_diffusion2d_functions_unittest.TestDiffusion2DFunctions testMethod=test_initialize_domain>

def test_initialize_domain(self):
    """
    Check function SolveDiffusion2D.initialize_domain
    """
    w = 25.
    h = 4.
    dx = 0.5
    dy = 0.1
    expected_nx = 50
    expected_ny = 40
    self.solver.initialize_domain(w, h, dx, dy)

  np.testing.assert_equal(self.solver.nx, expected_nx)

E AssertionError: E Items are not equal: E ACTUAL: 8 E DESIRED: 50

tests/unit/test_diffusion2d_functions_unittest.py:24: AssertionError _________ TestDiffusion2DFunctions.test_initialize_physical_parameters _________

self = <test_diffusion2d_functions_unittest.TestDiffusion2DFunctions testMethod=test_initialize_physical_parameters>

def test_initialize_physical_parameters(self):
    """
    Checks function SolveDiffusion2D.initialize_domain
    """
    d = 5.
    T_cold = 250.
    T_hot = 850.
    self.solver.dx = 0.5
    self.solver.dy = 0.1
    expected_dt = 9.6153846e-04
    self.solver.initialize_physical_parameters(d, T_cold, T_hot)

  np.testing.assert_almost_equal(self.solver.dt, expected_dt, decimal=6)

E AssertionError: E Arrays are not almost equal to 6 decimals E ACTUAL: 0.1 E DESIRED: 0.00096153846

tests/unit/test_diffusion2d_functions_unittest.py:39: AssertionError ----------------------------- Captured stdout call ----------------------------- dt = 0.1 =========================== short test summary info ============================ FAILED tests/unit/test_diffusion2d_functions_unittest.py::TestDiffusion2DFunctions::test_get_initial_condition FAILED tests/unit/test_diffusion2d_functions_unittest.py::TestDiffusion2DFunctions::test_initialize_domain FAILED tests/unit/test_diffusion2d_functions_unittest.py::TestDiffusion2DFunctions::test_initialize_physical_parameters ========================= 3 failed, 2 passed in 0.92s ==========================

Integration test logs

(base) axel@axel:~/Documents/SSE/GitHub/testing-python-exercise$ python -m pytest tests/integration/ ============================= test session starts ============================== platform linux -- Python 3.8.8, pytest-6.2.5, py-1.11.0, pluggy-1.0.0 rootdir: /home/axel/Documents/SSE/GitHub/testing-python-exercise plugins: anyio-3.4.0 collected 2 items

tests/integration/test_diffusion2d.py FF [100%]

=================================== FAILURES =================================== _____________________ test_initialize_physical_parameters ______________________

def test_initialize_physical_parameters():
    """
    Checks function SolveDiffusion2D.initialize_domain
    """
    solver = SolveDiffusion2D()
    w = 25.
    h = 4.
    dx = 0.5
    dy = 0.1
    d = 5.
    T_cold = 250.
    T_hot = 850.
    expected_dt = 9.6153846e-04
    solver.initialize_domain(w, h, dx, dy)
    solver.initialize_physical_parameters(d, T_cold, T_hot)

  np.testing.assert_almost_equal(solver.dt, expected_dt)

E AssertionError: E Arrays are not almost equal to 7 decimals E ACTUAL: 0.1 E DESIRED: 0.00096153846

tests/integration/test_diffusion2d.py:24: AssertionError ----------------------------- Captured stdout call ----------------------------- dt = 0.1 __________________________ test_get_initial_condition __________________________

def test_get_initial_condition():
    """
    Checks function SolveDiffusion2D.get_initial_function
    """
    solver = SolveDiffusion2D()
    w = 10.
    h = 6.6668
    solver.T_cold = 250.
    solver.T_hot = 850.
    solver.nx = 3
    solver.ny = 4
    solver.dx = 2.5
    solver.dy = 1.6667

    u_expected = np.array([[250., 250., 250., 250.], [250., 250., 250., 250.], [250., 250., 850., 850.]])
    u_return = solver.get_initial_condition()

  np.testing.assert_almost_equal(u_return, u_expected)

E AssertionError: E Arrays are not almost equal to 7 decimals E
E Mismatched elements: 1 / 12 (8.33%) E Max absolute difference: 600. E Max relative difference: 0.70588235 E x: array([[250., 250., 250., 250.], E [250., 250., 250., 250.], E [250., 250., 850., 250.]]) E y: array([[250., 250., 250., 250.], E [250., 250., 250., 250.], E [250., 250., 850., 850.]])

tests/integration/test_diffusion2d.py:44: AssertionError =========================== short test summary info ============================ FAILED tests/integration/test_diffusion2d.py::test_initialize_physical_parameters FAILED tests/integration/test_diffusion2d.py::test_get_initial_condition - As... ============================== 2 failed in 0.93s ===============================

Citing

The code used in this exercise is based on Chapter 7 of the book "Learning Scientific Programming with Python".