Fixing the vonmises distribution tests in test_diffusion

.github/workflows/ci-workflow-integrationtests.yml

@@ -39,6 +39,10 @@ jobs:
     runs-on: windows-latest
     steps:
       - uses: actions/checkout@master
+      - name: Configure pagefile
+        uses: al-cheb/configure-pagefile-action@v1.2
+        with:
+          minimum-size: 8GB
       - name: Test Windows
         env:
           OS_NAME: win

.github/workflows/ci-workflow-unittests.yml

@@ -48,6 +48,10 @@ jobs:
     runs-on: windows-latest
     steps:
       - uses: actions/checkout@master
+      - name: Configure pagefile
+        uses: al-cheb/configure-pagefile-action@v1.2
+        with:
+          minimum-size: 8GB
       - name: Test Windows
         env:
           OS_NAME: win

tests/test_diffusion.py

@@ -143,6 +143,7 @@ def vonmises(particle, fieldset, time):
     angles = np.array([p.angle for p in pset])
 
     assert np.allclose(np.mean(angles), mu, atol=.1)
-    scipy_mises = stats.vonmises.rvs(kappa, loc=mu, size=10000)
-    assert np.allclose(np.mean(angles), np.mean(scipy_mises), atol=.1)
-    assert np.allclose(np.std(angles), np.std(scipy_mises), atol=.1)
+    vonmises_mean = stats.vonmises.mean(kappa=kappa, loc=mu)
+    assert np.allclose(np.mean(angles), vonmises_mean, atol=.1)
+    vonmises_var = stats.vonmises.var(kappa=kappa, loc=mu)
+    assert np.allclose(np.var(angles), vonmises_var, atol=.1)