hotfix: CI crash in test_power_chi2 [WIP] (#344)

* disable power_chi2 test

* Add back first test

* Add back second test

* Add third test

* "Effect size" is causing the failure!

* Fix segmentation error

pingouin/power.py

@@ -1058,7 +1058,7 @@ def _eval_w(w, n, power, alpha):
             return func(w, n, power, alpha) - power
 
         try:
-            return brenth(_eval_w, 1e-10, 1e07, args=(n, power, alpha))
+            return brenth(_eval_w, 1e-10, 100, args=(n, power, alpha))
         except ValueError:  # pragma: no cover
             return np.nan
 

pingouin/tests/test_power.py

@@ -235,20 +235,23 @@ def test_power_chi2(self):
         """Test function power_chi2.
         Values are compared to the pwr R package.
         """
-        w = 0.30
         # Power
         assert np.isclose(power_chi2(dof=1, w=0.3, n=20), 0.2686618)
         assert np.isclose(power_chi2(dof=2, w=0.3, n=100), 0.7706831)
+
         # Sample size
         assert np.isclose(power_chi2(dof=1, w=0.3, power=0.80), 87.20954)
         assert np.isclose(power_chi2(dof=3, w=0.3, power=0.80), 121.1396)
+
         # Effect size
         assert np.isclose(power_chi2(dof=4, n=50, power=0.80), 0.4885751)
         assert np.isclose(power_chi2(dof=1, n=50, power=0.80), 0.3962023)
+
         # Alpha
         assert np.isclose(
             power_chi2(dof=1, w=0.3, n=100, power=0.80, alpha=None), 0.03089736, atol=1e-03
         )
+
         # Error
         with pytest.raises(ValueError):
-            power_chi2(1, w=w)
+            power_chi2(1, w=0.3)