Add regression test

Closes sympy/sympy#22294
skirpichev · Oct 16, 2021 · 1cff70f · 1cff70f
1 parent e4cf168
commit 1cff70f
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diff --git a/diofant/tests/solvers/test_ode.py b/diofant/tests/solvers/test_ode.py
@@ -2979,3 +2979,13 @@ def test_sympyissue_9204():
 def test_sympyissue_22155():
     assert (dsolve(f(x).diff(x) - exp(f(x) - x)) ==
             Eq(f(x), x + log(-1/(exp(x)*C1 - 1))))
+
+
+def test_sympyissue_22294():
+    eq = Eq(f(x).diff(x) - f(x), x*f(x)**2)
+    assert 'Bernoulli' in classify_ode(eq)
+    assert dsolve(eq) == Eq(f(x), exp(x)/(exp(x)*(-x + 1) + C1))
+
+    eq = Eq(f(x).diff(x) - f(x), -x*f(x)**2)
+    assert 'Bernoulli' in classify_ode(eq)
+    assert dsolve(eq) == Eq(f(x), exp(x)/(exp(x)*(x - 1) + C1))
diff --git a/docs/release/notes-0.13.rst b/docs/release/notes-0.13.rst
@@ -138,3 +138,4 @@ These Sympy issues also were addressed:
 * :sympyissue:`22155`: Problem with solving simple separable ODE
 * :sympyissue:`22220`: Bug in the evaluation of a log limit
 * :sympyissue:`22248`: solve running forever
+* :sympyissue:`22294`: Bernoulli differential equation