Merge pull request #1298 from gnu-octave/laplace_test

Add a laplace transform test
gnu-octave · May 14, 2024 · ad3719c · ad3719c
2 parents 4849161 + ec9c2a8
commit ad3719c
Showing 1 changed file with 10 additions and 1 deletion.
diff --git a/inst/@sym/laplace.m b/inst/@sym/laplace.m
@@ -1,5 +1,5 @@
 %% Copyright (C) 2014-2016 Andrés Prieto
-%% Copyright (C) 2015-2016, 2019 Colin Macdonald
+%% Copyright (C) 2015-2016, 2019, 2024 Colin Macdonald
 %%
 %% This file is part of OctSymPy.
 %%
@@ -214,3 +214,12 @@
 %! % SymPy cannot evaluate? (Issue #170)
 %! syms s f(t)
 %! assert(logical( laplace(diff(f(t),t),t,s) == s*laplace(f(t),t,s)-f(0) ))
+
+%!test
+%! % https://github.com/gnu-octave/symbolic/issues/1295
+%! % fails on SymPy 1.10.* and 1.11.*
+%! if (pycall_sympy__ ('return Version(spver) >= Version("1.12")'))
+%!   syms t s
+%!   L = simplify (laplace (3*t*sin (4*t)));
+%!   assert (isAlways (L == 24*s / (s^2 + 16)^2))
+%! end