Changeset 17796

Timestamp:

12/22/20 08:43:23 (3 years ago)

Author:

gkronber

Message:

#2985 add unit test cases to reproduce the problem

File:

• trunk/HeuristicLab.Tests/HeuristicLab.Problems.DataAnalysis.Symbolic-3.4/SymbolicDataAnalysisExpressionTreeSimplifierTest.cs (modified) (1 diff)

trunk/HeuristicLab.Tests/HeuristicLab.Problems.DataAnalysis.Symbolic-3.4/SymbolicDataAnalysisExpressionTreeSimplifierTest.cs

@@ -269 +269 @@
 
       #endregion
+
+      #region do not drop subtrees with small weights
+      AssertEqualAfterSimplification("(* 1e-14 (variable 1.0 a))", "(variable 1e-14 a)");
+      AssertEqualAfterSimplification("(+ 1e-14 (variable 1.0 a))", "(+ 1e-14 (variable 1.0 a))");
+      // a scenario where a term with small weight can have large effect
+      AssertEqualAfterSimplification("(+ (* 1e-14 (pow (variable 1.0 a) 10)) 1.0)", 
+                                     "(+ (* 1e-14 (pow (variable 1.0 a) 10)) 1.0)");
+      // a test case (from ticket #2985)
+      AssertEqualAfterSimplification("(+ 5.9323E-002 (* 5.5606E-016 (exp (variable 3.5861E+001 a))))",
+                                     "(+ 5.9323E-002 (* 5.5606E-016 (exp (variable 3.5861E+001 a))))");
+      #endregion
     }