Changeset 18087 for branches/2521_ProblemRefactoring/HeuristicLab.Tests/HeuristicLab.Problems.DataAnalysis.Symbolic-3.4/SymbolicDataAnalysisExpressionTreeSimplifierTest.cs

Timestamp:

11/19/21 16:16:54 (3 years ago)

Author:

mkommend

Message:

#2521: Merged latest trunk changes part II.

Location:

branches/2521_ProblemRefactoring

Files:

• . (modified) (1 prop)
• HeuristicLab.Tests (modified) (1 prop)
• HeuristicLab.Tests/HeuristicLab.Problems.DataAnalysis.Symbolic-3.4/SymbolicDataAnalysisExpressionTreeSimplifierTest.cs (modified) (2 diffs)

branches/2521_ProblemRefactoring/HeuristicLab.Tests/HeuristicLab.Problems.DataAnalysis.Symbolic-3.4/SymbolicDataAnalysisExpressionTreeSimplifierTest.cs

@@ -99 +99 @@
       #region root rules
       // cancellation
-      AssertEqualAfterSimplification("(root (variable 2.0 a) 0.0)", "1.0");
+      AssertEqualAfterSimplification("(root (variable 2.0 a) 0.0)", "NaN");
       // fixed point
       AssertEqualAfterSimplification("(root (variable 2.0 a) 1.0)", "(variable 2.0 a)");
@@ -269 +269 @@
 
       #endregion
+
+      #region do not drop subtrees with small weights
+      AssertEqualAfterSimplification("(* 1e-14 (variable 1.0 a))", "(variable 1e-14 a)");
+      AssertEqualAfterSimplification("(+ (variable 1.0 a) 1e-14)", 
+                                     "(+ (variable 1.0 a) 1e-14)");
+      // a scenario where a term with small weight can have large effect
+      AssertEqualAfterSimplification("(+ (* (pow (variable 1.0 a) 10) 1e-14) 1.0)",
+                                     "(+ (* (pow (variable 1.0 a) 10) 1e-14) 1.0)");
+      // a test case (from ticket #2985)
+      AssertEqualAfterSimplification("(+ (* (exp (variable 3.5861E+001 a)) 5.5606E-016) 5.9323E-002)",
+                                     "(+ (* (exp (variable 3.5861E+001 a)) 5.5606E-016) 5.9323E-002)");
+      #endregion
     }