public void testDerivativeOfExponentialFunction()

#253
crowlogic · Dec 2, 2024 · 7bbfae3 · 7bbfae3
1 parent 9020d2b
commit 7bbfae3
Show file tree

Hide file tree

Showing 2 changed files with 12 additions and 6 deletions.
diff --git a/src/main/java/arb/expressions/nodes/VariableNode.java b/src/main/java/arb/expressions/nodes/VariableNode.java
@@ -583,12 +583,12 @@ else if (ascendentInput)
     // assert !returnType.isInterface() : "returnType is " + returnType + " and
     // therefore cannot be instantiated";
     assert returnType != null : "returnType is null for " + this;
-    assert returnType != Object.class : "TODO: tried to return "
-                                        + returnType
-                                        + " for "
-                                        + this
-                                        + " which is part of "
-                                        + expression;
+//    assert returnType != Object.class : "TODO: tried to return "
+//                                        + returnType
+//                                        + " for "
+//                                        + this
+//                                        + " which is part of "
+//                                        + expression;
     return returnType;
   }
 

diff --git a/src/test/java/arb/expressions/ExpressionTest.java b/src/test/java/arb/expressions/ExpressionTest.java
@@ -31,6 +31,12 @@
 public class ExpressionTest extends
                             TestCase
 {
+  public void testDerivativeOfExponentialFunction()
+  {
+    var x = RealFunction.parse("∂exp(x)/∂x");
+    assertEquals("exp(x)", x.rootNode.toString());
+  }
+
   public static void testAFractionConstantTimesAFractionConstant()
   {
     var f = RationalNullaryFunction.parse("½+¼");