WIP #850: new FindFormulaTest.java; add necessary option to FindFormula

Author: axkr

symja_android_library/matheclipse-core/src/main/java/org/matheclipse/core/reflection/system/FindFormula.java

@@ -63,7 +63,6 @@ public int[] expectedArgSize(IAST ast) {
 
   @Override
   public void setUp(final ISymbol newSymbol) {
-    super.setUp(newSymbol);
-    // setOptions(newSymbol, S.GenerateConditions, S.False);
+    setOptions(newSymbol, S.TargetFunctions, S.All);
   }
 }

symja_android_library/matheclipse-core/src/test/java/org/matheclipse/core/system/FindFormulaTest.java

@@ -0,0 +1,49 @@
+package org.matheclipse.core.system;
+
+import org.junit.Test;
+import org.matheclipse.core.basic.Config;
+import org.matheclipse.core.eval.EvalEngine;
+
+/** Tests for FindFormula function */
+public class FindFormulaTest extends ExprEvaluatorTestCase {
+
+
+  @Test
+  public void testFindFormula() {
+    check("tt=Table({x, N(x * Sin(x))}, {x, 0, 4, .3});", //
+        "");
+    check(" FindFormula(tt,x)", //
+        "FindFormula(\n"
+            + "{{0.0,0.0},\n" //
+            + " {0.3,0.0886561},\n" //
+            + " {0.6,0.338785},\n" //
+            + " {0.9,0.704994},\n" //
+            + " {1.2,1.11845},\n" //
+            + " {1.5,1.49624},\n" //
+            + " {1.8,1.75293},\n" //
+            + " {2.1,1.81274},\n" //
+            + " {2.4,1.62111},\n" //
+            + " {2.7,1.15393},\n" //
+            + " {3.0,0.42336},\n" //
+            + " {3.3,-0.520561},\n" //
+            + " {3.6,-1.59307},\n" //
+        + " {3.9,-2.68229}},x)");
+
+  }
+
+
+  /** The JUnit setup method */
+  @Override
+  public void setUp() {
+    super.setUp();
+    Config.SHORTEN_STRING_LENGTH = 1024;
+    Config.MAX_AST_SIZE = 1000000;
+    EvalEngine.get().setIterationLimit(50000);
+  }
+
+  @Override
+  public void tearDown() throws Exception {
+    super.tearDown();
+    Config.SHORTEN_STRING_LENGTH = 80;
+  }
+}