Add evaluator tests checking that CodeGenParams work

src/test/scala/leon/test/evaluators/EvaluatorsTests.scala

@@ -434,4 +434,39 @@ class EvaluatorsTests extends LeonTestSuite {
       checkEvaluatorError(e, mkCall("c", IL(42)))
     }
   }
+
+  test("Infinite Recursion") {
+    import codegen._
+
+    val p = """|object Program {
+               |  import leon.Utils._
+               |
+               |  def c(i : Int) : Int = c(i-1)
+               |}
+               |""".stripMargin
+
+    implicit val prog = parseString(p)
+
+    val e = new CodeGenEvaluator(leonContext, prog, CodeGenParams(maxFunctionInvocations = 32))
+    checkEvaluatorError(e, mkCall("c", IL(42)))
+  }
+
+  test("Wrong Contracts") {
+    import codegen._
+
+    val p = """|object Program {
+               |  import leon.Utils._
+               |
+               |  def c(i : Int) : Int = {
+               |    require(i > 0);
+               |    c(i-1)
+               |  }
+               |}
+               |""".stripMargin
+
+    implicit val prog = parseString(p)
+
+    val e = new CodeGenEvaluator(leonContext, prog, CodeGenParams(checkContracts = true))
+    checkError(e, mkCall("c", IL(-42)))
+  }
 }