/*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF licenses this file to You under the Apache License, Version 2.0
    * (the "License"); you may not use this file except in compliance with
    * the License.  You may obtain a copy of the License at
    *
    *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.commons.scxml2.env.groovy;
  
  import org.apache.commons.scxml2.Context;
  import org.apache.commons.scxml2.Evaluator;
  import org.apache.commons.scxml2.SCXMLExpressionException;
  import org.apache.commons.scxml2.SCXMLSystemContext;
  import org.apache.commons.scxml2.StateConfiguration;
  import org.apache.commons.scxml2.Status;
  import org.apache.commons.scxml2.model.State;
  import org.junit.Assert;
  import org.junit.Before;
  import org.junit.Test;
  
  public class GroovyEvaluatorTest {
  
      private static final String BAD_EXPRESSION = ">";
      private Context ctx;
  
      @Before
      public void before() {
          ctx = new GroovyContext(new SCXMLSystemContext(new GroovyContext()), null);
      }
  
      @Test
      public void testEval() throws SCXMLExpressionException {
          Evaluator eval = new GroovyEvaluator();
          Assert.assertEquals(2, eval.eval(ctx, "1 + 1"));
      }
  
      @Test
      public void testPristine() throws SCXMLExpressionException {
          Evaluator eval = new GroovyEvaluator();
          Assert.assertTrue(eval.evalCond(ctx, "1 + 1 == 2"));
      }
  
      @Test
      public void testBuiltInFunctions() throws SCXMLExpressionException {
          Evaluator eval = new GroovyEvaluator();
          StateConfiguration stateConfiguration = new StateConfiguration();
          Status status = new Status(stateConfiguration);
          ctx.getSystemContext().getPlatformVariables().put(SCXMLSystemContext.STATUS_KEY, status);
  
          State state1 = new State();
          state1.setId("state1");
          stateConfiguration.enterState(state1);
          Assert.assertTrue(eval.evalCond(ctx, "In('state1')"));
      }
  
      @Test
      public void testScript() throws SCXMLExpressionException {
          Evaluator eval = new GroovyEvaluator();
          ctx.set("x", 3);
          ctx.set("y", 0);
          String script = 
              "if ((x * 2) == 5) {" +
                  "y = 1;\n" +
              "} else {\n" +
                  "y = 2;\n" +
              "}";
          Assert.assertEquals(2, eval.evalScript(ctx, script));
          Assert.assertEquals(2, ctx.get("y"));
      }
  
      @Test
      public void testErrorMessage() {
          Evaluator eval = new GroovyEvaluator();
          Assert.assertNotNull(eval);
          try {
              eval.eval(ctx, BAD_EXPRESSION);
              Assert.fail("GroovyEvaluator should throw SCXMLExpressionException");
          } catch (SCXMLExpressionException e) {
              Assert.assertTrue("GroovyEvaluator: Incorrect error message",
                  e.getMessage().startsWith("eval('" + BAD_EXPRESSION + "'):"));
          }
      }
  
      @Test
      public void testPreprocessScript() {
          GroovyEvaluator evaluator = new GroovyEvaluator();
          Assert.assertEquals("x &&  x || x  !  x == x <  x <= x != x >  x >= x", evaluator.getScriptPreProcessor().
                  preProcess("x and x or x not x eq x lt x le x ne x gt x ge x"));
          Assert.assertEquals("and x OR x\n ! \nx\n== x < \nx(le)x ne. xgt x ge", evaluator.getScriptPreProcessor().
                   preProcess("and x OR x\nnot\nx\neq x lt\nx(le)x ne. xgt x ge"));
     }
 }