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      1 /**
      2  * Copyright 2006-2017 the original author or authors.
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *     http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 package org.objenesis.tck;
     17 
     18 import static org.junit.Assert.*;
     19 
     20 import java.io.ByteArrayInputStream;
     21 import java.io.IOException;
     22 
     23 import org.junit.Before;
     24 import org.junit.Test;
     25 
     26 /**
     27  * @author Joe Walnes
     28  */
     29 public class CandidateLoaderTest {
     30 
     31    private StringBuilder recordedEvents;
     32    private CandidateLoader candidateLoader;
     33 
     34    @Before
     35    public void setUp() throws Exception {
     36 
     37       recordedEvents = new StringBuilder();
     38       TCK tck = new TCK() {
     39          @Override
     40          public void registerCandidate(Class<?> candidateClass, String description) {
     41             recordedEvents.append("registerCandidate('").append(candidateClass).append("', '")
     42                .append(description).append("')\n");
     43          }
     44       };
     45       CandidateLoader.ErrorHandler errorHandler = new CandidateLoader.ErrorHandler() {
     46          public void classNotFound(String name) {
     47             recordedEvents.append("classNotFound('").append(name).append("')\n");
     48          }
     49       };
     50 
     51       candidateLoader = new CandidateLoader(tck, getClass().getClassLoader(), errorHandler);
     52    }
     53 
     54    @Test
     55    public void testReadsClassesAndDescriptionsFromPropertiesFile() throws IOException {
     56       String input = "" + "org.objenesis.tck.CandidateLoaderTest$A = A candidate\n" + "\n"
     57          + "# a comment and some whitespace\n" + "\n"
     58          + "org.objenesis.tck.CandidateLoaderTest$B = B candidate\n"
     59          + "org.objenesis.tck.CandidateLoaderTest$C = C candidate\n";
     60 
     61       candidateLoader.loadFrom(new ByteArrayInputStream(input.getBytes()));
     62 
     63       assertEquals(""
     64          + "registerCandidate('class org.objenesis.tck.CandidateLoaderTest$A', 'A candidate')\n"
     65          + "registerCandidate('class org.objenesis.tck.CandidateLoaderTest$B', 'B candidate')\n"
     66          + "registerCandidate('class org.objenesis.tck.CandidateLoaderTest$C', 'C candidate')\n",
     67          recordedEvents.toString());
     68    }
     69 
     70    @Test
     71    public void testReportsMissingClassesToErrorHandler() throws IOException {
     72       String input = "" + "org.objenesis.tck.CandidateLoaderTest$A = A candidate\n"
     73          + "org.objenesis.tck.CandidateLoaderTest$NonExistant = Dodgy candidate\n"
     74          + "org.objenesis.tck.CandidateLoaderTest$C = C candidate\n";
     75 
     76       candidateLoader.loadFrom(new ByteArrayInputStream(input.getBytes()));
     77 
     78       assertEquals(""
     79          + "registerCandidate('class org.objenesis.tck.CandidateLoaderTest$A', 'A candidate')\n"
     80          + "classNotFound('org.objenesis.tck.CandidateLoaderTest$NonExistant')\n"
     81          + "registerCandidate('class org.objenesis.tck.CandidateLoaderTest$C', 'C candidate')\n",
     82          recordedEvents.toString());
     83    }
     84 
     85    @Test
     86    public void testLoadsFromResourceInClassPath() throws IOException {
     87       // See CandidateLoaderTest-sample.properties.
     88 
     89       candidateLoader.loadFromResource(getClass(), "CandidateLoaderTest-sample.properties");
     90 
     91       assertEquals(""
     92          + "registerCandidate('class org.objenesis.tck.CandidateLoaderTest$A', 'A candidate')\n"
     93          + "registerCandidate('class org.objenesis.tck.CandidateLoaderTest$B', 'B candidate')\n",
     94          recordedEvents.toString());
     95    }
     96 
     97    @Test
     98    public void testThrowsIOExceptionIfResourceNotInClassPath() throws IOException {
     99       try {
    100          candidateLoader.loadFromResource(getClass(), "Blatently-Bogus.properties");
    101          fail("Expected exception");
    102       }
    103       catch(IOException expectedException) {
    104          // Good!
    105       }
    106    }
    107 
    108    // Sample classes.
    109 
    110    public static class A {
    111    }
    112 
    113    public static class B {
    114    }
    115 
    116    public static class C {
    117    }
    118 }
    119