content: /*
   * Copyright (c) 2008. All rights reserved.
   */
  package ro.isdc.wro.model.resource.processor;
  
  import static org.junit.Assert.assertEquals;
  
  import java.io.File;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.OutputStream;
  import java.io.StringReader;
  import java.io.StringWriter;
  import java.net.URL;
  
  import org.apache.commons.io.input.ReaderInputStream;
  import org.apache.commons.io.output.WriterOutputStream;
  import org.junit.After;
  import org.junit.AfterClass;
  import org.junit.Before;
  import org.junit.BeforeClass;
  import org.junit.Test;
  
  import ro.isdc.wro.WroRuntimeException;
  import ro.isdc.wro.config.Context;
  import ro.isdc.wro.model.resource.ResourceType;
  import ro.isdc.wro.model.resource.processor.impl.js.JSMinProcessor;
  import ro.isdc.wro.model.resource.processor.support.JSMin;
  import ro.isdc.wro.util.WroTestUtils;
  
  
  /**
   * TestJsMinProcessor.
   * 
   * @author Alex Objelean
   * @created Created on Nov 28, 2008
   */
  public class TestJsMinProcessor {
    private ResourcePreProcessor processor;
    
    @BeforeClass
    public static void onBeforeClass() {
      assertEquals(0, Context.countActive());
    }
    
    @AfterClass
    public static void onAfterClass() {
      assertEquals(0, Context.countActive());
    }
    
    @Before
    public void setUp() {
      processor = new JSMinProcessor();
      Context.set(Context.standaloneContext());
      WroTestUtils.createInjector().inject(processor);
    }
    
    @After
    public void tearDown() {
      Context.unset();
    }
    
    @Test
    public void testFromFolder()
        throws IOException {
      final URL url = getClass().getResource("jsmin");
      
      final File testFolder = new File(url.getFile(), "test");
      final File expectedFolder = new File(url.getFile(), "expected");
      WroTestUtils.compareFromDifferentFoldersByExtension(testFolder, expectedFolder, "js", processor);
    }
    
    /**
     * Tests a known issue with JsMin.
     */
    @Test(expected = WroRuntimeException.class)
    public void shoudlFailWhenCompilingAnExpressionWithNewLines()
        throws Exception {
      processor.process(null, new StringReader("Math.round(4\n/3);"), new StringWriter());
      
    }
    
    @Test
    public void shouldSupportCorrectResourceTypes() {
      WroTestUtils.assertProcessorSupportResourceTypes(processor, ResourceType.JS);
    }
    
    @Test
    public void shouldHandleSlashAndIsolatedSingleQuoteInRegexes()
        throws Exception {
      final String script = "var slashOrDoubleQuote=/[/']/g;";
      assertEquals("\n" + script, jsmin(script));
    }
    
    @Test
    public void shouldNotMinifyInsideQuasiLiterals()
        throws Exception {
      assertEquals("\nvar a=`x = y`;", jsmin("var a = `x = y`;"));
    }
    
    @Test
    public void shouldRemoveByteOrderMark()
        throws Exception {
      assertEquals("\nvar a=1;", jsmin("\uFEFFvar a = 1;"));
    }
    
    @Test
    public void shouldNotRemoveLineBreakBeforeExclamationMark()
        throws Exception {
      assertEquals("\nvar a=1\n!true\nconsole.log(a)", jsmin("var a = 1\n!true\nconsole.log(a)"));
    }
    
    @Test
    public void shouldNotRemoveLineBreakBeforeTilde()
        throws Exception {
      assertEquals("\nvar a=1\n~true\nconsole.log(a)", jsmin("var a = 1\n~true\nconsole.log(a)"));
    }
    
    @Test
    public void shouldNotRemoveSpaceBetweenPlusSigns()
        throws Exception {
      assertEquals("\nconsole.log(1\n+ +1)", jsmin("console.log(1\n+ +1)"));
    }
    
    @Test
    public void shouldNotRemoveSpaceBetweenMinusSigns()
        throws Exception {
      assertEquals("\nconsole.log(1\n- -1)", jsmin("console.log(1\n- -1)"));
    }
    
    @Test
    public void shouldRemoveInlineComments()
        throws Exception {
      assertEquals("\nvar r=1;", jsmin("var r = 1; // some comment"));
    }
    
    @Test
    public void shouldRemoveBlockComments()
        throws Exception {
      assertEquals("\nvar r=1;", jsmin("var r = 1; /* some comment */"));
    }
    
    @Test
    public void shouldNotProcessRegexpAfterOperator()
        throws Exception {
      assertEquals("\n1+/a  a/;", jsmin("1 + /a  a/;"));
      assertEquals("\n1-/a  a/;", jsmin("1 - /a  a/;"));
      assertEquals("\n1* /a  a/;", jsmin("1 * /a  a/;"));
      assertEquals("\n1/ /a  a/;", jsmin("1 / /a  a/;"));
      // Not sure why this should work, ~ was added in the original JSMin but the expression below is not valid
      // Javascript.
      assertEquals("\n1~/a  a/;", jsmin("1 ~ /a  a/;"));
    }
    
    @Test
    public void shouldProcessRegexpContainingCurlyBraces()
        throws Exception {
      assertEquals("\nreturn/\\d{1,2}[\\/\\-]\\d{1,2}[\\/\\-]\\d{2,4}/.test(s);",
          jsmin("return /\\d{1,2}[\\/\\-]\\d{1,2}[\\/\\-]\\d{2,4}/.test(s);"));
    }
    
    @Test
    public void shouldProcessRegexpContainingSemicolumn()
        throws Exception {
      assertEquals("\nreturn/a;/.test(s);", jsmin("return /a;/.test(s);"));
    }
    
    @Test(expected = Exception.class)
    public void shouldFailOnInlineCommentAfterUnclosedRegexp()
        throws Exception {
      // Make this fail to be consistent with the original JSMin, although this is in fact valid Javascript if comment is
      // a defined variable.
      jsmin("var r = /a //comment");
    }
    
    @Test(expected = Exception.class)
    public void shouldFailOnUnclosedBlockCommentAfterUnclosedRegexp()
        throws Exception {
      // same comment as above
      jsmin("var r = /a/*comment");
    }
    
    private String jsmin(final String inputScript)
        throws Exception {
      final StringReader reader = new StringReader(inputScript);
      final InputStream is = new ReaderInputStream(reader, "UTF-8");
      final StringWriter writer = new StringWriter();
      final OutputStream os = new WriterOutputStream(writer, "UTF-8");
      new JSMin(is, os).jsmin();
      return writer.toString();
    }
  }
  