W3CSelectorsTest.java

package com.github.sommeri.less4j.compiler;

import java.io.File;
import java.util.Collection;

import org.junit.runners.Parameterized.Parameters;

import com.github.sommeri.less4j.AbstractFileBasedTest;

/**
 *  Testing whether less4j correctly compiles css3 selectors conforming to 
 *  <a href="http://www.w3.org/TR/css3-selectors/">w3c specification</a>. The test case
 *  goes through official w3c test cases downloaded from <a href="http://www.w3.org/Style/CSS/Test/CSS3/Selectors/current/">w3.org</a>. 
 *
 *  All tests have been run through less.js compiler. As less.js and less4j are not strictly identical,
 *  we modified less.js output from raw version into less4j compatible version. All this work is done
 *  in {@link RhinoCompiler} utility class.
 *  
 *  Special cases:
 *  1.) Less.js crashed on some tests, even as those tests contained valid css. Those are stored in 
 *  less.js-incompatible directory. Expected outputs have been created manually. In general, less.js
 *  crashed on anything that contains :not(:nth-xxx-xxxx(an+b)) and :not(:lang(xxx)). 
 *  
 *  Ignored cases:
 *  1.) Our compiler does not support namespaces yet, so those tests are not run yet. Tests on
 *  namespaces are in todo-namespaces and less.js-incompatible\namespaces directories. 
 *  
 *  2.) Some w3c tests test interpreter behavior on malformed css, those are irrelevant and 
 *  stored in incorrect-css and less.js-incompatible\incorrect-css directories.
 *
 */
public class W3CSelectorsTest extends AbstractFileBasedTest {

  private static final String standardCases = "src/test/resources/w3c-official-test-cases/CSS3-Selectors/";
  private static final String lessjsIncompatibleNegatedNth = "src/test/resources/w3c-official-test-cases/CSS3-Selectors/less.js-incompatible/correct-css/negated-nth";
  private static final String lessjsIncompatibleNegatedVarious = "src/test/resources/w3c-official-test-cases/CSS3-Selectors/less.js-incompatible/correct-css/negated-various";

  public W3CSelectorsTest(File inputFile, File outputFile, File errorList, File mapdataFile, File configFile, String testName) {
    super(inputFile, outputFile, errorList, mapdataFile, configFile, testName);
  }

  @Parameters(name="Less: {5}")
  public static Collection<Object[]> allTestsParameters() {
    return createTestFileUtils().loadTestFiles(standardCases, lessjsIncompatibleNegatedNth, lessjsIncompatibleNegatedVarious);
  }

}