com.vaadin.sass.testcases.scss.AbstractDirectoryScanningSassTests.java Source code

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Here is the source code for com.vaadin.sass.testcases.scss.AbstractDirectoryScanningSassTests.java

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/*
 * Copyright 2000-2013 Vaadin Ltd.
 *
 * Licensed 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 com.vaadin.sass.testcases.scss;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FilenameFilter;
import java.io.IOException;
import java.net.URISyntaxException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

import org.apache.commons.io.IOUtils;
import org.junit.Assert;

import com.vaadin.sass.internal.ScssStylesheet;
import com.vaadin.sass.testcases.scss.SassTestRunner.FactoryTest;

public abstract class AbstractDirectoryScanningSassTests {

    public static Collection<String> getScssResourceNames(URL directoryUrl) throws URISyntaxException {
        List<String> resources = new ArrayList<String>();
        for (File scssFile : getScssFiles(directoryUrl)) {
            resources.add(scssFile.getName());
        }
        return resources;
    }

    private static File[] getScssFiles(URL directoryUrl) throws URISyntaxException {
        URL sasslangUrl = directoryUrl;
        File sasslangDir = new File(sasslangUrl.toURI());
        File scssDir = new File(sasslangDir, "scss");
        Assert.assertTrue(scssDir.exists());

        return scssDir.listFiles(new FilenameFilter() {

            @Override
            public boolean accept(File dir, String name) {
                return name.endsWith(".scss");
            }
        });
    }

    protected abstract URL getResourceURL(String path);

    @FactoryTest
    public void compareScssWithCss(String scssResourceName) throws Exception {
        String referenceCss;
        File scssFile = getSassLangResourceFile(scssResourceName);
        File cssFile = getCssFile(scssFile);
        referenceCss = IOUtils.toString(new FileInputStream(cssFile));
        ScssStylesheet scssStylesheet = ScssStylesheet.get(scssFile.getAbsolutePath());
        scssStylesheet.compile();
        String parsedCss = scssStylesheet.toString();

        Assert.assertEquals("Original CSS and parsed CSS do not match for " + scssResourceName,
                normalize(referenceCss), normalize(parsedCss));
    }

    private String normalize(String css) {
        // Replace all whitespace characters with a single space
        css = css.replaceAll("[\n\r\t ]*", " ");
        // remove trailing whitespace
        css = css.replaceAll("[\n\r\t ]*$", "");
        return css;
    }

    private File getSassLangResourceFile(String resourceName) throws IOException, URISyntaxException {
        String base = "/scss/";
        String fullResourceName = base + resourceName;
        URL res = getResourceURL(fullResourceName);
        if (res == null) {
            throw new FileNotFoundException(
                    "Resource " + resourceName + " not found (tried " + fullResourceName + ")");
        }
        return new File(res.toURI());
    }

    private File getCssFile(File scssFile) {
        return new File(scssFile.getAbsolutePath().replace("scss", "css"));
    }
}