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package com.vaadin.ui.declarative;
import static org.junit.Assert.assertEquals;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.lang.reflect.Field;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.nodes.Node;
import org.jsoup.nodes.TextNode;
import org.junit.AfterClass;
import org.junit.Test;
import com.vaadin.ui.Component;
import com.vaadin.ui.Label;
/**
* Tests for {@link Design} declarative support class.
*
* @author Vaadin Ltd
*/
public class DesignTest {
private static final Charset CP1251_CHARSET = Charset.forName("cp1251");
private static final Charset UTF8_CHARSET = StandardCharsets.UTF_8;
private static final String NON_ASCII_STRING = "\u043C";
private static final Charset DEFAULT_CHARSET = Charset.defaultCharset();
@AfterClass
public static void restoreCharset()
throws NoSuchFieldException, SecurityException,
IllegalArgumentException, IllegalAccessException {
setCharset(DEFAULT_CHARSET);
}
@Test
public void write_cp1251SystemDefaultEncoding_resultEqualsToUtf8Encoding()
throws IOException, NoSuchFieldException, SecurityException,
IllegalArgumentException, IllegalAccessException {
setCp1251Charset();
String cp1251Html = getHtml();
setUtf8Charset();
String utf8Html = getHtml();
assertEquals(
"Html written with UTF-8 as default encoding "
+ "differs from html written with cp1251 encoding",
cp1251Html, utf8Html);
}
@Test
public void write_cp1251SystemDefaultEncoding_writtenLabelHasCorrectValue()
throws IOException, NoSuchFieldException, SecurityException,
IllegalArgumentException, IllegalAccessException {
setCp1251Charset();
String cp1251Html = getHtml();
assertEquals(
"Non ascii string parsed from serialized HTML "
+ "differs from expected",
NON_ASCII_STRING, getHtmlLabelValue(cp1251Html));
}
@Test
public void write_utf8SystemDefaultEncoding_writtenLabelHasCorrectValue()
throws IOException, NoSuchFieldException, SecurityException,
IllegalArgumentException, IllegalAccessException {
setUtf8Charset();
String utf8 = getHtml();
assertEquals(
"Non ascii string parsed from serialized HTML "
+ "differs from expected",
NON_ASCII_STRING, getHtmlLabelValue(utf8));
}
private String getHtmlLabelValue(String html) {
Document document = Jsoup.parse(html);
Element label = document.select("vaadin-label").get(0);
StringBuilder builder = new StringBuilder();
for (Node child : label.childNodes()) {
if (child instanceof TextNode) {
builder.append(((TextNode) child).getWholeText());
}
}
return builder.toString().trim();
}
private String getHtml() throws IOException {
ByteArrayOutputStream out = new ByteArrayOutputStream();
Component label = new Label(NON_ASCII_STRING);
Design.write(label, out);
return out.toString(UTF8_CHARSET.name());
}
private void setCp1251Charset()
throws NoSuchFieldException, SecurityException,
IllegalArgumentException, IllegalAccessException {
setCharset(CP1251_CHARSET);
}
private void setUtf8Charset()
throws NoSuchFieldException, SecurityException,
IllegalArgumentException, IllegalAccessException {
setCharset(UTF8_CHARSET);
}
private static void setCharset(Charset charset)
throws NoSuchFieldException, SecurityException,
IllegalArgumentException, IllegalAccessException {
Field field = Charset.class.getDeclaredField("defaultCharset");
field.setAccessible(true);
field.set(null, charset);
}
}
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