AcceptLanguageHeaderParserTest.java

package com.temenos.interaction.core.rim;

/*
 * #%L
 * interaction-core
 * %%
 * Copyright (C) 2012 - 2014 Temenos Holdings N.V.
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * #L%
 */

import static org.junit.Assert.*;

import java.util.List;

import org.junit.Test;

public class AcceptLanguageHeaderParserTest {

	@Test
	public void testGetLanguageCodesForInvalidValues() {
		List<String> preferredLanguages = new AcceptLanguageHeaderParser(null).getLanguageCodes();
		assertEquals(0, preferredLanguages.size());

		preferredLanguages = new AcceptLanguageHeaderParser("").getLanguageCodes();
		assertEquals(0, preferredLanguages.size());

		preferredLanguages = new AcceptLanguageHeaderParser(",").getLanguageCodes();
		assertEquals(0, preferredLanguages.size());
		
		preferredLanguages = new AcceptLanguageHeaderParser("en-gb,en;foo").getLanguageCodes(); // invalid quality value part
		assertEquals(1, preferredLanguages.size());	
		assertEquals("en-gb", preferredLanguages.get(0));		
		
		preferredLanguages = new AcceptLanguageHeaderParser("en-gb,en;q=foo").getLanguageCodes(); // invalid q value
		assertEquals(1, preferredLanguages.size());		
		assertEquals("en-gb", preferredLanguages.get(0));
		
		preferredLanguages = new AcceptLanguageHeaderParser("en-us,en&gb").getLanguageCodes(); // invalid &
		assertEquals(1, preferredLanguages.size());		
		assertEquals("en-us", preferredLanguages.get(0));	
		
		preferredLanguages = new AcceptLanguageHeaderParser("en-us,en gb").getLanguageCodes(); // invalid space
		assertEquals(1, preferredLanguages.size());		
		assertEquals("en-us", preferredLanguages.get(0));				
	}

	@Test
	public void testGetLanguageCodesWithAcceptedSpaces() {
		List<String> preferredLanguages = new AcceptLanguageHeaderParser("en ").getLanguageCodes();
		assertEquals(1, preferredLanguages.size());
		assertEquals("en", preferredLanguages.get(0));

		preferredLanguages = new AcceptLanguageHeaderParser("en; q=0.6,fr").getLanguageCodes();
		assertEquals(2, preferredLanguages.size());
		assertEquals("fr", preferredLanguages.get(0));
		assertEquals("en", preferredLanguages.get(1));
		
		preferredLanguages = new AcceptLanguageHeaderParser("en; q =0.6,fr").getLanguageCodes();
		assertEquals(2, preferredLanguages.size());
		assertEquals("fr", preferredLanguages.get(0));
		assertEquals("en", preferredLanguages.get(1));
		
		preferredLanguages = new AcceptLanguageHeaderParser("en; q= 0.6,fr").getLanguageCodes();
		assertEquals(2, preferredLanguages.size());
		assertEquals("fr", preferredLanguages.get(0));
		assertEquals("en", preferredLanguages.get(1));
		
		preferredLanguages = new AcceptLanguageHeaderParser("en; q = 0.6,fr").getLanguageCodes();
		assertEquals(2, preferredLanguages.size());
		assertEquals("fr", preferredLanguages.get(0));
		assertEquals("en", preferredLanguages.get(1));
		
		preferredLanguages = new AcceptLanguageHeaderParser(" fr,en-gb").getLanguageCodes();
		assertEquals(2, preferredLanguages.size());		
		assertEquals("fr", preferredLanguages.get(0));	
		assertEquals("en-gb", preferredLanguages.get(1));
		
		preferredLanguages = new AcceptLanguageHeaderParser("en-gb,fr ; q = 0.9 ").getLanguageCodes();
		assertEquals(2, preferredLanguages.size());		
		assertEquals("en-gb", preferredLanguages.get(0));
		assertEquals("fr", preferredLanguages.get(1));
	}

	@Test
	public void testLanguageCodes() {
		List<String> preferredLanguages = new AcceptLanguageHeaderParser("fr").getLanguageCodes();
		assertEquals(1, preferredLanguages.size());
		assertEquals("fr", preferredLanguages.get(0));

		preferredLanguages = new AcceptLanguageHeaderParser("en, fr").getLanguageCodes();
		assertEquals(2, preferredLanguages.size());
		assertEquals("en", preferredLanguages.get(0));
		assertEquals("fr", preferredLanguages.get(1));

		preferredLanguages = new AcceptLanguageHeaderParser("en-us, fr").getLanguageCodes();
		assertEquals(2, preferredLanguages.size());
		assertEquals("en-us", preferredLanguages.get(0));
		assertEquals("fr", preferredLanguages.get(1));

		preferredLanguages = new AcceptLanguageHeaderParser("en, en-gb, fr").getLanguageCodes();
		assertEquals(3, preferredLanguages.size());
		assertEquals("en", preferredLanguages.get(0));
		assertEquals("en-gb", preferredLanguages.get(1));
		assertEquals("fr", preferredLanguages.get(2));

		preferredLanguages = new AcceptLanguageHeaderParser("en;q=0.9, fr;q=1.0").getLanguageCodes();
		assertEquals(2, preferredLanguages.size());
		assertEquals("fr", preferredLanguages.get(0));
		assertEquals("en", preferredLanguages.get(1));

		preferredLanguages = new AcceptLanguageHeaderParser("en-us;q=0.3, fr").getLanguageCodes();
		assertEquals(2, preferredLanguages.size());
		assertEquals("fr", preferredLanguages.get(0));
		assertEquals("en-us", preferredLanguages.get(1));

		preferredLanguages = new AcceptLanguageHeaderParser("en-us;q=0.4, en, fr").getLanguageCodes();
		assertEquals(3, preferredLanguages.size());
		assertEquals("en", preferredLanguages.get(0));
		assertEquals("fr", preferredLanguages.get(1));
		assertEquals("en-us", preferredLanguages.get(2));

		preferredLanguages = new AcceptLanguageHeaderParser("en-us;q=0.4, en;q=0.5, fr").getLanguageCodes();
		assertEquals(3, preferredLanguages.size());
		assertEquals("fr", preferredLanguages.get(0));
		assertEquals("en", preferredLanguages.get(1));
		assertEquals("en-us", preferredLanguages.get(2));

		preferredLanguages = new AcceptLanguageHeaderParser("en-us;q=1.0, en-gb;q=0.8,fr").getLanguageCodes();
		assertEquals(3, preferredLanguages.size());
		assertEquals("en-us", preferredLanguages.get(0));
		assertEquals("fr", preferredLanguages.get(1));
		assertEquals("en-gb", preferredLanguages.get(2));

		preferredLanguages = new AcceptLanguageHeaderParser("en-us;q=0.9,,en-gb;q=0.8,,,fr").getLanguageCodes();
		assertEquals(3, preferredLanguages.size());
		assertEquals("fr", preferredLanguages.get(0));
		assertEquals("en-us", preferredLanguages.get(1));
		assertEquals("en-gb", preferredLanguages.get(2));

		preferredLanguages = new AcceptLanguageHeaderParser("en-gb;q=0.7, en-us;q=0.8, fr;q=0.9, en")
				.getLanguageCodes();
		assertEquals(4, preferredLanguages.size());
		assertEquals("en", preferredLanguages.get(0));
		assertEquals("fr", preferredLanguages.get(1));
		assertEquals("en-us", preferredLanguages.get(2));
		assertEquals("en-gb", preferredLanguages.get(3));
	}
}