VariantsTest.java

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package com.sun.jersey.impl.resource;

import com.sun.jersey.impl.AbstractResourceTester;
import javax.ws.rs.Path;
import com.sun.jersey.api.client.WebResource;
import com.sun.jersey.api.client.ClientResponse;
import com.sun.jersey.core.header.MediaTypes;
import java.io.IOException;
import java.util.List;
import java.util.Locale;
import javax.ws.rs.GET;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Request;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Variant;

/**
 *
 * @author Paul.Sandoz@Sun.Com
 */
public class VariantsTest extends AbstractResourceTester {
    
    public VariantsTest(String testName) {
        super(testName);
    }

    @Path("/")
    public static class LanguageVariantResource {
        @GET
        public Response doGet(@Context Request r) {
            List<Variant> vs = Variant.VariantListBuilder.newInstance().
                    languages(new Locale("zh")).
                    languages(new Locale("fr")).
                    languages(new Locale("en")).add().
                    build();

            Variant v = r.selectVariant(vs);
            if (v == null)
                return Response.notAcceptable(vs).build();
            else
                return Response.ok(v.getLanguage().toString(), v).build();
        }
    }

    public void testGetLanguageEn() throws IOException {
        initiateWebApplication(LanguageVariantResource.class);
        WebResource rp = resource("/");

        ClientResponse r = rp.
                header("Accept-Language", "en").
                get(ClientResponse.class);
        assertEquals("en", r.getEntity(String.class));
        assertEquals("en", r.getLanguage());
        String vary = r.getHeaders().getFirst("Vary");
        assertNotNull(vary);
        assertTrue(!contains(vary, "Accept"));
        assertTrue(contains(vary, "Accept-Language"));
    }

    public void testGetLanguageZh() throws IOException {
        initiateWebApplication(LanguageVariantResource.class);
        WebResource rp = resource("/");

        ClientResponse r = rp.
                header("Accept-Language", "zh").
                get(ClientResponse.class);
        assertEquals("zh", r.getEntity(String.class));
        assertEquals("zh", r.getLanguage());
        System.out.println(r.getHeaders().getFirst("Vary"));
        String vary = r.getHeaders().getFirst("Vary");
        assertNotNull(vary);
        assertTrue(!contains(vary, "Accept"));
        assertTrue(contains(vary, "Accept-Language"));
    }

    public void testGetLanguageMultiple() throws IOException {
        initiateWebApplication(LanguageVariantResource.class);
        WebResource rp = resource("/");

        ClientResponse r = rp.
                header("Accept-Language", "en;q=0.3, zh;q=0.4, fr").
                get(ClientResponse.class);
        assertEquals("fr", r.getEntity(String.class));
        assertEquals("fr", r.getLanguage());
        String vary = r.getHeaders().getFirst("Vary");
        assertNotNull(vary);
        assertTrue(!contains(vary, "Accept"));
        assertTrue(contains(vary, "Accept-Language"));
    }

    @Path("/")
    public static class ComplexVariantResource {
        @GET
        public Response doGet(@Context Request r) {
            List<Variant> vs = Variant.VariantListBuilder.newInstance().
                    mediaTypes(MediaType.valueOf("image/jpeg")).add().
                    mediaTypes(MediaType.valueOf("application/xml")).
                    languages(new Locale("en", "us")).add().
                    mediaTypes(MediaType.valueOf("text/xml")).
                    languages(new Locale("en")).add().
                    mediaTypes(MediaType.valueOf("text/xml")).
                    languages(new Locale("en", "us")).add().
                    build();

            Variant v = r.selectVariant(vs);
            if (v == null)
                return Response.notAcceptable(vs).build();
            else
                return Response.ok("GET", v).build();
        }
    }

    public void testGetComplex1() throws IOException {
        initiateWebApplication(ComplexVariantResource.class);
        WebResource rp = resource("/");

        ClientResponse r = rp.accept("text/xml",
                "application/xml",
                "application/xhtml+xml",
                "image/png",
                "text/html;q=0.9",
                "text/plain;q=0.8",
                "*/*;q=0.5").
                header("Accept-Language", "en-us,en;q=0.5").
                get(ClientResponse.class);
        assertEquals("GET", r.getEntity(String.class));
        assertEquals(MediaType.valueOf("text/xml"), r.getType());
        assertEquals("en-US", r.getLanguage());
        String vary = r.getHeaders().getFirst("Vary");
        assertNotNull(vary);
        assertTrue(contains(vary, "Accept"));
        assertTrue(contains(vary, "Accept-Language"));
    }

    public void testGetComplex2() throws IOException {
        initiateWebApplication(ComplexVariantResource.class);
        WebResource rp = resource("/");

        ClientResponse r = rp.accept("text/xml",
                "application/xml",
                "application/xhtml+xml",
                "image/png",
                "text/html;q=0.9",
                "text/plain;q=0.8",
                "*/*;q=0.5").
                header("Accept-Language", "en,en-us").
                get(ClientResponse.class);
        assertEquals("GET", r.getEntity(String.class));
        assertEquals(MediaType.valueOf("text/xml"), r.getType());
        assertEquals("en", r.getLanguage());
        String vary = r.getHeaders().getFirst("Vary");
        assertNotNull(vary);
        assertTrue(contains(vary, "Accept"));
        assertTrue(contains(vary, "Accept-Language"));
    }

    public void testGetComplex3() throws IOException {
        initiateWebApplication(ComplexVariantResource.class);
        WebResource rp = resource("/");

        ClientResponse r = rp.accept("application/xml",
                "text/xml",
                "application/xhtml+xml",
                "image/png",
                "text/html;q=0.9",
                "text/plain;q=0.8",
                "*/*;q=0.5").
                header("Accept-Language", "en-us,en;q=0.5").
                get(ClientResponse.class);
        assertEquals("GET", r.getEntity(String.class));
        assertEquals(MediaType.valueOf("application/xml"), r.getType());
        assertEquals("en-US", r.getLanguage());
        String vary = r.getHeaders().getFirst("Vary");
        assertNotNull(vary);
        assertTrue(contains(vary, "Accept"));
        assertTrue(contains(vary, "Accept-Language"));
    }

    public void testGetComplexNotAcceptable() throws IOException {
        initiateWebApplication(ComplexVariantResource.class);
        WebResource rp = resource("/", false);

        ClientResponse r = rp.accept("application/atom+xml").
                header("Accept-Language", "en-us,en").
                get(ClientResponse.class);
        String vary = r.getHeaders().getFirst("Vary");
        assertNotNull(vary);
        assertTrue(contains(vary, "Accept"));
        assertTrue(contains(vary, "Accept-Language"));
        assertEquals(406, r.getStatus());

        r = rp.accept("application/xml").
                header("Accept-Language", "fr").
                get(ClientResponse.class);
        vary = r.getHeaders().getFirst("Vary");
        assertNotNull(vary);
        assertTrue(contains(vary, "Accept"));
        assertTrue(contains(vary, "Accept-Language"));
        assertEquals(406, r.getStatus());
    }
    
    @Path("/")
    public static class MediaTypeQualitySourceResource {
        @GET
        public Response doGet(@Context Request r) {
            List<Variant> vs = Variant.VariantListBuilder.newInstance().
                    mediaTypes(MediaType.valueOf("application/xml")).
                    mediaTypes(MediaType.valueOf("text/html;qs=2.0")).
                    add().
                    build();

            Variant v = r.selectVariant(vs);
            if (v == null)
                return Response.notAcceptable(vs).build();
            else
                return Response.ok("GET", v).build();
        }
    }

    public void testMediaTypeQualitySource() throws IOException {
        initiateWebApplication(MediaTypeQualitySourceResource.class);
        WebResource rp = resource("/");

        ClientResponse r = rp.accept(
                "application/xml",
                "text/html;q=0.9").
                get(ClientResponse.class);
        assertTrue(MediaTypes.typeEquals(MediaType.valueOf("text/html"), r.getType()));
        String vary = r.getHeaders().getFirst("Vary");
        assertNotNull(vary);
        assertTrue(contains(vary, "Accept"));

        r = rp.accept(
                "text/html",
                "application/xml").
                get(ClientResponse.class);
        assertTrue(MediaTypes.typeEquals(MediaType.valueOf("text/html"), r.getType()));
        vary = r.getHeaders().getFirst("Vary");
        assertNotNull(vary);
        assertTrue(contains(vary, "Accept"));

        r = rp.accept(
                "application/xml",
                "text/html").
                get(ClientResponse.class);
        assertTrue(MediaTypes.typeEquals(MediaType.valueOf("text/html"), r.getType()));
        vary = r.getHeaders().getFirst("Vary");
        assertNotNull(vary);
        assertTrue(contains(vary, "Accept"));

        r = rp.accept(
                "application/xml").
                get(ClientResponse.class);
        assertTrue(MediaTypes.typeEquals(MediaType.valueOf("application/xml"), r.getType()));
        vary = r.getHeaders().getFirst("Vary");
        assertNotNull(vary);
        assertTrue(contains(vary, "Accept"));
    }

    private boolean contains(String l, String v) {
        String[] vs = l.split(",");
        for (String s : vs) {
            s = s.trim();
            if (s.equalsIgnoreCase(v))
                return true;
        }
        
        return false;
    }
}