Fix ContentTypeHelperTest

 pom.xml

@@ -113,6 +113,12 @@
            <version>2.9.0</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.mockito</groupId>
            <artifactId>mockito-core</artifactId>
            <version>5.11.0</version>
            <scope>test</scope>
        </dependency>
    </dependencies>
    <build>
        <plugins>

 src/test/java/org/keycloak/protocol/cas/ContentTypeHelperTest.java

@@ -1,27 +1,27 @@
package org.keycloak.protocol.cas;

import jakarta.ws.rs.core.HttpHeaders;
import jakarta.ws.rs.core.MediaType;
import org.jboss.resteasy.mock.MockHttpRequest;
import org.jboss.resteasy.mock.MockHttpResponse;
import org.jboss.resteasy.specimpl.RequestImpl;
import jakarta.ws.rs.core.*;
import org.junit.Test;
import org.keycloak.protocol.cas.utils.ContentTypeHelper;

import static org.junit.Assert.assertEquals;
import static org.mockito.Mockito.*;

public class ContentTypeHelperTest {
    @Test
    public void test() throws Exception {
        assertEquals(MediaType.APPLICATION_XML_TYPE, get("http://example.com/").selectResponseType());
        assertEquals(MediaType.APPLICATION_JSON_TYPE, get("http://example.com/?format=json").selectResponseType());
        assertEquals(MediaType.APPLICATION_XML_TYPE, get("http://example.com/?format=xml").selectResponseType());
        assertEquals(MediaType.APPLICATION_JSON_TYPE, get("http://example.com/?format=JSON").selectResponseType());
        assertEquals(MediaType.APPLICATION_XML_TYPE, get("http://example.com/?format=XML").selectResponseType());
    public void test() {
        assertEquals(MediaType.APPLICATION_XML_TYPE, get("").selectResponseType());
        assertEquals(MediaType.APPLICATION_JSON_TYPE, get("json").selectResponseType());
        assertEquals(MediaType.APPLICATION_XML_TYPE, get("xml").selectResponseType());
        assertEquals(MediaType.APPLICATION_JSON_TYPE, get("JSON").selectResponseType());
        assertEquals(MediaType.APPLICATION_XML_TYPE, get("XML").selectResponseType());
    }

    private ContentTypeHelper get(String uri) throws Exception {
        MockHttpRequest req = MockHttpRequest.get(uri);
        return new ContentTypeHelper(req.getUri());
    private ContentTypeHelper get(String format) {
        MultivaluedHashMap<String,String> queryParams = mock(MultivaluedHashMap.class);
        when(queryParams.getFirst(CASLoginProtocol.FORMAT_PARAM)).thenReturn(format);
        UriInfo uriInfo = mock(UriInfo.class);
        when(uriInfo.getQueryParameters()).thenReturn(queryParams);
        return new ContentTypeHelper(uriInfo);
    }
}