[JENKINS-76289] Add icon size control to new dashboard

Author: Flamki

core/src/main/resources/lib/hudson/projectView.jelly

@@ -88,9 +88,11 @@ THE SOFTWARE.
         </div>
 
         <l:userExperimentalFlag var="newDashboardPage" flagClassName="jenkins.model.experimentalflags.NewDashboardPageUserExperimentalFlag" />
-        <j:if test="${!newDashboardPage}">
-          <t:iconSize><t:rssBar/></t:iconSize>
-        </j:if>
+        <t:iconSize>
+          <j:if test="${!newDashboardPage}">
+            <t:rssBar/>
+          </j:if>
+        </t:iconSize>
       </div>
 
       <div class="jenkins-jobs-list jenkins-mobile-show">

test/src/test/java/hudson/model/ViewTest.java

@@ -71,6 +71,7 @@
 import java.util.logging.LogRecord;
 import jenkins.model.Jenkins;
 import jenkins.model.ProjectNamingStrategy;
+import jenkins.model.experimentalflags.UserExperimentalFlagsProperty;
 import jenkins.security.NotReallyRoleSensitiveCallable;
 import org.htmlunit.FailingHttpStatusCodeException;
 import org.htmlunit.FormEncodingType;
@@ -137,6 +138,27 @@ void roundTrip() throws Exception {
         assertTrue(view.isFilterQueue());
     }
 
+    @Issue("JENKINS-76289")
+    @Test
+    void newDashboardShowsIconSizeControl() throws Exception {
+        j.jenkins.setSecurityRealm(j.createDummySecurityRealm());
+
+        User user = User.getOrCreateByIdOrFullName("new-dashboard-user");
+        Map<String, String> flags = new HashMap<>();
+        flags.put("new-dashboard-page.flag", "true");
+        user.addProperty(new UserExperimentalFlagsProperty(flags));
+
+        j.createFreeStyleProject("p");
+
+        WebClient webClient = j.createWebClient().withBasicCredentials(user.getId());
+        HtmlPage page = webClient.goTo("view/all/");
+
+        assertNotNull(page.getFirstByXPath("//div[contains(@class,'app-build-bar')]"));
+        assertNotNull(page.getFirstByXPath("//div[contains(@class,'jenkins-icon-size')]"));
+        assertNotNull(page.getFirstByXPath("//a[contains(@href,'iconSize?16x16')]"));
+        assertNotNull(page.getFirstByXPath("//a[contains(@href,'iconSize?24x24')]"));
+    }
+
     @Issue("JENKINS-7100")
     @Test
     void xHudsonHeader() throws Exception {