test: add NumberSignal IT (#2632)

* test: _view to view

* fix IT views urls after changing to use file-router

---------

Co-authored-by: Vlad Rindevich <vladrin@vaadin.com>

packages/java/tests/spring/react-signals/frontend/helper/NumberSignalServiceWrapper.ts

@@ -0,0 +1,12 @@
+import { NumberSignalChannel } from '@vaadin/hilla-react-signals';
+import client_1 from 'Frontend/generated/connect-client.default.js';
+
+export function sharedValue() {
+  const signalChannel = new NumberSignalChannel('NumberSignalProviderService.sharedValue', client_1);
+  return signalChannel.signal;
+}
+
+export function counter() {
+  const signalChannel = new NumberSignalChannel('NumberSignalProviderService.counter', client_1);
+  return signalChannel.signal;
+}

packages/java/tests/spring/react-signals/frontend/views/SharedNumberSignal.tsx

@@ -0,0 +1,56 @@
+import * as NumberSignalServiceWrapper from '../helper/NumberSignalServiceWrapper.js';
+import { Button } from '@vaadin/react-components';
+import { useSignal } from '@vaadin/hilla-react-signals';
+import { NumberSignalProviderService } from 'Frontend/generated/endpoints.js';
+
+const counter = NumberSignalServiceWrapper.counter();
+const sharedValue = NumberSignalServiceWrapper.sharedValue();
+
+export default function SharedNumberSignal() {
+  const sharedValueFromServer = useSignal<number | undefined>(0.0);
+  const counterValueFromServer = useSignal<number | undefined>(0);
+
+  return (
+    <div>
+      <span id="sharedValue">{sharedValue}</span>
+      <Button id="increaseSharedValue" onClick={() => (sharedValue.value += 2)}>
+        Increase by 2
+      </Button>
+      <br />
+      <span id="counter">{counter}</span>
+      <Button id="incrementCounter" onClick={() => counter.value++}>
+        Increment
+      </Button>
+      <br />
+      <Button
+        id="reset"
+        onClick={() => {
+          sharedValue.value = 0.5;
+          counter.value = 0;
+        }}
+      >
+        Reset
+      </Button>
+      <br />
+      <span id="sharedValueFromServer">{sharedValueFromServer}</span>
+      <Button
+        id="fetchSharedValue"
+        onClick={async () => {
+          sharedValueFromServer.value = await NumberSignalProviderService.fetchSharedValue();
+        }}
+      >
+        Fetch shared value from server
+      </Button>
+      <br />
+      <span id="counterValueFromServer">{counterValueFromServer}</span>
+      <Button
+        id="fetchCounterValue"
+        onClick={async () => {
+          counterValueFromServer.value = await NumberSignalProviderService.fetchCounterValue();
+        }}
+      >
+        Fetch counter value from server
+      </Button>
+    </div>
+  );
+}

packages/java/tests/spring/react-signals/package.json

@@ -26,7 +26,7 @@
     "lit": "3.1.4",
     "react": "18.3.1",
     "react-dom": "18.3.1",
-    "react-router-dom": "6.24.0"
+    "react-router-dom": "6.25.1"
   },
   "devDependencies": {
     "@babel/preset-react": "7.24.7",
@@ -115,7 +115,7 @@
       "workbox-core": "7.1.0",
       "workbox-precaching": "7.1.0"
     },
-    "hash": "dbe5fc273574a91bf1c52e38906846d2b07d719b34e30c328b25383c147cf785"
+    "hash": "b71200b2ab6d40627f74056e4581c07f48b9beb22ea33e293c3198e214710ca9"
   },
   "overrides": {
     "@vaadin/common-frontend": "$@vaadin/common-frontend",

packages/java/tests/spring/react-signals/src/main/java/com/vaadin/hilla/test/signals/service/NumberSignalProviderService.java

@@ -0,0 +1,34 @@
+package com.vaadin.hilla.test.signals.service;
+
+import com.vaadin.hilla.signals.NumberSignal;
+import com.vaadin.flow.server.auth.AnonymousAllowed;
+import com.vaadin.hilla.BrowserCallable;
+import jakarta.validation.constraints.NotNull;
+
+import java.util.Optional;
+
+@AnonymousAllowed
+@BrowserCallable
+public class NumberSignalProviderService {
+    private final NumberSignal counter = new NumberSignal();
+    private final NumberSignal sharedValue = new NumberSignal(0.5);
+
+    public NumberSignal counter() {
+        return counter;
+    }
+
+    public NumberSignal sharedValue() {
+        return sharedValue;
+    }
+
+    @NotNull
+    public Double fetchSharedValue() {
+        return sharedValue.getValue();
+    }
+
+    @NotNull
+    public Long fetchCounterValue() {
+        return Optional.ofNullable(counter.getValue()).map(Double::longValue)
+                .orElse(null);
+    }
+}

packages/java/tests/spring/react-signals/src/main/resources/vaadin-featureflags.properties

@@ -0,0 +1,2 @@
+# Experimental feature flags for Vaadin
+com.vaadin.experimental.fullstackSignals=true

packages/java/tests/spring/react-signals/src/test/java/com/vaadin/hilla/test/BasicSignalIT.java

@@ -13,7 +13,7 @@ public class BasicSignalIT extends ChromeBrowserTest {
     @Before
     public void setup() throws Exception {
         super.setup();
-        getDriver().get(getRootURL() + "/basic-signal");
+        getDriver().get(getRootURL() + "/BasicSignalView");
     }
 
     @Test