fix build and add unit tests

products-subgraph/build.gradle.kts

@@ -11,13 +11,14 @@ repositories {
 	mavenCentral()
 }
 
+val federation_jvm_version: String = project.property("federation-jvm.version").toString()
 dependencies {
-    implementation("com.apollographql.federation:federation-graphql-java-support:2.1.0")
+    implementation("com.apollographql.federation:federation-graphql-java-support:$federation_jvm_version")
     implementation("org.springframework.boot:spring-boot-starter-graphql")
 	implementation("org.springframework.boot:spring-boot-starter-web")
-	testImplementation("org.springframework.boot:spring-boot-starter-test")
-	testImplementation("org.springframework:spring-webflux")
-	testImplementation("org.springframework.graphql:spring-graphql-test")
+    testImplementation("org.springframework.boot:spring-boot-starter-test")
+    testImplementation("org.springframework.boot:spring-boot-starter-webflux")
+    testImplementation("org.springframework.graphql:spring-graphql-test")
 }
 
 java {

products-subgraph/gradle.properties

@@ -0,0 +1,2 @@
+federation-jvm.version = 2.1.0
+graphql-java.version = 19.2

products-subgraph/src/test/java/com/example/products/ProductsApplicationTest.java

@@ -0,0 +1,43 @@
+package com.example.products;
+
+import com.example.products.model.Product;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.reactive.AutoConfigureWebTestClient;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.web.server.LocalServerPort;
+import org.springframework.graphql.test.tester.HttpGraphQlTester;
+import org.springframework.test.web.reactive.server.WebTestClient;
+
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+public class ProductsApplicationTest {
+
+  @LocalServerPort
+  int serverPort;
+
+  @Test
+  public void verifiesProductQuery() {
+    WebTestClient testClient = WebTestClient.bindToServer()
+      .baseUrl("http://localhost:" + serverPort + "/graphql")
+      .build();
+    HttpGraphQlTester tester = HttpGraphQlTester.create(testClient);
+
+    String query = """
+      query ProductById($productId: ID!) {
+        product(id: $productId) {
+          id
+          name
+          description
+        }
+      }
+      """;
+
+    // new Product("1","Saturn V", "The Original Super Heavy-Lift Rocket!"),
+    tester.document(query)
+      .variable("productId", "1")
+      .execute()
+      .path("product")
+      .entity(Product.class)
+      .isEqualTo(new Product("1","Saturn V", "The Original Super Heavy-Lift Rocket!"));
+  }
+}

reviews-subgraph/build.gradle.kts

@@ -11,12 +11,13 @@ repositories {
 	mavenCentral()
 }
 
+val federation_jvm_version: String = project.property("federation-jvm.version").toString()
 dependencies {
-    implementation("com.apollographql.federation:federation-graphql-java-support:2.1.0")
+    implementation("com.apollographql.federation:federation-graphql-java-support:$federation_jvm_version")
     implementation("org.springframework.boot:spring-boot-starter-graphql")
 	implementation("org.springframework.boot:spring-boot-starter-web")
 	testImplementation("org.springframework.boot:spring-boot-starter-test")
-	testImplementation("org.springframework:spring-webflux")
+    testImplementation("org.springframework.boot:spring-boot-starter-webflux")
 	testImplementation("org.springframework.graphql:spring-graphql-test")
 }
 

reviews-subgraph/gradle.properties

@@ -0,0 +1,2 @@
+federation-jvm.version = 2.1.0
+graphql-java.version = 19.2

reviews-subgraph/src/test/java/com/example/reviews/ReviewsApplicationTest.java

@@ -0,0 +1,48 @@
+package com.example.reviews;
+
+import com.example.reviews.model.Review;
+import java.util.List;
+import java.util.Map;
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.web.server.LocalServerPort;
+import org.springframework.graphql.test.tester.HttpGraphQlTester;
+import org.springframework.test.web.reactive.server.WebTestClient;
+
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+public class ReviewsApplicationTest {
+
+  @LocalServerPort
+  int serverPort;
+
+  @Test
+  public void verifiesProductQuery() {
+    WebTestClient testClient = WebTestClient.bindToServer()
+      .baseUrl("http://localhost:" + serverPort + "/graphql")
+      .build();
+    HttpGraphQlTester tester = HttpGraphQlTester.create(testClient);
+
+    String query = """
+      query Entities($representations: [_Any!]!) {
+        _entities(representations: $representations) {
+          ...on Product {
+            id
+            reviews {
+              id
+              text
+              starRating
+            }
+          }
+        }
+      }
+      """;
+
+    tester.document(query)
+      .variable("representations", List.of(Map.of("__typename", "Product", "id", "5")))
+      .execute()
+      .path("_entities[0].id").entity(String.class).isEqualTo("5")
+      .path("_entities[0].reviews[0]")
+      .entity(Review.class)
+      .isEqualTo(new Review("1050", "Amazing! Would Fly Again!", 5));
+  }
+}