Task: Upgraded the dgs graphql to submodules and parent modules for extends projects

dgs-graphql/src/test/kotlin/com/cubetiqs/graphql/demo/GraphqlDemoApplicationTests.kt

@@ -0,0 +1,55 @@
+package com.cubetiqs.graphql.demo
+
+import com.cubetiqs.graphql.demo.resolver.subscription.HelloSubscriptionResolver
+import com.netflix.graphql.dgs.DgsQueryExecutor
+import com.netflix.graphql.dgs.autoconfig.DgsAutoConfiguration
+import graphql.ExecutionResult
+import org.junit.jupiter.api.Test
+import org.reactivestreams.Publisher
+import org.reactivestreams.Subscriber
+import org.reactivestreams.Subscription
+import org.springframework.beans.factory.annotation.Autowired
+import org.springframework.boot.test.context.SpringBootTest
+
+@SpringBootTest(
+    classes = [
+        DgsAutoConfiguration::class,
+        HelloSubscriptionResolver::class,
+    ]
+)
+class GraphqlDemoApplicationTests {
+    @Autowired
+    lateinit var dgsQueryExecutor: DgsQueryExecutor
+
+    @Test
+    fun helloSubscription() {
+        dgsQueryExecutor.execute(
+            """
+            subscription {
+              hello
+            }
+        """.trimIndent()
+        )
+            .getData<Publisher<ExecutionResult>>()
+            .subscribe(object : Subscriber<ExecutionResult> {
+                override fun onSubscribe(s: Subscription) {
+                    s.request(2)
+                }
+
+                override fun onNext(t: ExecutionResult) {
+                    println(t.getData<Any?>())
+                }
+
+                override fun onError(t: Throwable?) {
+
+                }
+
+                override fun onComplete() {
+                    println("Hello World")
+                }
+            }
+
+            )
+    }
+
+}