Add basic test for merge group webhook request

src/test/java/org/eclipsefoundation/git/eca/resource/GithubWebhooksResourceTest.java

@@ -16,6 +16,7 @@ import java.util.Optional;
 
 import org.eclipsefoundation.git.eca.api.models.GithubWebhookRequest;
 import org.eclipsefoundation.git.eca.api.models.GithubWebhookRequest.Installation;
+import org.eclipsefoundation.git.eca.api.models.GithubWebhookRequest.MergeGroup;
 import org.eclipsefoundation.git.eca.api.models.GithubWebhookRequest.PullRequest;
 import org.eclipsefoundation.git.eca.api.models.GithubWebhookRequest.PullRequestHead;
 import org.eclipsefoundation.git.eca.api.models.GithubWebhookRequest.Repository;
@@ -55,6 +56,17 @@ class GithubWebhooksResourceTest {
                 .run();
     }
 
+    @Test
+    void testGHWebhook_success_mergeGroup() {
+        EndpointTestBuilder
+                .from(TestCaseHelper
+                        .prepareTestCase(GH_WEBHOOK_BASE_URL, new String[] {}, null)
+                        .setHeaderParams(Optional.of(Map.of(WebhookHeaders.GITHUB_DELIVERY, "id-1", WebhookHeaders.GITHUB_EVENT, "merge_group")))
+                        .build())
+                .doPost(createMergeGroupWebhookBody())
+                .run();
+    }
+
     private String createGHWebhook() {
         try {
             return om.writeValueAsString(GithubWebhookRequest.builder()
@@ -75,4 +87,23 @@ class GithubWebhooksResourceTest {
             throw new ApplicationException("Error converting Hook to JSON");
         }
     }
+
+    private String createMergeGroupWebhookBody() {
+        try {
+            return om.writeValueAsString(GithubWebhookRequest.builder()
+                    .setInstallation(Installation.builder().setId("install-id").build())
+                    .setMergeGroup(MergeGroup
+                            .builder()
+                            .setHeadSha("headsha-123")
+                            .build())
+                    .setRepository(Repository
+                            .builder()
+                            .setFullName("eclipsefdn/sample")
+                            .setHtmlUrl("http://www.github.com/eclipsefdn/sample")
+                            .build())
+                    .build());
+        } catch (Exception e) {
+            throw new ApplicationException("Error converting Hook to JSON");
+        }
+    }
 }