Adding automation tests for nested entities

sdm/src/test/java/integration/com/sap/cds/sdm/Api.java

@@ -74,15 +74,28 @@ private Response executeWithRetry(Request request) throws IOException {
 
   public String createEntityDraft(
       String appUrl, String entityName, String entityName2, String srvpath) {
+    return createEntityDraft(appUrl, entityName, entityName2, srvpath, null);
+  }
+
+  public String createEntityDraft(
+      String appUrl, String entityName, String entityName2, String srvpath, String bookID) {
     MediaType mediaType = MediaType.parse("application/json");
 
     // Creating the Entity (draft)
-    RequestBody body =
-        RequestBody.create(
-            mediaType,
-            "{\n    \"title\": \"IntegrationTestEntity\",\n    \""
-                + entityName2
-                + "\": {\n        \"ID\": \"41cf82fb-94bf-4d62-9e45-fa25f959b5b0\",\n        \"name\": \"Akshat\"\n    }\n}");
+    String jsonBody;
+    if (bookID != null && !bookID.isEmpty()) {
+      // Creating a Chapter within a Book
+      jsonBody =
+          "{\n    \"title\": \"IntegrationTestEntity\",\n    \"book_ID\": \"" + bookID + "\"\n}";
+    } else {
+      // Creating a Book or other entity
+      jsonBody =
+          "{\n    \"title\": \"IntegrationTestEntity\",\n    \""
+              + entityName2
+              + "\": {\n        \"ID\": \"41cf82fb-94bf-4d62-9e45-fa25f959b5b0\",\n        \"name\": \"Akshat\"\n    }\n}";
+    }
+
+    RequestBody body = RequestBody.create(mediaType, jsonBody);
 
     Request request =
         new Request.Builder()
@@ -842,7 +855,9 @@ public String openAttachment(
             + appUrl
             + "/odata/v4/"
             + serviceName
-            + "/Books(ID="
+            + "/"
+            + entityName
+            + "(ID="
             + entityID
             + ",IsActiveEntity=true)"
             + "/"

sdm/src/test/java/integration/com/sap/cds/sdm/ApiInterface.java

@@ -10,6 +10,9 @@ public interface ApiInterface {
   public String createEntityDraft(
       String appUrl, String entityName, String entityName2, String srvpath);
 
+  public String createEntityDraft(
+      String appUrl, String entityName, String entityName2, String srvpath, String bookID);
+
   public String editEntityDraft(String appUrl, String entityName, String srvpath, String entityID);
 
   public String saveEntityDraft(String appUrl, String entityName, String srvpath, String entityID);

sdm/src/test/java/integration/com/sap/cds/sdm/ApiMT.java

@@ -73,15 +73,28 @@ private Response executeWithRetry(Request request) throws IOException {
 
   public String createEntityDraft(
       String appUrl, String entityName, String entityName2, String srvpath) {
+    return createEntityDraft(appUrl, entityName, entityName2, srvpath, null);
+  }
+
+  public String createEntityDraft(
+      String appUrl, String entityName, String entityName2, String srvpath, String bookID) {
     MediaType mediaType = MediaType.parse("application/json");
 
     // Creating the Entity (draft)
-    RequestBody body =
-        RequestBody.create(
-            mediaType,
-            "{\n    \"title\": \"IntegrationTestEntity\",\n    \""
-                + entityName2
-                + "\": {\n        \"ID\": \"41cf82fb-94bf-4d62-9e45-fa25f959b5b0\",\n        \"name\": \"Akshat\"\n    }\n}");
+    String jsonBody;
+    if (bookID != null && !bookID.isEmpty()) {
+      // Creating a Chapter within a Book
+      jsonBody =
+          "{\n    \"title\": \"IntegrationTestEntity\",\n    \"book_ID\": \"" + bookID + "\"\n}";
+    } else {
+      // Creating a Book or other entity
+      jsonBody =
+          "{\n    \"title\": \"IntegrationTestEntity\",\n    \""
+              + entityName2
+              + "\": {\n        \"ID\": \"41cf82fb-94bf-4d62-9e45-fa25f959b5b0\",\n        \"name\": \"Akshat\"\n    }\n}";
+    }
+
+    RequestBody body = RequestBody.create(mediaType, jsonBody);
 
     Request request =
         new Request.Builder()