Refactor move tests from ebean-core to ebean-test

ebean-test/src/test/java/org/tests/unitinternal/TestNullCollectionSet.java

@@ -0,0 +1,37 @@
+package org.tests.unitinternal;
+
+import io.ebean.BaseTestCase;
+import io.ebean.DB;
+import io.ebean.bean.BeanCollection;
+import org.tests.model.basic.ENullCollection;
+import org.tests.model.basic.ENullCollectionDetail;
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public class TestNullCollectionSet extends BaseTestCase {
+
+  @Test
+  public void test() {
+    ENullCollection c = new ENullCollection();
+
+    DB.save(c);
+
+    ENullCollection c2 = DB.find(ENullCollection.class, c.getId());
+
+    assertNotNull(c2);
+
+    List<ENullCollectionDetail> details = c2.getDetails();
+    assertNotNull(details);
+
+    assertTrue(details instanceof BeanCollection<?>);
+
+    BeanCollection<?> bc = (BeanCollection<?>) details;
+    assertFalse(bc.isPopulated());
+    assertNotNull(bc.getOwnerBean());
+    assertNotNull(bc.getPropertyName());
+  }
+
+}