Follow up #3173 - Add test for BeanSet lazy loading OneToMany with hashCode/equals

ebean-test/src/test/java/org/tests/sets/O2MDepart.java

@@ -0,0 +1,38 @@
+package org.tests.sets;
+
+import javax.persistence.*;
+import java.util.LinkedHashSet;
+import java.util.Set;
+import java.util.UUID;
+
+@Entity
+public class O2MDepart {
+
+  @Id
+  private UUID id;
+
+  private final String name;
+
+  @OneToMany(cascade = CascadeType.PERSIST)
+  private final Set<O2MEmp> employees = new LinkedHashSet<>();
+
+  public O2MDepart(String name) {
+    this.name = name;
+  }
+
+  public void addEmployee(O2MEmp employee) {
+    this.employees.add(employee);
+  }
+
+  public UUID getId() {
+    return id;
+  }
+
+  public String getName() {
+    return name;
+  }
+
+  public Set<O2MEmp> employees() {
+    return employees;
+  }
+}

ebean-test/src/test/java/org/tests/sets/O2MEmp.java

@@ -0,0 +1,56 @@
+package org.tests.sets;
+
+import javax.persistence.*;
+import java.util.HashSet;
+import java.util.Objects;
+import java.util.Set;
+import java.util.UUID;
+
+@Entity
+public class O2MEmp {
+
+  @Id
+  private UUID id;
+
+  private final String code;
+
+  private String name;
+
+  @ManyToOne
+  O2MDepart department;
+
+  public O2MEmp(String name, String code) {
+    this.name = name;
+    this.code = code;
+  }
+
+  public UUID getId() {
+    return id;
+  }
+
+  public String getName() {
+    return name;
+  }
+
+  public String getCode() {
+    return code;
+  }
+
+  public void setDepartment(O2MDepart department) {
+    this.department = department;
+  }
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) return true;
+    if (o == null || getClass() != o.getClass()) return false;
+    O2MEmp employee = (O2MEmp) o;
+    return Objects.equals(code, employee.code);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(code);
+  }
+
+}

ebean-test/src/test/java/org/tests/sets/TestO2MSet.java

@@ -0,0 +1,30 @@
+package org.tests.sets;
+
+import io.ebean.DB;
+import io.ebean.test.LoggedSql;
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class TestO2MSet {
+
+  @Test
+  void lazyLoadO2M_when_setWithHashCode_expect_selectProperties() {
+    final O2MDepart department = new O2MDepart("Test");
+    final O2MEmp employee = new O2MEmp("Test", "Code");
+    department.addEmployee(employee);
+    DB.save(department);
+
+    LoggedSql.start();
+    DB.find(O2MDepart.class, department.getId())
+      .employees()
+      .forEach(e -> assertThat(e.getName()).isNotNull());
+
+    List<String> sql = LoggedSql.stop();
+    assertThat(sql).hasSize(2);
+    assertThat(sql.get(0)).contains("select t0.id, t0.name from o2_mdepart t0 where t0.id = ?");
+    assertThat(sql.get(1)).contains("select t0.department_id, t0.id, t0.code, t0.name, t0.department_id from o2_memp t0 where");
+  }
+}