unit test for: update ManyToMany collection cache on updating cached beans

src/test/java/com/avaje/tests/model/basic/CachedBean.java

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+package com.avaje.tests.model.basic;
+
+import com.avaje.ebean.annotation.CacheStrategy;
+import com.avaje.ebean.annotation.CacheTuning;
+
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.ManyToMany;
+import javax.persistence.Table;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Cached bean for testing caching implementation.
+ */
+@CacheStrategy
+@Entity
+@Table(name = "o_cached_bean")
+public class CachedBean {
+
+  @Id
+  Long id;
+
+  @ManyToMany
+  List<Country> countries = new ArrayList<Country>();
+
+  public Long getId() {
+    return id;
+  }
+
+  public void setId(Long id) {
+    this.id = id;
+  }
+
+  public List<Country> getCountries() {
+    return countries;
+  }
+
+  public void setCountries(List<Country> countries) {
+    this.countries = countries;
+  }
+}