#2677 - Change trimOnPut to be 10% of max or 1_000.

Can look to provide an explicit option via `@CacheBeanTuning` later.

ebean-core/src/test/java/io/ebeaninternal/server/cache/DefaultServerCacheConfigTest.java

@@ -6,8 +6,7 @@ import org.junit.jupiter.api.Test;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
-public class DefaultServerCacheConfigTest {
-
+class DefaultServerCacheConfigTest {
 
   private DefaultServerCacheConfig create(int maxSize, int maxIdleSecs, int maxSecsToLive, int trimFreq) {
     ServerCacheOptions options = new ServerCacheOptions();
@@ -20,33 +19,45 @@ public class DefaultServerCacheConfigTest {
   }
 
   @Test
-  public void trimFreq_halfIdle() {
-
+  void trimFreq_halfIdle() {
     assertEquals(create(10000,10,20, 0).determineTrimFrequency(), 4);
   }
 
-
   @Test
-  public void trimFreq_halfIdle_withRounding() {
-
+  void trimFreq_halfIdle_withRounding() {
     assertEquals(create(10000,11,20, 0).determineTrimFrequency(), 4);
   }
 
   @Test
-  public void trimFreq_halfTTL() {
-
+  void trimFreq_halfTTL() {
     assertEquals(create(10000,0,20, 0).determineTrimFrequency(), 9);
   }
 
   @Test
-  public void trimFreq_halfTTL_withRounding() {
-
+  void trimFreq_halfTTL_withRounding() {
     assertEquals(create(10000,0,21, 0).determineTrimFrequency(), 9);
   }
 
   @Test
-  public void trimFreq_explicit() {
-
+  void trimFreq_explicit() {
     assertEquals(create(10000,10,20, 42).determineTrimFrequency(), 42);
   }
+
+  @Test
+  void trimOnPut_default() {
+    assertEquals(create(0,0,0, 0).determineTrimOnPut(), 1_000);
+  }
+
+  @Test
+  void trimOnPut_tenPercent() {
+    assertEquals(create(10_000,0,0, 0).determineTrimOnPut(), 1_000);
+    assertEquals(create(9_000,0,0, 0).determineTrimOnPut(), 900);
+    assertEquals(create(100,0,0, 0).determineTrimOnPut(), 10);
+  }
+
+  @Test
+  void trimOnPut_roundDown() {
+    assertEquals(create(9010,0,0, 0).determineTrimOnPut(), 901);
+    assertEquals(create(9009,0,0, 0).determineTrimOnPut(), 900);
+  }
 }