WIP update for migration runner

src/test/java/com/avaje/ebean/dbmigration/runner/ChecksumTest.java

@@ -0,0 +1,18 @@
+package com.avaje.ebean.dbmigration.runner;
+
+import org.junit.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class ChecksumTest {
+
+  @Test
+  public void test_calculate() throws Exception {
+
+    int checkFoo = Checksum.calculate("foo");
+
+    assertThat(Checksum.calculate("foo")).isEqualTo(checkFoo);
+    assertThat(Checksum.calculate("Foo")).isNotEqualTo(checkFoo);
+  }
+
+}