[TEST] Add test that ensures we never bump the minor version of lucene in a bugfix release

core/src/test/java/org/elasticsearch/VersionTests.java

@@ -260,4 +260,20 @@ public class VersionTests extends ESTestCase {
         }
     }
 
+    // this test ensures we never bump the lucene version in a bugfix release
+    public void testLuceneVersionIsSameOnMinorRelease() {
+        for (Version version : VersionUtils.allVersions()) {
+            for (Version other : VersionUtils.allVersions()) {
+                if (other.onOrAfter(version)) {
+                    assertTrue("lucene versions must be "  + other + " >= " + version,
+                        other.luceneVersion.onOrAfter(version.luceneVersion));
+                }
+                if (other.major == version.major && other.minor == version.minor) {
+                    assertEquals(other.luceneVersion.major, version.luceneVersion.major);
+                    assertEquals(other.luceneVersion.minor, version.luceneVersion.minor);
+                    // should we also assert the lucene bugfix version?
+                }
+            }
+        }
+    }
 }