Some clean ups for caching tests.

pkg/analysis_server/test/index/lru_cache_test.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library test.index.lru_cache;
 
 import 'package:analysis_server/src/index/lru_cache.dart';
 import 'package:unittest/unittest.dart';
 
 import '../reflective_tests.dart';
 
 
 main() {
   groupSep = ' | ';
   group('FixedStringCodecTest', () {
     runReflectiveTests(_LRUCacheTest);
   });
 }
 
 
 @ReflectiveTestCase()
 class _LRUCacheTest {
   LRUCache<int, String> cache = new LRUCache<int, String>(3);
 
-  void test_evict() {
+  void test_evict_notGet() {
     List<int> evictedKeys = new List<int>();
     List<String> evictedValues = new List<String>();
     cache = new LRUCache<int, String>(3, (int key, String value) {
       evictedKeys.add(key);
       evictedValues.add(value);
     });
     // fill
     cache.put(1, 'A');
     cache.put(2, 'B');
     cache.put(3, 'C');
     // access '1' and '3'
     cache.get(1);
     cache.get(3);
     // put '4', evict '2'
     cache.put(4, 'D');
     expect(cache.get(1), 'A');
     expect(cache.get(2), isNull);
     expect(cache.get(3), 'C');
     expect(cache.get(4), 'D');
     // check eviction listener
     expect(evictedKeys, contains(2));
     expect(evictedValues, contains('B'));
   }
 
+  void test_evict_notPut() {
+    List<int> evictedKeys = new List<int>();
+    List<String> evictedValues = new List<String>();
+    cache = new LRUCache<int, String>(3, (int key, String value) {
+      evictedKeys.add(key);
+      evictedValues.add(value);
+    });
+    // fill
+    cache.put(1, 'A');
+    cache.put(2, 'B');
+    cache.put(3, 'C');
+    // put '1' and '3'
+    cache.put(1, 'AA');
+    cache.put(3, 'CC');
+    // put '4', evict '2'
+    cache.put(4, 'D');
+    expect(cache.get(1), 'AA');
+    expect(cache.get(2), isNull);
+    expect(cache.get(3), 'CC');
+    expect(cache.get(4), 'D');
+    // check eviction listener
+    expect(evictedKeys, contains(2));
+    expect(evictedValues, contains('B'));
+  }
+
   void test_putGet() {
     // fill
     cache.put(1, 'A');
     cache.put(2, 'B');
     cache.put(3, 'C');
     // check
     expect(cache.get(1), 'A');
     expect(cache.get(2), 'B');
     expect(cache.get(3), 'C');
     expect(cache.get(4), isNull);
   }
 
   void test_remove() {
     cache.put(1, 'A');
     cache.put(2, 'B');
     cache.put(3, 'C');
     // remove
     cache.remove(1);
     cache.remove(3);
     // check
     expect(cache.get(1), isNull);
     expect(cache.get(2), 'B');
     expect(cache.get(3), isNull);
   }
 }