blob: 67ec3410c130201a5e736dfafc4f01fec8649900 [file] [log] [blame]
// Copyright (c) 2016, 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.
import 'package:analyzer/src/dart/analysis/cache.dart';
import 'package:test/test.dart';
import 'package:test_reflective_loader/test_reflective_loader.dart';
main() {
defineReflectiveSuite(() {
defineReflectiveTests(CacheTest);
});
}
List<int> _b(int length) {
return List<int>(length);
}
@reflectiveTest
class CacheTest {
test_get_notFound_evict() {
var cache = _newBytesCache(100);
// Request '1'. Nothing found.
expect(cache.get('1', _noBytes), isNull);
// Add enough data to the store to force an eviction.
cache.put('2', _b(40));
cache.put('3', _b(40));
cache.put('4', _b(40));
}
test_get_notFound_retry() {
var cache = _newBytesCache(100);
// Request '1'. Nothing found.
expect(cache.get('1', _noBytes), isNull);
// Request '1' again.
// The previous `null` result should not have been cached.
expect(cache.get('1', () => _b(40)), isNotNull);
}
test_get_put_evict() {
var cache = _newBytesCache(100);
// Keys: [1, 2].
cache.put('1', _b(40));
cache.put('2', _b(50));
// Request '1', so now it is the most recently used.
// Keys: [2, 1].
cache.get('1', _noBytes);
// 40 + 50 + 30 > 100
// So, '2' is evicted.
cache.put('3', _b(30));
expect(cache.get('1', _noBytes), hasLength(40));
expect(cache.get('2', _noBytes), isNull);
expect(cache.get('3', _noBytes), hasLength(30));
}
test_put_evict_first() {
var cache = _newBytesCache(100);
// 40 + 50 < 100
cache.put('1', _b(40));
cache.put('2', _b(50));
expect(cache.get('1', _noBytes), hasLength(40));
expect(cache.get('2', _noBytes), hasLength(50));
// 40 + 50 + 30 > 100
// So, '1' is evicted.
cache.put('3', _b(30));
expect(cache.get('1', _noBytes), isNull);
expect(cache.get('2', _noBytes), hasLength(50));
expect(cache.get('3', _noBytes), hasLength(30));
}
test_put_evict_firstAndSecond() {
var cache = _newBytesCache(100);
// 10 + 80 < 100
cache.put('1', _b(10));
cache.put('2', _b(80));
expect(cache.get('1', _noBytes), hasLength(10));
expect(cache.get('2', _noBytes), hasLength(80));
// 10 + 80 + 30 > 100
// So, '1' and '2' are evicted.
cache.put('3', _b(30));
expect(cache.get('1', _noBytes), isNull);
expect(cache.get('2', _noBytes), isNull);
expect(cache.get('3', _noBytes), hasLength(30));
}
Cache<String, List<int>> _newBytesCache(int maxSizeBytes) =>
Cache<String, List<int>>(maxSizeBytes, (bytes) => bytes.length);
static List<int> _noBytes() => null;
}