Copy the lrucache test from libzim.

- Adapt lrucache.cpp for rigth include path
  and use `kiwix::lru_cache` instead of `zim::lru_cache`.
- Add missing `#include <set>` in lrucache.h

src/tools/lrucache.h

@@ -40,6 +40,7 @@
 
 #include <map>
 #include <list>
+#include <set>
 #include <cstddef>
 #include <stdexcept>
 #include <cassert>

test/lrucache.cpp

@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2014, lamerman
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ *
+ * * Neither the name of lamerman nor the names of its
+ *   contributors may be used to endorse or promote products derived from
+ *   this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "../src/tools/lrucache.h"
+#include "../src/tools/concurrent_cache.h"
+#include "gtest/gtest.h"
+
+const unsigned int NUM_OF_TEST2_RECORDS = 100;
+const unsigned int TEST2_CACHE_CAPACITY = 50;
+
+TEST(CacheTest, SimplePut) {
+    kiwix::lru_cache<int, int> cache_lru(1);
+    cache_lru.put(7, 777);
+    EXPECT_TRUE(cache_lru.exists(7));
+    EXPECT_EQ(777, cache_lru.get(7));
+    EXPECT_EQ(1U, cache_lru.size());
+}
+
+TEST(CacheTest, OverwritingPut) {
+    kiwix::lru_cache<int, int> cache_lru(1);
+    cache_lru.put(7, 777);
+    cache_lru.put(7, 222);
+    EXPECT_TRUE(cache_lru.exists(7));
+    EXPECT_EQ(222, cache_lru.get(7));
+    EXPECT_EQ(1U, cache_lru.size());
+}
+
+TEST(CacheTest, MissingValue) {
+    kiwix::lru_cache<int, int> cache_lru(1);
+    EXPECT_TRUE(cache_lru.get(7).miss());
+    EXPECT_FALSE(cache_lru.get(7).hit());
+    EXPECT_THROW(cache_lru.get(7).value(), std::range_error);
+}
+
+TEST(CacheTest, DropValue) {
+    kiwix::lru_cache<int, int> cache_lru(3);
+    cache_lru.put(7, 777);
+    cache_lru.put(8, 888);
+    cache_lru.put(9, 999);
+    EXPECT_EQ(3U, cache_lru.size());
+    EXPECT_TRUE(cache_lru.exists(7));
+    EXPECT_EQ(777, cache_lru.get(7));
+
+    EXPECT_TRUE(cache_lru.drop(7));
+
+    EXPECT_EQ(2U, cache_lru.size());
+    EXPECT_FALSE(cache_lru.exists(7));
+    EXPECT_THROW(cache_lru.get(7).value(), std::range_error);
+
+    EXPECT_FALSE(cache_lru.drop(7));
+}
+
+TEST(CacheTest1, KeepsAllValuesWithinCapacity) {
+    kiwix::lru_cache<int, int> cache_lru(TEST2_CACHE_CAPACITY);
+
+    for (uint i = 0; i < NUM_OF_TEST2_RECORDS; ++i) {
+        cache_lru.put(i, i);
+    }
+
+    for (uint i = 0; i < NUM_OF_TEST2_RECORDS - TEST2_CACHE_CAPACITY; ++i) {
+        EXPECT_FALSE(cache_lru.exists(i));
+    }
+
+    for (uint i = NUM_OF_TEST2_RECORDS - TEST2_CACHE_CAPACITY; i < NUM_OF_TEST2_RECORDS; ++i) {
+        EXPECT_TRUE(cache_lru.exists(i));
+        EXPECT_EQ((int)i, cache_lru.get(i));
+    }
+
+    size_t size = cache_lru.size();
+    EXPECT_EQ(TEST2_CACHE_CAPACITY, size);
+}
+
+TEST(ConcurrentCacheTest, handleException) {
+    kiwix::ConcurrentCache<int, int> cache(1);
+    auto val = cache.getOrPut(7, []() { return 777; });
+    EXPECT_EQ(val, 777);
+    EXPECT_THROW(cache.getOrPut(8, []() { throw std::runtime_error("oups"); return 0; }), std::runtime_error);
+    val = cache.getOrPut(8, []() { return 888; });
+    EXPECT_EQ(val, 888);
+}
+

test/meson.build

@@ -10,7 +10,8 @@ tests = [
     'manager',
     'name_mapper',
     'opds_catalog',
-    'server_helper'
+    'server_helper',
+    'lrucache'
 ]
 
 if build_machine.system() != 'windows'