scuffed-code/icu4c/source/test/intltest/unifiedcachetest.cpp

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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
* Copyright (C) 2015, International Business Machines Corporation and *
* others. All Rights Reserved. *
*******************************************************************************
*
* File UNIFIEDCACHETEST.CPP
*
********************************************************************************
*/
#include "cstring.h"
#include "intltest.h"
#include "unifiedcache.h"
#include "unicode/datefmt.h"
class UCTItem : public SharedObject {
public:
char *value;
UCTItem(const char *x) : value(NULL) {
value = uprv_strdup(x);
}
virtual ~UCTItem() {
uprv_free(value);
}
};
class UCTItem2 : public SharedObject {
};
U_NAMESPACE_BEGIN
template<> U_EXPORT
const UCTItem *LocaleCacheKey<UCTItem>::createObject(
const void *context, UErrorCode &status) const {
const UnifiedCache *cacheContext = (const UnifiedCache *) context;
if (uprv_strcmp(fLoc.getName(), "zh") == 0) {
status = U_MISSING_RESOURCE_ERROR;
return NULL;
}
if (uprv_strcmp(fLoc.getLanguage(), fLoc.getName()) != 0) {
const UCTItem *item = NULL;
if (cacheContext == NULL) {
UnifiedCache::getByLocale(fLoc.getLanguage(), item, status);
} else {
cacheContext->get(LocaleCacheKey<UCTItem>(fLoc.getLanguage()), item, status);
}
if (U_FAILURE(status)) {
return NULL;
}
return item;
}
UCTItem *result = new UCTItem(fLoc.getName());
result->addRef();
return result;
}
template<> U_EXPORT
const UCTItem2 *LocaleCacheKey<UCTItem2>::createObject(
const void * /*unused*/, UErrorCode & /*status*/) const {
return NULL;
}
U_NAMESPACE_END
class UnifiedCacheTest : public IntlTest {
public:
UnifiedCacheTest() {
}
void runIndexedTest(int32_t index, UBool exec, const char *&name, char *par=0);
private:
void TestEvictionPolicy();
void TestBounded();
void TestBasic();
void TestError();
void TestHashEquals();
void TestEvictionUnderStress();
};
void UnifiedCacheTest::runIndexedTest(int32_t index, UBool exec, const char* &name, char* /*par*/) {
TESTCASE_AUTO_BEGIN;
TESTCASE_AUTO(TestEvictionPolicy);
TESTCASE_AUTO(TestBounded);
TESTCASE_AUTO(TestBasic);
TESTCASE_AUTO(TestError);
TESTCASE_AUTO(TestHashEquals);
TESTCASE_AUTO(TestEvictionUnderStress);
TESTCASE_AUTO_END;
}
void UnifiedCacheTest::TestEvictionUnderStress() {
#if !UCONFIG_NO_FORMATTING
int32_t localeCount;
const Locale *locales = DateFormat::getAvailableLocales(localeCount);
UErrorCode status = U_ZERO_ERROR;
const UnifiedCache *cache = UnifiedCache::getInstance(status);
int64_t evictedCountBefore = cache->autoEvictedCount();
for (int32_t i = 0; i < localeCount; ++i) {
LocalPointer<DateFormat> ptr(DateFormat::createInstanceForSkeleton("yMd", locales[i], status));
}
int64_t evictedCountAfter = cache->autoEvictedCount();
if (evictedCountBefore == evictedCountAfter) {
dataerrln("%s:%d Items should have been evicted from cache",
__FILE__, __LINE__);
}
#endif /* #if !UCONFIG_NO_FORMATTING */
}
void UnifiedCacheTest::TestEvictionPolicy() {
UErrorCode status = U_ZERO_ERROR;
// We have to call this first or else calling the UnifiedCache
// ctor will fail. This is by design to deter clients from using the
// cache API incorrectly by creating their own cache instances.
UnifiedCache::getInstance(status);
// We create our own local UnifiedCache instance to ensure we have
// complete control over it. Real clients should never ever create
// their own cache!
UnifiedCache cache(status);
assertSuccess("", status);
// Don't allow unused entries to exeed more than 100% of in use entries.
cache.setEvictionPolicy(0, 100, status);
static const char *locales[] = {
"1", "2", "3", "4", "5", "6", "7", "8", "9", "10",
"11", "12", "13", "14", "15", "16", "17", "18", "19", "20"};
const UCTItem *usedReferences[] = {NULL, NULL, NULL, NULL, NULL};
const UCTItem *unusedReference = NULL;
// Add 5 in-use entries
for (int32_t i = 0; i < UPRV_LENGTHOF(usedReferences); i++) {
cache.get(
LocaleCacheKey<UCTItem>(locales[i]),
&cache,
usedReferences[i],
status);
}
// Add 10 not in use entries.
for (int32_t i = 0; i < 10; ++i) {
cache.get(
LocaleCacheKey<UCTItem>(
locales[i + UPRV_LENGTHOF(usedReferences)]),
&cache,
unusedReference,
status);
}
unusedReference->removeRef();
// unused count not to exeed in use count
assertEquals("T1", UPRV_LENGTHOF(usedReferences), cache.unusedCount());
assertEquals("T2", 2*UPRV_LENGTHOF(usedReferences), cache.keyCount());
// Free up those used entries.
for (int32_t i = 0; i < UPRV_LENGTHOF(usedReferences); i++) {
usedReferences[i]->removeRef();
}
// This should free up all cache items
assertEquals("T3", 0, cache.keyCount());
assertSuccess("T4", status);
}
void UnifiedCacheTest::TestBounded() {
UErrorCode status = U_ZERO_ERROR;
// We have to call this first or else calling the UnifiedCache
// ctor will fail. This is by design to deter clients from using the
// cache API incorrectly by creating their own cache instances.
UnifiedCache::getInstance(status);
// We create our own local UnifiedCache instance to ensure we have
// complete control over it. Real clients should never ever create
// their own cache!
UnifiedCache cache(status);
assertSuccess("T0", status);
// Maximum unused count is 3.
cache.setEvictionPolicy(3, 0, status);
// Our cache will hold up to 3 unused key-value pairs
// We test the following invariants:
// 1. unusedCount <= 3
// 2. cache->get(X) always returns the same reference as long as caller
// already holds references to that same object.
// We first add 5 key-value pairs with two distinct values, "en" and "fr"
// keeping all those references.
const UCTItem *en = NULL;
const UCTItem *enGb = NULL;
const UCTItem *enUs = NULL;
const UCTItem *fr = NULL;
const UCTItem *frFr = NULL;
cache.get(LocaleCacheKey<UCTItem>("en_US"), &cache, enUs, status);
cache.get(LocaleCacheKey<UCTItem>("en"), &cache, en, status);
assertEquals("T1", 1, cache.unusedCount());
cache.get(LocaleCacheKey<UCTItem>("en_GB"), &cache, enGb, status);
cache.get(LocaleCacheKey<UCTItem>("fr_FR"), &cache, frFr, status);
cache.get(LocaleCacheKey<UCTItem>("fr"), &cache, fr, status);
// Client holds two unique references, "en" and "fr" the other three
// entries are eligible for eviction.
assertEquals("T2", 3, cache.unusedCount());
assertEquals("T3", 5, cache.keyCount());
// Exercise cache more but don't hold the references except for
// the last one. At the end of this, we will hold references to one
// additional distinct value, so we will have references to 3 distinct
// values.
const UCTItem *throwAway = NULL;
cache.get(LocaleCacheKey<UCTItem>("zn_AA"), &cache, throwAway, status);
cache.get(LocaleCacheKey<UCTItem>("sr_AA"), &cache, throwAway, status);
cache.get(LocaleCacheKey<UCTItem>("de_AU"), &cache, throwAway, status);
const UCTItem *deAu(throwAway);
deAu->addRef();
// Client holds three unique references, "en", "fr", "de" although we
// could have a total of 8 entries in the cache maxUnusedCount == 3
// so we have only 6 entries.
assertEquals("T4", 3, cache.unusedCount());
assertEquals("T5", 6, cache.keyCount());
// For all the references we have, cache must continue to return
// those same references (#2)
cache.get(LocaleCacheKey<UCTItem>("en"), &cache, throwAway, status);
if (throwAway != en) {
errln("T6: Expected en to resolve to the same object.");
}
cache.get(LocaleCacheKey<UCTItem>("en_US"), &cache, throwAway, status);
if (throwAway != enUs) {
errln("T7: Expected enUs to resolve to the same object.");
}
cache.get(LocaleCacheKey<UCTItem>("en_GB"), &cache, throwAway, status);
if (throwAway != enGb) {
errln("T8: Expected enGb to resolve to the same object.");
}
cache.get(LocaleCacheKey<UCTItem>("fr_FR"), &cache, throwAway, status);
if (throwAway != frFr) {
errln("T9: Expected frFr to resolve to the same object.");
}
cache.get(LocaleCacheKey<UCTItem>("fr_FR"), &cache, throwAway, status);
cache.get(LocaleCacheKey<UCTItem>("fr"), &cache, throwAway, status);
if (throwAway != fr) {
errln("T10: Expected fr to resolve to the same object.");
}
cache.get(LocaleCacheKey<UCTItem>("de_AU"), &cache, throwAway, status);
if (throwAway != deAu) {
errln("T11: Expected deAu to resolve to the same object.");
}
assertEquals("T12", 3, cache.unusedCount());
assertEquals("T13", 6, cache.keyCount());
// Now we hold a references to two more distinct values. Cache size
// should grow to 8.
const UCTItem *es = NULL;
const UCTItem *ru = NULL;
cache.get(LocaleCacheKey<UCTItem>("es"), &cache, es, status);
cache.get(LocaleCacheKey<UCTItem>("ru"), &cache, ru, status);
assertEquals("T14", 3, cache.unusedCount());
assertEquals("T15", 8, cache.keyCount());
// Now release all the references we hold except for
// es, ru, and en
SharedObject::clearPtr(enGb);
SharedObject::clearPtr(enUs);
SharedObject::clearPtr(fr);
SharedObject::clearPtr(frFr);
SharedObject::clearPtr(deAu);
SharedObject::clearPtr(es);
SharedObject::clearPtr(ru);
SharedObject::clearPtr(en);
SharedObject::clearPtr(throwAway);
// Size of cache should magically drop to 3.
assertEquals("T16", 3, cache.unusedCount());
assertEquals("T17", 3, cache.keyCount());
// Be sure nothing happens setting the eviction policy in the middle of
// a run.
cache.setEvictionPolicy(3, 0, status);
assertSuccess("T18", status);
}
void UnifiedCacheTest::TestBasic() {
UErrorCode status = U_ZERO_ERROR;
const UnifiedCache *cache = UnifiedCache::getInstance(status);
assertSuccess("", status);
cache->flush();
int32_t baseCount = cache->keyCount();
const UCTItem *en = NULL;
const UCTItem *enGb = NULL;
const UCTItem *enGb2 = NULL;
const UCTItem *enUs = NULL;
const UCTItem *fr = NULL;
const UCTItem *frFr = NULL;
cache->get(LocaleCacheKey<UCTItem>("en"), en, status);
cache->get(LocaleCacheKey<UCTItem>("en_US"), enUs, status);
cache->get(LocaleCacheKey<UCTItem>("en_GB"), enGb, status);
cache->get(LocaleCacheKey<UCTItem>("fr_FR"), frFr, status);
cache->get(LocaleCacheKey<UCTItem>("fr"), fr, status);
cache->get(LocaleCacheKey<UCTItem>("en_GB"), enGb2, status);
SharedObject::clearPtr(enGb2);
if (enGb != enUs) {
errln("Expected en_GB and en_US to resolve to same object.");
}
if (fr != frFr) {
errln("Expected fr and fr_FR to resolve to same object.");
}
if (enGb == fr) {
errln("Expected en_GB and fr to return different objects.");
}
assertSuccess("T1", status);
// en_US, en_GB, en share one object; fr_FR and fr don't share.
// 5 keys in all.
assertEquals("T2", baseCount + 5, cache->keyCount());
SharedObject::clearPtr(enGb);
cache->flush();
// Only 2 unique values in the cache. flushing trims cache down
// to this minimum size.
assertEquals("T3", baseCount + 2, cache->keyCount());
SharedObject::clearPtr(enUs);
SharedObject::clearPtr(en);
cache->flush();
// With en_GB and en_US and en cleared there are no more hard references to
// the "en" object, so it gets flushed and the keys that refer to it
// get removed from the cache. Now we have just one unique value, fr, in
// the cache
assertEquals("T4", baseCount + 1, cache->keyCount());
SharedObject::clearPtr(fr);
cache->flush();
assertEquals("T5", baseCount + 1, cache->keyCount());
SharedObject::clearPtr(frFr);
cache->flush();
assertEquals("T6", baseCount + 0, cache->keyCount());
assertSuccess("T7", status);
}
void UnifiedCacheTest::TestError() {
UErrorCode status = U_ZERO_ERROR;
const UnifiedCache *cache = UnifiedCache::getInstance(status);
assertSuccess("", status);
cache->flush();
int32_t baseCount = cache->keyCount();
const UCTItem *zh = NULL;
const UCTItem *zhTw = NULL;
const UCTItem *zhHk = NULL;
status = U_ZERO_ERROR;
cache->get(LocaleCacheKey<UCTItem>("zh"), zh, status);
if (status != U_MISSING_RESOURCE_ERROR) {
errln("Expected U_MISSING_RESOURCE_ERROR");
}
status = U_ZERO_ERROR;
cache->get(LocaleCacheKey<UCTItem>("zh_TW"), zhTw, status);
if (status != U_MISSING_RESOURCE_ERROR) {
errln("Expected U_MISSING_RESOURCE_ERROR");
}
status = U_ZERO_ERROR;
cache->get(LocaleCacheKey<UCTItem>("zh_HK"), zhHk, status);
if (status != U_MISSING_RESOURCE_ERROR) {
errln("Expected U_MISSING_RESOURCE_ERROR");
}
// 3 keys in cache zh, zhTW, zhHk all pointing to error placeholders
assertEquals("", baseCount + 3, cache->keyCount());
cache->flush();
// error placeholders have no hard references so they always get flushed.
assertEquals("", baseCount + 0, cache->keyCount());
}
void UnifiedCacheTest::TestHashEquals() {
LocaleCacheKey<UCTItem> key1("en_US");
LocaleCacheKey<UCTItem> key2("en_US");
LocaleCacheKey<UCTItem> diffKey1("en_UT");
LocaleCacheKey<UCTItem2> diffKey2("en_US");
assertTrue("", key1.hashCode() == key2.hashCode());
assertTrue("", key1.hashCode() != diffKey1.hashCode());
assertTrue("", key1.hashCode() != diffKey2.hashCode());
assertTrue("", diffKey1.hashCode() != diffKey2.hashCode());
assertTrue("", key1 == key2);
assertTrue("", key1 != diffKey1);
assertTrue("", key1 != diffKey2);
assertTrue("", diffKey1 != diffKey2);
}
extern IntlTest *createUnifiedCacheTest() {
return new UnifiedCacheTest();
}