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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.inputmethod.latin.personalization;
import android.test.AndroidTestCase;
import android.test.suitebuilder.annotation.LargeTest;
import android.util.Log;
import com.android.inputmethod.latin.ExpandableBinaryDictionary;
import com.android.inputmethod.latin.utils.CollectionUtils;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import java.util.Random;
import java.util.Set;
import java.util.concurrent.TimeUnit;
/**
* Unit tests for UserHistoryDictionary
*/
@LargeTest
public class UserHistoryDictionaryTests extends AndroidTestCase {
private static final String TAG = UserHistoryDictionaryTests.class.getSimpleName();
private static final String[] CHARACTERS = {
"a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m",
"n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"
};
/**
* Generates a random word.
*/
private String generateWord(final int value) {
final int lengthOfChars = CHARACTERS.length;
StringBuilder builder = new StringBuilder();
long lvalue = Math.abs((long)value);
while (lvalue > 0) {
builder.append(CHARACTERS[(int)(lvalue % lengthOfChars)]);
lvalue /= lengthOfChars;
}
return builder.toString();
}
private List<String> generateWords(final int number, final Random random) {
final Set<String> wordSet = CollectionUtils.newHashSet();
while (wordSet.size() < number) {
wordSet.add(generateWord(random.nextInt()));
}
return new ArrayList<String>(wordSet);
}
private void addToDict(final UserHistoryDictionary dict, final List<String> words) {
String prevWord = null;
for (String word : words) {
dict.addToDictionary(prevWord, word, true,
(int)TimeUnit.MILLISECONDS.toSeconds(System.currentTimeMillis()));
prevWord = word;
}
}
/**
* @param checkContents if true, checks whether written words are actually in the dictionary
* or not.
*/
private void addAndWriteRandomWords(final String testFilenameSuffix, final int numberOfWords,
final Random random, final boolean checkContents) {
final List<String> words = generateWords(numberOfWords, random);
final UserHistoryDictionary dict =
PersonalizationHelper.getUserHistoryDictionary(getContext(),
new Locale(testFilenameSuffix));
// Add random words to the user history dictionary.
addToDict(dict, words);
if (checkContents) {
dict.waitAllTasksForTests();
for (int i = 0; i < numberOfWords; ++i) {
final String word = words.get(i);
assertTrue(dict.isInDictionaryForTests(word));
}
}
// write to file.
dict.close();
}
/**
* Clear all entries in the user history dictionary.
* @param testFilenameSuffix file name suffix used for testing.
*/
private void clearHistory(final String testFilenameSuffix) {
final UserHistoryDictionary dict =
PersonalizationHelper.getUserHistoryDictionary(getContext(),
new Locale(testFilenameSuffix));
dict.clearAndFlushDictionary();
dict.close();
}
/**
* Shut down executer and wait until all operations of user history are done.
* @param testFilenameSuffix file name suffix used for testing.
*/
private void waitForWriting(final String testFilenameSuffix) {
final UserHistoryDictionary dict =
PersonalizationHelper.getUserHistoryDictionary(getContext(),
new Locale(testFilenameSuffix));
dict.waitAllTasksForTests();
}
public void testRandomWords() {
Log.d(TAG, "This test can be used for profiling.");
Log.d(TAG, "Usage: please set UserHistoryDictionary.PROFILE_SAVE_RESTORE to true.");
final String testFilenameSuffix = "test_random_words" + System.currentTimeMillis();
final String fileName = UserHistoryDictionary.NAME + "." + testFilenameSuffix
+ ExpandableBinaryDictionary.DICT_FILE_EXTENSION;
final int numberOfWords = 1000;
final Random random = new Random(123456);
try {
clearHistory(testFilenameSuffix);
addAndWriteRandomWords(testFilenameSuffix, numberOfWords, random,
true /* checksContents */);
} finally {
Log.d(TAG, "waiting for writing ...");
waitForWriting(testFilenameSuffix);
final File dictFile = new File(getContext().getFilesDir(), fileName);
if (dictFile != null) {
assertTrue(dictFile.exists());
dictFile.delete();
}
}
}
public void testStressTestForSwitchingLanguagesAndAddingWords() {
final int numberOfLanguages = 2;
final int numberOfLanguageSwitching = 80;
final int numberOfWordsInsertedForEachLanguageSwitch = 100;
final File dictFiles[] = new File[numberOfLanguages];
final String testFilenameSuffixes[] = new String[numberOfLanguages];
try {
final Random random = new Random(123456);
// Create filename suffixes for this test.
for (int i = 0; i < numberOfLanguages; i++) {
testFilenameSuffixes[i] = "test_switching_languages" + i;
final String fileName = UserHistoryDictionary.NAME + "." + testFilenameSuffixes[i]
+ ExpandableBinaryDictionary.DICT_FILE_EXTENSION;
dictFiles[i] = new File(getContext().getFilesDir(), fileName);
clearHistory(testFilenameSuffixes[i]);
}
final long start = System.currentTimeMillis();
for (int i = 0; i < numberOfLanguageSwitching; i++) {
final int index = i % numberOfLanguages;
// Switch languages to testFilenameSuffixes[index].
addAndWriteRandomWords(testFilenameSuffixes[index],
numberOfWordsInsertedForEachLanguageSwitch, random,
false /* checksContents */);
}
final long end = System.currentTimeMillis();
Log.d(TAG, "testStressTestForSwitchingLanguageAndAddingWords took "
+ (end - start) + " ms");
} finally {
Log.d(TAG, "waiting for writing ...");
for (int i = 0; i < numberOfLanguages; i++) {
waitForWriting(testFilenameSuffixes[i]);
}
for (final File file : dictFiles) {
if (file != null) {
assertTrue(file.exists());
file.delete();
}
}
}
}
public void testAddManyWords() {
final String testFilenameSuffix = "test_random_words" + System.currentTimeMillis();
final int numberOfWords = 10000;
final Random random = new Random(123456);
clearHistory(testFilenameSuffix);
try {
addAndWriteRandomWords(testFilenameSuffix, numberOfWords, random,
true /* checksContents */);
} finally {
Log.d(TAG, "waiting for writing ...");
waitForWriting(testFilenameSuffix);
final String fileName = UserHistoryDictionary.NAME + "." + testFilenameSuffix
+ ExpandableBinaryDictionary.DICT_FILE_EXTENSION;
final File dictFile = new File(getContext().getFilesDir(), fileName);
if (dictFile != null) {
assertTrue(dictFile.exists());
dictFile.delete();
}
}
}
}
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