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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.content.SharedPreferences;
import android.preference.PreferenceManager;
import android.test.AndroidTestCase;
import android.test.suitebuilder.annotation.LargeTest;
import android.util.Log;
import com.android.inputmethod.latin.utils.CollectionUtils;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.Set;
/**
* Unit tests for UserHistoryDictionary
*/
@LargeTest
public class UserHistoryDictionaryTests extends AndroidTestCase {
private static final String TAG = UserHistoryDictionaryTests.class.getSimpleName();
private SharedPreferences mPrefs;
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"
};
@Override
public void setUp() {
mPrefs = PreferenceManager.getDefaultSharedPreferences(getContext());
}
/**
* 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 UserHistoryPredictionDictionary dict, final List<String> words) {
String prevWord = null;
for (String word : words) {
dict.forceAddWordForTest(prevWord, word, true);
prevWord = word;
}
}
public void testRandomWords() {
File dictFile = null;
try {
Log.d(TAG, "This test can be used for profiling.");
Log.d(TAG, "Usage: please set UserHistoryDictionary.PROFILE_SAVE_RESTORE to true.");
final int numberOfWords = 1000;
final Random random = new Random(123456);
List<String> words = generateWords(numberOfWords, random);
final String locale = "testRandomWords";
final String fileName = "UserHistoryDictionary." + locale + ".dict";
dictFile = new File(getContext().getFilesDir(), fileName);
final UserHistoryPredictionDictionary dict =
PersonalizationDictionaryHelper.getUserHistoryPredictionDictionary(
getContext(), locale, mPrefs);
dict.mIsTest = true;
addToDict(dict, words);
try {
Log.d(TAG, "waiting for adding the word ...");
Thread.sleep(2000);
} catch (InterruptedException e) {
Log.d(TAG, "InterruptedException: " + e);
}
// write to file
dict.close();
try {
Log.d(TAG, "waiting for writing ...");
Thread.sleep(5000);
} catch (InterruptedException e) {
Log.d(TAG, "InterruptedException: " + e);
}
} finally {
if (dictFile != null) {
dictFile.delete();
}
}
}
public void testStressTestForSwitchingLanguagesAndAddingWords() {
final int numberOfLanguages = 2;
final int numberOfLanguageSwitching = 100;
final int numberOfWordsIntertedForEachLanguageSwitch = 100;
final File dictFiles[] = new File[numberOfLanguages];
try {
final Random random = new Random(123456);
// Create locales for this test.
String locales[] = new String[numberOfLanguages];
for (int i = 0; i < numberOfLanguages; i++) {
locales[i] = "testSwitchingLanguages" + i;
final String fileName = "UserHistoryDictionary." + locales[i] + ".dict";
dictFiles[i] = new File(getContext().getFilesDir(), fileName);
}
final long now = System.currentTimeMillis();
for (int i = 0; i < numberOfLanguageSwitching; i++) {
final int index = i % numberOfLanguages;
// Switch languages to locales[index].
final UserHistoryPredictionDictionary dict =
PersonalizationDictionaryHelper.getUserHistoryPredictionDictionary(
getContext(), locales[index], mPrefs);
final List<String> words = generateWords(
numberOfWordsIntertedForEachLanguageSwitch, random);
// Add random words to the user history dictionary.
addToDict(dict, words);
// write to file
dict.close();
}
final long end = System.currentTimeMillis();
Log.d(TAG, "testStressTestForSwitchingLanguageAndAddingWords took "
+ (end - now) + " ms");
try {
Log.d(TAG, "waiting for writing ...");
Thread.sleep(5000);
} catch (InterruptedException e) {
Log.d(TAG, "InterruptedException: " + e);
}
} finally {
for (final File file : dictFiles) {
if (file != null) {
file.delete();
}
}
}
}
}
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