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/*
* Copyright (C) 2010,2011 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;
import com.android.inputmethod.latin.tests.R;
import android.content.res.AssetFileDescriptor;
import android.text.TextUtils;
import android.util.Slog;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Locale;
import java.util.StringTokenizer;
public class SuggestPerformanceTests extends SuggestTestsBase {
private static final String TAG = SuggestPerformanceTests.class.getSimpleName();
private String mTestText;
private SuggestHelper mHelper;
@Override
protected void setUp() throws Exception {
super.setUp();
final AssetFileDescriptor dict = openTestRawResourceFd(R.raw.test);
mHelper = new SuggestHelper(
getContext(), mTestPackageFile, dict.getStartOffset(), dict.getLength(),
createKeyboardId(Locale.US));
loadString(R.raw.testtext);
}
private void loadString(int testFileId) {
final String testFile = getTestContext().getResources().getResourceName(testFileId);
BufferedReader reader = null;
try {
reader = new BufferedReader(
new InputStreamReader(openTestRawResource(testFileId)));
final StringBuilder sb = new StringBuilder();
String line;
Slog.i(TAG, "Reading test file " + testFile);
while ((line = reader.readLine()) != null) {
sb.append(line);
sb.append(" ");
}
mTestText = sb.toString();
} catch (Exception e) {
Slog.e(TAG, "Can not read " + testFile);
e.printStackTrace();
} finally {
if (reader != null) {
try {
reader.close();
} catch (Exception e) {
Slog.e(TAG, "Closing " + testFile + " failed");
}
}
}
}
/************************** Helper functions ************************/
private int lookForBigramSuggestion(String prevWord, String currentWord) {
for (int i = 1; i < currentWord.length(); i++) {
final CharSequence prefix = currentWord.substring(0, i);
final CharSequence word = (i == 1)
? mHelper.getBigramFirstSuggestion(prevWord, prefix)
: mHelper.getBigramAutoCorrection(prevWord, prefix);
if (TextUtils.equals(word, currentWord))
return i;
}
return currentWord.length();
}
private double runText(boolean withBigrams) {
mHelper.setCorrectionMode(
withBigrams ? Suggest.CORRECTION_FULL_BIGRAM : Suggest.CORRECTION_FULL);
StringTokenizer st = new StringTokenizer(mTestText);
String prevWord = null;
int typeCount = 0;
int characterCount = 0; // without space
int wordCount = 0;
while (st.hasMoreTokens()) {
String currentWord = st.nextToken();
boolean endCheck = false;
if (currentWord.matches("[\\w]*[\\.|?|!|*|@|&|/|:|;]")) {
currentWord = currentWord.substring(0, currentWord.length() - 1);
endCheck = true;
}
if (withBigrams && prevWord != null) {
typeCount += lookForBigramSuggestion(prevWord, currentWord);
} else {
typeCount += lookForBigramSuggestion(null, currentWord);
}
characterCount += currentWord.length();
if (!endCheck) prevWord = currentWord;
wordCount++;
}
double result = (double) (characterCount - typeCount) / characterCount * 100;
if (withBigrams) {
Slog.i(TAG, "with bigrams -> " + result + " % saved!");
} else {
Slog.i(TAG, "without bigrams -> " + result + " % saved!");
}
Slog.i(TAG, "\ttotal number of words: " + wordCount);
Slog.i(TAG, "\ttotal number of characters: " + mTestText.length());
Slog.i(TAG, "\ttotal number of characters without space: " + characterCount);
Slog.i(TAG, "\ttotal number of characters typed: " + typeCount);
return result;
}
/************************** Performance Tests ************************/
/**
* Compare the Suggest with and without bigram
* Check the log for detail
*/
public void testSuggestPerformance() {
assertTrue(runText(false) <= runText(true));
}
}
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