Refactor on UserHistoryDictionary

Bug: 9429906
Change-Id: I576a91643bdaf5017cc826ac2e07a74a9a275d60

1 files changed, 171 insertions, 0 deletions

diff --git a/tests/src/com/android/inputmethod/latin/personalization/UserHistoryDictionaryTests.java b/tests/src/com/android/inputmethod/latin/personalization/UserHistoryDictionaryTests.java
new file mode 100644
index 000000000..48eb08a75
--- /dev/null
+++ b/tests/src/com/android/inputmethod/latin/personalization/UserHistoryDictionaryTests.java
@@ -0,0 +1,171 @@
+/*
+ * 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 UserHistoryDictionary 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 UserHistoryDictionary dict = UserHistoryDictionary.getInstance(getContext(),
+                    locale, mPrefs);
+            dict.isTest = 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 UserHistoryDictionary dict = UserHistoryDictionary.getInstance(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();
+                }
+            }
+        }
+    }
+}