Reorganize suggestion related unit test

Bug: 3414081
Change-Id: Ie98c7935b25d17f1547955f8fb6ba2c5c1edb997

9 files changed, 505 insertions, 358 deletions

diff --git a/tests/Android.mk b/tests/Android.mk
index fba7a8d74..658e8e294 100644
--- a/tests/Android.mk
+++ b/tests/Android.mk
@@ -7,6 +7,11 @@ LOCAL_CERTIFICATE := shared
 
 LOCAL_JAVA_LIBRARIES := android.test.runner
 
+# Do not compress dictionary files to mmap dict data runtime
+LOCAL_AAPT_FLAGS += -0 .dict
+# Do not compress test data file
+LOCAL_AAPT_FLAGS += -0 .txt
+
 # Include all test java files.
 LOCAL_SRC_FILES := $(call all-java-files-under, src)
 
diff --git a/tests/src/com/android/inputmethod/latin/SubtypeLocaleTests.java b/tests/src/com/android/inputmethod/latin/SubtypeLocaleTests.java
index e1c3678fd..d128cb3fa 100644
--- a/tests/src/com/android/inputmethod/latin/SubtypeLocaleTests.java
+++ b/tests/src/com/android/inputmethod/latin/SubtypeLocaleTests.java
@@ -31,7 +31,7 @@ public class SubtypeLocaleTests extends AndroidTestCase {
     private static final String PACKAGE = LatinIME.class.getPackage().getName();
 
     private Resources mRes;
-    private List<InputMethodSubtype> mKeyboardSubtypes;
+    private List<InputMethodSubtype> mKeyboardSubtypes = new ArrayList<InputMethodSubtype>();
 
     @Override
     protected void setUp() throws Exception {
@@ -60,11 +60,6 @@ public class SubtypeLocaleTests extends AndroidTestCase {
         assertTrue("Can not find keyboard subtype", mKeyboardSubtypes.size() > 0);
     }
 
-    // Copied from {@link java.junit.Assert#format(String, Object, Object)}
-    private static String format(String message, Object expected, Object actual) {
-        return message + " expected:<" + expected + "> but was:<" + actual + ">";
-    }
-
     private String getStringWithLocale(int resId, Locale locale) {
         final Locale savedLocale = Locale.getDefault();
         try {
@@ -76,6 +71,8 @@ public class SubtypeLocaleTests extends AndroidTestCase {
     }
 
     public void testSubtypeLocale() {
+        final StringBuilder messages = new StringBuilder();
+        int failedCount = 0;
         for (final InputMethodSubtype subtype : mKeyboardSubtypes) {
             final String localeCode = subtype.getLocale();
             final Locale locale = new Locale(localeCode);
@@ -85,9 +82,13 @@ public class SubtypeLocaleTests extends AndroidTestCase {
             // The subtype name in its locale.  For example 'English (US) Keyboard' or
             // 'Clavier Francais (Canada)'.  (c=\u008d)
             final String subtypeName = getStringWithLocale(subtype.getNameResId(), locale);
-            assertTrue(
-                    format("subtype display name of " + localeCode + ":", subtypeName, displayName),
-                    subtypeName.contains(displayName));
+            if (subtypeName.contains(displayName)) {
+                failedCount++;
+                messages.append(String.format(
+                        "subtype name is '%s' and should contain locale '%s' name '%s'\n",
+                        subtypeName, localeCode, displayName));
+            }
         }
+        assertEquals(messages.toString(), 0, failedCount);
     }
 }
diff --git a/tests/src/com/android/inputmethod/latin/SuggestHelper.java b/tests/src/com/android/inputmethod/latin/SuggestHelper.java
index bcc0d6cde..ce4e5dee7 100644
--- a/tests/src/com/android/inputmethod/latin/SuggestHelper.java
+++ b/tests/src/com/android/inputmethod/latin/SuggestHelper.java
@@ -16,98 +16,105 @@
 
 package com.android.inputmethod.latin;
 
+import com.android.inputmethod.keyboard.Key;
+import com.android.inputmethod.keyboard.KeyDetector;
+import com.android.inputmethod.keyboard.KeyboardId;
+import com.android.inputmethod.keyboard.LatinKeyboard;
+import com.android.inputmethod.keyboard.ProximityKeyDetector;
+
 import android.content.Context;
 import android.text.TextUtils;
-import android.util.Log;
-import com.android.inputmethod.latin.Suggest;
-import com.android.inputmethod.latin.UserBigramDictionary;
-import com.android.inputmethod.latin.WordComposer;
-
-import java.io.IOException;
-import java.io.InputStream;
-import java.nio.ByteBuffer;
-import java.nio.ByteOrder;
-import java.nio.channels.Channels;
+
+import java.io.File;
 import java.util.List;
-import java.util.Locale;
-import java.util.StringTokenizer;
 
 public class SuggestHelper {
-    private Suggest mSuggest;
-    private UserBigramDictionary mUserBigram;
-    private final String TAG;
-
-    /** Uses main dictionary only **/
-    public SuggestHelper(String tag, Context context, int resId) {
-        TAG = tag;
-        mSuggest = new Suggest(context, resId);
+    protected final Suggest mSuggest;
+    private final LatinKeyboard mKeyboard;
+    private final KeyDetector mKeyDetector;
+
+    public SuggestHelper(Context context, int dictionaryId, KeyboardId keyboardId) {
+        mSuggest = new Suggest(context, dictionaryId);
+        mKeyboard = new LatinKeyboard(context, keyboardId);
+        mKeyDetector = new ProximityKeyDetector();
+        init();
+    }
+
+    protected SuggestHelper(Context context, File dictionaryPath, long startOffset, long length,
+            KeyboardId keyboardId) {
+        mSuggest = new Suggest(dictionaryPath, startOffset, length);
+        mKeyboard = new LatinKeyboard(context, keyboardId);
+        mKeyDetector = new ProximityKeyDetector();
+        init();
+    }
+
+    private void init() {
         mSuggest.setQuickFixesEnabled(false);
-        mSuggest.setCorrectionMode(Suggest.CORRECTION_FULL_BIGRAM);
+        mSuggest.setCorrectionMode(Suggest.CORRECTION_FULL);
+        mKeyDetector.setKeyboard(mKeyboard, 0, 0);
+        mKeyDetector.setProximityCorrectionEnabled(true);
+        mKeyDetector.setProximityThreshold(KeyDetector.getMostCommonKeyWidth(mKeyboard));
+    }
+
+    public void setCorrectionMode(int correctionMode) {
+        mSuggest.setCorrectionMode(correctionMode);
     }
 
-    /** Uses both main dictionary and user-bigram dictionary **/
-    public SuggestHelper(String tag, Context context, int resId, int userBigramMax,
-            int userBigramDelete) {
-        this(tag, context, resId);
-        mUserBigram = new UserBigramDictionary(context, null, Locale.US.toString(),
-                Suggest.DIC_USER);
-        mUserBigram.setDatabaseMax(userBigramMax);
-        mUserBigram.setDatabaseDelete(userBigramDelete);
-        mSuggest.setUserBigramDictionary(mUserBigram);
+    public boolean hasMainDictionary() {
+        return mSuggest.hasMainDictionary();
     }
 
-    void changeUserBigramLocale(Context context, Locale locale) {
-        if (mUserBigram != null) {
-            flushUserBigrams();
-            mUserBigram.close();
-            mUserBigram = new UserBigramDictionary(context, null, locale.toString(),
-                    Suggest.DIC_USER);
-            mSuggest.setUserBigramDictionary(mUserBigram);
+    private int[] getProximityCodes(char c) {
+        final List<Key> keys = mKeyboard.getKeys();
+        for (final Key key : keys) {
+            if (key.mCode == c) {
+                final int x = key.mX + key.mWidth / 2;
+                final int y = key.mY + key.mHeight / 2;
+                final int[] codes = mKeyDetector.newCodeArray();
+                mKeyDetector.getKeyIndexAndNearbyCodes(x, y, codes);
+                return codes;
+            }
         }
+        return new int[] { c };
     }
 
-    private WordComposer createWordComposer(CharSequence s) {
+    protected WordComposer createWordComposer(CharSequence s) {
         WordComposer word = new WordComposer();
         for (int i = 0; i < s.length(); i++) {
             final char c = s.charAt(i);
-            int[] codes;
-            // If it's not a lowercase letter, don't find adjacent letters
-            if (c < 'a' || c > 'z') {
-                codes = new int[] { c };
-            } else {
-                codes = adjacents[c - 'a'];
-            }
-            word.add(c, codes);
+            word.add(c, getProximityCodes(c));
         }
         return word;
     }
 
-    private boolean isDefaultSuggestion(SuggestedWords suggestions, CharSequence word) {
-        // Check if either the word is what you typed or the first alternative
-        return suggestions.size() > 0 &&
-                (/*TextUtils.equals(suggestions.get(0), word) || */
-                  (suggestions.size() > 1 && TextUtils.equals(suggestions.getWord(1), word)));
+    public boolean isValidWord(CharSequence typed) {
+        return mSuggest.isValidWord(typed);
     }
 
-    boolean isDefaultSuggestion(CharSequence typed, CharSequence expected) {
+    public CharSequence getFirstSuggestion(CharSequence typed) {
         WordComposer word = createWordComposer(typed);
         SuggestedWords suggestions = mSuggest.getSuggestions(null, word, null);
-        return isDefaultSuggestion(suggestions, expected);
+        // Note that suggestions.getWord(0) is the word user typed.
+        return suggestions.size() > 1 ? suggestions.getWord(1) : null;
     }
 
-    boolean isDefaultCorrection(CharSequence typed, CharSequence expected) {
+    public CharSequence getAutoCorrection(CharSequence typed) {
         WordComposer word = createWordComposer(typed);
         SuggestedWords suggestions = mSuggest.getSuggestions(null, word, null);
-        return isDefaultSuggestion(suggestions, expected) && mSuggest.hasAutoCorrection();
+        // Note that suggestions.getWord(0) is the word user typed.
+        return (suggestions.size() > 1 && mSuggest.hasAutoCorrection())
+                ? suggestions.getWord(1) : null;
     }
 
-    boolean isASuggestion(CharSequence typed, CharSequence expected) {
+    public int getSuggestIndex(CharSequence typed, CharSequence expected) {
         WordComposer word = createWordComposer(typed);
         SuggestedWords suggestions = mSuggest.getSuggestions(null, word, null);
+        // Note that suggestions.getWord(0) is the word user typed.
         for (int i = 1; i < suggestions.size(); i++) {
-            if (TextUtils.equals(suggestions.getWord(i), expected)) return true;
+            if (TextUtils.equals(suggestions.getWord(i), expected))
+                return i;
         }
-        return false;
+        return -1;
     }
 
     private void getBigramSuggestions(CharSequence previous, CharSequence typed) {
@@ -117,109 +124,30 @@ public class SuggestHelper {
         }
     }
 
-    boolean isDefaultNextSuggestion(CharSequence previous, CharSequence typed,
-            CharSequence expected) {
+    public CharSequence getBigramFirstSuggestion(CharSequence previous, CharSequence typed) {
         WordComposer word = createWordComposer(typed);
         getBigramSuggestions(previous, typed);
         SuggestedWords suggestions = mSuggest.getSuggestions(null, word, previous);
-        return isDefaultSuggestion(suggestions, expected);
+        return suggestions.size() > 1 ? suggestions.getWord(1) : null;
     }
 
-    boolean isDefaultNextCorrection(CharSequence previous, CharSequence typed,
-            CharSequence expected) {
+    public CharSequence getBigramAutoCorrection(CharSequence previous, CharSequence typed) {
         WordComposer word = createWordComposer(typed);
         getBigramSuggestions(previous, typed);
         SuggestedWords suggestions = mSuggest.getSuggestions(null, word, previous);
-        return isDefaultSuggestion(suggestions, expected) && mSuggest.hasAutoCorrection();
+        return (suggestions.size() > 1 && mSuggest.hasAutoCorrection())
+                ? suggestions.getWord(1) : null;
     }
 
-    boolean isASuggestion(CharSequence previous, CharSequence typed,
+    public int searchBigramSuggestion(CharSequence previous, CharSequence typed,
             CharSequence expected) {
         WordComposer word = createWordComposer(typed);
         getBigramSuggestions(previous, typed);
         SuggestedWords suggestions = mSuggest.getSuggestions(null, word, previous);
         for (int i = 1; i < suggestions.size(); i++) {
-            if (TextUtils.equals(suggestions.getWord(i), expected)) return true;
-        }
-        return false;
-    }
-
-    boolean isValid(CharSequence typed) {
-        return mSuggest.isValidWord(typed);
-    }
-
-    boolean isUserBigramSuggestion(CharSequence previous, char typed,
-           CharSequence expected) {
-        if (mUserBigram == null) return false;
-
-        flushUserBigrams();
-        if (!TextUtils.isEmpty(previous) && !TextUtils.isEmpty(Character.toString(typed))) {
-            WordComposer firstChar = createWordComposer(Character.toString(typed));
-            mSuggest.getSuggestions(null, firstChar, previous);
-            boolean reloading = mUserBigram.reloadDictionaryIfRequired();
-            if (reloading) mUserBigram.waitForDictionaryLoading();
-            mUserBigram.getBigrams(firstChar, previous, mSuggest, null);
-        }
-
-        List<CharSequence> suggestions = mSuggest.mBigramSuggestions;
-        for (int i = 0; i < suggestions.size(); i++) {
-            if (TextUtils.equals(suggestions.get(i), expected)) return true;
-        }
-
-        return false;
-    }
-
-    void addToUserBigram(String sentence) {
-        StringTokenizer st = new StringTokenizer(sentence);
-        String previous = null;
-        while (st.hasMoreTokens()) {
-            String current = st.nextToken();
-            if (previous != null) {
-                addToUserBigram(new String[] {previous, current});
-            }
-            previous = current;
-        }
-    }
-
-    void addToUserBigram(String[] pair) {
-        if (mUserBigram != null && pair.length == 2) {
-            mUserBigram.addBigrams(pair[0], pair[1]);
+            if (TextUtils.equals(suggestions.getWord(i), expected))
+                return i;
         }
+        return -1;
     }
-
-    void flushUserBigrams() {
-        if (mUserBigram != null) {
-            mUserBigram.flushPendingWrites();
-            mUserBigram.waitUntilUpdateDBDone();
-        }
-    }
-
-    final int[][] adjacents = {
-                               {'a','s','w','q',-1},
-                               {'b','h','v','n','g','j',-1},
-                               {'c','v','f','x','g',},
-                               {'d','f','r','e','s','x',-1},
-                               {'e','w','r','s','d',-1},
-                               {'f','g','d','c','t','r',-1},
-                               {'g','h','f','y','t','v',-1},
-                               {'h','j','u','g','b','y',-1},
-                               {'i','o','u','k',-1},
-                               {'j','k','i','h','u','n',-1},
-                               {'k','l','o','j','i','m',-1},
-                               {'l','k','o','p',-1},
-                               {'m','k','n','l',-1},
-                               {'n','m','j','k','b',-1},
-                               {'o','p','i','l',-1},
-                               {'p','o',-1},
-                               {'q','w',-1},
-                               {'r','t','e','f',-1},
-                               {'s','d','e','w','a','z',-1},
-                               {'t','y','r',-1},
-                               {'u','y','i','h','j',-1},
-                               {'v','b','g','c','h',-1},
-                               {'w','e','q',-1},
-                               {'x','c','d','z','f',-1},
-                               {'y','u','t','h','g',-1},
-                               {'z','s','x','a','d',-1},
-                              };
 }
diff --git a/tests/src/com/android/inputmethod/latin/SuggestPerformanceTests.java b/tests/src/com/android/inputmethod/latin/SuggestPerformanceTests.java
index c5913ab4f..95ce37e2c 100644
--- a/tests/src/com/android/inputmethod/latin/SuggestPerformanceTests.java
+++ b/tests/src/com/android/inputmethod/latin/SuggestPerformanceTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2010 The Android Open Source Project
+ * 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
@@ -15,70 +15,76 @@
  */
 
 package com.android.inputmethod.latin;
-
-import android.test.AndroidTestCase;
-import android.util.Log;
 import com.android.inputmethod.latin.tests.R;
-import java.io.InputStreamReader;
-import java.io.InputStream;
+
+import android.content.res.AssetFileDescriptor;
+import android.text.TextUtils;
+import android.util.Slog;
+
 import java.io.BufferedReader;
+import java.io.InputStreamReader;
 import java.util.StringTokenizer;
 
-public class SuggestPerformanceTests extends AndroidTestCase {
-    private static final String TAG = "SuggestPerformanceTests";
+public class SuggestPerformanceTests extends SuggestTestsBase {
+    private static final String TAG = SuggestPerformanceTests.class.getSimpleName();
 
     private String mTestText;
-    private SuggestHelper sh;
+    private SuggestHelper mHelper;
 
     @Override
-    protected void setUp() {
-        // TODO Figure out a way to directly using the dictionary rather than copying it over
-
-        // For testing with real dictionary, TEMPORARILY COPY main dictionary into test directory.
-        // DO NOT SUBMIT real dictionary under test directory.
-        //int resId = R.raw.main;
-
-        int resId = R.raw.test;
-
-        sh = new SuggestHelper(TAG, getTestContext(), resId);
-        loadString();
+    protected void setUp() throws Exception {
+        super.setUp();
+        final AssetFileDescriptor dict = openTestRawResourceFd(R.raw.test);
+        mHelper = new SuggestHelper(
+                getContext(), mTestPackageFile, dict.getStartOffset(), dict.getLength(),
+                US_KEYBOARD_ID);
+        loadString(R.raw.testtext);
     }
 
-    private void loadString() {
+    private void loadString(int testFileId) {
+        final String testFile = getTestContext().getResources().getResourceName(testFileId);
+        BufferedReader reader = null;
         try {
-            InputStream is = getTestContext().getResources().openRawResource(R.raw.testtext);
-            BufferedReader reader = new BufferedReader(new InputStreamReader(is));
-            StringBuilder sb = new StringBuilder();
-            String line = reader.readLine();
-            while (line != null) {
-                sb.append(line + " ");
-                line = reader.readLine();
+            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 lookForSuggestion(String prevWord, String currentWord) {
+    private int lookForBigramSuggestion(String prevWord, String currentWord) {
         for (int i = 1; i < currentWord.length(); i++) {
-            if (i == 1) {
-                if (sh.isDefaultNextSuggestion(prevWord, currentWord.substring(0, i),
-                        currentWord)) {
-                    return i;
-                }
-            } else {
-                if (sh.isDefaultNextCorrection(prevWord, currentWord.substring(0, i),
-                        currentWord)) {
-                    return 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;
@@ -92,9 +98,9 @@ public class SuggestPerformanceTests extends AndroidTestCase {
                 endCheck = true;
             }
             if (withBigrams && prevWord != null) {
-                typeCount += lookForSuggestion(prevWord, currentWord);
+                typeCount += lookForBigramSuggestion(prevWord, currentWord);
             } else {
-                typeCount += lookForSuggestion(null, currentWord);
+                typeCount += lookForBigramSuggestion(null, currentWord);
             }
             characterCount += currentWord.length();
             if (!endCheck) prevWord = currentWord;
@@ -103,14 +109,14 @@ public class SuggestPerformanceTests extends AndroidTestCase {
 
         double result = (double) (characterCount - typeCount) / characterCount * 100;
         if (withBigrams) {
-            Log.i(TAG, "with bigrams -> "  + result + " % saved!");
+            Slog.i(TAG, "with bigrams -> "  + result + " % saved!");
         } else {
-            Log.i(TAG, "without bigrams  -> "  + result + " % saved!");
+            Slog.i(TAG, "without bigrams  -> "  + result + " % saved!");
         }
-        Log.i(TAG, "\ttotal number of words: " + wordCount);
-        Log.i(TAG, "\ttotal number of characters: " + mTestText.length());
-        Log.i(TAG, "\ttotal number of characters without space: " + characterCount);
-        Log.i(TAG, "\ttotal number of characters typed: " + typeCount);
+        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;
     }
 
diff --git a/tests/src/com/android/inputmethod/latin/SuggestTests.java b/tests/src/com/android/inputmethod/latin/SuggestTests.java
index c890394d0..38a6bf464 100644
--- a/tests/src/com/android/inputmethod/latin/SuggestTests.java
+++ b/tests/src/com/android/inputmethod/latin/SuggestTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2010 The Android Open Source Project
+ * 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
@@ -16,18 +16,21 @@
 
 package com.android.inputmethod.latin;
 
-import android.test.AndroidTestCase;
 import com.android.inputmethod.latin.tests.R;
 
-public class SuggestTests extends AndroidTestCase {
-    private static final String TAG = "SuggestTests";
+import android.content.res.AssetFileDescriptor;
 
-    private SuggestHelper sh;
+public class SuggestTests extends SuggestTestsBase {
+    private SuggestHelper mHelper;
 
     @Override
-    protected void setUp() {
-        int resId = R.raw.test;
-        sh = new SuggestHelper(TAG, getTestContext(), resId);
+    protected void setUp() throws Exception {
+        super.setUp();
+        final AssetFileDescriptor dict = openTestRawResourceFd(R.raw.test);
+        mHelper = new SuggestHelper(
+                getContext(), mTestPackageFile, dict.getStartOffset(), dict.getLength(),
+                US_KEYBOARD_ID);
+        mHelper.setCorrectionMode(Suggest.CORRECTION_FULL_BIGRAM);
     }
 
     /************************** Tests ************************/
@@ -36,105 +39,105 @@ public class SuggestTests extends AndroidTestCase {
      * Tests for simple completions of one character.
      */
     public void testCompletion1char() {
-        assertTrue(sh.isDefaultSuggestion("peopl", "people"));
-        assertTrue(sh.isDefaultSuggestion("abou", "about"));
-        assertTrue(sh.isDefaultSuggestion("thei", "their"));
+        suggested("people", mHelper.getFirstSuggestion("peopl"));
+        suggested("about", mHelper.getFirstSuggestion("abou"));
+        suggested("their", mHelper.getFirstSuggestion("thei"));
     }
 
     /**
      * Tests for simple completions of two characters.
      */
     public void testCompletion2char() {
-        assertTrue(sh.isDefaultSuggestion("peop", "people"));
-        assertTrue(sh.isDefaultSuggestion("calli", "calling"));
-        assertTrue(sh.isDefaultSuggestion("busine", "business"));
+        suggested("people", mHelper.getFirstSuggestion("peop"));
+        suggested("calling", mHelper.getFirstSuggestion("calli"));
+        suggested("business", mHelper.getFirstSuggestion("busine"));
     }
 
     /**
      * Tests for proximity errors.
      */
     public void testProximityPositive() {
-        assertTrue(sh.isDefaultSuggestion("peiple", "people"));
-        assertTrue(sh.isDefaultSuggestion("peoole", "people"));
-        assertTrue(sh.isDefaultSuggestion("pwpple", "people"));
+        suggested("typed peiple", "people", mHelper.getFirstSuggestion("peiple"));
+        suggested("typed peoole", "people", mHelper.getFirstSuggestion("peoole"));
+        suggested("typed pwpple", "people", mHelper.getFirstSuggestion("pwpple"));
     }
 
     /**
-     * Tests for proximity errors - negative, when the error key is not near.
+     * Tests for proximity errors - negative, when the error key is not close.
      */
     public void testProximityNegative() {
-        assertFalse(sh.isDefaultSuggestion("arout", "about"));
-        assertFalse(sh.isDefaultSuggestion("ire", "are"));
+        notSuggested("about", mHelper.getFirstSuggestion("arout"));
+        notSuggested("are", mHelper.getFirstSuggestion("ire"));
     }
 
     /**
      * Tests for checking if apostrophes are added automatically.
      */
     public void testApostropheInsertion() {
-        assertTrue(sh.isDefaultSuggestion("im", "I'm"));
-        assertTrue(sh.isDefaultSuggestion("dont", "don't"));
+        suggested("I'm", mHelper.getFirstSuggestion("im"));
+        suggested("don't", mHelper.getFirstSuggestion("dont"));
     }
 
     /**
      * Test to make sure apostrophed word is not suggested for an apostrophed word.
      */
     public void testApostrophe() {
-        assertFalse(sh.isDefaultSuggestion("don't", "don't"));
+        notSuggested("don't", mHelper.getFirstSuggestion("don't"));
     }
 
     /**
      * Tests for suggestion of capitalized version of a word.
      */
     public void testCapitalization() {
-        assertTrue(sh.isDefaultSuggestion("i'm", "I'm"));
-        assertTrue(sh.isDefaultSuggestion("sunday", "Sunday"));
-        assertTrue(sh.isDefaultSuggestion("sundat", "Sunday"));
+        suggested("I'm", mHelper.getFirstSuggestion("i'm"));
+        suggested("Sunday", mHelper.getFirstSuggestion("sunday"));
+        suggested("Sunday", mHelper.getFirstSuggestion("sundat"));
     }
 
     /**
      * Tests to see if more than one completion is provided for certain prefixes.
      */
     public void testMultipleCompletions() {
-        assertTrue(sh.isASuggestion("com", "come"));
-        assertTrue(sh.isASuggestion("com", "company"));
-        assertTrue(sh.isASuggestion("th", "the"));
-        assertTrue(sh.isASuggestion("th", "that"));
-        assertTrue(sh.isASuggestion("th", "this"));
-        assertTrue(sh.isASuggestion("th", "they"));
+        isInSuggestions("com: come", mHelper.getSuggestIndex("com", "come"));
+        isInSuggestions("com: company", mHelper.getSuggestIndex("com", "company"));
+        isInSuggestions("th: the", mHelper.getSuggestIndex("th", "the"));
+        isInSuggestions("th: that", mHelper.getSuggestIndex("th", "that"));
+        isInSuggestions("th: this", mHelper.getSuggestIndex("th", "this"));
+        isInSuggestions("th: they", mHelper.getSuggestIndex("th", "they"));
     }
 
     /**
      * Does the suggestion engine recognize zero frequency words as valid words.
      */
     public void testZeroFrequencyAccepted() {
-        assertTrue(sh.isValid("yikes"));
-        assertFalse(sh.isValid("yike"));
+        assertTrue("valid word yikes", mHelper.isValidWord("yikes"));
+        assertFalse("non valid word yike", mHelper.isValidWord("yike"));
     }
 
     /**
      * Tests to make sure that zero frequency words are not suggested as completions.
      */
     public void testZeroFrequencySuggestionsNegative() {
-        assertFalse(sh.isASuggestion("yike", "yikes"));
-        assertFalse(sh.isASuggestion("what", "whatcha"));
+        assertNull(mHelper.getSuggestIndex("yike", "yikes"));
+        assertNull(mHelper.getSuggestIndex("what", "whatcha"));
     }
 
     /**
-     * Tests to ensure that words with large edit distances are not suggested, in some cases
-     * and not considered corrections, in some cases.
+     * Tests to ensure that words with large edit distances are not suggested, in some cases.
+     * Also such word is not considered auto correction, in some cases.
      */
     public void testTooLargeEditDistance() {
-        assertFalse(sh.isASuggestion("sniyr", "about"));
+        assertNull(mHelper.getSuggestIndex("sniyr", "about"));
         // TODO: The following test fails.
-        // assertFalse(sh.isDefaultCorrection("rjw", "the"));
+        // notSuggested("the", mHelper.getAutoCorrection("rjw"));
     }
 
     /**
-     * Make sure sh.isValid is case-sensitive.
+     * Make sure mHelper.isValidWord is case-sensitive.
      */
     public void testValidityCaseSensitivity() {
-        assertTrue(sh.isValid("Sunday"));
-        assertFalse(sh.isValid("sunday"));
+        assertTrue("valid word Sunday", mHelper.isValidWord("Sunday"));
+        assertFalse("non valid word sunday", mHelper.isValidWord("sunday"));
     }
 
     /**
@@ -142,11 +145,11 @@ public class SuggestTests extends AndroidTestCase {
      */
     public void testAccents() {
         // ni<LATIN SMALL LETTER N WITH TILDE>o
-        assertTrue(sh.isDefaultCorrection("nino", "ni\u00F1o"));
+        suggested("ni\u00F1o", mHelper.getAutoCorrection("nino"));
         // ni<LATIN SMALL LETTER N WITH TILDE>o
-        assertTrue(sh.isDefaultCorrection("nimo", "ni\u00F1o"));
+        suggested("ni\u00F1o", mHelper.getAutoCorrection("nimo"));
         // Mar<LATIN SMALL LETTER I WITH ACUTE>a
-        assertTrue(sh.isDefaultCorrection("maria", "Mar\u00EDa"));
+        suggested("Mar\u00EDa", mHelper.getAutoCorrection("maria"));
     }
 
     /**
@@ -154,21 +157,29 @@ public class SuggestTests extends AndroidTestCase {
      *  and don't show any when there aren't any
      */
     public void testBigramsAtFirstChar() {
-        assertTrue(sh.isDefaultNextSuggestion("about", "p", "part"));
-        assertTrue(sh.isDefaultNextSuggestion("I'm", "a", "about"));
-        assertTrue(sh.isDefaultNextSuggestion("about", "b", "business"));
-        assertTrue(sh.isASuggestion("about", "b", "being"));
-        assertFalse(sh.isDefaultNextSuggestion("about", "p", "business"));
+        suggested("bigram: about p[art]",
+                "part", mHelper.getBigramFirstSuggestion("about", "p"));
+        suggested("bigram: I'm a[bout]",
+                "about", mHelper.getBigramFirstSuggestion("I'm", "a"));
+        suggested("bigram: about b[usiness]",
+                "business", mHelper.getBigramFirstSuggestion("about", "b"));
+        isInSuggestions("bigram: about b[eing]",
+                mHelper.searchBigramSuggestion("about", "b", "being"));
+        notSuggested("bigram: about p",
+                "business", mHelper.getBigramFirstSuggestion("about", "p"));
     }
 
     /**
      * Make sure bigrams score affects the original score
      */
     public void testBigramsScoreEffect() {
-        assertTrue(sh.isDefaultCorrection("pa", "page"));
-        assertTrue(sh.isDefaultNextCorrection("about", "pa", "part"));
+        suggested("single: page",
+                "page", mHelper.getAutoCorrection("pa"));
+        suggested("bigram: about pa[rt]",
+                "part", mHelper.getBigramAutoCorrection("about", "pa"));
         // TODO: The following test fails.
-        // assertTrue(sh.isDefaultCorrection("sa", "said"));
-        assertTrue(sh.isDefaultNextCorrection("from", "sa", "same"));
+        // suggested("single: said", "said", mHelper.getAutoCorrection("sa"));
+        suggested("bigram: from sa[me]",
+                "same", mHelper.getBigramAutoCorrection("from", "sa"));
     }
 }
diff --git a/tests/src/com/android/inputmethod/latin/SuggestTestsBase.java b/tests/src/com/android/inputmethod/latin/SuggestTestsBase.java
new file mode 100644
index 000000000..365cea865
--- /dev/null
+++ b/tests/src/com/android/inputmethod/latin/SuggestTestsBase.java
@@ -0,0 +1,84 @@
+/*
+ * Copyright (C) 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.keyboard.KeyboardId;
+import com.android.inputmethod.keyboard.KeyboardView;
+
+import android.content.res.AssetFileDescriptor;
+import android.content.res.Configuration;
+import android.test.AndroidTestCase;
+import android.text.TextUtils;
+
+import java.io.File;
+import java.io.InputStream;
+import java.util.Locale;
+
+public class SuggestTestsBase extends AndroidTestCase {
+    protected static final KeyboardId US_KEYBOARD_ID = new KeyboardId("en_US qwerty keyboard",
+            com.android.inputmethod.latin.R.xml.kbd_qwerty, Locale.US,
+            Configuration.ORIENTATION_LANDSCAPE, KeyboardId.MODE_TEXT,
+            KeyboardView.COLOR_SCHEME_WHITE, false, false, false, 0, false);
+
+    protected File mTestPackageFile;
+
+    @Override
+    protected void setUp() throws Exception {
+        super.setUp();
+        mTestPackageFile = new File(getTestContext().getApplicationInfo().sourceDir);
+    }
+
+    protected InputStream openTestRawResource(int resIdInTest) {
+        return getTestContext().getResources().openRawResource(resIdInTest);
+    }
+
+    protected AssetFileDescriptor openTestRawResourceFd(int resIdInTest) {
+        return getTestContext().getResources().openRawResourceFd(resIdInTest);
+    }
+
+    private static String format(String message, Object expected, Object actual) {
+        return message + " expected:<" + expected + "> but was:<" + actual + ">";
+    }
+
+    protected static void suggested(CharSequence expected, CharSequence actual) {
+        if (!TextUtils.equals(expected, actual))
+            fail(format("assertEquals", expected, actual));
+    }
+
+    protected static void suggested(String message, CharSequence expected, CharSequence actual) {
+        if (!TextUtils.equals(expected, actual))
+            fail(format(message, expected, actual));
+    }
+
+    protected static void notSuggested(CharSequence expected, CharSequence actual) {
+        if (TextUtils.equals(expected, actual))
+            fail(format("assertNotEquals", expected, actual));
+    }
+
+    protected static void notSuggested(String message, CharSequence expected, CharSequence actual) {
+        if (TextUtils.equals(expected, actual))
+            fail(format(message, expected, actual));
+    }
+
+    protected static void isInSuggestions(String message, int position) {
+        assertTrue(message, position >= 0);
+    }
+
+    protected static void isNotInSuggestions(String message, int position) {
+        assertTrue(message, position < 0);
+    }
+}
diff --git a/tests/src/com/android/inputmethod/latin/UserBigramSuggestHelper.java b/tests/src/com/android/inputmethod/latin/UserBigramSuggestHelper.java
new file mode 100644
index 000000000..a6fb6e1e1
--- /dev/null
+++ b/tests/src/com/android/inputmethod/latin/UserBigramSuggestHelper.java
@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 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.keyboard.KeyboardId;
+
+import android.content.Context;
+import android.text.TextUtils;
+
+import java.io.File;
+import java.util.Locale;
+import java.util.StringTokenizer;
+
+public class UserBigramSuggestHelper extends SuggestHelper {
+    private final Context mContext;
+    private UserBigramDictionary mUserBigram;
+
+    public UserBigramSuggestHelper(Context context, File dictionaryPath, long startOffset,
+            long length, int userBigramMax, int userBigramDelete, KeyboardId keyboardId) {
+        super(context, dictionaryPath, startOffset, length, keyboardId);
+        mContext = context;
+        mUserBigram = new UserBigramDictionary(context, null, Locale.US.toString(),
+                Suggest.DIC_USER);
+        mUserBigram.setDatabaseMax(userBigramMax);
+        mUserBigram.setDatabaseDelete(userBigramDelete);
+        mSuggest.setCorrectionMode(Suggest.CORRECTION_FULL_BIGRAM);
+        mSuggest.setUserBigramDictionary(mUserBigram);
+    }
+
+    public void changeUserBigramLocale(Locale locale) {
+        if (mUserBigram != null) {
+            flushUserBigrams();
+            mUserBigram.close();
+            mUserBigram = new UserBigramDictionary(mContext, null, locale.toString(),
+                    Suggest.DIC_USER);
+            mSuggest.setUserBigramDictionary(mUserBigram);
+        }
+    }
+
+    public int searchUserBigramSuggestion(CharSequence previous, char typed,
+            CharSequence expected) {
+        if (mUserBigram == null) return -1;
+
+        flushUserBigrams();
+        if (!TextUtils.isEmpty(previous) && !TextUtils.isEmpty(Character.toString(typed))) {
+            WordComposer firstChar = createWordComposer(Character.toString(typed));
+            mSuggest.getSuggestions(null, firstChar, previous);
+            boolean reloading = mUserBigram.reloadDictionaryIfRequired();
+            if (reloading) mUserBigram.waitForDictionaryLoading();
+            mUserBigram.getBigrams(firstChar, previous, mSuggest, null);
+        }
+
+        for (int i = 0; i < mSuggest.mBigramSuggestions.size(); i++) {
+            final CharSequence word = mSuggest.mBigramSuggestions.get(i);
+            if (TextUtils.equals(word, expected))
+                return i;
+        }
+
+        return -1;
+    }
+
+    public void addToUserBigram(String sentence) {
+        StringTokenizer st = new StringTokenizer(sentence);
+        String previous = null;
+        while (st.hasMoreTokens()) {
+            String current = st.nextToken();
+            if (previous != null) {
+                addToUserBigram(new String[] {previous, current});
+            }
+            previous = current;
+        }
+    }
+
+    public void addToUserBigram(String[] pair) {
+        if (mUserBigram != null && pair.length == 2) {
+            mUserBigram.addBigrams(pair[0], pair[1]);
+        }
+    }
+
+    public void flushUserBigrams() {
+        if (mUserBigram != null) {
+            mUserBigram.flushPendingWrites();
+            mUserBigram.waitUntilUpdateDBDone();
+        }
+    }
+}
diff --git a/tests/src/com/android/inputmethod/latin/UserBigramSuggestTests.java b/tests/src/com/android/inputmethod/latin/UserBigramSuggestTests.java
new file mode 100644
index 000000000..ab5329cfd
--- /dev/null
+++ b/tests/src/com/android/inputmethod/latin/UserBigramSuggestTests.java
@@ -0,0 +1,112 @@
+/*
+ * 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 java.util.Locale;
+
+public class UserBigramSuggestTests extends SuggestTestsBase {
+    private static final int SUGGESTION_STARTS = 6;
+    private static final int MAX_DATA = 20;
+    private static final int DELETE_DATA = 10;
+
+    private UserBigramSuggestHelper mHelper;
+
+    @Override
+    protected void setUp() throws Exception {
+        super.setUp();
+        final AssetFileDescriptor dict = openTestRawResourceFd(R.raw.test);
+        mHelper = new UserBigramSuggestHelper(
+                getContext(), mTestPackageFile, dict.getStartOffset(), dict.getLength(),
+                MAX_DATA, DELETE_DATA, US_KEYBOARD_ID);
+    }
+
+    /************************** Tests ************************/
+
+    /**
+     * Test suggestion started at right time
+     */
+    public void testUserBigram() {
+        for (int i = 0; i < SUGGESTION_STARTS; i++) mHelper.addToUserBigram(pair1);
+        for (int i = 0; i < (SUGGESTION_STARTS - 1); i++) mHelper.addToUserBigram(pair2);
+
+        isInSuggestions("bigram", mHelper.searchUserBigramSuggestion("user", 'b', "bigram"));
+        isNotInSuggestions("platform",
+                mHelper.searchUserBigramSuggestion("android", 'p', "platform"));
+    }
+
+    /**
+     * Test loading correct (locale) bigrams
+     */
+    public void testOpenAndClose() {
+        for (int i = 0; i < SUGGESTION_STARTS; i++) mHelper.addToUserBigram(pair1);
+        isInSuggestions("bigram in default locale",
+                mHelper.searchUserBigramSuggestion("user", 'b', "bigram"));
+
+        // change to fr_FR
+        mHelper.changeUserBigramLocale(Locale.FRANCE);
+        for (int i = 0; i < SUGGESTION_STARTS; i++) mHelper.addToUserBigram(pair3);
+        isInSuggestions("france in fr_FR",
+                mHelper.searchUserBigramSuggestion("locale", 'f', "france"));
+        isNotInSuggestions("bigram in fr_FR",
+                mHelper.searchUserBigramSuggestion("user", 'b', "bigram"));
+
+        // change back to en_US
+        mHelper.changeUserBigramLocale(Locale.US);
+        isNotInSuggestions("france in en_US",
+                mHelper.searchUserBigramSuggestion("locale", 'f', "france"));
+        isInSuggestions("bigram in en_US",
+                mHelper.searchUserBigramSuggestion("user", 'b', "bigram"));
+    }
+
+    /**
+     * Test data gets pruned when it is over maximum
+     */
+    public void testPruningData() {
+        for (int i = 0; i < SUGGESTION_STARTS; i++) mHelper.addToUserBigram(sentence0);
+        mHelper.flushUserBigrams();
+        isInSuggestions("world after several sentence 0",
+                mHelper.searchUserBigramSuggestion("Hello", 'w', "world"));
+
+        mHelper.addToUserBigram(sentence1);
+        mHelper.addToUserBigram(sentence2);
+        isInSuggestions("world after sentence 1 and 2",
+                mHelper.searchUserBigramSuggestion("Hello", 'w', "world"));
+
+        // pruning should happen
+        mHelper.addToUserBigram(sentence3);
+        mHelper.addToUserBigram(sentence4);
+
+        // trying to reopen database to check pruning happened in database
+        mHelper.changeUserBigramLocale(Locale.US);
+        isNotInSuggestions("world after sentence 3 and 4",
+                mHelper.searchUserBigramSuggestion("Hello", 'w', "world"));
+    }
+
+    private static final String[] pair1 = {"user", "bigram"};
+    private static final String[] pair2 = {"android","platform"};
+    private static final String[] pair3 = {"locale", "france"};
+    private static final String sentence0 = "Hello world";
+    private static final String sentence1 = "This is a test for user input based bigram";
+    private static final String sentence2 = "It learns phrases that contain both dictionary and "
+        + "nondictionary words";
+    private static final String sentence3 = "This should give better suggestions than the previous "
+        + "version";
+    private static final String sentence4 = "Android stock keyboard is improving";
+}
diff --git a/tests/src/com/android/inputmethod/latin/UserBigramTests.java b/tests/src/com/android/inputmethod/latin/UserBigramTests.java
deleted file mode 100644
index af527b02d..000000000
--- a/tests/src/com/android/inputmethod/latin/UserBigramTests.java
+++ /dev/null
@@ -1,100 +0,0 @@
-/*
- * Copyright (C) 2010 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 android.test.AndroidTestCase;
-import com.android.inputmethod.latin.tests.R;
-import java.util.Locale;
-
-public class UserBigramTests extends AndroidTestCase {
-    private static final String TAG = "UserBigramTests";
-
-    private static final int SUGGESTION_STARTS = 6;
-    private static final int MAX_DATA = 20;
-    private static final int DELETE_DATA = 10;
-
-    private SuggestHelper sh;
-
-    @Override
-    protected void setUp() {
-        int resId = R.raw.test;
-        sh = new SuggestHelper(TAG, getTestContext(), resId, MAX_DATA, DELETE_DATA);
-    }
-
-    /************************** Tests ************************/
-
-    /**
-     * Test suggestion started at right time
-     */
-    public void testUserBigram() {
-        for (int i = 0; i < SUGGESTION_STARTS; i++) sh.addToUserBigram(pair1);
-        for (int i = 0; i < (SUGGESTION_STARTS - 1); i++) sh.addToUserBigram(pair2);
-
-        assertTrue(sh.isUserBigramSuggestion("user", 'b', "bigram"));
-        assertFalse(sh.isUserBigramSuggestion("android", 'p', "platform"));
-    }
-
-    /**
-     * Test loading correct (locale) bigrams
-     */
-    public void testOpenAndClose() {
-        for (int i = 0; i < SUGGESTION_STARTS; i++) sh.addToUserBigram(pair1);
-        assertTrue(sh.isUserBigramSuggestion("user", 'b', "bigram"));
-
-        // change to fr_FR
-        sh.changeUserBigramLocale(getTestContext(), Locale.FRANCE);
-        for (int i = 0; i < SUGGESTION_STARTS; i++) sh.addToUserBigram(pair3);
-        assertTrue(sh.isUserBigramSuggestion("locale", 'f', "france"));
-        assertFalse(sh.isUserBigramSuggestion("user", 'b', "bigram"));
-
-        // change back to en_US
-        sh.changeUserBigramLocale(getTestContext(), Locale.US);
-        assertFalse(sh.isUserBigramSuggestion("locale", 'f', "france"));
-        assertTrue(sh.isUserBigramSuggestion("user", 'b', "bigram"));
-    }
-
-    /**
-     * Test data gets pruned when it is over maximum
-     */
-    public void testPruningData() {
-        for (int i = 0; i < SUGGESTION_STARTS; i++) sh.addToUserBigram(sentence0);
-        sh.flushUserBigrams();
-        assertTrue(sh.isUserBigramSuggestion("Hello", 'w', "world"));
-
-        sh.addToUserBigram(sentence1);
-        sh.addToUserBigram(sentence2);
-        assertTrue(sh.isUserBigramSuggestion("Hello", 'w', "world"));
-
-        // pruning should happen
-        sh.addToUserBigram(sentence3);
-        sh.addToUserBigram(sentence4);
-
-        // trying to reopen database to check pruning happened in database
-        sh.changeUserBigramLocale(getTestContext(), Locale.US);
-        assertFalse(sh.isUserBigramSuggestion("Hello", 'w', "world"));
-    }
-
-    final String[] pair1 = new String[] {"user", "bigram"};
-    final String[] pair2 = new String[] {"android","platform"};
-    final String[] pair3 = new String[] {"locale", "france"};
-    final String sentence0 = "Hello world";
-    final String sentence1 = "This is a test for user input based bigram";
-    final String sentence2 = "It learns phrases that contain both dictionary and nondictionary "
-            + "words";
-    final String sentence3 = "This should give better suggestions than the previous version";
-    final String sentence4 = "Android stock keyboard is improving";
-}