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diff --git a/tests/src/com/android/inputmethod/latin/DistracterFilterTest.java b/tests/src/com/android/inputmethod/latin/DistracterFilterTest.java
new file mode 100644
index 000000000..186542ae5
--- /dev/null
+++ b/tests/src/com/android/inputmethod/latin/DistracterFilterTest.java
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2014 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.suitebuilder.annotation.LargeTest;
+
+import com.android.inputmethod.latin.utils.DistracterFilter;
+
+/**
+ * Unit test for DistracterFilter
+ */
+@LargeTest
+public class DistracterFilterTest extends InputTestsBase {
+    private DistracterFilter mDistracterFilter;
+
+    @Override
+    protected void setUp() throws Exception {
+        super.setUp();
+        mDistracterFilter = mLatinIME.createDistracterFilter();
+    }
+
+    public void testIsDistractorToWordsInDictionaries() {
+        final String EMPTY_PREV_WORD = null;
+        String typedWord = "alot";
+        // For this test case, we consider "alot" is a distracter to "a lot".
+        assertTrue(mDistracterFilter.isDistracterToWordsInDictionaries(EMPTY_PREV_WORD, typedWord));
+
+        typedWord = "mot";
+        // For this test case, we consider "mot" is a distracter to "not".
+        assertTrue(mDistracterFilter.isDistracterToWordsInDictionaries(EMPTY_PREV_WORD, typedWord));
+
+        typedWord = "wierd";
+        // For this test case, we consider "wierd" is a distracter to "weird".
+        assertTrue(mDistracterFilter.isDistracterToWordsInDictionaries(EMPTY_PREV_WORD, typedWord));
+
+        typedWord = "hoe";
+        // For this test case, we consider "hoe" is a distracter to "how".
+        assertTrue(mDistracterFilter.isDistracterToWordsInDictionaries(EMPTY_PREV_WORD, typedWord));
+
+        typedWord = "nit";
+        // For this test case, we consider "nit" is a distracter to "not".
+        assertTrue(mDistracterFilter.isDistracterToWordsInDictionaries(EMPTY_PREV_WORD, typedWord));
+
+        typedWord = "ill";
+        // For this test case, we consider "ill" is a distracter to "I'll".
+        assertTrue(mDistracterFilter.isDistracterToWordsInDictionaries(EMPTY_PREV_WORD, typedWord));
+
+        typedWord = "asdfd";
+        // For this test case, we consider "asdfd" is not a distracter to any word in dictionaries.
+        assertFalse(
+                mDistracterFilter.isDistracterToWordsInDictionaries(EMPTY_PREV_WORD, typedWord));
+
+        typedWord = "thank";
+        // For this test case, we consider "thank" is not a distracter to any other word
+        // in dictionaries.
+        assertFalse(
+                mDistracterFilter.isDistracterToWordsInDictionaries(EMPTY_PREV_WORD, typedWord));
+    }
+}