diff --git a/tests/src/com/android/inputmethod/latin/common/StringUtilsTests.java b/tests/src/com/android/inputmethod/latin/common/StringUtilsTests.java
index 15e310e..ec9d4be 100644
--- a/tests/src/com/android/inputmethod/latin/common/StringUtilsTests.java
+++ b/tests/src/com/android/inputmethod/latin/common/StringUtilsTests.java
@@ -19,8 +19,6 @@
 import android.test.AndroidTestCase;
 import android.test.suitebuilder.annotation.SmallTest;
 
-import com.android.inputmethod.latin.common.StringUtils;
-
 import java.util.Locale;
 
 @SmallTest
@@ -186,4 +184,294 @@
         assert_capitalizeFirstAndDowncaseRest(GREECE, "άνεση", "Άνεση");
         assert_capitalizeFirstAndDowncaseRest(GREECE, "ΆΝΕΣΗ", "Άνεση");
     }
+
+    public void testContainsInArray() {
+        assertFalse("empty array", StringUtils.containsInArray("key", new String[0]));
+        assertFalse("not in 1 element", StringUtils.containsInArray("key", new String[] {
+                "key1"
+        }));
+        assertFalse("not in 2 elements", StringUtils.containsInArray("key", new String[] {
+                "key1", "key2"
+        }));
+
+        assertTrue("in 1 element", StringUtils.containsInArray("key", new String[] {
+                "key"
+        }));
+        assertTrue("in 2 elements", StringUtils.containsInArray("key", new String[] {
+                "key1", "key"
+        }));
+    }
+
+    public void testContainsInCommaSplittableText() {
+        assertFalse("null", StringUtils.containsInCommaSplittableText("key", null));
+        assertFalse("empty", StringUtils.containsInCommaSplittableText("key", ""));
+        assertFalse("not in 1 element",
+                StringUtils.containsInCommaSplittableText("key", "key1"));
+        assertFalse("not in 2 elements",
+                StringUtils.containsInCommaSplittableText("key", "key1,key2"));
+
+        assertTrue("in 1 element", StringUtils.containsInCommaSplittableText("key", "key"));
+        assertTrue("in 2 elements", StringUtils.containsInCommaSplittableText("key", "key1,key"));
+    }
+
+    public void testRemoveFromCommaSplittableTextIfExists() {
+        assertEquals("null", "", StringUtils.removeFromCommaSplittableTextIfExists("key", null));
+        assertEquals("empty", "", StringUtils.removeFromCommaSplittableTextIfExists("key", ""));
+
+        assertEquals("not in 1 element", "key1",
+                StringUtils.removeFromCommaSplittableTextIfExists("key", "key1"));
+        assertEquals("not in 2 elements", "key1,key2",
+                StringUtils.removeFromCommaSplittableTextIfExists("key", "key1,key2"));
+
+        assertEquals("in 1 element", "",
+                StringUtils.removeFromCommaSplittableTextIfExists("key", "key"));
+        assertEquals("in 2 elements at position 1", "key2",
+                StringUtils.removeFromCommaSplittableTextIfExists("key", "key,key2"));
+        assertEquals("in 2 elements at position 2", "key1",
+                StringUtils.removeFromCommaSplittableTextIfExists("key", "key1,key"));
+        assertEquals("in 3 elements at position 2", "key1,key3",
+                StringUtils.removeFromCommaSplittableTextIfExists("key", "key1,key,key3"));
+
+        assertEquals("in 3 elements at position 1,2,3", "",
+                StringUtils.removeFromCommaSplittableTextIfExists("key", "key,key,key"));
+        assertEquals("in 5 elements at position 2,4", "key1,key3,key5",
+                StringUtils.removeFromCommaSplittableTextIfExists(
+                        "key", "key1,key,key3,key,key5"));
+    }
+
+
+    public void testCapitalizeFirstCodePoint() {
+        assertEquals("SSaa",
+                StringUtils.capitalizeFirstCodePoint("ßaa", Locale.GERMAN));
+        assertEquals("Aßa",
+                StringUtils.capitalizeFirstCodePoint("aßa", Locale.GERMAN));
+        assertEquals("Iab",
+                StringUtils.capitalizeFirstCodePoint("iab", Locale.ENGLISH));
+        assertEquals("CAmElCaSe",
+                StringUtils.capitalizeFirstCodePoint("cAmElCaSe", Locale.ENGLISH));
+        assertEquals("İab",
+                StringUtils.capitalizeFirstCodePoint("iab", new Locale("tr")));
+        assertEquals("AİB",
+                StringUtils.capitalizeFirstCodePoint("AİB", new Locale("tr")));
+        assertEquals("A",
+                StringUtils.capitalizeFirstCodePoint("a", Locale.ENGLISH));
+        assertEquals("A",
+                StringUtils.capitalizeFirstCodePoint("A", Locale.ENGLISH));
+    }
+
+    public void testCapitalizeFirstAndDowncaseRest() {
+        assertEquals("SSaa",
+                StringUtils.capitalizeFirstAndDowncaseRest("ßaa", Locale.GERMAN));
+        assertEquals("Aßa",
+                StringUtils.capitalizeFirstAndDowncaseRest("aßa", Locale.GERMAN));
+        assertEquals("Iab",
+                StringUtils.capitalizeFirstAndDowncaseRest("iab", Locale.ENGLISH));
+        assertEquals("Camelcase",
+                StringUtils.capitalizeFirstAndDowncaseRest("cAmElCaSe", Locale.ENGLISH));
+        assertEquals("İab",
+                StringUtils.capitalizeFirstAndDowncaseRest("iab", new Locale("tr")));
+        assertEquals("Aib",
+                StringUtils.capitalizeFirstAndDowncaseRest("AİB", new Locale("tr")));
+        assertEquals("A",
+                StringUtils.capitalizeFirstAndDowncaseRest("a", Locale.ENGLISH));
+        assertEquals("A",
+                StringUtils.capitalizeFirstAndDowncaseRest("A", Locale.ENGLISH));
+    }
+
+    public void testGetCapitalizationType() {
+        assertEquals(StringUtils.CAPITALIZE_NONE,
+                StringUtils.getCapitalizationType("capitalize"));
+        assertEquals(StringUtils.CAPITALIZE_NONE,
+                StringUtils.getCapitalizationType("cApITalize"));
+        assertEquals(StringUtils.CAPITALIZE_NONE,
+                StringUtils.getCapitalizationType("capitalizE"));
+        assertEquals(StringUtils.CAPITALIZE_NONE,
+                StringUtils.getCapitalizationType("__c a piu$@tali56ze"));
+        assertEquals(StringUtils.CAPITALIZE_FIRST,
+                StringUtils.getCapitalizationType("A__c a piu$@tali56ze"));
+        assertEquals(StringUtils.CAPITALIZE_FIRST,
+                StringUtils.getCapitalizationType("Capitalize"));
+        assertEquals(StringUtils.CAPITALIZE_FIRST,
+                StringUtils.getCapitalizationType("     Capitalize"));
+        assertEquals(StringUtils.CAPITALIZE_ALL,
+                StringUtils.getCapitalizationType("CAPITALIZE"));
+        assertEquals(StringUtils.CAPITALIZE_ALL,
+                StringUtils.getCapitalizationType("  PI26LIE"));
+        assertEquals(StringUtils.CAPITALIZE_NONE,
+                StringUtils.getCapitalizationType(""));
+    }
+
+    public void testIsIdenticalAfterUpcaseIsIdenticalAfterDowncase() {
+        assertFalse(StringUtils.isIdenticalAfterUpcase("capitalize"));
+        assertTrue(StringUtils.isIdenticalAfterDowncase("capitalize"));
+        assertFalse(StringUtils.isIdenticalAfterUpcase("cApITalize"));
+        assertFalse(StringUtils.isIdenticalAfterDowncase("cApITalize"));
+        assertFalse(StringUtils.isIdenticalAfterUpcase("capitalizE"));
+        assertFalse(StringUtils.isIdenticalAfterDowncase("capitalizE"));
+        assertFalse(StringUtils.isIdenticalAfterUpcase("__c a piu$@tali56ze"));
+        assertTrue(StringUtils.isIdenticalAfterDowncase("__c a piu$@tali56ze"));
+        assertFalse(StringUtils.isIdenticalAfterUpcase("A__c a piu$@tali56ze"));
+        assertFalse(StringUtils.isIdenticalAfterDowncase("A__c a piu$@tali56ze"));
+        assertFalse(StringUtils.isIdenticalAfterUpcase("Capitalize"));
+        assertFalse(StringUtils.isIdenticalAfterDowncase("Capitalize"));
+        assertFalse(StringUtils.isIdenticalAfterUpcase("     Capitalize"));
+        assertFalse(StringUtils.isIdenticalAfterDowncase("     Capitalize"));
+        assertTrue(StringUtils.isIdenticalAfterUpcase("CAPITALIZE"));
+        assertFalse(StringUtils.isIdenticalAfterDowncase("CAPITALIZE"));
+        assertTrue(StringUtils.isIdenticalAfterUpcase("  PI26LIE"));
+        assertFalse(StringUtils.isIdenticalAfterDowncase("  PI26LIE"));
+        assertTrue(StringUtils.isIdenticalAfterUpcase(""));
+        assertTrue(StringUtils.isIdenticalAfterDowncase(""));
+    }
+
+    private static void checkCapitalize(final String src, final String dst,
+            final int[] sortedSeparators, final Locale locale) {
+        assertEquals(dst, StringUtils.capitalizeEachWord(src, sortedSeparators, locale));
+        assert(src.equals(dst)
+                == StringUtils.isIdenticalAfterCapitalizeEachWord(src, sortedSeparators));
+    }
+
+    private static final int[] SPACE = { Constants.CODE_SPACE };
+    private static final int[] SPACE_PERIOD = StringUtils.toSortedCodePointArray(" .");
+    private static final int[] SENTENCE_SEPARATORS =
+            StringUtils.toSortedCodePointArray(" \n.!?*()&");
+    private static final int[] WORD_SEPARATORS = StringUtils.toSortedCodePointArray(" \n.!?*,();&");
+
+    public void testCapitalizeEachWord() {
+        checkCapitalize("", "", SPACE, Locale.ENGLISH);
+        checkCapitalize("test", "Test", SPACE, Locale.ENGLISH);
+        checkCapitalize("    test", "    Test", SPACE, Locale.ENGLISH);
+        checkCapitalize("Test", "Test", SPACE, Locale.ENGLISH);
+        checkCapitalize("    Test", "    Test", SPACE, Locale.ENGLISH);
+        checkCapitalize(".Test", ".test", SPACE, Locale.ENGLISH);
+        checkCapitalize(".Test", ".Test", SPACE_PERIOD, Locale.ENGLISH);
+        checkCapitalize("test and retest", "Test And Retest", SPACE_PERIOD, Locale.ENGLISH);
+        checkCapitalize("Test and retest", "Test And Retest", SPACE_PERIOD, Locale.ENGLISH);
+        checkCapitalize("Test And Retest", "Test And Retest", SPACE_PERIOD, Locale.ENGLISH);
+        checkCapitalize("Test And.Retest  ", "Test And.Retest  ", SPACE_PERIOD, Locale.ENGLISH);
+        checkCapitalize("Test And.retest  ", "Test And.Retest  ", SPACE_PERIOD, Locale.ENGLISH);
+        checkCapitalize("Test And.retest  ", "Test And.retest  ", SPACE, Locale.ENGLISH);
+        checkCapitalize("Test And.Retest  ", "Test And.retest  ", SPACE, Locale.ENGLISH);
+        checkCapitalize("test and ietest", "Test And İetest", SPACE_PERIOD, new Locale("tr"));
+        checkCapitalize("test and ietest", "Test And Ietest", SPACE_PERIOD, Locale.ENGLISH);
+        checkCapitalize("Test&Retest", "Test&Retest", SENTENCE_SEPARATORS, Locale.ENGLISH);
+        checkCapitalize("Test&retest", "Test&Retest", SENTENCE_SEPARATORS, Locale.ENGLISH);
+        checkCapitalize("test&Retest", "Test&Retest", SENTENCE_SEPARATORS, Locale.ENGLISH);
+        checkCapitalize("rest\nrecreation! And in the end...",
+                "Rest\nRecreation! And In The End...", WORD_SEPARATORS, Locale.ENGLISH);
+        checkCapitalize("lorem ipsum dolor sit amet", "Lorem Ipsum Dolor Sit Amet",
+                WORD_SEPARATORS, Locale.ENGLISH);
+        checkCapitalize("Lorem!Ipsum (Dolor) Sit * Amet", "Lorem!Ipsum (Dolor) Sit * Amet",
+                WORD_SEPARATORS, Locale.ENGLISH);
+        checkCapitalize("Lorem!Ipsum (dolor) Sit * Amet", "Lorem!Ipsum (Dolor) Sit * Amet",
+                WORD_SEPARATORS, Locale.ENGLISH);
+    }
+
+    public void testLooksLikeURL() {
+        assertTrue(StringUtils.lastPartLooksLikeURL("http://www.google."));
+        assertFalse(StringUtils.lastPartLooksLikeURL("word wo"));
+        assertTrue(StringUtils.lastPartLooksLikeURL("/etc/foo"));
+        assertFalse(StringUtils.lastPartLooksLikeURL("left/right"));
+        assertTrue(StringUtils.lastPartLooksLikeURL("www.goo"));
+        assertTrue(StringUtils.lastPartLooksLikeURL("www."));
+        assertFalse(StringUtils.lastPartLooksLikeURL("U.S.A"));
+        assertFalse(StringUtils.lastPartLooksLikeURL("U.S.A."));
+        assertTrue(StringUtils.lastPartLooksLikeURL("rtsp://foo."));
+        assertTrue(StringUtils.lastPartLooksLikeURL("://"));
+        assertFalse(StringUtils.lastPartLooksLikeURL("abc/"));
+        assertTrue(StringUtils.lastPartLooksLikeURL("abc.def/ghi"));
+        assertFalse(StringUtils.lastPartLooksLikeURL("abc.def"));
+        // TODO: ideally this would not look like a URL, but to keep down the complexity of the
+        // code for now True is acceptable.
+        assertTrue(StringUtils.lastPartLooksLikeURL("abc./def"));
+        // TODO: ideally this would not look like a URL, but to keep down the complexity of the
+        // code for now True is acceptable.
+        assertTrue(StringUtils.lastPartLooksLikeURL(".abc/def"));
+    }
+
+    public void testHexStringUtils() {
+        final byte[] bytes = new byte[] { (byte)0x01, (byte)0x11, (byte)0x22, (byte)0x33,
+                (byte)0x55, (byte)0x88, (byte)0xEE };
+        final String bytesStr = StringUtils.byteArrayToHexString(bytes);
+        final byte[] bytes2 = StringUtils.hexStringToByteArray(bytesStr);
+        for (int i = 0; i < bytes.length; ++i) {
+            assertTrue(bytes[i] == bytes2[i]);
+        }
+        final String bytesStr2 = StringUtils.byteArrayToHexString(bytes2);
+        assertTrue(bytesStr.equals(bytesStr2));
+    }
+
+    public void testToCodePointArray() {
+        final String STR_WITH_SUPPLEMENTARY_CHAR = "abcde\uD861\uDED7fgh\u0000\u2002\u2003\u3000xx";
+        final int[] EXPECTED_RESULT = new int[] { 'a', 'b', 'c', 'd', 'e', 0x286D7, 'f', 'g', 'h',
+                0, 0x2002, 0x2003, 0x3000, 'x', 'x'};
+        final int[] codePointArray = StringUtils.toCodePointArray(STR_WITH_SUPPLEMENTARY_CHAR, 0,
+                STR_WITH_SUPPLEMENTARY_CHAR.length());
+        assertEquals("toCodePointArray, size matches", codePointArray.length,
+                EXPECTED_RESULT.length);
+        for (int i = 0; i < EXPECTED_RESULT.length; ++i) {
+            assertEquals("toCodePointArray position " + i, codePointArray[i], EXPECTED_RESULT[i]);
+        }
+    }
+
+    public void testCopyCodePointsAndReturnCodePointCount() {
+        final String STR_WITH_SUPPLEMENTARY_CHAR = "AbcDE\uD861\uDED7fGh\u0000\u2002\u3000あx";
+        final int[] EXPECTED_RESULT = new int[] { 'A', 'b', 'c', 'D', 'E', 0x286D7,
+                'f', 'G', 'h', 0, 0x2002, 0x3000, 'あ', 'x'};
+        final int[] EXPECTED_RESULT_DOWNCASE = new int[] { 'a', 'b', 'c', 'd', 'e', 0x286D7,
+                'f', 'g', 'h', 0, 0x2002, 0x3000, 'あ', 'x'};
+
+        int[] codePointArray = new int[50];
+        int codePointCount = StringUtils.copyCodePointsAndReturnCodePointCount(codePointArray,
+                STR_WITH_SUPPLEMENTARY_CHAR, 0,
+                STR_WITH_SUPPLEMENTARY_CHAR.length(), false /* downCase */);
+        assertEquals("copyCodePointsAndReturnCodePointCount, size matches", codePointCount,
+                EXPECTED_RESULT.length);
+        for (int i = 0; i < codePointCount; ++i) {
+            assertEquals("copyCodePointsAndReturnCodePointCount position " + i, codePointArray[i],
+                    EXPECTED_RESULT[i]);
+        }
+
+        codePointCount = StringUtils.copyCodePointsAndReturnCodePointCount(codePointArray,
+                STR_WITH_SUPPLEMENTARY_CHAR, 0,
+                STR_WITH_SUPPLEMENTARY_CHAR.length(), true /* downCase */);
+        assertEquals("copyCodePointsAndReturnCodePointCount downcase, size matches", codePointCount,
+                EXPECTED_RESULT_DOWNCASE.length);
+        for (int i = 0; i < codePointCount; ++i) {
+            assertEquals("copyCodePointsAndReturnCodePointCount position " + i, codePointArray[i],
+                    EXPECTED_RESULT_DOWNCASE[i]);
+        }
+
+        final int JAVA_CHAR_COUNT = 8;
+        final int CODEPOINT_COUNT = 7;
+        codePointCount = StringUtils.copyCodePointsAndReturnCodePointCount(codePointArray,
+                STR_WITH_SUPPLEMENTARY_CHAR, 0, JAVA_CHAR_COUNT, false /* downCase */);
+        assertEquals("copyCodePointsAndReturnCodePointCount, size matches", codePointCount,
+                CODEPOINT_COUNT);
+        for (int i = 0; i < codePointCount; ++i) {
+            assertEquals("copyCodePointsAndReturnCodePointCount position " + i, codePointArray[i],
+                    EXPECTED_RESULT[i]);
+        }
+
+        boolean exceptionHappened = false;
+        codePointArray = new int[5];
+        try {
+            codePointCount = StringUtils.copyCodePointsAndReturnCodePointCount(codePointArray,
+                    STR_WITH_SUPPLEMENTARY_CHAR, 0, JAVA_CHAR_COUNT, false /* downCase */);
+        } catch (ArrayIndexOutOfBoundsException e) {
+            exceptionHappened = true;
+        }
+        assertTrue("copyCodePointsAndReturnCodePointCount throws when array is too small",
+                exceptionHappened);
+    }
+
+    public void testGetTrailingSingleQuotesCount() {
+        assertEquals(0, StringUtils.getTrailingSingleQuotesCount(""));
+        assertEquals(1, StringUtils.getTrailingSingleQuotesCount("'"));
+        assertEquals(5, StringUtils.getTrailingSingleQuotesCount("'''''"));
+        assertEquals(0, StringUtils.getTrailingSingleQuotesCount("a"));
+        assertEquals(0, StringUtils.getTrailingSingleQuotesCount("'this"));
+        assertEquals(1, StringUtils.getTrailingSingleQuotesCount("'word'"));
+        assertEquals(0, StringUtils.getTrailingSingleQuotesCount("I'm"));
+    }
 }
diff --git a/tests/src/com/android/inputmethod/latin/utils/JsonUtilsTests.java b/tests/src/com/android/inputmethod/latin/utils/JsonUtilsTests.java
new file mode 100644
index 0000000..1941120
--- /dev/null
+++ b/tests/src/com/android/inputmethod/latin/utils/JsonUtilsTests.java
@@ -0,0 +1,36 @@
+/*
+ * 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.utils;
+
+import android.test.AndroidTestCase;
+import android.test.suitebuilder.annotation.SmallTest;
+
+import java.util.Arrays;
+import java.util.List;
+
+@SmallTest
+public class JsonUtilsTests extends AndroidTestCase {
+    public void testJsonUtils() {
+        final Object[] objs = new Object[] { 1, "aaa", "bbb", 3 };
+        final List<Object> objArray = Arrays.asList(objs);
+        final String str = JsonUtils.listToJsonStr(objArray);
+        final List<Object> newObjArray = JsonUtils.jsonStrToList(str);
+        for (int i = 0; i < objs.length; ++i) {
+            assertEquals(objs[i], newObjArray.get(i));
+        }
+    }
+}
diff --git a/tests/src/com/android/inputmethod/latin/utils/SpannableStringUtilsTests.java b/tests/src/com/android/inputmethod/latin/utils/SpannableStringUtilsTests.java
index 11d10aa..665d81c 100644
--- a/tests/src/com/android/inputmethod/latin/utils/SpannableStringUtilsTests.java
+++ b/tests/src/com/android/inputmethod/latin/utils/SpannableStringUtilsTests.java
@@ -20,8 +20,10 @@
 import android.test.suitebuilder.annotation.SmallTest;
 import android.text.style.SuggestionSpan;
 import android.text.style.URLSpan;
+import android.text.SpannableString;
 import android.text.SpannableStringBuilder;
 import android.text.Spanned;
+import android.text.SpannedString;
 
 @SmallTest
 public class SpannableStringUtilsTests extends AndroidTestCase {
@@ -54,4 +56,171 @@
             assertTrue("Should be a SuggestionSpan", spans[i] instanceof SuggestionSpan);
         }
     }
+
+    private static void assertSpanCount(final int expectedCount, final CharSequence cs) {
+        final int actualCount;
+        if (cs instanceof Spanned) {
+            final Spanned spanned = (Spanned) cs;
+            actualCount = spanned.getSpans(0, spanned.length(), Object.class).length;
+        } else {
+            actualCount = 0;
+        }
+        assertEquals(expectedCount, actualCount);
+    }
+
+    private static void assertSpan(final CharSequence cs, final Object expectedSpan,
+            final int expectedStart, final int expectedEnd, final int expectedFlags) {
+        assertTrue(cs instanceof Spanned);
+        final Spanned spanned = (Spanned) cs;
+        final Object[] actualSpans = spanned.getSpans(0, spanned.length(), Object.class);
+        for (Object actualSpan : actualSpans) {
+            if (actualSpan == expectedSpan) {
+                final int actualStart = spanned.getSpanStart(actualSpan);
+                final int actualEnd = spanned.getSpanEnd(actualSpan);
+                final int actualFlags = spanned.getSpanFlags(actualSpan);
+                assertEquals(expectedStart, actualStart);
+                assertEquals(expectedEnd, actualEnd);
+                assertEquals(expectedFlags, actualFlags);
+                return;
+            }
+        }
+        assertTrue(false);
+    }
+
+    public void testSplitCharSequenceWithSpan() {
+        // text:  " a bcd efg hij  "
+        // span1:  ^^^^^^^
+        // span2:  ^^^^^
+        // span3:              ^
+        final SpannableString spannableString = new SpannableString(" a bcd efg hij  ");
+        final Object span1 = new Object();
+        final Object span2 = new Object();
+        final Object span3 = new Object();
+        final int SPAN1_FLAGS = Spanned.SPAN_EXCLUSIVE_EXCLUSIVE;
+        final int SPAN2_FLAGS = Spanned.SPAN_EXCLUSIVE_INCLUSIVE;
+        final int SPAN3_FLAGS = Spanned.SPAN_INCLUSIVE_INCLUSIVE;
+        spannableString.setSpan(span1, 0, 7, SPAN1_FLAGS);
+        spannableString.setSpan(span2, 0, 5, SPAN2_FLAGS);
+        spannableString.setSpan(span3, 12, 13, SPAN3_FLAGS);
+        final CharSequence[] charSequencesFromSpanned = SpannableStringUtils.split(
+                spannableString, " ", true /* preserveTrailingEmptySegmengs */);
+        final CharSequence[] charSequencesFromString = SpannableStringUtils.split(
+                spannableString.toString(), " ", true /* preserveTrailingEmptySegmengs */);
+
+
+        assertEquals(7, charSequencesFromString.length);
+        assertEquals(7, charSequencesFromSpanned.length);
+
+        // text:  ""
+        // span1: ^
+        // span2: ^
+        // span3:
+        assertEquals("", charSequencesFromString[0].toString());
+        assertSpanCount(0, charSequencesFromString[0]);
+        assertEquals("", charSequencesFromSpanned[0].toString());
+        assertSpanCount(2, charSequencesFromSpanned[0]);
+        assertSpan(charSequencesFromSpanned[0], span1, 0, 0, SPAN1_FLAGS);
+        assertSpan(charSequencesFromSpanned[0], span2, 0, 0, SPAN2_FLAGS);
+
+        // text:  "a"
+        // span1:  ^
+        // span2:  ^
+        // span3:
+        assertEquals("a", charSequencesFromString[1].toString());
+        assertSpanCount(0, charSequencesFromString[1]);
+        assertEquals("a", charSequencesFromSpanned[1].toString());
+        assertSpanCount(2, charSequencesFromSpanned[1]);
+        assertSpan(charSequencesFromSpanned[1], span1, 0, 1, SPAN1_FLAGS);
+        assertSpan(charSequencesFromSpanned[1], span2, 0, 1, SPAN2_FLAGS);
+
+        // text:  "bcd"
+        // span1:  ^^^
+        // span2:  ^^
+        // span3:
+        assertEquals("bcd", charSequencesFromString[2].toString());
+        assertSpanCount(0, charSequencesFromString[2]);
+        assertEquals("bcd", charSequencesFromSpanned[2].toString());
+        assertSpanCount(2, charSequencesFromSpanned[2]);
+        assertSpan(charSequencesFromSpanned[2], span1, 0, 3, SPAN1_FLAGS);
+        assertSpan(charSequencesFromSpanned[2], span2, 0, 2, SPAN2_FLAGS);
+
+        // text:  "efg"
+        // span1:
+        // span2:
+        // span3:
+        assertEquals("efg", charSequencesFromString[3].toString());
+        assertSpanCount(0, charSequencesFromString[3]);
+        assertEquals("efg", charSequencesFromSpanned[3].toString());
+        assertSpanCount(0, charSequencesFromSpanned[3]);
+
+        // text:  "hij"
+        // span1:
+        // span2:
+        // span3:   ^
+        assertEquals("hij", charSequencesFromString[4].toString());
+        assertSpanCount(0, charSequencesFromString[4]);
+        assertEquals("hij", charSequencesFromSpanned[4].toString());
+        assertSpanCount(1, charSequencesFromSpanned[4]);
+        assertSpan(charSequencesFromSpanned[4], span3, 1, 2, SPAN3_FLAGS);
+
+        // text:  ""
+        // span1:
+        // span2:
+        // span3:
+        assertEquals("", charSequencesFromString[5].toString());
+        assertSpanCount(0, charSequencesFromString[5]);
+        assertEquals("", charSequencesFromSpanned[5].toString());
+        assertSpanCount(0, charSequencesFromSpanned[5]);
+
+        // text:  ""
+        // span1:
+        // span2:
+        // span3:
+        assertEquals("", charSequencesFromString[6].toString());
+        assertSpanCount(0, charSequencesFromString[6]);
+        assertEquals("", charSequencesFromSpanned[6].toString());
+        assertSpanCount(0, charSequencesFromSpanned[6]);
+    }
+
+    public void testSplitCharSequencePreserveTrailingEmptySegmengs() {
+        assertEquals(1, SpannableStringUtils.split("", " ",
+                false /* preserveTrailingEmptySegmengs */).length);
+        assertEquals(1, SpannableStringUtils.split(new SpannedString(""), " ",
+                false /* preserveTrailingEmptySegmengs */).length);
+
+        assertEquals(1, SpannableStringUtils.split("", " ",
+                true /* preserveTrailingEmptySegmengs */).length);
+        assertEquals(1, SpannableStringUtils.split(new SpannedString(""), " ",
+                true /* preserveTrailingEmptySegmengs */).length);
+
+        assertEquals(0, SpannableStringUtils.split(" ", " ",
+                false /* preserveTrailingEmptySegmengs */).length);
+        assertEquals(0, SpannableStringUtils.split(new SpannedString(" "), " ",
+                false /* preserveTrailingEmptySegmengs */).length);
+
+        assertEquals(2, SpannableStringUtils.split(" ", " ",
+                true /* preserveTrailingEmptySegmengs */).length);
+        assertEquals(2, SpannableStringUtils.split(new SpannedString(" "), " ",
+                true /* preserveTrailingEmptySegmengs */).length);
+
+        assertEquals(3, SpannableStringUtils.split("a b c  ", " ",
+                false /* preserveTrailingEmptySegmengs */).length);
+        assertEquals(3, SpannableStringUtils.split(new SpannedString("a b c  "), " ",
+                false /* preserveTrailingEmptySegmengs */).length);
+
+        assertEquals(5, SpannableStringUtils.split("a b c  ", " ",
+                true /* preserveTrailingEmptySegmengs */).length);
+        assertEquals(5, SpannableStringUtils.split(new SpannedString("a b c  "), " ",
+                true /* preserveTrailingEmptySegmengs */).length);
+
+        assertEquals(6, SpannableStringUtils.split("a     b ", " ",
+                false /* preserveTrailingEmptySegmengs */).length);
+        assertEquals(6, SpannableStringUtils.split(new SpannedString("a     b "), " ",
+                false /* preserveTrailingEmptySegmengs */).length);
+
+        assertEquals(7, SpannableStringUtils.split("a     b ", " ",
+                true /* preserveTrailingEmptySegmengs */).length);
+        assertEquals(7, SpannableStringUtils.split(new SpannedString("a     b "), " ",
+                true /* preserveTrailingEmptySegmengs */).length);
+    }
 }
diff --git a/tests/src/com/android/inputmethod/latin/utils/StringAndJsonUtilsTests.java b/tests/src/com/android/inputmethod/latin/utils/StringAndJsonUtilsTests.java
deleted file mode 100644
index 0389fef..0000000
--- a/tests/src/com/android/inputmethod/latin/utils/StringAndJsonUtilsTests.java
+++ /dev/null
@@ -1,501 +0,0 @@
-/*
- * 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.utils;
-
-import android.test.AndroidTestCase;
-import android.test.suitebuilder.annotation.SmallTest;
-import android.text.SpannableString;
-import android.text.Spanned;
-import android.text.SpannedString;
-
-import com.android.inputmethod.latin.common.Constants;
-import com.android.inputmethod.latin.common.StringUtils;
-import com.android.inputmethod.latin.utils.SpannableStringUtils;
-
-import java.util.Arrays;
-import java.util.List;
-import java.util.Locale;
-
-@SmallTest
-public class StringAndJsonUtilsTests extends AndroidTestCase {
-    public void testContainsInArray() {
-        assertFalse("empty array", StringUtils.containsInArray("key", new String[0]));
-        assertFalse("not in 1 element", StringUtils.containsInArray("key", new String[] {
-                "key1"
-        }));
-        assertFalse("not in 2 elements", StringUtils.containsInArray("key", new String[] {
-                "key1", "key2"
-        }));
-
-        assertTrue("in 1 element", StringUtils.containsInArray("key", new String[] {
-                "key"
-        }));
-        assertTrue("in 2 elements", StringUtils.containsInArray("key", new String[] {
-                "key1", "key"
-        }));
-    }
-
-    public void testContainsInCommaSplittableText() {
-        assertFalse("null", StringUtils.containsInCommaSplittableText("key", null));
-        assertFalse("empty", StringUtils.containsInCommaSplittableText("key", ""));
-        assertFalse("not in 1 element",
-                StringUtils.containsInCommaSplittableText("key", "key1"));
-        assertFalse("not in 2 elements",
-                StringUtils.containsInCommaSplittableText("key", "key1,key2"));
-
-        assertTrue("in 1 element", StringUtils.containsInCommaSplittableText("key", "key"));
-        assertTrue("in 2 elements", StringUtils.containsInCommaSplittableText("key", "key1,key"));
-    }
-
-    public void testRemoveFromCommaSplittableTextIfExists() {
-        assertEquals("null", "", StringUtils.removeFromCommaSplittableTextIfExists("key", null));
-        assertEquals("empty", "", StringUtils.removeFromCommaSplittableTextIfExists("key", ""));
-
-        assertEquals("not in 1 element", "key1",
-                StringUtils.removeFromCommaSplittableTextIfExists("key", "key1"));
-        assertEquals("not in 2 elements", "key1,key2",
-                StringUtils.removeFromCommaSplittableTextIfExists("key", "key1,key2"));
-
-        assertEquals("in 1 element", "",
-                StringUtils.removeFromCommaSplittableTextIfExists("key", "key"));
-        assertEquals("in 2 elements at position 1", "key2",
-                StringUtils.removeFromCommaSplittableTextIfExists("key", "key,key2"));
-        assertEquals("in 2 elements at position 2", "key1",
-                StringUtils.removeFromCommaSplittableTextIfExists("key", "key1,key"));
-        assertEquals("in 3 elements at position 2", "key1,key3",
-                StringUtils.removeFromCommaSplittableTextIfExists("key", "key1,key,key3"));
-
-        assertEquals("in 3 elements at position 1,2,3", "",
-                StringUtils.removeFromCommaSplittableTextIfExists("key", "key,key,key"));
-        assertEquals("in 5 elements at position 2,4", "key1,key3,key5",
-                StringUtils.removeFromCommaSplittableTextIfExists(
-                        "key", "key1,key,key3,key,key5"));
-    }
-
-
-    public void testCapitalizeFirstCodePoint() {
-        assertEquals("SSaa",
-                StringUtils.capitalizeFirstCodePoint("ßaa", Locale.GERMAN));
-        assertEquals("Aßa",
-                StringUtils.capitalizeFirstCodePoint("aßa", Locale.GERMAN));
-        assertEquals("Iab",
-                StringUtils.capitalizeFirstCodePoint("iab", Locale.ENGLISH));
-        assertEquals("CAmElCaSe",
-                StringUtils.capitalizeFirstCodePoint("cAmElCaSe", Locale.ENGLISH));
-        assertEquals("İab",
-                StringUtils.capitalizeFirstCodePoint("iab", new Locale("tr")));
-        assertEquals("AİB",
-                StringUtils.capitalizeFirstCodePoint("AİB", new Locale("tr")));
-        assertEquals("A",
-                StringUtils.capitalizeFirstCodePoint("a", Locale.ENGLISH));
-        assertEquals("A",
-                StringUtils.capitalizeFirstCodePoint("A", Locale.ENGLISH));
-    }
-
-    public void testCapitalizeFirstAndDowncaseRest() {
-        assertEquals("SSaa",
-                StringUtils.capitalizeFirstAndDowncaseRest("ßaa", Locale.GERMAN));
-        assertEquals("Aßa",
-                StringUtils.capitalizeFirstAndDowncaseRest("aßa", Locale.GERMAN));
-        assertEquals("Iab",
-                StringUtils.capitalizeFirstAndDowncaseRest("iab", Locale.ENGLISH));
-        assertEquals("Camelcase",
-                StringUtils.capitalizeFirstAndDowncaseRest("cAmElCaSe", Locale.ENGLISH));
-        assertEquals("İab",
-                StringUtils.capitalizeFirstAndDowncaseRest("iab", new Locale("tr")));
-        assertEquals("Aib",
-                StringUtils.capitalizeFirstAndDowncaseRest("AİB", new Locale("tr")));
-        assertEquals("A",
-                StringUtils.capitalizeFirstAndDowncaseRest("a", Locale.ENGLISH));
-        assertEquals("A",
-                StringUtils.capitalizeFirstAndDowncaseRest("A", Locale.ENGLISH));
-    }
-
-    public void testGetCapitalizationType() {
-        assertEquals(StringUtils.CAPITALIZE_NONE,
-                StringUtils.getCapitalizationType("capitalize"));
-        assertEquals(StringUtils.CAPITALIZE_NONE,
-                StringUtils.getCapitalizationType("cApITalize"));
-        assertEquals(StringUtils.CAPITALIZE_NONE,
-                StringUtils.getCapitalizationType("capitalizE"));
-        assertEquals(StringUtils.CAPITALIZE_NONE,
-                StringUtils.getCapitalizationType("__c a piu$@tali56ze"));
-        assertEquals(StringUtils.CAPITALIZE_FIRST,
-                StringUtils.getCapitalizationType("A__c a piu$@tali56ze"));
-        assertEquals(StringUtils.CAPITALIZE_FIRST,
-                StringUtils.getCapitalizationType("Capitalize"));
-        assertEquals(StringUtils.CAPITALIZE_FIRST,
-                StringUtils.getCapitalizationType("     Capitalize"));
-        assertEquals(StringUtils.CAPITALIZE_ALL,
-                StringUtils.getCapitalizationType("CAPITALIZE"));
-        assertEquals(StringUtils.CAPITALIZE_ALL,
-                StringUtils.getCapitalizationType("  PI26LIE"));
-        assertEquals(StringUtils.CAPITALIZE_NONE,
-                StringUtils.getCapitalizationType(""));
-    }
-
-    public void testIsIdenticalAfterUpcaseIsIdenticalAfterDowncase() {
-        assertFalse(StringUtils.isIdenticalAfterUpcase("capitalize"));
-        assertTrue(StringUtils.isIdenticalAfterDowncase("capitalize"));
-        assertFalse(StringUtils.isIdenticalAfterUpcase("cApITalize"));
-        assertFalse(StringUtils.isIdenticalAfterDowncase("cApITalize"));
-        assertFalse(StringUtils.isIdenticalAfterUpcase("capitalizE"));
-        assertFalse(StringUtils.isIdenticalAfterDowncase("capitalizE"));
-        assertFalse(StringUtils.isIdenticalAfterUpcase("__c a piu$@tali56ze"));
-        assertTrue(StringUtils.isIdenticalAfterDowncase("__c a piu$@tali56ze"));
-        assertFalse(StringUtils.isIdenticalAfterUpcase("A__c a piu$@tali56ze"));
-        assertFalse(StringUtils.isIdenticalAfterDowncase("A__c a piu$@tali56ze"));
-        assertFalse(StringUtils.isIdenticalAfterUpcase("Capitalize"));
-        assertFalse(StringUtils.isIdenticalAfterDowncase("Capitalize"));
-        assertFalse(StringUtils.isIdenticalAfterUpcase("     Capitalize"));
-        assertFalse(StringUtils.isIdenticalAfterDowncase("     Capitalize"));
-        assertTrue(StringUtils.isIdenticalAfterUpcase("CAPITALIZE"));
-        assertFalse(StringUtils.isIdenticalAfterDowncase("CAPITALIZE"));
-        assertTrue(StringUtils.isIdenticalAfterUpcase("  PI26LIE"));
-        assertFalse(StringUtils.isIdenticalAfterDowncase("  PI26LIE"));
-        assertTrue(StringUtils.isIdenticalAfterUpcase(""));
-        assertTrue(StringUtils.isIdenticalAfterDowncase(""));
-    }
-
-    private static void checkCapitalize(final String src, final String dst,
-            final int[] sortedSeparators, final Locale locale) {
-        assertEquals(dst, StringUtils.capitalizeEachWord(src, sortedSeparators, locale));
-        assert(src.equals(dst)
-                == StringUtils.isIdenticalAfterCapitalizeEachWord(src, sortedSeparators));
-    }
-
-    private static final int[] SPACE = { Constants.CODE_SPACE };
-    private static final int[] SPACE_PERIOD = StringUtils.toSortedCodePointArray(" .");
-    private static final int[] SENTENCE_SEPARATORS =
-            StringUtils.toSortedCodePointArray(" \n.!?*()&");
-    private static final int[] WORD_SEPARATORS = StringUtils.toSortedCodePointArray(" \n.!?*,();&");
-
-    public void testCapitalizeEachWord() {
-        checkCapitalize("", "", SPACE, Locale.ENGLISH);
-        checkCapitalize("test", "Test", SPACE, Locale.ENGLISH);
-        checkCapitalize("    test", "    Test", SPACE, Locale.ENGLISH);
-        checkCapitalize("Test", "Test", SPACE, Locale.ENGLISH);
-        checkCapitalize("    Test", "    Test", SPACE, Locale.ENGLISH);
-        checkCapitalize(".Test", ".test", SPACE, Locale.ENGLISH);
-        checkCapitalize(".Test", ".Test", SPACE_PERIOD, Locale.ENGLISH);
-        checkCapitalize("test and retest", "Test And Retest", SPACE_PERIOD, Locale.ENGLISH);
-        checkCapitalize("Test and retest", "Test And Retest", SPACE_PERIOD, Locale.ENGLISH);
-        checkCapitalize("Test And Retest", "Test And Retest", SPACE_PERIOD, Locale.ENGLISH);
-        checkCapitalize("Test And.Retest  ", "Test And.Retest  ", SPACE_PERIOD, Locale.ENGLISH);
-        checkCapitalize("Test And.retest  ", "Test And.Retest  ", SPACE_PERIOD, Locale.ENGLISH);
-        checkCapitalize("Test And.retest  ", "Test And.retest  ", SPACE, Locale.ENGLISH);
-        checkCapitalize("Test And.Retest  ", "Test And.retest  ", SPACE, Locale.ENGLISH);
-        checkCapitalize("test and ietest", "Test And İetest", SPACE_PERIOD, new Locale("tr"));
-        checkCapitalize("test and ietest", "Test And Ietest", SPACE_PERIOD, Locale.ENGLISH);
-        checkCapitalize("Test&Retest", "Test&Retest", SENTENCE_SEPARATORS, Locale.ENGLISH);
-        checkCapitalize("Test&retest", "Test&Retest", SENTENCE_SEPARATORS, Locale.ENGLISH);
-        checkCapitalize("test&Retest", "Test&Retest", SENTENCE_SEPARATORS, Locale.ENGLISH);
-        checkCapitalize("rest\nrecreation! And in the end...",
-                "Rest\nRecreation! And In The End...", WORD_SEPARATORS, Locale.ENGLISH);
-        checkCapitalize("lorem ipsum dolor sit amet", "Lorem Ipsum Dolor Sit Amet",
-                WORD_SEPARATORS, Locale.ENGLISH);
-        checkCapitalize("Lorem!Ipsum (Dolor) Sit * Amet", "Lorem!Ipsum (Dolor) Sit * Amet",
-                WORD_SEPARATORS, Locale.ENGLISH);
-        checkCapitalize("Lorem!Ipsum (dolor) Sit * Amet", "Lorem!Ipsum (Dolor) Sit * Amet",
-                WORD_SEPARATORS, Locale.ENGLISH);
-    }
-
-    public void testLooksLikeURL() {
-        assertTrue(StringUtils.lastPartLooksLikeURL("http://www.google."));
-        assertFalse(StringUtils.lastPartLooksLikeURL("word wo"));
-        assertTrue(StringUtils.lastPartLooksLikeURL("/etc/foo"));
-        assertFalse(StringUtils.lastPartLooksLikeURL("left/right"));
-        assertTrue(StringUtils.lastPartLooksLikeURL("www.goo"));
-        assertTrue(StringUtils.lastPartLooksLikeURL("www."));
-        assertFalse(StringUtils.lastPartLooksLikeURL("U.S.A"));
-        assertFalse(StringUtils.lastPartLooksLikeURL("U.S.A."));
-        assertTrue(StringUtils.lastPartLooksLikeURL("rtsp://foo."));
-        assertTrue(StringUtils.lastPartLooksLikeURL("://"));
-        assertFalse(StringUtils.lastPartLooksLikeURL("abc/"));
-        assertTrue(StringUtils.lastPartLooksLikeURL("abc.def/ghi"));
-        assertFalse(StringUtils.lastPartLooksLikeURL("abc.def"));
-        // TODO: ideally this would not look like a URL, but to keep down the complexity of the
-        // code for now True is acceptable.
-        assertTrue(StringUtils.lastPartLooksLikeURL("abc./def"));
-        // TODO: ideally this would not look like a URL, but to keep down the complexity of the
-        // code for now True is acceptable.
-        assertTrue(StringUtils.lastPartLooksLikeURL(".abc/def"));
-    }
-
-    public void testHexStringUtils() {
-        final byte[] bytes = new byte[] { (byte)0x01, (byte)0x11, (byte)0x22, (byte)0x33,
-                (byte)0x55, (byte)0x88, (byte)0xEE };
-        final String bytesStr = StringUtils.byteArrayToHexString(bytes);
-        final byte[] bytes2 = StringUtils.hexStringToByteArray(bytesStr);
-        for (int i = 0; i < bytes.length; ++i) {
-            assertTrue(bytes[i] == bytes2[i]);
-        }
-        final String bytesStr2 = StringUtils.byteArrayToHexString(bytes2);
-        assertTrue(bytesStr.equals(bytesStr2));
-    }
-
-    public void testJsonUtils() {
-        final Object[] objs = new Object[] { 1, "aaa", "bbb", 3 };
-        final List<Object> objArray = Arrays.asList(objs);
-        final String str = JsonUtils.listToJsonStr(objArray);
-        final List<Object> newObjArray = JsonUtils.jsonStrToList(str);
-        for (int i = 0; i < objs.length; ++i) {
-            assertEquals(objs[i], newObjArray.get(i));
-        }
-    }
-
-    public void testToCodePointArray() {
-        final String STR_WITH_SUPPLEMENTARY_CHAR = "abcde\uD861\uDED7fgh\u0000\u2002\u2003\u3000xx";
-        final int[] EXPECTED_RESULT = new int[] { 'a', 'b', 'c', 'd', 'e', 0x286D7, 'f', 'g', 'h',
-                0, 0x2002, 0x2003, 0x3000, 'x', 'x'};
-        final int[] codePointArray = StringUtils.toCodePointArray(STR_WITH_SUPPLEMENTARY_CHAR, 0,
-                STR_WITH_SUPPLEMENTARY_CHAR.length());
-        assertEquals("toCodePointArray, size matches", codePointArray.length,
-                EXPECTED_RESULT.length);
-        for (int i = 0; i < EXPECTED_RESULT.length; ++i) {
-            assertEquals("toCodePointArray position " + i, codePointArray[i], EXPECTED_RESULT[i]);
-        }
-    }
-
-    public void testCopyCodePointsAndReturnCodePointCount() {
-        final String STR_WITH_SUPPLEMENTARY_CHAR = "AbcDE\uD861\uDED7fGh\u0000\u2002\u3000あx";
-        final int[] EXPECTED_RESULT = new int[] { 'A', 'b', 'c', 'D', 'E', 0x286D7,
-                'f', 'G', 'h', 0, 0x2002, 0x3000, 'あ', 'x'};
-        final int[] EXPECTED_RESULT_DOWNCASE = new int[] { 'a', 'b', 'c', 'd', 'e', 0x286D7,
-                'f', 'g', 'h', 0, 0x2002, 0x3000, 'あ', 'x'};
-
-        int[] codePointArray = new int[50];
-        int codePointCount = StringUtils.copyCodePointsAndReturnCodePointCount(codePointArray,
-                STR_WITH_SUPPLEMENTARY_CHAR, 0,
-                STR_WITH_SUPPLEMENTARY_CHAR.length(), false /* downCase */);
-        assertEquals("copyCodePointsAndReturnCodePointCount, size matches", codePointCount,
-                EXPECTED_RESULT.length);
-        for (int i = 0; i < codePointCount; ++i) {
-            assertEquals("copyCodePointsAndReturnCodePointCount position " + i, codePointArray[i],
-                    EXPECTED_RESULT[i]);
-        }
-
-        codePointCount = StringUtils.copyCodePointsAndReturnCodePointCount(codePointArray,
-                STR_WITH_SUPPLEMENTARY_CHAR, 0,
-                STR_WITH_SUPPLEMENTARY_CHAR.length(), true /* downCase */);
-        assertEquals("copyCodePointsAndReturnCodePointCount downcase, size matches", codePointCount,
-                EXPECTED_RESULT_DOWNCASE.length);
-        for (int i = 0; i < codePointCount; ++i) {
-            assertEquals("copyCodePointsAndReturnCodePointCount position " + i, codePointArray[i],
-                    EXPECTED_RESULT_DOWNCASE[i]);
-        }
-
-        final int JAVA_CHAR_COUNT = 8;
-        final int CODEPOINT_COUNT = 7;
-        codePointCount = StringUtils.copyCodePointsAndReturnCodePointCount(codePointArray,
-                STR_WITH_SUPPLEMENTARY_CHAR, 0, JAVA_CHAR_COUNT, false /* downCase */);
-        assertEquals("copyCodePointsAndReturnCodePointCount, size matches", codePointCount,
-                CODEPOINT_COUNT);
-        for (int i = 0; i < codePointCount; ++i) {
-            assertEquals("copyCodePointsAndReturnCodePointCount position " + i, codePointArray[i],
-                    EXPECTED_RESULT[i]);
-        }
-
-        boolean exceptionHappened = false;
-        codePointArray = new int[5];
-        try {
-            codePointCount = StringUtils.copyCodePointsAndReturnCodePointCount(codePointArray,
-                    STR_WITH_SUPPLEMENTARY_CHAR, 0, JAVA_CHAR_COUNT, false /* downCase */);
-        } catch (ArrayIndexOutOfBoundsException e) {
-            exceptionHappened = true;
-        }
-        assertTrue("copyCodePointsAndReturnCodePointCount throws when array is too small",
-                exceptionHappened);
-    }
-
-    public void testGetTrailingSingleQuotesCount() {
-        assertEquals(0, StringUtils.getTrailingSingleQuotesCount(""));
-        assertEquals(1, StringUtils.getTrailingSingleQuotesCount("'"));
-        assertEquals(5, StringUtils.getTrailingSingleQuotesCount("'''''"));
-        assertEquals(0, StringUtils.getTrailingSingleQuotesCount("a"));
-        assertEquals(0, StringUtils.getTrailingSingleQuotesCount("'this"));
-        assertEquals(1, StringUtils.getTrailingSingleQuotesCount("'word'"));
-        assertEquals(0, StringUtils.getTrailingSingleQuotesCount("I'm"));
-    }
-
-    private static void assertSpanCount(final int expectedCount, final CharSequence cs) {
-        final int actualCount;
-        if (cs instanceof Spanned) {
-            final Spanned spanned = (Spanned) cs;
-            actualCount = spanned.getSpans(0, spanned.length(), Object.class).length;
-        } else {
-            actualCount = 0;
-        }
-        assertEquals(expectedCount, actualCount);
-    }
-
-    private static void assertSpan(final CharSequence cs, final Object expectedSpan,
-            final int expectedStart, final int expectedEnd, final int expectedFlags) {
-        assertTrue(cs instanceof Spanned);
-        final Spanned spanned = (Spanned) cs;
-        final Object[] actualSpans = spanned.getSpans(0, spanned.length(), Object.class);
-        for (Object actualSpan : actualSpans) {
-            if (actualSpan == expectedSpan) {
-                final int actualStart = spanned.getSpanStart(actualSpan);
-                final int actualEnd = spanned.getSpanEnd(actualSpan);
-                final int actualFlags = spanned.getSpanFlags(actualSpan);
-                assertEquals(expectedStart, actualStart);
-                assertEquals(expectedEnd, actualEnd);
-                assertEquals(expectedFlags, actualFlags);
-                return;
-            }
-        }
-        assertTrue(false);
-    }
-
-    public void testSplitCharSequenceWithSpan() {
-        // text:  " a bcd efg hij  "
-        // span1:  ^^^^^^^
-        // span2:  ^^^^^
-        // span3:              ^
-        final SpannableString spannableString = new SpannableString(" a bcd efg hij  ");
-        final Object span1 = new Object();
-        final Object span2 = new Object();
-        final Object span3 = new Object();
-        final int SPAN1_FLAGS = Spanned.SPAN_EXCLUSIVE_EXCLUSIVE;
-        final int SPAN2_FLAGS = Spanned.SPAN_EXCLUSIVE_INCLUSIVE;
-        final int SPAN3_FLAGS = Spanned.SPAN_INCLUSIVE_INCLUSIVE;
-        spannableString.setSpan(span1, 0, 7, SPAN1_FLAGS);
-        spannableString.setSpan(span2, 0, 5, SPAN2_FLAGS);
-        spannableString.setSpan(span3, 12, 13, SPAN3_FLAGS);
-        final CharSequence[] charSequencesFromSpanned = SpannableStringUtils.split(
-                spannableString, " ", true /* preserveTrailingEmptySegmengs */);
-        final CharSequence[] charSequencesFromString = SpannableStringUtils.split(
-                spannableString.toString(), " ", true /* preserveTrailingEmptySegmengs */);
-
-
-        assertEquals(7, charSequencesFromString.length);
-        assertEquals(7, charSequencesFromSpanned.length);
-
-        // text:  ""
-        // span1: ^
-        // span2: ^
-        // span3:
-        assertEquals("", charSequencesFromString[0].toString());
-        assertSpanCount(0, charSequencesFromString[0]);
-        assertEquals("", charSequencesFromSpanned[0].toString());
-        assertSpanCount(2, charSequencesFromSpanned[0]);
-        assertSpan(charSequencesFromSpanned[0], span1, 0, 0, SPAN1_FLAGS);
-        assertSpan(charSequencesFromSpanned[0], span2, 0, 0, SPAN2_FLAGS);
-
-        // text:  "a"
-        // span1:  ^
-        // span2:  ^
-        // span3:
-        assertEquals("a", charSequencesFromString[1].toString());
-        assertSpanCount(0, charSequencesFromString[1]);
-        assertEquals("a", charSequencesFromSpanned[1].toString());
-        assertSpanCount(2, charSequencesFromSpanned[1]);
-        assertSpan(charSequencesFromSpanned[1], span1, 0, 1, SPAN1_FLAGS);
-        assertSpan(charSequencesFromSpanned[1], span2, 0, 1, SPAN2_FLAGS);
-
-        // text:  "bcd"
-        // span1:  ^^^
-        // span2:  ^^
-        // span3:
-        assertEquals("bcd", charSequencesFromString[2].toString());
-        assertSpanCount(0, charSequencesFromString[2]);
-        assertEquals("bcd", charSequencesFromSpanned[2].toString());
-        assertSpanCount(2, charSequencesFromSpanned[2]);
-        assertSpan(charSequencesFromSpanned[2], span1, 0, 3, SPAN1_FLAGS);
-        assertSpan(charSequencesFromSpanned[2], span2, 0, 2, SPAN2_FLAGS);
-
-        // text:  "efg"
-        // span1:
-        // span2:
-        // span3:
-        assertEquals("efg", charSequencesFromString[3].toString());
-        assertSpanCount(0, charSequencesFromString[3]);
-        assertEquals("efg", charSequencesFromSpanned[3].toString());
-        assertSpanCount(0, charSequencesFromSpanned[3]);
-
-        // text:  "hij"
-        // span1:
-        // span2:
-        // span3:   ^
-        assertEquals("hij", charSequencesFromString[4].toString());
-        assertSpanCount(0, charSequencesFromString[4]);
-        assertEquals("hij", charSequencesFromSpanned[4].toString());
-        assertSpanCount(1, charSequencesFromSpanned[4]);
-        assertSpan(charSequencesFromSpanned[4], span3, 1, 2, SPAN3_FLAGS);
-
-        // text:  ""
-        // span1:
-        // span2:
-        // span3:
-        assertEquals("", charSequencesFromString[5].toString());
-        assertSpanCount(0, charSequencesFromString[5]);
-        assertEquals("", charSequencesFromSpanned[5].toString());
-        assertSpanCount(0, charSequencesFromSpanned[5]);
-
-        // text:  ""
-        // span1:
-        // span2:
-        // span3:
-        assertEquals("", charSequencesFromString[6].toString());
-        assertSpanCount(0, charSequencesFromString[6]);
-        assertEquals("", charSequencesFromSpanned[6].toString());
-        assertSpanCount(0, charSequencesFromSpanned[6]);
-    }
-
-    public void testSplitCharSequencePreserveTrailingEmptySegmengs() {
-        assertEquals(1, SpannableStringUtils.split("", " ",
-                false /* preserveTrailingEmptySegmengs */).length);
-        assertEquals(1, SpannableStringUtils.split(new SpannedString(""), " ",
-                false /* preserveTrailingEmptySegmengs */).length);
-
-        assertEquals(1, SpannableStringUtils.split("", " ",
-                true /* preserveTrailingEmptySegmengs */).length);
-        assertEquals(1, SpannableStringUtils.split(new SpannedString(""), " ",
-                true /* preserveTrailingEmptySegmengs */).length);
-
-        assertEquals(0, SpannableStringUtils.split(" ", " ",
-                false /* preserveTrailingEmptySegmengs */).length);
-        assertEquals(0, SpannableStringUtils.split(new SpannedString(" "), " ",
-                false /* preserveTrailingEmptySegmengs */).length);
-
-        assertEquals(2, SpannableStringUtils.split(" ", " ",
-                true /* preserveTrailingEmptySegmengs */).length);
-        assertEquals(2, SpannableStringUtils.split(new SpannedString(" "), " ",
-                true /* preserveTrailingEmptySegmengs */).length);
-
-        assertEquals(3, SpannableStringUtils.split("a b c  ", " ",
-                false /* preserveTrailingEmptySegmengs */).length);
-        assertEquals(3, SpannableStringUtils.split(new SpannedString("a b c  "), " ",
-                false /* preserveTrailingEmptySegmengs */).length);
-
-        assertEquals(5, SpannableStringUtils.split("a b c  ", " ",
-                true /* preserveTrailingEmptySegmengs */).length);
-        assertEquals(5, SpannableStringUtils.split(new SpannedString("a b c  "), " ",
-                true /* preserveTrailingEmptySegmengs */).length);
-
-        assertEquals(6, SpannableStringUtils.split("a     b ", " ",
-                false /* preserveTrailingEmptySegmengs */).length);
-        assertEquals(6, SpannableStringUtils.split(new SpannedString("a     b "), " ",
-                false /* preserveTrailingEmptySegmengs */).length);
-
-        assertEquals(7, SpannableStringUtils.split("a     b ", " ",
-                true /* preserveTrailingEmptySegmengs */).length);
-        assertEquals(7, SpannableStringUtils.split(new SpannedString("a     b "), " ",
-                true /* preserveTrailingEmptySegmengs */).length);
-    }
-}