tests/inputmethod/src/android/view/inputmethod/cts/EditorInfoTest.java - platform/cts - Git at Google

 /*
  * Copyright (C) 2009 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 android.view.inputmethod.cts;

 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;

 import android.os.Bundle;
 import android.os.LocaleList;
 import android.os.Parcel;
 import android.test.MoreAsserts;
 import android.text.SpannableStringBuilder;
 import android.text.TextUtils;
 import android.util.StringBuilderPrinter;
 import android.view.inputmethod.EditorInfo;
 import android.view.inputmethod.InputConnection;

 import androidx.test.filters.SmallTest;
 import androidx.test.runner.AndroidJUnit4;

 import org.junit.Test;
 import org.junit.runner.RunWith;

 @SmallTest
 @RunWith(AndroidJUnit4.class)
 public class EditorInfoTest {
     private static final int TEST_TEXT_LENGTH = 2048;
     /** A text with 1 million chars! This is way too long. */
     private static final int OVER_SIZED_TEXT_LENGTH = 1 * 1024 * 1024;
     /** To get the longest available text from getInitialText methods. */
     private static final int REQUEST_LONGEST_AVAILABLE_TEXT = OVER_SIZED_TEXT_LENGTH; //

     @Test
     public void testEditorInfo() {
         EditorInfo info = new EditorInfo();
         CharSequence testInitialText = createTestText(TEST_TEXT_LENGTH);

         info.actionId = 1;
         info.actionLabel = "actionLabel";
         info.fieldId = 2;
         info.fieldName = "fieldName";
         info.hintText = "hintText";
         info.imeOptions = EditorInfo.IME_FLAG_NO_ENTER_ACTION;
         info.initialCapsMode = TextUtils.CAP_MODE_CHARACTERS;
         info.initialSelEnd = 10;
         info.initialSelStart = 0;
         info.inputType = EditorInfo.TYPE_MASK_CLASS;
         info.label = "label";
         info.packageName = "android.view.cts";
         info.privateImeOptions = "privateIme";
         Bundle b = new Bundle();
         info.setInitialSurroundingText(testInitialText);
         String key = "bundleKey";
         String value = "bundleValue";
         b.putString(key, value);
         info.extras = b;
         info.hintLocales = LocaleList.forLanguageTags("en-PH,en-US");
         info.contentMimeTypes = new String[]{"image/gif", "image/png"};

         assertEquals(0, info.describeContents());

         Parcel p = Parcel.obtain();
         info.writeToParcel(p, 0);
         p.setDataPosition(0);
         EditorInfo targetInfo = EditorInfo.CREATOR.createFromParcel(p);
         p.recycle();
         assertEquals(info.actionId, targetInfo.actionId);
         assertEquals(info.fieldId, targetInfo.fieldId);
         assertEquals(info.fieldName, targetInfo.fieldName);
         assertEquals(info.imeOptions, targetInfo.imeOptions);
         assertEquals(info.initialCapsMode, targetInfo.initialCapsMode);
         assertEquals(info.initialSelEnd, targetInfo.initialSelEnd);
         assertEquals(info.initialSelStart, targetInfo.initialSelStart);
         assertEquals(info.inputType, targetInfo.inputType);
         assertEquals(info.packageName, targetInfo.packageName);
         assertEquals(info.privateImeOptions, targetInfo.privateImeOptions);
         assertTrue(TextUtils.equals(testInitialText, concateInitialSurroundingText(targetInfo)));
         assertEquals(info.hintText.toString(), targetInfo.hintText.toString());
         assertEquals(info.actionLabel.toString(), targetInfo.actionLabel.toString());
         assertEquals(info.label.toString(), targetInfo.label.toString());
         assertEquals(info.extras.getString(key), targetInfo.extras.getString(key));
         assertEquals(info.hintLocales, targetInfo.hintLocales);
         MoreAsserts.assertEquals(info.contentMimeTypes, targetInfo.contentMimeTypes);

         StringBuilder sb = new StringBuilder();
         StringBuilderPrinter sbPrinter = new StringBuilderPrinter(sb);
         String prefix = "TestEditorInfo";
         info.dump(sbPrinter, prefix);

         assertFalse(TextUtils.isEmpty(sb.toString()));
         assertFalse(sb.toString().contains(testInitialText));
     }

     @Test
     public void testNullHintLocals() {
         EditorInfo info = new EditorInfo();
         info.hintLocales = null;
         Parcel p = Parcel.obtain();
         info.writeToParcel(p, 0);
         p.setDataPosition(0);
         EditorInfo targetInfo = EditorInfo.CREATOR.createFromParcel(p);
         p.recycle();
         assertNull(targetInfo.hintLocales);
     }

     @Test
     public void testInitialSurroundingText_nullInput_throwsException() {
         final EditorInfo info = new EditorInfo();

         try {
             info.setInitialSurroundingText(null);
             fail("Shall not take null input");
         } catch (NullPointerException expected) {
             // Expected behavior, nothing to do.
         }
     }

     @Test
     public void testInitialSurroundingText_passwordTypes_notObtain() {
         final EditorInfo info = new EditorInfo();
         final CharSequence testInitialText = createTestText(/* size= */ 10);
         info.initialSelStart = 1;
         info.initialSelEnd = 2;

         // Text password type
         info.inputType = (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD);

         info.setInitialSurroundingText(testInitialText);

         assertExpectedTextLength(info,
                 /* expectBeforeCursorLength= */null,
                 /* expectSelectionLength= */null,
                 /* expectAfterCursorLength= */null);

         // Web password type
         info.inputType = (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD);

         info.setInitialSurroundingText(testInitialText);

         assertExpectedTextLength(info,
                 /* expectBeforeCursorLength= */null,
                 /* expectSelectionLength= */null,
                 /* expectAfterCursorLength= */null);

         // Number password type
         info.inputType = (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);

         info.setInitialSurroundingText(testInitialText);

         assertExpectedTextLength(info,
                 /* expectBeforeCursorLength= */null,
                 /* expectSelectionLength= */null,
                 /* expectAfterCursorLength= */null);
     }

     @Test
     public void testInitialSurroundingText_cursorAtHead_emptyBeforeCursorText() {
         final EditorInfo info = new EditorInfo();
         final CharSequence testText = createTestText(TEST_TEXT_LENGTH);
         final int selLength = 10;
         info.initialSelStart = 0;
         info.initialSelEnd = info.initialSelStart + selLength;
         final int expectedTextBeforeCursorLength = 0;
         final int expectedTextAfterCursorLength = testText.length() - selLength;

         info.setInitialSurroundingText(testText);

         assertExpectedTextLength(info, expectedTextBeforeCursorLength, selLength,
                 expectedTextAfterCursorLength);
     }

     @Test
     public void testInitialSurroundingText_cursorAtTail_emptyAfterCursorText() {
         final EditorInfo info = new EditorInfo();
         final CharSequence testText = createTestText(TEST_TEXT_LENGTH);
         final int selLength = 10;
         info.initialSelStart = testText.length() - selLength;
         info.initialSelEnd = testText.length();
         final int expectedTextBeforeCursorLength = testText.length() - selLength;
         final int expectedTextAfterCursorLength = 0;

         info.setInitialSurroundingText(testText);

         assertExpectedTextLength(info, expectedTextBeforeCursorLength, selLength,
                 expectedTextAfterCursorLength);
     }

     @Test
     public void testInitialSurroundingText_noSelection_emptySelectionText() {
         final EditorInfo info = new EditorInfo();
         final CharSequence testText = createTestText(TEST_TEXT_LENGTH);
         final int selLength = 0;
         info.initialSelStart = 0;
         info.initialSelEnd = info.initialSelStart + selLength;
         final int expectedTextBeforeCursorLength = 0;
         final int expectedTextAfterCursorLength = testText.length();

         info.setInitialSurroundingText(testText);

         assertExpectedTextLength(info, expectedTextBeforeCursorLength, selLength,
                 expectedTextAfterCursorLength);
     }

     @Test
     public void testInitialSurroundingText_overSizedSeleciton_keepsBeforeAfterTextValid() {
         final EditorInfo info = new EditorInfo();
         final CharSequence testText = createTestText(OVER_SIZED_TEXT_LENGTH);
         final int selLength = OVER_SIZED_TEXT_LENGTH - 2;
         info.initialSelStart = 1;
         info.initialSelEnd = info.initialSelStart + selLength;
         final int expectedTextBeforeCursorLength = 1;
         final int expectedTextAfterCursorLength = 1;

         info.setInitialSurroundingText(testText);

         assertExpectedTextLength(info, expectedTextBeforeCursorLength,
                 /* expectSelectionLength= */null, expectedTextAfterCursorLength);
     }

     @Test
     public void testInitialSurroundingSubText_keepsOriginalCursorPosition() {
         final EditorInfo info = new EditorInfo();
         final String prefixString = "prefix";
         final CharSequence subText = createTestText(TEST_TEXT_LENGTH);
         final CharSequence originalText = TextUtils.concat(prefixString, subText);
         final int selLength = 2;
         info.initialSelStart = originalText.length() / 2;
         info.initialSelEnd = info.initialSelStart + selLength;
         final CharSequence expectedTextBeforeCursor = createExpectedText(/* startNumber= */0,
                 info.initialSelStart - prefixString.length());
         final CharSequence expectedSelectedText = createExpectedText(
                 info.initialSelStart - prefixString.length(), selLength);
         final CharSequence expectedTextAfterCursor = createExpectedText(
                 info.initialSelEnd - prefixString.length(),
                 originalText.length() - info.initialSelEnd);

         info.setInitialSurroundingSubText(subText, prefixString.length());

         assertTrue(TextUtils.equals(expectedTextBeforeCursor,
                 info.getInitialTextBeforeCursor(REQUEST_LONGEST_AVAILABLE_TEXT,
                         InputConnection.GET_TEXT_WITH_STYLES)));
         assertTrue(TextUtils.equals(expectedSelectedText,
                 info.getInitialSelectedText(InputConnection.GET_TEXT_WITH_STYLES)));
         assertTrue(TextUtils.equals(expectedTextAfterCursor,
                 info.getInitialTextAfterCursor(REQUEST_LONGEST_AVAILABLE_TEXT,
                         InputConnection.GET_TEXT_WITH_STYLES)));
     }

     private static void assertExpectedTextLength(EditorInfo editorInfo,
             Integer expectBeforeCursorLength, Integer expectSelectionLength,
             Integer expectAfterCursorLength) {
         final CharSequence textBeforeCursor =
                 editorInfo.getInitialTextBeforeCursor(REQUEST_LONGEST_AVAILABLE_TEXT,
                         InputConnection.GET_TEXT_WITH_STYLES);
         final CharSequence selectedText =
                 editorInfo.getInitialSelectedText(InputConnection.GET_TEXT_WITH_STYLES);
         final CharSequence textAfterCursor =
                 editorInfo.getInitialTextAfterCursor(REQUEST_LONGEST_AVAILABLE_TEXT,
                         InputConnection.GET_TEXT_WITH_STYLES);

         if (expectBeforeCursorLength == null) {
             assertNull(textBeforeCursor);
         } else {
             assertEquals(expectBeforeCursorLength.intValue(), textBeforeCursor.length());
         }

         if (expectSelectionLength == null) {
             assertNull(selectedText);
         } else {
             assertEquals(expectSelectionLength.intValue(), selectedText.length());
         }

         if (expectAfterCursorLength == null) {
             assertNull(textAfterCursor);
         } else {
             assertEquals(expectAfterCursorLength.intValue(), textAfterCursor.length());
         }
     }

     private static CharSequence createTestText(int size) {
         final SpannableStringBuilder builder = new SpannableStringBuilder();
         for (int i = 0; i < size; i++) {
             builder.append(Integer.toString(i % 10));
         }
         return builder;
     }

     private static CharSequence createExpectedText(int startNumber, int length) {
         final SpannableStringBuilder builder = new SpannableStringBuilder();
         for (int i = startNumber; i < startNumber + length; i++) {
             builder.append(Integer.toString(i % 10));
         }
         return builder;
     }

     private static CharSequence concateInitialSurroundingText(EditorInfo info) {
         final CharSequence textBeforeCursor =
                 nullToEmpty(info.getInitialTextBeforeCursor(REQUEST_LONGEST_AVAILABLE_TEXT,
                         InputConnection.GET_TEXT_WITH_STYLES));
         final CharSequence selectedText =
                 nullToEmpty(info.getInitialSelectedText(InputConnection.GET_TEXT_WITH_STYLES));
         final CharSequence textAfterCursor =
                 nullToEmpty(info.getInitialTextAfterCursor(REQUEST_LONGEST_AVAILABLE_TEXT,
                         InputConnection.GET_TEXT_WITH_STYLES));

         return TextUtils.concat(textBeforeCursor, selectedText, textAfterCursor);
     }

     private static CharSequence nullToEmpty(CharSequence source) {
         return (source == null) ? new SpannableStringBuilder("") : source;
     }
 }
	/*
	* Copyright (C) 2009 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 android.view.inputmethod.cts;

	import static org.junit.Assert.assertEquals;
	import static org.junit.Assert.assertFalse;
	import static org.junit.Assert.assertNull;
	import static org.junit.Assert.assertTrue;
	import static org.junit.Assert.fail;

	import android.os.Bundle;
	import android.os.LocaleList;
	import android.os.Parcel;
	import android.test.MoreAsserts;
	import android.text.SpannableStringBuilder;
	import android.text.TextUtils;
	import android.util.StringBuilderPrinter;
	import android.view.inputmethod.EditorInfo;
	import android.view.inputmethod.InputConnection;

	import androidx.test.filters.SmallTest;
	import androidx.test.runner.AndroidJUnit4;

	import org.junit.Test;
	import org.junit.runner.RunWith;

	@SmallTest
	@RunWith(AndroidJUnit4.class)
	public class EditorInfoTest {
	private static final int TEST_TEXT_LENGTH = 2048;
	/** A text with 1 million chars! This is way too long. */
	private static final int OVER_SIZED_TEXT_LENGTH = 1 * 1024 * 1024;
	/** To get the longest available text from getInitialText methods. */
	private static final int REQUEST_LONGEST_AVAILABLE_TEXT = OVER_SIZED_TEXT_LENGTH; //

	@Test
	public void testEditorInfo() {
	EditorInfo info = new EditorInfo();
	CharSequence testInitialText = createTestText(TEST_TEXT_LENGTH);

	info.actionId = 1;
	info.actionLabel = "actionLabel";
	info.fieldId = 2;
	info.fieldName = "fieldName";
	info.hintText = "hintText";
	info.imeOptions = EditorInfo.IME_FLAG_NO_ENTER_ACTION;
	info.initialCapsMode = TextUtils.CAP_MODE_CHARACTERS;
	info.initialSelEnd = 10;
	info.initialSelStart = 0;
	info.inputType = EditorInfo.TYPE_MASK_CLASS;
	info.label = "label";
	info.packageName = "android.view.cts";
	info.privateImeOptions = "privateIme";
	Bundle b = new Bundle();
	info.setInitialSurroundingText(testInitialText);
	String key = "bundleKey";
	String value = "bundleValue";
	b.putString(key, value);
	info.extras = b;
	info.hintLocales = LocaleList.forLanguageTags("en-PH,en-US");
	info.contentMimeTypes = new String[]{"image/gif", "image/png"};

	assertEquals(0, info.describeContents());

	Parcel p = Parcel.obtain();
	info.writeToParcel(p, 0);
	p.setDataPosition(0);
	EditorInfo targetInfo = EditorInfo.CREATOR.createFromParcel(p);
	p.recycle();
	assertEquals(info.actionId, targetInfo.actionId);
	assertEquals(info.fieldId, targetInfo.fieldId);
	assertEquals(info.fieldName, targetInfo.fieldName);
	assertEquals(info.imeOptions, targetInfo.imeOptions);
	assertEquals(info.initialCapsMode, targetInfo.initialCapsMode);
	assertEquals(info.initialSelEnd, targetInfo.initialSelEnd);
	assertEquals(info.initialSelStart, targetInfo.initialSelStart);
	assertEquals(info.inputType, targetInfo.inputType);
	assertEquals(info.packageName, targetInfo.packageName);
	assertEquals(info.privateImeOptions, targetInfo.privateImeOptions);
	assertTrue(TextUtils.equals(testInitialText, concateInitialSurroundingText(targetInfo)));
	assertEquals(info.hintText.toString(), targetInfo.hintText.toString());
	assertEquals(info.actionLabel.toString(), targetInfo.actionLabel.toString());
	assertEquals(info.label.toString(), targetInfo.label.toString());
	assertEquals(info.extras.getString(key), targetInfo.extras.getString(key));
	assertEquals(info.hintLocales, targetInfo.hintLocales);
	MoreAsserts.assertEquals(info.contentMimeTypes, targetInfo.contentMimeTypes);

	StringBuilder sb = new StringBuilder();
	StringBuilderPrinter sbPrinter = new StringBuilderPrinter(sb);
	String prefix = "TestEditorInfo";
	info.dump(sbPrinter, prefix);

	assertFalse(TextUtils.isEmpty(sb.toString()));
	assertFalse(sb.toString().contains(testInitialText));
	}

	@Test
	public void testNullHintLocals() {
	EditorInfo info = new EditorInfo();
	info.hintLocales = null;
	Parcel p = Parcel.obtain();
	info.writeToParcel(p, 0);
	p.setDataPosition(0);
	EditorInfo targetInfo = EditorInfo.CREATOR.createFromParcel(p);
	p.recycle();
	assertNull(targetInfo.hintLocales);
	}

	@Test
	public void testInitialSurroundingText_nullInput_throwsException() {
	final EditorInfo info = new EditorInfo();

	try {
	info.setInitialSurroundingText(null);
	fail("Shall not take null input");
	} catch (NullPointerException expected) {
	// Expected behavior, nothing to do.
	}
	}

	@Test
	public void testInitialSurroundingText_passwordTypes_notObtain() {
	final EditorInfo info = new EditorInfo();
	final CharSequence testInitialText = createTestText(/* size= */ 10);
	info.initialSelStart = 1;
	info.initialSelEnd = 2;

	// Text password type
	info.inputType = (EditorInfo.TYPE_CLASS_TEXT \| EditorInfo.TYPE_TEXT_VARIATION_PASSWORD);

	info.setInitialSurroundingText(testInitialText);

	assertExpectedTextLength(info,
	/* expectBeforeCursorLength= */null,
	/* expectSelectionLength= */null,
	/* expectAfterCursorLength= */null);

	// Web password type
	info.inputType = (EditorInfo.TYPE_CLASS_TEXT \| EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD);

	info.setInitialSurroundingText(testInitialText);

	assertExpectedTextLength(info,
	/* expectBeforeCursorLength= */null,
	/* expectSelectionLength= */null,
	/* expectAfterCursorLength= */null);

	// Number password type
	info.inputType = (EditorInfo.TYPE_CLASS_NUMBER \| EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);

	info.setInitialSurroundingText(testInitialText);

	assertExpectedTextLength(info,
	/* expectBeforeCursorLength= */null,
	/* expectSelectionLength= */null,
	/* expectAfterCursorLength= */null);
	}

	@Test
	public void testInitialSurroundingText_cursorAtHead_emptyBeforeCursorText() {
	final EditorInfo info = new EditorInfo();
	final CharSequence testText = createTestText(TEST_TEXT_LENGTH);
	final int selLength = 10;
	info.initialSelStart = 0;
	info.initialSelEnd = info.initialSelStart + selLength;
	final int expectedTextBeforeCursorLength = 0;
	final int expectedTextAfterCursorLength = testText.length() - selLength;

	info.setInitialSurroundingText(testText);

	assertExpectedTextLength(info, expectedTextBeforeCursorLength, selLength,
	expectedTextAfterCursorLength);
	}

	@Test
	public void testInitialSurroundingText_cursorAtTail_emptyAfterCursorText() {
	final EditorInfo info = new EditorInfo();
	final CharSequence testText = createTestText(TEST_TEXT_LENGTH);
	final int selLength = 10;
	info.initialSelStart = testText.length() - selLength;
	info.initialSelEnd = testText.length();
	final int expectedTextBeforeCursorLength = testText.length() - selLength;
	final int expectedTextAfterCursorLength = 0;

	info.setInitialSurroundingText(testText);

	assertExpectedTextLength(info, expectedTextBeforeCursorLength, selLength,
	expectedTextAfterCursorLength);
	}

	@Test
	public void testInitialSurroundingText_noSelection_emptySelectionText() {
	final EditorInfo info = new EditorInfo();
	final CharSequence testText = createTestText(TEST_TEXT_LENGTH);
	final int selLength = 0;
	info.initialSelStart = 0;
	info.initialSelEnd = info.initialSelStart + selLength;
	final int expectedTextBeforeCursorLength = 0;
	final int expectedTextAfterCursorLength = testText.length();

	info.setInitialSurroundingText(testText);

	assertExpectedTextLength(info, expectedTextBeforeCursorLength, selLength,
	expectedTextAfterCursorLength);
	}

	@Test
	public void testInitialSurroundingText_overSizedSeleciton_keepsBeforeAfterTextValid() {
	final EditorInfo info = new EditorInfo();
	final CharSequence testText = createTestText(OVER_SIZED_TEXT_LENGTH);
	final int selLength = OVER_SIZED_TEXT_LENGTH - 2;
	info.initialSelStart = 1;
	info.initialSelEnd = info.initialSelStart + selLength;
	final int expectedTextBeforeCursorLength = 1;
	final int expectedTextAfterCursorLength = 1;

	info.setInitialSurroundingText(testText);

	assertExpectedTextLength(info, expectedTextBeforeCursorLength,
	/* expectSelectionLength= */null, expectedTextAfterCursorLength);
	}

	@Test
	public void testInitialSurroundingSubText_keepsOriginalCursorPosition() {
	final EditorInfo info = new EditorInfo();
	final String prefixString = "prefix";
	final CharSequence subText = createTestText(TEST_TEXT_LENGTH);
	final CharSequence originalText = TextUtils.concat(prefixString, subText);
	final int selLength = 2;
	info.initialSelStart = originalText.length() / 2;
	info.initialSelEnd = info.initialSelStart + selLength;
	final CharSequence expectedTextBeforeCursor = createExpectedText(/* startNumber= */0,
	info.initialSelStart - prefixString.length());
	final CharSequence expectedSelectedText = createExpectedText(
	info.initialSelStart - prefixString.length(), selLength);
	final CharSequence expectedTextAfterCursor = createExpectedText(
	info.initialSelEnd - prefixString.length(),
	originalText.length() - info.initialSelEnd);

	info.setInitialSurroundingSubText(subText, prefixString.length());

	assertTrue(TextUtils.equals(expectedTextBeforeCursor,
	info.getInitialTextBeforeCursor(REQUEST_LONGEST_AVAILABLE_TEXT,
	InputConnection.GET_TEXT_WITH_STYLES)));
	assertTrue(TextUtils.equals(expectedSelectedText,
	info.getInitialSelectedText(InputConnection.GET_TEXT_WITH_STYLES)));
	assertTrue(TextUtils.equals(expectedTextAfterCursor,
	info.getInitialTextAfterCursor(REQUEST_LONGEST_AVAILABLE_TEXT,
	InputConnection.GET_TEXT_WITH_STYLES)));
	}

	private static void assertExpectedTextLength(EditorInfo editorInfo,
	Integer expectBeforeCursorLength, Integer expectSelectionLength,
	Integer expectAfterCursorLength) {
	final CharSequence textBeforeCursor =
	editorInfo.getInitialTextBeforeCursor(REQUEST_LONGEST_AVAILABLE_TEXT,
	InputConnection.GET_TEXT_WITH_STYLES);
	final CharSequence selectedText =
	editorInfo.getInitialSelectedText(InputConnection.GET_TEXT_WITH_STYLES);
	final CharSequence textAfterCursor =
	editorInfo.getInitialTextAfterCursor(REQUEST_LONGEST_AVAILABLE_TEXT,
	InputConnection.GET_TEXT_WITH_STYLES);

	if (expectBeforeCursorLength == null) {
	assertNull(textBeforeCursor);
	} else {
	assertEquals(expectBeforeCursorLength.intValue(), textBeforeCursor.length());
	}

	if (expectSelectionLength == null) {
	assertNull(selectedText);
	} else {
	assertEquals(expectSelectionLength.intValue(), selectedText.length());
	}

	if (expectAfterCursorLength == null) {
	assertNull(textAfterCursor);
	} else {
	assertEquals(expectAfterCursorLength.intValue(), textAfterCursor.length());
	}
	}

	private static CharSequence createTestText(int size) {
	final SpannableStringBuilder builder = new SpannableStringBuilder();
	for (int i = 0; i < size; i++) {
	builder.append(Integer.toString(i % 10));
	}
	return builder;
	}

	private static CharSequence createExpectedText(int startNumber, int length) {
	final SpannableStringBuilder builder = new SpannableStringBuilder();
	for (int i = startNumber; i < startNumber + length; i++) {
	builder.append(Integer.toString(i % 10));
	}
	return builder;
	}

	private static CharSequence concateInitialSurroundingText(EditorInfo info) {
	final CharSequence textBeforeCursor =
	nullToEmpty(info.getInitialTextBeforeCursor(REQUEST_LONGEST_AVAILABLE_TEXT,
	InputConnection.GET_TEXT_WITH_STYLES));
	final CharSequence selectedText =
	nullToEmpty(info.getInitialSelectedText(InputConnection.GET_TEXT_WITH_STYLES));
	final CharSequence textAfterCursor =
	nullToEmpty(info.getInitialTextAfterCursor(REQUEST_LONGEST_AVAILABLE_TEXT,
	InputConnection.GET_TEXT_WITH_STYLES));

	return TextUtils.concat(textBeforeCursor, selectedText, textAfterCursor);
	}

	private static CharSequence nullToEmpty(CharSequence source) {
	return (source == null) ? new SpannableStringBuilder("") : source;
	}
	}