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Commit f4afb095 authored by Seigo Nonaka's avatar Seigo Nonaka
Browse files

Add cursor positioning tests for emoji. 

Bug: 25375561
Change-Id: Id8e467bc13fc69560ea3d238765760e006c8ced5
parent 01e236b9

core/tests/coretests/src/android/text/StaticLayoutTest.java

+93 −0
Original line number Diff line number Diff line
@@ -20,6 +20,8 @@ import android.graphics.Paint.FontMetricsInt; 
import android.test.suitebuilder.annotation.SmallTest;

import android.text.Layout.Alignment;

import static android.text.Layout.Alignment.*;

import android.text.TextPaint;

import android.text.method.EditorState;

import android.util.Log;



import junit.framework.TestCase;
@@ -33,6 +35,10 @@ import junit.framework.TestCase; 
 * @Suppress

 */

public class StaticLayoutTest extends TestCase {

    private static final int DEFAULT_OUTER_WIDTH = 150;

    private static final Alignment DEFAULT_ALIGN = Alignment.ALIGN_CENTER;

    private static final float SPACE_MULTI = 1.0f;

    private static final float SPACE_ADD = 0.0f;



    /**

     * Basic test showing expected behavior and relationship between font
@@ -321,4 +327,91 @@ public class StaticLayoutTest extends TestCase { 
        assertEquals(topPad, l.getTopPadding());

        assertEquals(botPad, l.getBottomPadding());

    }



    private void moveCursorToRightCursorableOffset(EditorState state, TextPaint paint) {

        assertEquals("The editor has selection", state.mSelectionStart, state.mSelectionEnd);

        final Layout layout = builder().setText(state.mText.toString()).setPaint(paint).build();

        final int newOffset = layout.getOffsetToRightOf(state.mSelectionStart);

        state.mSelectionStart = state.mSelectionEnd = newOffset;

    }



    private void moveCursorToLeftCursorableOffset(EditorState state, TextPaint paint) {

        assertEquals("The editor has selection", state.mSelectionStart, state.mSelectionEnd);

        final Layout layout = builder().setText(state.mText.toString()).setPaint(paint).build();

        final int newOffset = layout.getOffsetToLeftOf(state.mSelectionStart);

        state.mSelectionStart = state.mSelectionEnd = newOffset;

    }



    /**

     * Tests for keycap, variation selectors, flags are in CTS.

     * See {@link android.text.cts.StaticLayoutTest}.

     */

    public void testEmojiOffset() {

        EditorState state = new EditorState();

        TextPaint paint = new TextPaint();



        // Odd numbered regional indicator symbols.

        // U+1F1E6 is REGIONAL INDICATOR SYMBOL LETTER A, U+1F1E8 is REGIONAL INDICATOR SYMBOL

        // LETTER C.

        state.setByString("| U+1F1E6 U+1F1E8 U+1F1E6 U+1F1E8 U+1F1E6");

        moveCursorToRightCursorableOffset(state, paint);

        state.setByString("U+1F1E6 U+1F1E8 | U+1F1E6 U+1F1E8 U+1F1E6");

        moveCursorToRightCursorableOffset(state, paint);

        state.setByString("U+1F1E6 U+1F1E8 U+1F1E6 U+1F1E8 | U+1F1E6");

        moveCursorToRightCursorableOffset(state, paint);

        state.setByString("U+1F1E6 U+1F1E8 U+1F1E6 U+1F1E8 U+1F1E6 |");

        moveCursorToRightCursorableOffset(state, paint);

        state.setByString("U+1F1E6 U+1F1E8 U+1F1E6 U+1F1E8 U+1F1E6 |");

        moveCursorToLeftCursorableOffset(state, paint);

        state.setByString("U+1F1E6 U+1F1E8 U+1F1E6 U+1F1E8 | U+1F1E6");

        moveCursorToLeftCursorableOffset(state, paint);

        state.setByString("U+1F1E6 U+1F1E8 | U+1F1E6 U+1F1E8 U+1F1E6");

        moveCursorToLeftCursorableOffset(state, paint);

        state.setByString("| U+1F1E6 U+1F1E8 U+1F1E6 U+1F1E8 U+1F1E6");

        moveCursorToLeftCursorableOffset(state, paint);

        state.setByString("| U+1F1E6 U+1F1E8 U+1F1E6 U+1F1E8 U+1F1E6");

        moveCursorToLeftCursorableOffset(state, paint);



        // Zero width sequence

        final String zwjSequence = "U+1F468 U+200D U+2764 U+FE0F U+200D U+1F468";

        state.setByString("| " + zwjSequence + " " + zwjSequence + " " + zwjSequence);

        moveCursorToRightCursorableOffset(state, paint);

        state.assertEquals(zwjSequence + " | " + zwjSequence + " " + zwjSequence);

        moveCursorToRightCursorableOffset(state, paint);

        state.assertEquals(zwjSequence + " " + zwjSequence + " | " + zwjSequence);

        moveCursorToRightCursorableOffset(state, paint);

        state.assertEquals(zwjSequence + " " + zwjSequence + " " + zwjSequence + " |");

        moveCursorToRightCursorableOffset(state, paint);

        state.assertEquals(zwjSequence + " " + zwjSequence + " " + zwjSequence + " |");

        moveCursorToLeftCursorableOffset(state, paint);

        state.assertEquals(zwjSequence + " " + zwjSequence + " | " + zwjSequence);

        moveCursorToLeftCursorableOffset(state, paint);

        state.assertEquals(zwjSequence + " | " + zwjSequence + " " + zwjSequence);

        moveCursorToLeftCursorableOffset(state, paint);

        state.assertEquals("| " + zwjSequence + " " + zwjSequence + " " + zwjSequence);

        moveCursorToLeftCursorableOffset(state, paint);

        state.assertEquals("| " + zwjSequence + " " + zwjSequence + " " + zwjSequence);

        moveCursorToLeftCursorableOffset(state, paint);



        // Emoji modifiers

        // U+261D is WHITE UP POINTING INDEX, U+1F3FB is EMOJI MODIFIER FITZPATRICK TYPE-1-2.

        state.setByString("| U+261D U+1F3FB U+261D U+1F3FB U+261D U+1F3FB");

        moveCursorToRightCursorableOffset(state, paint);

        state.setByString("U+261D U+1F3FB | U+261D U+1F3FB U+261D U+1F3FB");

        moveCursorToRightCursorableOffset(state, paint);

        state.setByString("U+261D U+1F3FB U+261D U+1F3FB | U+261D U+1F3FB");

        moveCursorToRightCursorableOffset(state, paint);

        state.setByString("U+261D U+1F3FB U+261D U+1F3FB U+261D U+1F3FB |");

        moveCursorToRightCursorableOffset(state, paint);

        state.setByString("U+261D U+1F3FB U+261D U+1F3FB U+261D U+1F3FB |");

        moveCursorToLeftCursorableOffset(state, paint);

        state.setByString("U+261D U+1F3FB U+261D U+1F3FB | U+261D U+1F3FB");

        moveCursorToLeftCursorableOffset(state, paint);

        state.setByString("U+261D U+1F3FB | U+261D U+1F3FB U+261D U+1F3FB");

        moveCursorToLeftCursorableOffset(state, paint);

        state.setByString("| U+261D U+1F3FB U+261D U+1F3FB U+261D U+1F3FB");

        moveCursorToLeftCursorableOffset(state, paint);

        state.setByString("| U+261D U+1F3FB U+261D U+1F3FB U+261D U+1F3FB");

        moveCursorToLeftCursorableOffset(state, paint);

    }

}