mirror of https://github.com/termux/termux-app
86 lines
2.3 KiB
Java
86 lines
2.3 KiB
Java
package com.termux.terminal;
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import junit.framework.TestCase;
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public class WcWidthTest extends TestCase {
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private static void assertWidthIs(int expectedWidth, int codePoint) {
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int wcWidth = WcWidth.width(codePoint);
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assertEquals(expectedWidth, wcWidth);
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}
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public void testPrintableAscii() {
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for (int i = 0x20; i <= 0x7E; i++) {
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assertWidthIs(1, i);
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}
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}
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public void testSomeWidthOne() {
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assertWidthIs(1, 'å');
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assertWidthIs(1, 'ä');
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assertWidthIs(1, 'ö');
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assertWidthIs(1, 0x23F2);
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}
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public void testSomeWide() {
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assertWidthIs(2, 'Ａ');
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assertWidthIs(2, 'Ｂ');
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assertWidthIs(2, 'Ｃ');
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assertWidthIs(2, '中');
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assertWidthIs(2, '文');
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assertWidthIs(2, 0x679C);
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assertWidthIs(2, 0x679D);
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assertWidthIs(2, 0x2070E);
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assertWidthIs(2, 0x20731);
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assertWidthIs(1, 0x1F781);
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}
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public void testSomeNonWide() {
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assertWidthIs(1, 0x1D11E);
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assertWidthIs(1, 0x1D11F);
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}
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public void testCombining() {
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assertWidthIs(0, 0x0302);
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assertWidthIs(0, 0x0308);
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assertWidthIs(0, 0xFE0F);
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}
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public void testWordJoiner() {
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// https://en.wikipedia.org/wiki/Word_joiner
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// The word joiner (WJ) is a code point in Unicode used to separate words when using scripts
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// that do not use explicit spacing. It is encoded since Unicode version 3.2
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// (released in 2002) as U+2060 WORD JOINER (HTML ⁠).
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// The word joiner does not produce any space, and prohibits a line break at its position.
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assertWidthIs(0, 0x2060);
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}
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public void testWatch() {
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}
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public void testSofthyphen() {
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// http://osdir.com/ml/internationalization.linux/2003-05/msg00006.html:
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// "Existing implementation practice in terminals is that the SOFT HYPHEN is
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// a spacing graphical character, and the purpose of my wcwidth() was to
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// predict the advancement of the cursor position after a string is sent to
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// a terminal. Hence, I have no choice but to keep wcwidth(SOFT HYPHEN) = 1.
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// VT100-style terminals do not hyphenate."
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assertWidthIs(1, 0x00AD);
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}
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public void testHangul() {
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assertWidthIs(1, 0x11A3);
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}
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public void testEmojis() {
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assertWidthIs(2, 0x1F428); // KOALA.
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assertWidthIs(2, 0x231a); // WATCH.
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assertWidthIs(2, 0x1F643); // UPSIDE-DOWN FACE (Unicode 8).
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}
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}
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