content: package com.termux.terminal;
  
  import junit.framework.TestCase;
  
  public class WcWidthTest extends TestCase {
  
  	private static void assertWidthIs(int expectedWidth, int codePoint) {
  		int wcWidth = WcWidth.width(codePoint);
  		assertEquals(expectedWidth, wcWidth);
  	}
  
  	public void testPrintableAscii() {
  		for (int i = 0x20; i <= 0x7E; i++) {
  			assertWidthIs(1, i);
  		}
  	}
  
  	public void testSomeWidthOne() {
  		assertWidthIs(1, 'å');
  		assertWidthIs(1, 'ä');
  		assertWidthIs(1, 'ö');
  		assertWidthIs(1, 0x23F2);
  	}
  
  	public void testSomeWide() {
  		assertWidthIs(2, 'Ａ');
  		assertWidthIs(2, 'Ｂ');
  		assertWidthIs(2, 'Ｃ');
  		assertWidthIs(2, '中');
  		assertWidthIs(2, '文');
  
  		assertWidthIs(2, 0x679C);
  		assertWidthIs(2, 0x679D);
  
  		assertWidthIs(2, 0x2070E);
  		assertWidthIs(2, 0x20731);
  
  		assertWidthIs(1, 0x1F781);
  	}
  
  	public void testSomeNonWide() {
  		assertWidthIs(1, 0x1D11E);
  		assertWidthIs(1, 0x1D11F);
  	}
  
  	public void testCombining() {
  		assertWidthIs(0, 0x0302);
  		assertWidthIs(0, 0x0308);
  		assertWidthIs(0, 0xFE0F);
  	}
  
  	public void testWordJoiner() {
  		// https://en.wikipedia.org/wiki/Word_joiner
  		// The word joiner (WJ) is a code point in Unicode used to separate words when using scripts
  		// that do not use explicit spacing. It is encoded since Unicode version 3.2
  		// (released in 2002) as U+2060 WORD JOINER (HTML &#8288;).
  		// The word joiner does not produce any space, and prohibits a line break at its position.
  		assertWidthIs(0, 0x2060);
  	}
  
  	public void testSofthyphen() {
  		// http://osdir.com/ml/internationalization.linux/2003-05/msg00006.html:
  		// "Existing implementation practice in terminals is that the SOFT HYPHEN is
  		// a spacing graphical character, and the purpose of my wcwidth() was to
  		// predict the advancement of the cursor position after a string is sent to
  		// a terminal. Hence, I have no choice but to keep wcwidth(SOFT HYPHEN) = 1.
  		// VT100-style terminals do not hyphenate."
  		assertWidthIs(1, 0x00AD);
  	}
  
  	public void testHangul() {
  		assertWidthIs(1, 0x11A3);
  	}
  
  	public void testEmojis() {
  		assertWidthIs(2, 0x1F428); // KOALA.
  		assertWidthIs(2, 0x231a);  // WATCH.
  		assertWidthIs(2, 0x1F643); // UPSIDE-DOWN FACE (Unicode 8).
  	}
  
  }
  