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 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, 0x2060);
	}

	public void testWatch() {
		assertWidthIs(1, 0x231a);
	}

	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(2, 0x11A3);
	}

}