Initial commit

app/src/test/java/com/termux/terminal/WcWidthTest.java

@@ -0,0 +1,62 @@
+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);
+	}
+
+	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);
+	}
+
+}