termux-app/app/src/test/java/com/termux/terminal/ControlSequenceIntroducerTest.java

package com.termux.terminal;

/** "\033[" is the Control Sequence Introducer char sequence (CSI). */
public class ControlSequenceIntroducerTest extends TerminalTestCase {

	/** CSI Ps P Scroll down Ps lines (default = 1) (SD). */
	public void testCsiT() {
		withTerminalSized(4, 6).enterString("1\r\n2\r\n3\r\nhi\033[2Tyo\r\nA\r\nB").assertLinesAre("    ", "    ", "1   ", "2 yo", "A   ",
				"Bi  ");
		// Default value (1):
		withTerminalSized(4, 6).enterString("1\r\n2\r\n3\r\nhi\033[Tyo\r\nA\r\nB").assertLinesAre("    ", "1   ", "2   ", "3 yo", "Ai  ",
				"B   ");
	}

	/** CSI Ps S Scroll up Ps lines (default = 1) (SU). */
	public void testCsiS() {
		// The behaviour here is a bit inconsistent between terminals - this is how the OS X Terminal.app does it:
		withTerminalSized(3, 4).enterString("1\r\n2\r\n3\r\nhi\033[2Sy").assertLinesAre("3  ", "hi ", "   ", "  y");
		// Default value (1):
		withTerminalSized(3, 4).enterString("1\r\n2\r\n3\r\nhi\033[Sy").assertLinesAre("2  ", "3  ", "hi ", "  y");
	}

}