94 lines
2.7 KiB
Plaintext
94 lines
2.7 KiB
Plaintext
// This file is part of www.nand2tetris.org
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// and the book "The Elements of Computing Systems"
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// by Nisan and Schocken, MIT Press.
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// File name: projects/12/KeyboardTest/Main.jack
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/** Test program for the OS Keyboard class. */
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class Main {
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/** Gets input from the user and verifies its contents. */
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function void main() {
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var char c, key;
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var String s;
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var int i;
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var boolean ok;
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let ok = false;
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do Output.printString("keyPressed test:");
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do Output.println();
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while (~ok) {
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do Output.printString("Please press the 'Page Down' key");
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while (key = 0) {
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let key = Keyboard.keyPressed();
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}
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let c = key;
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while (~(key = 0)) {
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let key = Keyboard.keyPressed();
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}
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do Output.println();
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if (c = 137) {
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do Output.printString("ok");
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do Output.println();
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let ok = true;
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}
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}
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let ok = false;
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do Output.printString("readChar test:");
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do Output.println();
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do Output.printString("(Verify that the pressed character is echoed to the screen)");
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do Output.println();
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while (~ok) {
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do Output.printString("Please press the number '3': ");
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let c = Keyboard.readChar();
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do Output.println();
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if (c = 51) {
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do Output.printString("ok");
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do Output.println();
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let ok = true;
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}
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}
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let ok = false;
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do Output.printString("readLine test:");
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do Output.println();
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do Output.printString("(Verify echo and usage of 'backspace')");
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do Output.println();
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while (~ok) {
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let s = Keyboard.readLine("Please type 'JACK' and press enter: ");
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if (s.length() = 4) {
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if ((s.charAt(0) = 74) & (s.charAt(1) = 65) & (s.charAt(2) = 67) & (s.charAt(3) = 75)) {
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do Output.printString("ok");
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do Output.println();
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let ok = true;
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}
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}
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}
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let ok = false;
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do Output.printString("readInt test:");
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do Output.println();
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do Output.printString("(Verify echo and usage of 'backspace')");
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do Output.println();
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while (~ok) {
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let i = Keyboard.readInt("Please type '-32123' and press enter: ");
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if (i = (-32123)) {
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do Output.printString("ok");
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do Output.println();
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let ok = true;
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}
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}
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do Output.println();
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do Output.printString("Test completed successfully");
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return;
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}
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}
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