xterm.dart/test/src/core/buffer/buffer_test.dart

import 'package:test/test.dart';
import 'package:xterm/xterm.dart';

void main() {
  group('Buffer.getText()', () {
    test('should return the text', () {
      final terminal = Terminal();
      terminal.write('Hello World');
      expect(terminal.buffer.getText(), startsWith('Hello World'));
    });

    test('can handle line wrap', () {
      final terminal = Terminal();
      terminal.resize(10, 10);

      final line1 = 'This is a long line that should wrap';
      final line2 = 'This is a short line';
      final line3 = 'This is a long long long long line that should wrap';
      final line4 = 'Short';

      terminal.write('$line1\r\n');
      terminal.write('$line2\r\n');
      terminal.write('$line3\r\n');
      terminal.write('$line4\r\n');

      final lines = terminal.buffer.getText().split('\n');
      expect(lines[0], line1);
      expect(lines[1], line2);
      expect(lines[2], line3);
      expect(lines[3], line4);
    });

    test('can handle negative start', () {
      final terminal = Terminal();

      terminal.write('Hello World');

      expect(
        terminal.buffer.getText(
          BufferRangeLine(CellOffset(-100, -100), CellOffset(100, 100)),
        ),
        startsWith('Hello World'),
      );
    });

    test('can handle invalid end', () {
      final terminal = Terminal();

      terminal.write('Hello World');

      expect(
        terminal.buffer.getText(
          BufferRangeLine(CellOffset(0, 0), CellOffset(100, 100)),
        ),
        startsWith('Hello World'),
      );
    });

    test('can handle reversed range', () {
      final terminal = Terminal();

      terminal.write('Hello World');

      expect(
        terminal.buffer.getText(
          BufferRangeLine(CellOffset(5, 5), CellOffset(0, 0)),
        ),
        startsWith('Hello World'),
      );
    });

    test('can handle block range', () {
      final terminal = Terminal();

      terminal.write('Hello World\r\n');
      terminal.write('Nice to meet you\r\n');

      expect(
        terminal.buffer.getText(
          BufferRangeBlock(CellOffset(2, 0), CellOffset(5, 1)),
        ),
        startsWith('llo\nce '),
      );
    });
  });

  group('Buffer.resize()', () {
    test('should resize the buffer', () {
      final terminal = Terminal();
      terminal.resize(10, 10);

      expect(terminal.viewWidth, 10);
      expect(terminal.viewHeight, 10);

      for (var i = 0; i < terminal.lines.length; i++) {
        final line = terminal.lines[i];
        expect(line.length, 10);
      }

      terminal.resize(20, 20);

      expect(terminal.viewWidth, 20);
      expect(terminal.viewHeight, 20);

      for (var i = 0; i < terminal.lines.length; i++) {
        final line = terminal.lines[i];
        expect(line.length, 20);
      }
    });
  });
}