test('TextPainter line metrics', () {
    final TextPainter painter = TextPainter()
      ..textDirection = TextDirection.ltr;

    const String text = 'test1\nhello line two really long for soft break\nfinal line 4';
    painter.text = const TextSpan(
      text: text,
    );

    painter.layout(maxWidth: 300);

    expect(painter.text, const TextSpan(text: text));
    expect(painter.preferredLineHeight, 14);

    final List<ui.LineMetrics> lines = painter.computeLineMetrics();

    expect(lines.length, 4);

    expect(lines[0].hardBreak, true);
    expect(lines[1].hardBreak, false);
    expect(lines[2].hardBreak, true);
    expect(lines[3].hardBreak, true);

    expect(lines[0].ascent, 11.199999809265137);
    expect(lines[1].ascent, 11.199999809265137);
    expect(lines[2].ascent, 11.199999809265137);
    expect(lines[3].ascent, 11.199999809265137);

    expect(lines[0].descent, 2.799999952316284);
    expect(lines[1].descent, 2.799999952316284);
    expect(lines[2].descent, 2.799999952316284);
    expect(lines[3].descent, 2.799999952316284);

    expect(lines[0].unscaledAscent, 11.199999809265137);
    expect(lines[1].unscaledAscent, 11.199999809265137);
    expect(lines[2].unscaledAscent, 11.199999809265137);
    expect(lines[3].unscaledAscent, 11.199999809265137);

    expect(lines[0].baseline, 11.200000047683716);
    expect(lines[1].baseline, 25.200000047683716);
    expect(lines[2].baseline, 39.200000047683716);
    expect(lines[3].baseline, 53.200000047683716);

    expect(lines[0].height, 14);
    expect(lines[1].height, 14);
    expect(lines[2].height, 14);
    expect(lines[3].height, 14);

    expect(lines[0].width, 70);
    expect(lines[1].width, 294);
    expect(lines[2].width, 266);
    expect(lines[3].width, 168);

    expect(lines[0].left, 0);
    expect(lines[1].left, 0);
    expect(lines[2].left, 0);
    expect(lines[3].left, 0);

    expect(lines[0].lineNumber, 0);
    expect(lines[1].lineNumber, 1);
    expect(lines[2].lineNumber, 2);
    expect(lines[3].lineNumber, 3);
  });