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Tests for TextPainter.minIntrinsicWidth (#13515)

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Ian Hickson 2017-12-12 10:58:17 -08:00 committed by GitHub
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packages/flutter/test/painting/text_painter_test.dart
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@ -93,4 +93,90 @@ void main() {
expect(painter.preferredLineHeight, 100.0);
expect(painter.size, const Size(100.0, 100.0));
});
test('TextPainter intrinsic dimensions', () {
const TextStyle style = const TextStyle(
inherit: false,
fontFamily: 'Ahem',
fontSize: 10.0,
);
TextPainter painter;
painter = new TextPainter(
text: const TextSpan(
text: 'X X X',
style: style,
),
textDirection: TextDirection.ltr,
);
painter.layout();
expect(painter.size, const Size(50.0, 10.0));
expect(painter.minIntrinsicWidth, 10.0);
expect(painter.maxIntrinsicWidth, 50.0);
painter = new TextPainter(
text: const TextSpan(
text: 'X X X',
style: style,
),
textDirection: TextDirection.ltr,
ellipsis: 'e',
);
painter.layout();
expect(painter.size, const Size(50.0, 10.0));
expect(painter.minIntrinsicWidth, 50.0);
expect(painter.maxIntrinsicWidth, 50.0);
painter = new TextPainter(
text: const TextSpan(
text: 'X X XXXX',
style: style,
),
textDirection: TextDirection.ltr,
maxLines: 2,
);
painter.layout();
expect(painter.size, const Size(80.0, 10.0));
expect(painter.minIntrinsicWidth, 40.0);
expect(painter.maxIntrinsicWidth, 80.0);
painter = new TextPainter(
text: const TextSpan(
text: 'X X XXXX XX',
style: style,
),
textDirection: TextDirection.ltr,
maxLines: 2,
);
painter.layout();
expect(painter.size, const Size(110.0, 10.0));
expect(painter.minIntrinsicWidth, 70.0);
expect(painter.maxIntrinsicWidth, 110.0);
painter = new TextPainter(
text: const TextSpan(
text: 'XXXXXXXX XXXX XX X',
style: style,
),
textDirection: TextDirection.ltr,
maxLines: 2,
);
painter.layout();
expect(painter.size, const Size(180.0, 10.0));
expect(painter.minIntrinsicWidth, 90.0);
expect(painter.maxIntrinsicWidth, 180.0);
painter = new TextPainter(
text: const TextSpan(
text: 'X XX XXXX XXXXXXXX',
style: style,
),
textDirection: TextDirection.ltr,
maxLines: 2,
);
painter.layout();
expect(painter.size, const Size(180.0, 10.0));
expect(painter.minIntrinsicWidth, 90.0);
expect(painter.maxIntrinsicWidth, 180.0);
}, skip: true); // https://github.com/flutter/flutter/issues/13512
}