| 1 | using CascadeIDE.Views.SkiaKit; |
| 2 | using SkiaSharp; |
| 3 | using Xunit; |
| 4 | |
| 5 | namespace CascadeIDE.Tests; |
| 6 | |
| 7 | public sealed class SkiaPopupListScrollTests |
| 8 | { |
| 9 | [Fact] |
| 10 | public void EnsureSelectionVisible_scrolls_down_when_selection_below_viewport() |
| 11 | { |
| 12 | const int rows = 12; |
| 13 | var scroll = SkiaPopupList.EnsureSelectionVisible(0, 0, rows); |
| 14 | Assert.Equal(0, scroll); |
| 15 | |
| 16 | scroll = SkiaPopupList.EnsureSelectionVisible(8, scroll, rows); |
| 17 | Assert.Equal(3, scroll); |
| 18 | Assert.Equal(8, scroll + SkiaPopupList.ViewportRowCount(rows) - 1); |
| 19 | } |
| 20 | |
| 21 | [Fact] |
| 22 | public void EnsureSelectionVisible_scrolls_up_when_selection_above_viewport() |
| 23 | { |
| 24 | const int rows = 12; |
| 25 | var scroll = SkiaPopupList.EnsureSelectionVisible(10, 0, rows); |
| 26 | Assert.Equal(5, scroll); |
| 27 | |
| 28 | scroll = SkiaPopupList.EnsureSelectionVisible(2, scroll, rows); |
| 29 | Assert.Equal(2, scroll); |
| 30 | } |
| 31 | |
| 32 | [Fact] |
| 33 | public void HitTestRow_respects_scroll_offset() |
| 34 | { |
| 35 | var bounds = new SKRect(0, 0, 200, SkiaPopupList.MeasureHeight(12)); |
| 36 | const int rows = 12; |
| 37 | const int scroll = 4; |
| 38 | |
| 39 | var firstVisible = SkiaPopupList.HitTestRow( |
| 40 | bounds, |
| 41 | 10, |
| 42 | bounds.Top + SkiaPopupList.HorizontalPadding + 2, |
| 43 | rows, |
| 44 | scroll); |
| 45 | Assert.Equal(4, firstVisible); |
| 46 | |
| 47 | var secondVisible = SkiaPopupList.HitTestRow( |
| 48 | bounds, |
| 49 | 10, |
| 50 | bounds.Top + SkiaPopupList.HorizontalPadding + SkiaPopupList.RowHeight + 2, |
| 51 | rows, |
| 52 | scroll); |
| 53 | Assert.Equal(5, secondVisible); |
| 54 | } |
| 55 | |
| 56 | [Fact] |
| 57 | public void MeasureHeight_caps_at_viewport() |
| 58 | { |
| 59 | Assert.Equal( |
| 60 | SkiaPopupList.ViewportRowCount(3) * SkiaPopupList.RowHeight + SkiaPopupList.HorizontalPadding * 2, |
| 61 | SkiaPopupList.MeasureHeight(3)); |
| 62 | Assert.Equal( |
| 63 | SkiaPopupList.ViewportRowCount(20) * SkiaPopupList.RowHeight + SkiaPopupList.HorizontalPadding * 2, |
| 64 | SkiaPopupList.MeasureHeight(20)); |
| 65 | } |
| 66 | |
| 67 | [Fact] |
| 68 | public void MeasureHeight_includes_hierarchy_header_when_requested() |
| 69 | { |
| 70 | var without = SkiaPopupList.MeasureHeight(2, showHierarchyHeader: false); |
| 71 | var withHeader = SkiaPopupList.MeasureHeight(2, showHierarchyHeader: true); |
| 72 | Assert.Equal(without + SkiaPopupList.HierarchyHeaderHeight, withHeader); |
| 73 | } |
| 74 | } |
| 75 | |