| <!DOCTYPE html> |
| <html> |
| <body> |
| |
| <script> |
| |
| function testGetColumnCount() { |
| var g = cr.ui.Grid.prototype; |
| g.measured_ = { |
| height: 8, |
| marginTop: 0, |
| marginBottom: 0, |
| width: 10, |
| marginLeft: 0, |
| marginRight: 0 |
| }; |
| var columns = g.getColumnCount_(); |
| g.measured_.width = 0; |
| columns = g.getColumnCount_(); |
| // Item width equals 0. |
| assertEquals(0, columns); |
| |
| g.measured_.width = 10; |
| columns = g.getColumnCount_(); |
| // No item in the list. |
| assertEquals(0, columns); |
| |
| g.dataModel_ = new cr.ui.ArrayDataModel([0, 1, 2]); |
| g.horizontalPadding_ = 0; |
| g.clientWidthWithoutScrollbar_ = 8; |
| columns = g.getColumnCount_(); |
| // Client width is smaller than item width. |
| assertEquals(0, columns); |
| |
| g.clientWidthWithoutScrollbar_ = 20; |
| // Client height can fit two rows. |
| g.clientHeight_ = 16; |
| columns = g.getColumnCount_(); |
| assertEquals(2, columns); |
| |
| // Client height can not fit two rows. A scroll bar is needed. |
| g.clientHeight_ = 15; |
| g.clientWidthWithScrollbar_ = 18; |
| columns = g.getColumnCount_(); |
| // Can not fit two columns due to the scroll bar. |
| assertEquals(1, columns); |
| |
| g.clientHeight_ = 16; |
| g.measured_.marginTop = 1; |
| columns = g.getColumnCount_(); |
| // Can fit two columns due to uncollapse margin. |
| assertEquals(2, columns); |
| |
| g.measured_.marginBottom = 1; |
| columns = g.getColumnCount_(); |
| // Can not fit two columns due to margin. |
| assertEquals(1, columns); |
| |
| g.measured_.marginTop = 0; |
| g.measured_.marginBottom = 0; |
| g.measured_.marginLeft = 1; |
| columns = g.getColumnCount_(); |
| // Can fit two columns due to uncollapse margin. |
| assertEquals(2, columns); |
| |
| g.measured_.marginRight = 1; |
| columns = g.getColumnCount_(); |
| // Can not fit two columns due to margin on left and right side. |
| assertEquals(1, columns); |
| |
| g.measured_.marginRight = 0; |
| g.horizontalPadding_ = 2; |
| g.clientWidthWithoutScrollbar_ = 22; |
| columns = g.getColumnCount_(); |
| // Can fit two columns as (22-2=)20px width is avaiable for grid items. |
| assertEquals(2, columns); |
| |
| g.horizontalPadding_ = 3; |
| columns = g.getColumnCount_(); |
| // Can not fit two columns due to bigger horizontal padding. |
| assertEquals(1, columns); |
| } |
| |
| </script> |
| |
| </body> |
| </html> |
