This is the test for basic functionality of heap snapshot view grid.
To use this test:

- load file in the browser;
- open DevTools (Ctrl+Shift+I on Win/Linux, Command+Option+I on Mac);
- go to 'Profiles' page;
- press 'Take heap snapshot' button (eye icon on the left side of status bar);

On the left pane under 'Heap snapshots' section, an item called 'Snapshot 1' must appear, and a grid with snapshot data must appear on the right. Now test the following functionality in the grid:

- change sorting order in each column by clicking on its header;
- resize each column;
- toggle between showing absolute times and percents (button with percent sign on the status bar);
- double-click on numbers in 'Count' and 'Size' columns to toggle between times and percents for this column only;
- expanding and collapsing tree nodes.