Create small test case to illustrate #828

[ptziegler]

This test should pass on Windows, but fail on Linux.
Because there, the client area matches the size of the shell, even though it should be smaller due to the decorations.

I've tested a variant where I replaced the calculation in getBoundsInPixel() with gdk_window_get_frame_extents. In principle, this works, though unreliably.

[github-actions]

Test Results

   539 files   -  6     539 suites   - 6   32m 35s ⏱️ + 1m 56s
 4 344 tests  - 36   4 327 ✅  - 35   15 💤  - 3  2 ❌ +2 
16 617 runs   - 33  16 476 ✅  - 33  138 💤  - 3  3 ❌ +3 

For more details on these failures, see this check.

Results for commit f87b558. ± Comparison against base commit 30797bd.

This pull request removes 37 and adds 1 tests. Note that renamed tests count towards both.

AllWin32Tests org.eclipse.swt.graphics.ImageWin32Tests ‑ testImageDataForDifferentFractionalZoomsShouldBeDifferent
AllWin32Tests org.eclipse.swt.graphics.ImageWin32Tests ‑ testImageShouldHaveDimesionAsPerZoomLevel
AllWin32Tests org.eclipse.swt.tests.win32.Test_org_eclipse_swt_dnd_DND ‑ testByteArrayTransfer
AllWin32Tests org.eclipse.swt.tests.win32.Test_org_eclipse_swt_dnd_DND ‑ testFileTransfer
AllWin32Tests org.eclipse.swt.tests.win32.Test_org_eclipse_swt_dnd_DND ‑ testHtmlTransfer
AllWin32Tests org.eclipse.swt.tests.win32.Test_org_eclipse_swt_dnd_DND ‑ testImageTransfer_fromCopiedImage
AllWin32Tests org.eclipse.swt.tests.win32.Test_org_eclipse_swt_dnd_DND ‑ testImageTransfer_fromImage
AllWin32Tests org.eclipse.swt.tests.win32.Test_org_eclipse_swt_dnd_DND ‑ testImageTransfer_fromImageData
AllWin32Tests org.eclipse.swt.tests.win32.Test_org_eclipse_swt_dnd_DND ‑ testImageTransfer_fromImageDataFromImage
AllWin32Tests org.eclipse.swt.tests.win32.Test_org_eclipse_swt_dnd_DND ‑ testRtfTransfer
…

org.eclipse.swt.tests.junit.Test_org_eclipse_swt_widgets_Shell ‑ test_Issue828_CheckShellBounds

♻️ This comment has been updated with latest results.

[akurtakov]

As the issue has been closed I'm closing this PR too. Please reopen with details if I misunderstood.