Bug 326177 EPartService's getActivePart() does not appear to work properly for an application with multiple windows
Based on the code in PartServiceCreationFunction, the EPartService implementation being returned when an application's context is queried seems to be a window-level EPartService implementation.
tests/org.eclipse.e4.ui.tests/src/org/eclipse/e4/ui/tests/application/EPartServiceTest.java
return prompt;
					}
					public Save promptToSave(MPart saveablePart) {
						return null;
					}
				});
		EPartService partService = (EPartService) window.getContext().get(
				EPartService.class.getName());
		assertEquals(success, partService.saveAll(confirm));
		assertEquals(afterDirty[0], saveablePart.isDirty());
		assertEquals(saveCalled[0], editor.wasSaveCalled());
		assertEquals(afterDirty[1], saveablePart2.isDirty());
		assertEquals(saveCalled[1], editor2.wasSaveCalled());
	}
	private boolean hasCancel(Save[] returnValues, boolean[] beforeDirty) {
		for (int i = 0; i < returnValues.length; i++) {
			if (returnValues[i] == Save.CANCEL && beforeDirty[i]) {
				return true;
			}
		}
		return false;
	}
	private boolean isSuccessful(Save[] returnValues, boolean confirm,
			boolean[] beforeDirty, boolean[] throwException) {
		if (confirm) {
			if (returnValues[0] == Save.YES) {
				if (returnValues[1] == Save.YES) {
					if (beforeDirty[0]) {
						if (beforeDirty[1]) {
							return !throwException[0] && !throwException[1];