Focus the text field in the frame
Main document.hasFocus() should be true : PASS
Sub-frame document.hasFocus() should be true : PASS

Focus the text field in the main document
Main document.hasFocus() should be true : PASS
Sub-frame document.hasFocus() should be false : PASS

Blur the window
Main document.hasFocus() should be false : PASS
Sub-frame document.hasFocus() should be false : PASS

Focus the window again
Main document.hasFocus() should be true : PASS
Sub-frame document.hasFocus() should be false : PASS