Tests that the execution context is changed to match new selected node.
Running: initialize
Execution Context: main
matches: true
Running: selectIframeInnerNode
Execution Context: iframe
matches: true
Running: selectMainFrameNode
Execution Context: main
matches: true
Running: selectIframeNode
Execution Context: main
matches: true
Running: selectIframeContentDocument
Execution Context: iframe
matches: true