QUnit.stack( [offset ] )Returns: String
Description: Returns a single line string representing the stacktrace (call stack)
This method returns a single line string representing the stacktrace from where it was called. According to its offset argument,
QUnit.stack() will return the correspondent line from the call stack.
The default offset is 0 and will return the current location where it was called.
Not all browsers support retrieving stracktraces. In those,
QUnit.stack() will return
The stacktrace line can be used on custom assertions and reporters. The following example logs the line of each passing assertion.