Contents

= TracePoint 

To demonstrate TracePoint, we will simply have it feed all
event parameters into the log for a simple String call.

First we need to load the `tracepoint.rb` library.

  require 'tracepoint'

Now we can setup the trace procedure.

  trace_log = []

  TracePoint.trace do |tp|
    trace_log << [tp.self.class, tp.callee, tp.event, tp.return?, tp.back == tp.bind]
  end

And then we can activate the trace, call our String method,
and deactivate the trace.

  TracePoint.activate
  "  a  ".strip
  TracePoint.deactivate

We should now see in the log the set of events required to
perform the addition operation.

  trace_log.assert.include? [String, :strip, 'c-call',   false, false]
  trace_log.assert.include? [String, :strip, 'c-return', false, false]

For reference, the other trace_log elements simply refer to the
QED run context.

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
tracepoint-1.2.1	spec/trace.rdoc