THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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Limitations
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of
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recorded
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JMeter
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tests
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The
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main
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challenge
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when
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creating
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a
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Jmeter
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script
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for
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a
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Wicket
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application
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is
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that
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the
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links
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are
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dynamic.
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Of
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course,
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this
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is
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a
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very
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good
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thing
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from
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a
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security
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point
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of
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view.
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It
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is
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possible
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to
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record
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a
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test
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using
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JMeter
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(
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...
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)
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but
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when
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running
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a
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recorded
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test
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against
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a
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Wicket
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application
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you
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have
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to
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be
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careful
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about
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recording
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and
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playing
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back
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tests
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so
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that
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that
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the
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test
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begins
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with
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a
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freshly
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created
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session.
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This
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is
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required
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to
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ensure
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that
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the
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number
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that
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appears
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in
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the
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"wicket:interface"
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parameter
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in
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the
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URL
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starts
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from
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1.
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Recorded
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tests
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are
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therefore
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brittle
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and
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will
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break
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if
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you
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add
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a
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new
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link
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somewhere
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or
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insert
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a
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step
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in
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the
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middle
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of
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the
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flow.
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It
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would
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not
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be
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possible
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to
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re-try
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running
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sections
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of
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your
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test
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while
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keeping
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your
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application
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runnning,
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which
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is
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desirable
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when
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developing
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a
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script.
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Recording
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can
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help
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a
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lot
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for
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e.g.
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to
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understand
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what
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exactly
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is
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being
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POST-ed
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when
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you
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have
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complex
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form
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submissions
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etc.
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but
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described
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below
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is
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an
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approach
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using
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JMeter
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regular
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expression
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support
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to
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arrive
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at
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stable
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and
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repeatable
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test
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scripts
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for
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Wicket
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applications.
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Regular
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Expressions
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based
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approach
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JMeter
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can
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parse
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HTML
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responses
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and
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extract
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pretty
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much
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anything
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you
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want
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using
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regular
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expressions.
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By
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the
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way,
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this
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is
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an
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interesting
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alternative
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to
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writing
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functional
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tests
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on
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web-applications
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-
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because
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you
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can
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assert
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for
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expected
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results
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this
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way.
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So
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the
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key
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to
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testing
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a
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Wicket
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application
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is
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to
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derive
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the
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URL
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that
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has
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to
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be
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used
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in
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the
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next
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step
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from
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the
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HTML
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response
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for
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the
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previous
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step.
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For
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example,
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consider
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a
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normal
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link
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of
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the
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form:
| No Format |
|---|
} <a href="#" wicket:id="create"> {noformat} |
The
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HTML
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generated
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at
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runtime
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will
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look
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something
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like
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this:
| No Format |
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} <a href="?wicket:interface=:4:create::ILinkListener:"> {noformat} |
The
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content
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of
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the
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"href"
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attribute
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can
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be
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grabbed
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using
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the
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following
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regex:
| No Format |
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} "([^"]+:create:[^"]+)" {noformat} |
Within
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JMeter,
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you
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can
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add
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a
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"Regular
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Expression
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Extractor"
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listener
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to
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any
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requested
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page
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in
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your
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test
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script
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like
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this.
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This
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is
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how
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the
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above
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regex
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will
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look
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like:
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The
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"$1$"
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refers
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to
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the
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content
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matched
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by
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the
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first
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regular
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expression
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that
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we
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have
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surrounded
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with
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brackets.
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Here
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there
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is
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only
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one
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bracketed
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expression.
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So
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we
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take
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the
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value
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that
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we
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get
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and
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put
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it
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into
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a
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variable
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called
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"nextUrl"
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Using
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this
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in
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the
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next
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step
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of
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the
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script
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is
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easy
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as
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shown
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below:
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Just
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append
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${nextUrl}
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to
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the
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base
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path
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of
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your
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Wicket
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app.
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That's
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it!
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If
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you
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have
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some
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deeply
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nested
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components
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you
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can
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easily
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use
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the
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resulting
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Wicket
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path,
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e.g.
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"table:row:5:link".
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The
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good
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thing
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is
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that
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this
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path
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normally
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does
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not
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change.
| No Format |
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} <form wicket:id="form"> {noformat} |
This
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is
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exactly
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the
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same
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as
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handling
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a
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link.
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The
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HTML
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generated
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at
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runtime
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will
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be
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something
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like
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this:
| No Format |
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} <form action="?wicket:interface=:5:form::IFormSubmitListener:" {noformat} |
And
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the
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regex
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required
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is:
| No Format |
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} "([^"]+:form:[^"]+)" {noformat} |
Using
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this
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is
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almost
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the
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same
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as
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a
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link
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but
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this
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time
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we
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set
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the
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request
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method
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to
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POST
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and
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we
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also
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provide
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the
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expected
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request
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parameters.
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There
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is
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one
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more
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corner
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case
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we
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need
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to
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consider.
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The
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wicket
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Link
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class
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allows
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you
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to
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nest
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an
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anchor
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tag
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within
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some
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other
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HTML
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tag
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for
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e.g.
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a
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TD
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tag.
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So
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if
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you
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have:
| No Format |
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} <td wicket:id="new"><a href="#">Click Me</a></td> {noformat} |
Runtime:
| No Format |
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{noformat} <td wicket:id="new" onclick="window.location.href='?wicket:interface=:4:header:new::ILinkListener:';return false;"> <a href="#">Click Me</a></td> {noformat} |
The
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formula
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for
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this
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is
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slightly
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different
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-
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single
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quotes
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instead
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of
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double
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quotes.
| No Format |
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}
'([^']+:new:[^']+)'
|
Complex Regex Matching Example
Sometimes you have a list of checkboxes and it may turn out that the "value" attribute being generated by Wicket is dynamic. I guess that a way to avoid having the "value" dynamic is to provide an IchoiceRenderer where the getIdValue() is predictable instead of being generated by Wicket.
Anyway, the problem is that you want to figure out the right value to submit as part of a form POST.
So if the generated HTML looks like this:
| No Format |
|---|
{noformat} h3. Complex Regex Matching Example Sometimes you have a list of checkboxes and it may turn out that the "value" attribute being generated by Wicket is dynamic. I guess that a way to avoid having the "value" dynamic is to provide an IchoiceRenderer where the getIdValue() is predictable instead of being generated by Wicket. Anyway, the problem is that you want to figure out the right value to submit as part of a form POST. So if the generated HTML looks like this: {noformat} <input value="radio43" type="radio" name="myradio" id="long_nested_path"/> <label for="long_nested_path">My Label</label> {noformat} |
You
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can
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get
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the
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value
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you
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are
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interested
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in
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corresponding
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to
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the
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string
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"My
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Label"
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in
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this
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case
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like
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this:
| No Format |
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} <input value="([^"]+)".*\n.*My Label {noformat} *Tip*: Paste the browser HTML source into some text editor that supports regex searches (like Textpad) and then some trial and error will narrow down the regex that fits your requirement. h3. Conclusion If you know the |
Tip: Paste the browser HTML source into some text editor that supports regex searches (like Textpad) and then some trial and error will narrow down the regex that fits your requirement.
Conclusion
If you know the "wicket:id"s,
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creating
...
repeatable
...
JMeter
...
tests
...
for
...
Wicket
...
apps
...
could
...
be
...
easier
...
than
...
creating
...
them
...
for
...
normal
...
web
...
applications!
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TODO
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:
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I
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have
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not
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yet
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tried
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to
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test
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any
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Ajax
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functionality
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with
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this
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approach.
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However
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I
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think
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that
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if
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you
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record
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a
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JMeter
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test
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involving
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Ajax
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requests
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and
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analyze
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the
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requests,
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you
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should
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be
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able
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to
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easily
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derive
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the
...
steps
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and
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regular
...
expressions
...
required.
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If
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you
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have
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any
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success
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with
...
this,
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please
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inform
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me
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or
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the
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Wicket
...
users
...
mailing
...
list
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or
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update
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this
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page.
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Thanks!
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