CIS 764 Database Systems Engineering

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CIS 764 Database Systems Engineering
L21 Status Project Reviews
Testing
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CIS 764 Database Systems Engineering
Topics08 file posted.
Contact me if you have not selected
topic for step-by-step tutorial
topic for short paper
which item to present to the
class date for
presentation (or if your
selection was not recorded ) .


Fall 2008
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CIS 764 Database Systems Engineering
Previous Thursday visits with each group
for
review of design documents
Observations (review of
previous lectures) lecture
/ one-on-one discussion
words / hands on learning


Fall 2008
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CIS 764 Database Systems Engineering
Requirements analysis (elicitation)
not all groups interpret the problem domain
the same as the client ( in this case, the
instructor). need face-to-face dialog
using some early, client-level models. ??
Select individual images ?? Client or photo
define an order ?? Order album ??
Client isa ?? Person, magazine publisher

Fall 2008
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CIS 764 Database Systems Engineering

• Focus on key aspects
• extreme programming start with minimal,
  but essential system
• extreme design
• e.g. Ignore add user,
• delete user,
  
• add profile,
• edit anything
• rather, build some sample customers
  photographers
• into the data base.
• do allow login operation in
  prototype

Fall 2008
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CIS 764 Database Systems Engineering
Use case model diagram supporting
words about 5 key operations
some add or create object
some business operation that completes/connects
objects operations should be verbs,
may be compound names add_photo (in
the implementation, this becomes
PhotoCollection.add( )

Fall 2008
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CIS 764 Database Systems Engineering
UC identifies operations, but not flow or
sequencing data flow model
http//en.wikipedia.org/wiki/Data_Flow_Dia
gram UML collaboration diagram
process model
http//en.wikipedia.org/wiki/Business_process_mode
ling UML swim lane model
later include one of these in the model
documents.
Fall 2008
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CIS 764 Database Systems Engineering



Class models variations names no
attributes name
attributes ( keys)
nameattributes methods
nameattribuatesmethodsparamters
add session/façade/ controllers In
visual model a role label will become a code
instance variable (not necessary to show the
attribute)
Fall 2008
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CIS 764 Database Systems Engineering



Class models ltgt vs ltltgtgt multiple
paths of same ltgt or ltltgtgt needs invariant
assertions
Fall 2008
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CIS 764 Database Systems Engineering



Class models name
attributes ( keys) representation of state
status enumeration e.g. Status
pending , confirmed, fulfilled, cancelled,
design issue .. Not constraint on
implementation CIS771 Verification
finite state model checking
Fall 2008
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CIS 764 Database Systems Engineering


Representation for image metadata
thumb and/or web image hi-res_image
blob or image type
(not included in the image table)

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CIS 764 Database Systems Engineering


GUI models some screen sketches (or
snapshots) (later) page flow model
(equivalent to a state model) (show
names of pages/state and transition
events and conditions)
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CIS 764 Database Systems Engineering


Sequence models start with human actor
(not a model class) connects with GUI
layer connects with controller / façade /
session get/create/find method .
finally check that the seq methods match the
class model!!!

Fall 2008
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CIS 764 Database Systems Engineering


Planning for implementation a prototype
even less proof of concept only a
few operations few adds, some key business op
may mock up some operations. for
photos how web page upload / download a file


Fall 2008
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CIS 764 Database Systems Engineering


Testing class project has minimal
requirement do some tests and report the
list of what tests, both positive (add
item, do operation) negative
(bad input, wrong sequencing)

Fall 2008
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CIS 764 Database Systems Engineering
Testing for real MSE project (and for
tutorial / paper topics) functional
tests unit tests,
regression tests repeats tests after changes
e.g. Junit http//www.junit.org/
GUI testing e.g.
Squish http//www.froglogic.com/
performance tests loading of
number of web ops e.g. Jmeter
http//jakarta.apache.org/jmeter/
http//en.wikipedia.org/wiki/JU
nit database size tests
e.g. DTM Test data generator
http//www.sqledit.com/dg/



Fall 2008
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CIS 764 Database Systems Engineering
Plan for upto 3 group design reviews 1.
overview domain level class , UC, GUI 2.
methods and seq models 3. process,
assertions Thursday schedule??



Fall 2008
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