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• Installation testing
• Compatibility testing
• Smoke and sanity testing
• Regression testing
• Acceptance testing
• Alpha testing
• Beta testing
• Functional vs non-functional testing
• Destructive testing
• Software performance testing
• Usability testing
• Accessibility testing
• Security testing
• Internationalization and localization
• Development testing
• A/B testing
• Concurrent testing
• Conformance testing or type testing
Testing is a complicated beast. But it can also be fun
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The starting point for
improvement is to recognize the
need.
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Focus on lower costs often
leads to lower quality. Focus on
higher quality always leads to
lower costs.
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A relatively small number of
causes will typically produce a
large majority of the problems or
defects.
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Always code as if the guy who
ends up maintaining your code
will be a violent psychopath who
knows where you live.
Martin Golding
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A program which does not work
is undoubtedly wrong, but a
program which does work is not
necessarily right.
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Programming is like sex: a
single mistake leads to
providing support for a lifetime.
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All code is guilty, until proven
innocent.
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If debugging is the process of
removing bugs, then
programming must be the
process of putting them in.
Edsger Dijkstra
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Software and cathedrals are
much the same: first we build
them, then we pray.
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Absence of evidence is not
evidence of absence.
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Debugging is twice as hard as
writing the code in the first place.
Therefore, if you write the code as
cleverly as possible, you are, by
definition, not smart enough to
debug it.
Brian W. Kernighan
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Everything human is at least a
little bit broken.
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Testing is organised skepticism.
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Trying to improve software
quality by increasing the amount
of testing is like trying to lose
weight by weighing yourself
more often.
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3 Biggest Software Lies:
•The program’s fully tested and
bug-free
•We’re working on the
documentation
•Of course we can modify it
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Quality means to also do things
right when no one is looking.
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Where is the ‘any’ key?”
(Homer Simpson, trying to figure
out the “Press any key”
notification)
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Quality represents the wise
choice of many alternatives.
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When debugging, novices insert
corrective code; experts remove
defective code.
Richard Pattis
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If you don’t like testing your
product, most likely your
customers won’t like to test it
either.
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Quality is remembered long after
the price is forgotten.
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Program testing can be a very
effective way to show the
presence of bugs, but is
hopelessly inadequate for
showing their absence.
Edsger Dijkstra
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Software testing is the art of
trying to increase confidence in
a product by pointing out
everything that is wrong with it.
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f u cn rd ths, u cn gt a gd jb n
sftwr tstng.
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If automation processes had
been flawless, they would have
been called "automagic".
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With good program architecture
debugging is a breeze,
because bugs will be where
they should be.
David May
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The bitterness of poor quality
remains long after the
sweetness of meeting the
schedule has been forgotten.
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Fundamentally you can’t do your
own QA, it’s a question of seeing
you own blind spots.
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Software testers do not make
software; they only make them
better.
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If you automate a mess, you get
an automated mess.
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The trouble with programmers
is that you can never tell what
a programmer is doing until it’s
too late.
Seymour Cray
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Fast, good, cheap: pick any
two.
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If you don’t care about quality,
you can meet any other
requirement.
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One of my most productive
days was throwing away 1000
lines of code.
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Measuring programming
progress by lines of code is
like measuring aircraft building
progress by weight.
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If you don’t care about quality,
you can meet any requirement.
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Bad programmers have all the
answers.
Good testers have all the
questions.
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Why do we never have time to
do it right, but always have time
to do it over?
Murphy’s Law
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Alpha is simply that you want
somebody to share your pain!