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- We hope you find the
quadrants a useful model.

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We asked you in your exercise

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to make a list of the tests that you have.

4
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We've made a few so that we
can talk about them here.

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You may have found that most of your tests

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are in quadrant three,

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if you really tried to
categorize them and find them.

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Things like exploratory testing

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or user acceptance testing.

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Maybe even manual or ad hoc,

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demos to the customers.

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One of the questions we're often asked is,

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where does regression testing fit in?

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I define regression testing as

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what worked yesterday, still works today.

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And so regression
testing helps us do that.

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- Yeah it gives us that great safety net,

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so we can make changes and not
worry about breaking things.

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Most of our regression
tests that we think about

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are usually functional.

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And those are ideally an
outcome of quadrant one

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or quadrant two,

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that might include the unit test,

24
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because those are usually
functional tests as well.

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We'll talk more about these tests

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in the first two quadrants

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in lesson four, Automation and Agile.

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- And Lisa, sometimes we have
things like paper mock ups

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as a form of a Q2 test.

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- Right, right.

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Quadrants one and two are
all about preventing defects.

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So we concentrate there early
on in our development process

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for new features.

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We need quadrants three and four,

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but they're more about finding defects

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after the fact, right?

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We need the short feedback
loops for quicker, easier fixes.

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Spending less time fixing problems

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makes it less expensive.

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- That's so true.

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- If you're doing manual
regression testing

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after coding is done,
which a lot of people are,

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even if you have some automation,

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there's often a lot of
manual regression testing

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before release.

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- Especially new teams that
are just moving to Agile.

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- Right, right.

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So that would fall into quadrant three.

49
00:02:03,514 --> 00:02:05,478
You may also have regression tests

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that fit into quadrant four,

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like performance or
security related tests.

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Or perhaps checking
your memory management.

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- That's something that
people forget quite often.

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Or even load testing.

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- Oh yeah.

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- Don't forget our load testing.

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- Very important.

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- So some of the quality
attributes down here,

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these are those ones that we need to test.

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Now one of the things that,

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if we go back to our
initial questions, which was

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where does regression testing fall?

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Is we will take, and I would say,

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oh, about,

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in the middle.

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Doing these manual checks,
maybe some exploratory testing,

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performance, maybe not memory management,

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because it might not be included,

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but all of these things
that you need to do

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to be part of your regression tests.

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So it doesn't fall in any one quadrant,

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but a combination of a lot of tests.

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- But the quadrants still help us remember

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to do all those things as
part of our regression tests.

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- That is so true.

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It makes them visible.

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So we hope that you do this exercise

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with your team.

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- There are lots of teams that

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may not have so many tests
down here in quadrant four,

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00:03:24,159 --> 00:03:25,620
because just a lack of understanding

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or they run out of time.

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We're gonna look at some
of those quality attributes

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that fall into these quadrants.