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User & Date: mrwellan on 2021-09-10 10:20:38
Other Links: branch diff | manifest | tags
Context
2021-09-10
11:41
Updates to debugging section of manual check-in: 43b9e9cf05 user: mrwellan tags: v1.65-debugging-update-orig
10:20
stuff check-in: 392f89b8e5 user: mrwellan tags: v1.65-debugging-update-orig
05:54
Merged couple changes made accidentally on trunk check-in: ee69c12599 user: matt tags: v1.65-debugging-update-orig
Changes
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//     GNU General Public License for more details.
// 
//     You should have received a copy of the GNU General Public License
//     along with Megatest.  If not, see <http://www.gnu.org/licenses/>.

Debugging
---------

Well Written Tests
~~~~~~~~~~~~~~~~~~

Test Design and Surfacing
^^^^^^^^^^^^^^^^^^^^^^^^^

Design your tests to surface errors. Ensure that all logs are processed by logpro and can be reached by a mouse click or two from the test control panel.



using the tool to make life easier

layers - less is often more


Clicks-to-error


A word on Bisecting
~~~~~~~~~~~~~~~~~~~

Bisecting is a debug strategy intended to speed up finding the root
cause.
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step" to only rerun the step or click on "restart from here" to rerun
that step and downstream steps.

NOTE 1: visual feedback can take some time, give it a few seconds and
you will see the step change color to blue as it starts running.

NOTE 2: steping through only works if you are using ezsteps.

Bisecting megatest.csh/sh
^^^^^^^^^^^^^^^^^^^^^^^^^

Sometimes finding the environment variable that is causing the problem can be very difficult. Bisection can be applied.

Edit the megatest.csh or megatest.sh file and comment out 50% per round, source in fresh xterm and run the test.

This idea can also be applied to your .cshrc, .bashrc, .aliases and other similar files.

csh and -f
^^^^^^^^^^

A common issue when tcsh or csh shells are used for scripting is to forget or choose to not use -f in your #! line

.

Config File Processing
^^^^^^^^^^^^^^^^^^^^^^

As described above it is often helpful to know the content of
variables in various contexts as Megatest works through the actions
needed to run your tests. A handy technique is to force the startup of
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<!DOCTYPE html>
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta name="generator" content="AsciiDoc 8.6.10">
<meta name="generator" content="AsciiDoc 8.6.7">
<title>The Megatest Users Manual</title>
<style type="text/css">
/* Shared CSS for AsciiDoc xhtml11 and html5 backends */

/* Default font. */
body {
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}


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 *
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needed for a test step into a script it is not necessary.</p></div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_debugging">Debugging</h2>
<div class="sectionbody">
<div class="sect2">
<h3 id="_well_written_tests">Well Written Tests</h3>
<div class="sect3">
<h4 id="_test_design_and_surfacing">Test Design and Surfacing</h4>
<div class="paragraph"><p>Design your tests to surface errors. Ensure that all logs are processed by logpro and can be reached by a mouse click or two from the test control panel.</p></div>
<div class="paragraph"><p>using the tool to make life easier</p></div>
<div class="paragraph"><p>layers - less is often more</p></div>
<div class="paragraph"><p>Clicks-to-error</p></div>
</div>
</div>
<div class="sect2">
<h3 id="_a_word_on_bisecting">A word on Bisecting</h3>
<div class="paragraph"><p>Bisecting is a debug strategy intended to speed up finding the root
cause.</p></div>
<div class="imageblock graphviz">
<div class="content">
<img src="bisecting.png" alt="bisecting.png">
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</div></div>
</div>
<div class="sect2">
<h3 id="_trim_trailing_spaces">Trim trailing spaces</h3>
<div class="admonitionblock">
<table><tr>
<td class="icon">
<img src="/usr/images/icons/note.png" alt="Note">
<img src="/nfs/pdx/disks/ice.disk.002/icfadm/pkgs/asciidoc/8.6.7/images/icons/note.png" alt="Note">
</td>
<td class="content">As of Megatest version v1.6548 trim-trailing-spaces defaults to yes.</td>
</tr></table>
</div>
<div class="listingblock">
<div class="content monospaced">
<pre>[configf:settings trim-trailing-spaces no]
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<pre># A normal waiton waits for the prior tests to be COMPLETED
# and PASS, CHECK or WAIVED
waiton test1 test2</pre>
</div></div>
<div class="admonitionblock">
<table><tr>
<td class="icon">
<img src="/usr/images/icons/note.png" alt="Note">
<img src="/nfs/pdx/disks/ice.disk.002/icfadm/pkgs/asciidoc/8.6.7/images/icons/note.png" alt="Note">
</td>
<td class="content">Dynamic waiton lists must be capable of being calculated at the
beginning of a run. This is because Megatest walks the tree of waitons
to create the list of tests to execute.</td>
</tr></table>
</div>
<div class="listingblock">
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<div class="sect2">
<h3 id="_ezsteps">Ezsteps</h3>
<div class="paragraph"><p>Ezsteps is the recommended way to implement tests and automation in
Megatest.</p></div>
<div class="admonitionblock">
<table><tr>
<td class="icon">
<img src="/usr/images/icons/note.png" alt="Note">
<img src="/nfs/pdx/disks/ice.disk.002/icfadm/pkgs/asciidoc/8.6.7/images/icons/note.png" alt="Note">
</td>
<td class="content">Each ezstep must be a single line. Use the [scripts] mechanism
to create multiline scripts (see example below).</td>
</tr></table>
</div>
<div class="listingblock">
<div class="title">Example ezsteps with logpro rules</div>
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<h4 id="_automatic_environment_propagation_with_ezsteps">Automatic environment propagation with Ezsteps</h4>
<div class="paragraph"><p>Turn on ezpropvars and environment variables will be propagated from
step to step. Use this to source script files that modify the
envionment where the modifications are needed in subsequent steps.</p></div>
<div class="admonitionblock">
<table><tr>
<td class="icon">
<img src="/usr/images/icons/note.png" alt="Note">
<img src="/nfs/pdx/disks/ice.disk.002/icfadm/pkgs/asciidoc/8.6.7/images/icons/note.png" alt="Note">
</td>
<td class="content">aliases and variables with strange whitespace or characters will
not propagate correctly. Put in a ticket on the
<a href="http://www.kiatoa.com/fossils/megatest">http://www.kiatoa.com/fossils/megatest</a> site if you need support for a
specific strange character combination.</td>
</tr></table>
</div>
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<div class="content monospaced">
<pre>[triggers]
COMPLETED/ xterm -e bash -s --</pre>
</div></div>
<div class="admonitionblock">
<table><tr>
<td class="icon">
<img src="/usr/images/icons/note.png" alt="Note">
<img src="/nfs/pdx/disks/ice.disk.002/icfadm/pkgs/asciidoc/8.6.7/images/icons/note.png" alt="Note">
</td>
<td class="content">There is a trailing space after the double-dash</td>
</tr></table>
</div>
<div class="paragraph"><p>There are a number of environment variables available to the trigger script
but since triggers can be called in various contexts not all variables are
available at all times. The trigger script should check for the variable and
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</div>
</div>
</div>
<div id="footnotes"><hr></div>
<div id="footer">
<div id="footer-text">
Version 1.5<br>
Last updated
Last updated 2021-09-10 06:09:41 PDT
 2021-09-07 17:58:32 MST
</div>
</div>
</body>
</html>

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[setup]
ezpropvars sh
---------------------------

.Write your ezsteps. The loadenv.csh step will use /bin/csh as its shell, other steps will use bash.
---------------------------
[ezsteps]
# if your upstream file is csh you can force csh like this
loadenv.csh source $REF/ourenviron.csh
# if your upstream is bash 
loadenv     source $REF/ourenviron.sh

compile make
install make install
---------------------------

Bash and csh are supported. You can override the shell binary location
from the default /bin/bash and /bin/csh if needed.
︙

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