Re^2: RFC: How did I do writing my first test?

After all of the talk about final newlines, and a problem just hit me in the head. I did not take into consideration blank lines in files. What if a file has a blank line or two in the middle? If there is a blank line it currently, the before and after still get put on the list without any other value.

test.txt (file)

red
orange
yellow
spring
green
teal
cyan
azure

blue
violet
magenta
pink
white
black
gray
[download]

Code

perl -E '
use lib "mods/lib";
use Fancy::Open qw(fancy_open);
my @array=fancy_open("test.txt", { before => "solid ", after => " bead
+" });
say $_ for @array;
'
[download]

Result

solid red bead
solid orange bead
solid yellow bead
solid spring bead
solid green bead
solid teal bead
solid cyan bead
solid azure bead
solid  bead
solid blue bead
solid violet bead
solid magenta bead
solid pink bead
solid white bead
solid black bead
solid gray bead
[download]

So, I am now three steps back from being ready to package this module. *sighs*

I didn't feel like fighting with splice right now to add an empty line in the test script.

My OS is Debian 10 (Buster); my perl versions are 5.28.1 local and 5.16.3 or 5.30.0 on web host depending on the shebang.

No matter how hysterical I get, my problems are not time sensitive. So, relax, have a cookie, and a very nice day!

Lady Aleena

Comment on Re^2: RFC: How did I do writing my first test? Select or Download Code

Replies are listed 'Best First'.
Re^3: RFC: How did I do writing my first test? by jcb (Parson) on Sep 27, 2020 at 02:33 UTC
This is why you should write full-coverage testsuites — in the course of testing every path, you are likely to find edge cases that you had not recognized before. For this particular problem, the easiest solution, assuming that you chomp each input line is to put the code that adds `before` and `after` strings in an `unless (m/^$/)` block. (If you do not `chomp` the input, change the regex match to `m[^$/$]`, quickly tested here with `perl -e 'while (<>) { print "empty\n" if m[^$/$] }'` and typing some sample input.)	[reply] [d/l] [select]
Re^4: RFC: How did I do writing my first test? by stevieb (Canon) on Sep 28, 2020 at 01:51 UTC
"This is why you should write full-coverage testsuites — in the course of testing every path, you are likely to find edge cases that you had not recognized before." An API (or any code) should have tests written before, during and after completion. Especially after the documentation is completed, to verify. You're right about the edge cases. They get found in testing, and then become tests themselves. If one doesn't find issues when running their test suites against their code after significant updates, the test suite is insufficient.	[reply]
Re^3: RFC: How did I do writing my first test? by Arunbear (Prior) on Sep 26, 2020 at 18:06 UTC
What does the documentation say about how it handles blank lines? :) i.e. this may well be the correct behaviour (but you'd need to think about and document that).	[reply]


Welcome to the Monastery
	PerlMonks