NAME

Code::Coverable - Produce overview of coverable lines of code

SYNOPSIS

use Code::Coverable;

say coverable-lines($path.IO);  # (3 5 11 24)

say coverable-lines($source);   # (7 9 23 25)

my @coverables = coverables(@paths);

DESCRIPTION

Code::Coverable contains logic for producing code coverage reports.

This is still a work in progress. At the moment it will only export subroutines and install a script "coverage-lines".

SUBROUTINES

coverable-lines

say coverable-lines($path.IO);  # (3 5 11 24)

say coverable-lines($source);   # (7 9 23 25)

The coverable-lines subroutine takes a single argument which is either a IO::Path or a Str, uses its contents (slurped in case of an IO::Path), tries to build an AST from that and returns a sorted list of line numbers that appear to have coverable code.

coverables

for coverables(@targets) -> $cc {
    say $cc.target;
    say $cc.key;
    say $cc.line-numbers;
    say $cc.source;
}

The coverables subroutine takes any number of positional arguments, each of which is assumed to be a target specification, which can be:

• a Str specification of a Raku source file

• an IO::Path object specifying a Raku source file

• a use target (identity) such as "Foo::Bar:ver<0.0.2+>"

It returns a Seq of Code::Coverable objects. Note that it is possible that even a single target produces more than one Code::Coverable object, if the source of the target has used #line 42 filename directives.

for coverables("String::Utils", :repo<.>, :raw) -> $cc {
    say $cc.target;
    say $cc.key;
    say $cc.line-numbers;
    say $cc.source;
}

If use targets (identities) are specified, a :repo named argument can be specified to indicate the repository to be used, which can be an object of type:

• Str - indicate a path for a ::FileSystem repo, just as with -I.

• IO::Path - indicate a path for a ::FileSystem repo

• CompUnit::Repository - the actual repo to use

The default is to use the current $*REPO setting to resolve any identity given.

The raw named argument can be used to indicate that no heuristics should be applied to mark lines (that are marked as "coverable" by the original discovery method) as not coverable by a set of heuristics. The default is to apply the heuristics. If a True value is specified, then the chance of false negatives in coverage reports is significantly increased.

If a line in the source can not be recognized automatically, then the module developer can add the exact string # UNCOVERABLE at the end of the line that can not be covered.

key2source

print .slurp with key2source($key);  # show source for the given key

The key2source subroutine converts a given coverage key to a IO::Path of the source file (if possible), or returns Nil.

CLASSES

Code::Coverable

The Code::Coverable object is generally created by the coverables subroutine, but could also be created manually.

my $cc = Code::Coverable.new(
  target       => "Identity::Utils",
  line-numbers => (1,14,19,...),
  key          => "site#sources/072CEA63F659CFD963095494CEA22A46E4F93A95 (Identity::Utils)"
  source         => "/.../site/sources/072CEA63F659CFD963095494CEA22A46E4F93A95".IO,
);

The following public attributes are available:

target

Mandatory: a string with the target for these coverables: this can either be use target (identity), or a path to a source file.

line-numbers

Mandatory: a List of unique integer values of the line numbers that could potentially be covered in a coverage log.

key

Optional: a string that should match in the coverage log to mark a line as being "covered". Defaults to the target given.

source

Optional: an IO::Path object of the Raku source file. If not specified, will be derived from the information specified for the key.

SCRIPTS

coverable-lines

$ coverable-lines t/01-basic.rakutest 
t/01-basic.rakutest: 1,3,5,7,8,9,10,13,14,15,16,17

$ coverable-lines snapper
core#sources/0D09916411FC21C59FC3C0980C68547D31562E01 (snapper): 1,8,10

The coverable-lines script accepts any number of paths or use targets and will attempt to produce one line of output with the coverage key and the line numbers of the lines that may appear in a coverage report.

AUTHOR

Elizabeth Mattijsen <[email protected]>

COPYRIGHT AND LICENSE

Copyright 2024, 2025 Elizabeth Mattijsen

Source can be located at: https://github.com/lizmat/Code-Coverable . Comments and Pull Requests are welcome.

If you like this module, or what I'm doing more generally, committing to a small sponsorship would mean a great deal to me!

This library is free software; you can redistribute it and/or modify it under the Artistic License 2.0.

# vim: expandtab shiftwidth=4