0.0% coverage on basic test

[dslik]

Greetings. Working on updating some OLD scripts that used rcov, and I'm running in some difficulties getting coverage output.

I have simplecov-0.21.2 installed, and I'm running ruby 2.6.8p205 (2021-07-07 revision 67951) [universal.x86_64-darwin21]

I don't have anything else installed for this test, and I'm not using a test framework, just running the ruby script from the command line directly.

Here's the minimalist ruby file I'm using to test:

require 'simplecov'

SimpleCov.start
SimpleCov.command_name "ruby"

=begin
This is a block comment
=end

print "Hello World\n\n"
return

This returns "No data available in table".

When I replace SimpleCov.start with the following:

SimpleCov.start do
    track_files "*.rb"
end

I get "0 / 10 LOC (0.0%) covered."

Every line is included as not being covered, including the text within the block comment:

I tried adding @filters = [] as suggested in issue #77, but no change.

Perhaps someone can point me to what I'm doing wrong?

Thanks!