Added simplecov

[amihaiemil]

PR for #10
Added simplecov for test coverage measurement.
Next step: figure out how to display a badge with percentage in the README.

[amihaiemil]

@rultor merge it please

[rultor]

@rultor merge it please

@amihaiemil OK, I'll try to merge now. You can check the progress of the merge here

[rultor]

@rultor merge it please

@amihaiemil Oops, I failed. You can see the full log here (spent 2min)

WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
+ set -e
+ set -o pipefail
+ shopt -s dotglob
+ useradd -m -G sudo r
+ usermod -s /bin/bash r
+ echo '%sudo ALL=(ALL) NOPASSWD:ALL'
+ cp -R /root/.bashrc /root/.cache /root/.composer /root/.gem /root/.gnupg /root/.m2 /root/.profile /root/texmf /home/r
+ cp -R ./cid ./end.sh ./entry.sh ./pid ./repo ./run.sh ./script.sh ./stdout /home/r
+ rm -rf repo
+ chown -R r:r /home/r
+ chmod a+x /home/r/script.sh
+ su --login r --command /home/r/script.sh
mesg: cannot open /dev/pts/0: Permission denied
+ set -e
+ set -o pipefail
+ shopt -s expand_aliases
+ alias 'sudo=sudo -i'
+ export HOME=/home/r
+ HOME=/home/r
+ cd /home/r/repo
+ export head=git@github.com:ruby-ee/ruby-stream-api.git
+ head=git@github.com:ruby-ee/ruby-stream-api.git
+ export pull_id=22
+ pull_id=22
+ export fork=git@github.com:ruby-ee/ruby-stream-api.git
+ fork=git@github.com:ruby-ee/ruby-stream-api.git
+ export fork_branch=10
+ fork_branch=10
+ export head_branch=master
+ head_branch=master
+ export 'pull_title=Added simplecov'
+ pull_title='Added simplecov'
+ export author=amihaiemil
+ author=amihaiemil
+ export GEM_HOME=/home/r/.ruby
+ GEM_HOME=/home/r/.ruby
+ export GEM_PATH=/home/r/.ruby:/usr/local/rvm/gems/ruby-2.6.0:/usr/local/rvm/gems/ruby-2.6.0@global
+ GEM_PATH=/home/r/.ruby:/usr/local/rvm/gems/ruby-2.6.0:/usr/local/rvm/gems/ruby-2.6.0@global
+ bundle install
\u001b[31m
[!] There was an error parsing `Gemfile`: 
[!] There was an error while loading `ruby-stream-api.gemspec`: cannot load such file -- simplecov
Does it try to require a relative path? That's been removed in Ruby 1.9. Bundler cannot continue.

 #  from /home/r/repo/ruby-stream-api.gemspec:1
 #  -------------------------------------------
 >  require 'simplecov'
 #  SimpleCov.start do
 #  -------------------------------------------
. Bundler cannot continue.

 #  from /home/r/repo/Gemfile:4
 #  -------------------------------------------
 #  # Specify your gem's dependencies in ruby-stream-api.gemspec
 >  gemspec
 #  
 #  -------------------------------------------
\u001b[0mcontainer ff554141984f58e473c63584a19785cd5de228d141446ec64fc6669886885e71 is dead
Tue Apr 28 20:21:51 CEST 2020