Add rspec and update dependencies

.gitignore

@@ -5,4 +5,5 @@
 /doc/
 /pkg/
 /spec/reports/
+/spec/examples.txt
 /tmp/

.rspec

@@ -0,0 +1 @@
+--require spec_helper

Gemfile.lock

@@ -11,6 +11,7 @@ GEM
   specs:
     ast (2.4.0)
     cinch (2.3.4)
+    diff-lcs (1.3)
     mustermann (1.0.2)
     parallel (1.12.1)
     parser (2.5.0.3)
@@ -21,9 +22,22 @@ GEM
       rack
     rainbow (3.0.0)
     rake (12.3.0)
-    rubocop (0.52.1)
+    rspec (3.7.0)
+      rspec-core (~> 3.7.0)
+      rspec-expectations (~> 3.7.0)
+      rspec-mocks (~> 3.7.0)
+    rspec-core (3.7.1)
+      rspec-support (~> 3.7.0)
+    rspec-expectations (3.7.0)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.7.0)
+    rspec-mocks (3.7.0)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.7.0)
+    rspec-support (3.7.1)
+    rubocop (0.53.0)
       parallel (~> 1.10)
-      parser (>= 2.4.0.2, < 3.0)
+      parser (>= 2.5)
       powerpack (~> 0.1)
       rainbow (>= 2.2.2, < 4.0)
       ruby-progressbar (~> 1.7)
@@ -44,8 +58,9 @@ PLATFORMS
 DEPENDENCIES
   bundler (~> 1.16)
   codebot!
-  rake (~> 12.0)
-  rubocop (~> 0.52.1)
+  rake (~> 12.3)
+  rspec (~> 3.7)
+  rubocop (~> 0.53)
 
 BUNDLED WITH
    1.16.1

codebot.gemspec

@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-lib = File.expand_path('../lib', __FILE__)
+lib = File.expand_path('lib', __dir__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 
 require 'codebot/metadata'
@@ -38,8 +38,9 @@ Gem::Specification.new do |spec|
   spec.required_ruby_version = '>= 2.2.0'
 
   spec.add_development_dependency 'bundler', '~> 1.16'
-  spec.add_development_dependency 'rake', '~> 12.0'
-  spec.add_development_dependency 'rubocop', '~> 0.52.1'
+  spec.add_development_dependency 'rake', '~> 12.3'
+  spec.add_development_dependency 'rspec', '~> 3.7'
+  spec.add_development_dependency 'rubocop', '~> 0.53'
 
   spec.add_runtime_dependency 'cinch', '~> 2.3'
   spec.add_runtime_dependency 'sinatra', '~> 2.0'

spec/spec_helper.rb

@@ -0,0 +1,22 @@
+# frozen_string_literal: true
+
+RSpec.configure do |config|
+  config.expect_with :rspec do |expectations|
+    expectations.include_chain_clauses_in_custom_matcher_descriptions = true
+  end
+
+  config.mock_with :rspec do |mocks|
+    mocks.verify_partial_doubles = true
+  end
+
+  config.shared_context_metadata_behavior = :apply_to_host_groups
+  config.example_status_persistence_file_path = 'spec/examples.txt'
+  config.disable_monkey_patching!
+  config.warnings = true
+
+  config.default_formatter = 'doc' if config.files_to_run.one?
+
+  config.profile_examples = 10
+  config.order = :random
+  Kernel.srand config.seed
+end