Remove minitest gem altogether, make specs more rspec-y, add a spec for the array form of :on

.rspec

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

CHANGELOG.md

@@ -1,5 +1,6 @@
 ## HEAD
 
+* Replace `minitest` gem with `rspec`
 * Fancier README
 * Remove unnecessary short circuit in `randomize` method
 

Gemfile

@@ -4,7 +4,6 @@ gemspec
 
 group :test do
   gem "codeclimate-test-reporter", require: false
-  gem "minitest-focus"
   gem "rspec"
   gem "simplecov", require: false
 end

README.md

@@ -315,3 +315,9 @@ RetriableProxy.for_object(api_endpoint, on: Net::TimeoutError)
 ## Credits
 
 The randomized exponential backoff implementation was inspired by the one used in Google's [google-http-java-client](https://code.google.com/p/google-http-java-client/wiki/ExponentialBackoff) project.
+
+## Development
+### Running Specs
+```bash
+bundle exec rspec
+```

retriable.gemspec

@@ -21,11 +21,7 @@ Gem::Specification.new do |spec|
   spec.required_ruby_version = ">= 2.0.0"
 
   spec.add_development_dependency "bundler"
-  spec.add_development_dependency "rake", "~> 12.0"
-
-  spec.add_development_dependency "minitest", "~> 5.10"
-  spec.add_development_dependency "guard"
-  spec.add_development_dependency "guard-minitest"
+  spec.add_development_dependency "rspec", "~> 12.0"
 
   if RUBY_VERSION < "2.3"
     spec.add_development_dependency "ruby_dep", "~> 1.3.1"

spec/config_spec.rb

@@ -1,51 +1,49 @@
-require_relative "spec_helper"
-
 describe Retriable::Config do
-  let(:config) { described_class.new }
+  let(:default_config) { described_class.new }
 
   context "defaults" do
     it "sleep defaults to enabled" do
-      expect(config.sleep_disabled).to be_falsey
+      expect(default_config.sleep_disabled).to be_falsey
     end
 
     it "tries defaults to 3" do
-      expect(config.tries).to eq(3)
+      expect(default_config.tries).to eq(3)
     end
 
     it "max interval defaults to 60" do
-      expect(config.max_interval).to eq(60)
+      expect(default_config.max_interval).to eq(60)
     end
 
     it "randomization factor defaults to 0.5" do
-      expect(config.base_interval).to eq(0.5)
+      expect(default_config.base_interval).to eq(0.5)
     end
 
     it "multiplier defaults to 1.5" do
-      expect(config.multiplier).to eq(1.5)
+      expect(default_config.multiplier).to eq(1.5)
     end
 
     it "max elapsed time defaults to 900" do
-      expect(config.max_elapsed_time).to eq(900)
+      expect(default_config.max_elapsed_time).to eq(900)
     end
 
     it "intervals defaults to nil" do
-      expect(config.intervals).to be_nil
+      expect(default_config.intervals).to be_nil
     end
 
     it "timeout defaults to nil" do
-      expect(config.timeout).to be_nil
+      expect(default_config.timeout).to be_nil
     end
 
     it "on defaults to [StandardError]" do
-      expect(config.on).to eq([StandardError])
+      expect(default_config.on).to eq([StandardError])
     end
 
     it "on retry handler defaults to nil" do
-      expect(config.on_retry).to be_nil
+      expect(default_config.on_retry).to be_nil
     end
 
     it "contexts defaults to {}" do
-      expect(config.contexts).to eq({})
+      expect(default_config.contexts).to eq({})
     end
   end
 

spec/exponential_backoff_spec.rb

@@ -1,5 +1,3 @@
-require_relative "spec_helper"
-
 describe Retriable::ExponentialBackoff do
   context "defaults" do
     let(:backoff_config) { described_class.new }
@@ -56,11 +54,7 @@
   end
 
   it "generates intervals with a defined max interval" do
-    expect(described_class.new(max_interval: 1.0, rand_factor: 0.0).intervals).to eq([
-      0.5,
-      0.75,
-      1.0,
-    ])
+    expect(described_class.new(max_interval: 1.0, rand_factor: 0.0).intervals).to eq([0.5, 0.75, 1.0])
   end
 
   it "generates intervals with a defined rand_factor" do