test-bot: split into multiple files, add RSpec tests.

This should make it easier to add additional (particularly regression)
tests and generally refactor Homebrew/homebrew-test-bot.

.github/workflows/tests.yml

@@ -21,6 +21,20 @@ jobs:
         rm -rf /usr/local/lib/ruby
       if: matrix.os == 'macOS-latest'
 
+    - name: Set up Ruby
+      uses: actions/setup-ruby@v1
+      with:
+        ruby-version: '>=2.3'
+      if: matrix.os == 'ubuntu-latest'
+
+    - name: Install RubyGems
+      run: |
+        gem install bundler -v "~>1"
+        bundle install --jobs 4 --retry 3
+
+    - name: Run RSpec tests
+      run: bundle exec rspec
+
     - name: Build Docker image
       run: docker-compose -f Dockerfile.yml build sut
       if: matrix.os == 'ubuntu-latest'

.gitignore

@@ -0,0 +1 @@
+coverage/

.travis.yml

@@ -1,3 +1,6 @@
+# don't try to be clever with the Gemfile
+language: c
+
 branches:
   only:
     - master

Gemfile

@@ -0,0 +1,6 @@
+source "https://rubygems.org"
+
+group :test do
+  gem "rspec"
+  gem "simplecov"
+end

Gemfile.lock

@@ -0,0 +1,34 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    diff-lcs (1.3)
+    docile (1.3.2)
+    json (2.2.0)
+    rspec (3.9.0)
+      rspec-core (~> 3.9.0)
+      rspec-expectations (~> 3.9.0)
+      rspec-mocks (~> 3.9.0)
+    rspec-core (3.9.0)
+      rspec-support (~> 3.9.0)
+    rspec-expectations (3.9.0)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.9.0)
+    rspec-mocks (3.9.0)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.9.0)
+    rspec-support (3.9.0)
+    simplecov (0.17.1)
+      docile (~> 1.1)
+      json (>= 1.8, < 3)
+      simplecov-html (~> 0.10.0)
+    simplecov-html (0.10.2)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  rspec
+  simplecov
+
+BUNDLED WITH
+   1.17.2