feat: unit tests

README.md

@@ -2,7 +2,8 @@
 
 A super simple Ruby starter project.
 
-Rubocop and Solargraph are included for linting and code completion, respectively and are configured to be used with [Zed](https://zed.dev/).
+Rubocop and Solargraph are included for linting and code completion,
+respectively and are configured to be used with [Zed](https://zed.dev/).
 
 ## Prerequisites
 
@@ -20,7 +21,9 @@ Rubocop and Solargraph are included for linting and code completion, respectivel
 
 Zed is a rough-around-the-edges editor in Beta. It's not very configurable yet,
 so we're locked into using Solargraph as our language server. Solargraph is
-only officially compatible with [Rubocop](https://rubocop.org/) _(ACAB)_ for linting, but we use our ruleset of choice, [StandardRB] by configuring it in `.rubocop.yml`.
+only officially compatible with [Rubocop](https://rubocop.org/) _(ACAB)_ for
+linting, but we use our ruleset of choice, StandardRB by configuring it in
+`.rubocop.yml`.
 
 For now, make sure that StandardRB is installed globally, as Zed can't yet reach
 into your local Gem's, as far as we are aware.
@@ -45,4 +48,9 @@ inline diagnostics and formatting on save you must add the following to your Zed
 ## Documentation
 
 If you'd like to generate some user-friendly documentation, you can run
-`rake` on the command line to generate some HTML docs in the `rdoc` directory, made up of your comments and some metadata from your code.
+`rake rdoc` on the command line to generate some HTML docs in the `rdoc` directory, made up of your comments and some metadata from your code.
+
+## Testing
+
+An example unit test is included in `test/example_test.rb`. You can run the
+tests with `rake test`.

Rakefile

@@ -1,5 +1,5 @@
 require "rdoc/task"
-task default: [:rdoc]
+require 'rake/testtask'
 
 Rake::RDocTask.new do |rdoc|
   rdoc.rdoc_dir = "rdoc"
@@ -7,3 +7,9 @@ Rake::RDocTask.new do |rdoc|
   rdoc.options << "--line-numbers" << "--inline-source"
   rdoc.rdoc_files.include("**/*.rb")
 end
+
+Rake::TestTask.new do |t|
+  t.libs << "test"
+  t.test_files = FileList['tests/test*.rb']
+  t.verbose = true
+end

tests/test_example.rb

@@ -0,0 +1,7 @@
+require "test/unit"
+
+class TestExample < Test::Unit::TestCase
+	def test_example
+		assert_equal(4, 2 + 2)
+	end
+end