Proof-of-concept minitest integration.

Rough around the edges, but shows it can be done.

Gemfile

@@ -6,6 +6,7 @@ gemspec
 gem 'rails', ENV['RAILS_VERSION'] || '6.0.3.7'
 gem 'roda'
 gem 'rspec-rails'
+gem 'rspec'
 
 group :test do
   gem 'super_diff'

lib/rspec/openapi.rb

@@ -1,5 +1,10 @@
 require 'rspec/openapi/version'
-require 'rspec/openapi/hooks' if ENV['OPENAPI']
+
+require 'rspec/openapi/minitest' if defined?(Minitest)
+
+if ENV['OPENAPI']
+  require 'rspec/openapi/hooks' if defined?(RSpec::Example)
+end
 
 module RSpec::OpenAPI
   @path = 'doc/openapi.yaml'
@@ -13,6 +18,8 @@ module RSpec::OpenAPI
   @security_schemes = []
   @example_types = %i[request]
   @response_headers = []
+  @path_records = Hash.new { |h, k| h[k] = [] }
+  @error_records = {}
 
   class << self
     attr_accessor :path,
@@ -25,6 +32,8 @@ class << self
                   :servers,
                   :security_schemes,
                   :example_types,
-                  :response_headers
+                  :response_headers,
+                  :path_records,
+                  :error_records
   end
 end

lib/rspec/openapi/minitest.rb

@@ -0,0 +1,81 @@
+require 'rspec/openapi/components_updater'
+require 'rspec/openapi/default_schema'
+require 'rspec/openapi/record_builder'
+require 'rspec/openapi/schema_builder'
+require 'rspec/openapi/schema_file'
+require 'rspec/openapi/schema_merger'
+require 'rspec/openapi/schema_cleaner'
+
+module RSpec
+  module OpenAPI
+    module Minitest
+      class Example < Struct.new(:context, :description, :metadata) ; end
+
+      module TestPatch
+        def self.prepended(base)
+          base.extend(ClassMethods)
+        end
+
+        def run(*args)
+          result = super
+          if ENV['OPENAPI'] && self.class.openapi?
+            path = RSpec::OpenAPI.path.yield_self { |p| p.is_a?(Proc) ? p.call(example) : p }
+            example = Example.new(self, name, {})
+            record = RSpec::OpenAPI::RecordBuilder.build(self, example: example)
+            RSpec::OpenAPI.path_records[path] << record if record
+          end
+          result
+        end
+
+        def inspect
+          self.class.to_s
+        end
+
+        module ClassMethods
+          def openapi?
+            @openapi
+          end
+
+          def openapi!
+            @openapi = true
+          end
+        end
+      end
+    end
+  end
+end
+
+Minitest::Test.prepend RSpec::OpenAPI::Minitest::TestPatch
+
+Minitest.after_run do
+  if ENV['OPENAPI']
+    title = File.basename(Dir.pwd)
+    RSpec::OpenAPI.path_records.each do |path, records|
+      RSpec::OpenAPI::SchemaFile.new(path).edit do |spec|
+        schema = RSpec::OpenAPI::DefaultSchema.build(title)
+        schema[:info].merge!(RSpec::OpenAPI.info)
+        RSpec::OpenAPI::SchemaMerger.merge!(spec, schema)
+        new_from_zero = {}
+        records.each do |record|
+          begin
+            record_schema = RSpec::OpenAPI::SchemaBuilder.build(record)
+            RSpec::OpenAPI::SchemaMerger.merge!(spec, record_schema)
+            RSpec::OpenAPI::SchemaMerger.merge!(new_from_zero, record_schema)
+          rescue StandardError, NotImplementedError => e # e.g. SchemaBuilder raises a NotImplementedError
+            RSpec::OpenAPI.error_records[e] = record # Avoid failing the build
+          end
+        end
+        RSpec::OpenAPI::SchemaCleaner.cleanup!(spec, new_from_zero)
+        RSpec::OpenAPI::ComponentsUpdater.update!(spec, new_from_zero)
+      end
+    end
+    if RSpec::OpenAPI.error_records.any?
+      error_message = <<~EOS
+        RSpec::OpenAPI got errors building #{RSpec::OpenAPI.error_records.size} requests
+
+        #{RSpec::OpenAPI.error_records.map {|e, record| "#{e.inspect}: #{record.inspect}" }.join("\n")}
+      EOS
+      puts error_message
+    end
+  end
+end

rspec-openapi.gemspec

@@ -24,5 +24,4 @@ Gem::Specification.new do |spec|
   spec.require_paths = ['lib']
 
   spec.add_dependency 'actionpack', '>= 5.2.0'
-  spec.add_dependency 'rspec'
 end