Failing test for stacked versions w/ catch-all

#1799

spec/grape/version_fallback_spec.rb

@@ -0,0 +1,128 @@
+require 'spec_helper'
+require 'shared/versioning_examples'
+
+describe Grape::API do
+  subject { Class.new(Grape::API) }
+
+  def app
+    subject
+  end
+
+  before do
+    api1 = Class.new(Grape::API)
+    api1.version %w(v3 v2 v1), version_options
+    api1.get('all') { 'v1' }
+    api1.get('only_v1') { 'only_v1' }
+
+    api2 = Class.new(Grape::API)
+    api2.version %w(v3 v2), version_options
+    api2.get('all') { 'v2' }
+    api2.get('only_v2') { 'only_v2' }
+
+    api3 = Class.new(Grape::API)
+    api3.version 'v3', version_options
+    api3.get('all') { 'v3' }
+
+    app.mount api3
+    app.mount api2
+    app.mount api1
+  end
+
+  shared_examples 'version fallback' do
+    it 'returns the correct version' do
+      versioned_get '/all', 'v1', version_options
+      expect(last_response.status).to eq(200)
+      expect(last_response.body).to eq('v1')
+
+      versioned_get '/all', 'v2', version_options
+      expect(last_response.status).to eq(200)
+      expect(last_response.body).to eq('v2')
+
+      versioned_get '/all', 'v3', version_options
+      expect(last_response.status).to eq(200)
+      expect(last_response.body).to eq('v3')
+
+      versioned_get '/only_v1', 'v2', version_options
+      expect(last_response.status).to eq(200)
+      expect(last_response.body).to eq('only_v1')
+
+      versioned_get '/only_v1', 'v3', version_options
+      expect(last_response.status).to eq(200)
+      expect(last_response.body).to eq('only_v1')
+
+      versioned_get '/only_v2', 'v3', version_options
+      expect(last_response.status).to eq(200)
+      expect(last_response.body).to eq('only_v2')
+    end
+  end
+
+  context 'with catch-all' do
+    before do
+      app.route :any, '*path' do
+        error!("Unrecognized request path: #{params[:path]} - #{env['PATH_INFO']}#{env['SCRIPT_NAME']}", 404)
+      end
+    end
+
+    shared_examples 'catch-all' do
+      it 'returns a 404' do
+        get '/foobar'
+        expect(last_response.status).to eq(404)
+        expect(last_response.body).to eq('Unrecognized request path: foobar - /foobar')
+      end
+    end
+
+    context 'using path' do
+      let(:version_options) { { using: :path } }
+
+      it_behaves_like 'version fallback'
+      it_behaves_like 'catch-all'
+    end
+
+    context 'using param' do
+      let(:version_options) { { using: :param } }
+
+      it_behaves_like 'version fallback'
+      it_behaves_like 'catch-all'
+    end
+
+    context 'using accept_version_header' do
+      let(:version_options) { { using: :accept_version_header } }
+
+      it_behaves_like 'version fallback'
+      it_behaves_like 'catch-all'
+    end
+
+    context 'using header' do
+      let(:version_options) { { using: :header, vendor: 'test' } }
+
+      it_behaves_like 'version fallback'
+      it_behaves_like 'catch-all'
+    end
+  end
+
+  context 'without catch-all' do
+    context 'using path' do
+      let(:version_options) { { using: :path } }
+
+      it_behaves_like 'version fallback'
+    end
+
+    context 'using param' do
+      let(:version_options) { { using: :param } }
+
+      it_behaves_like 'version fallback'
+    end
+
+    context 'using accept_version_header' do
+      let(:version_options) { { using: :accept_version_header } }
+
+      it_behaves_like 'version fallback'
+    end
+
+    context 'using header' do
+      let(:version_options) { { using: :header, vendor: 'test' } }
+
+      it_behaves_like 'version fallback'
+    end
+  end
+end

spec/support/versioned_helpers.rb

@@ -46,7 +46,7 @@ def versioned_get(path, version_name, version_options = {})
         headers = versioned_headers(version_options.merge(version: version_name))
         params = {}
         if version_options[:using] == :param
-          params = { version_options[:parameter] => version_name }
+          params = { version_options.fetch(:parameter, 'apiver') => version_name }
         end
         get path, params, headers
       end