Add tests for TurboStreamable concern

spec/controllers/concerns/turbo_streamable_spec.rb

@@ -0,0 +1,73 @@
+# frozen_string_literal: true
+
+require "rails_helper"
+
+class TurboStreamableTestController < ApplicationController
+  include TurboStreamable
+
+  turbo_stream_actions :create, :blocked, :not_found
+
+  def create
+    params.require :message
+
+    respond_to do |format|
+      format.turbo_stream do
+        render turbo_stream: render_toast("success!")
+      end
+    end
+  end
+
+  def blocked
+    raise Errors::Blocked
+  end
+
+  def not_found
+    raise ActiveRecord::RecordNotFound
+  end
+end
+
+describe TurboStreamableTestController, type: :controller do
+  render_views
+
+  before do
+    routes.disable_clear_and_finalize = true
+    routes.draw do
+      get "turbo_streamable" => "turbo_streamable_test#create"
+      get "turbo_streamable_blocked" => "turbo_streamable_test#blocked"
+      get "turbo_streamable_not_found" => "turbo_streamable_test#not_found"
+    end
+    routes.finalize!
+  end
+
+  shared_examples_for "it returns a toast as Turbo Stream response" do |action, message|
+    subject { get action, format: :turbo_stream }
+
+    it "returns a toast as Turbo Stream response" do
+      subject
+
+      expect(response.header["Content-Type"]).to include "text/vnd.turbo-stream.html"
+      expect(response.body).to include message
+    end
+  end
+
+  describe "#create" do
+    context "gets called with the proper parameters" do
+      subject { get :create, format: :turbo_stream, params: { message: "test" } }
+
+      it "returns a toast as Turbo Stream response" do
+        subject
+
+        expect(response.header["Content-Type"]).to include "text/vnd.turbo-stream.html"
+        expect(response.body).to include "success!"
+      end
+    end
+
+    context "gets called with the wrong parameters" do
+      it_behaves_like "it returns a toast as Turbo Stream response", :create, "Message is required"
+    end
+  end
+
+  it_behaves_like "it returns a toast as Turbo Stream response", :create, "Message is required"
+  it_behaves_like "it returns a toast as Turbo Stream response", :blocked, "You have been blocked from performing this request"
+  it_behaves_like "it returns a toast as Turbo Stream response", :not_found, "Record not found"
+end