DEV: Add tests for wistia onebox. (#15860)

Follow-up to 4ef56b0ca4

lib/onebox/engine/wistia_onebox.rb

@@ -17,15 +17,15 @@ module Onebox
         if extracted_url
           iframe_src = extracted_url[1]
 
-          <<-HTML
-            <iframe
-              src="#{iframe_src}"
-              width="#{oembed.width}"
-              height="#{oembed.height}"
-              title="#{oembed.title}"
-              frameborder="0"
-              allowfullscreen
-            ></iframe>
+          <<~HTML
+          <iframe
+            src="#{iframe_src}"
+            width="#{oembed.width}"
+            height="#{oembed.height}"
+            title="#{oembed.title}"
+            frameborder="0"
+            allowfullscreen
+          ></iframe>
           HTML
         else
           oembed.html

spec/lib/onebox/engine/wistia_onebox_spec.rb

@@ -0,0 +1,26 @@
+# frozen_string_literal: true
+
+require "rails_helper"
+
+describe Onebox::Engine::WistiaOnebox do
+  before do
+    body = '{"version":"1.0","type":"video","html":"\u003ciframe src=\"https://fast.wistia.net/embed/iframe/26sk4lmiix\" title=\"Nice. Video\" allow=\"autoplay; fullscreen\" allowtransparency=\"true\" frameborder=\"0\" scrolling=\"no\" class=\"wistia_embed\" name=\"wistia_embed\" msallowfullscreen width=\"960\" height=\"540\"\u003e\u003c/iframe\u003e\n\u003cscript src=\"https://fast.wistia.net/assets/external/E-v1.js\" async\u003e\u003c/script\u003e","width":960,"height":540,"provider_name":"Wistia, Inc.","provider_url":"https://wistia.com","title":"Nice. ","thumbnail_url":"https://embed-ssl.wistia.com/deliveries/56cacb9a5d6ea04b1f29defaf4b55d1ec979e1b0.jpg?image_crop_resized=960x540","thumbnail_width":960,"thumbnail_height":540,"player_color":"f27398","duration":44.42}'
+
+    stub_request(:get, "https://fast.wistia.com/oembed?embedType=iframe&url=https://support.wistia.com/medias/26sk4lmiix")
+      .to_return(status: 200, body: body, headers: {})
+  end
+
+  it "returns the right HTML markup for the onebox" do
+    expect(Onebox.preview('https://support.wistia.com/medias/26sk4lmiix').to_s.chomp).to eq(
+      '<iframe src="https://fast.wistia.net/embed/iframe/26sk4lmiix" width="960" height="540" title="Nice." frameborder="0" allowfullscreen="" seamless="seamless" sandbox="allow-same-origin allow-scripts allow-forms allow-popups allow-popups-to-escape-sandbox allow-presentation"></iframe>'
+    )
+  end
+
+  describe '#placeholder_html' do
+    it "returns the right img HTML markup" do
+      expect(Onebox.preview('https://support.wistia.com/medias/26sk4lmiix').placeholder_html).to eq(
+        "<img src=\"https://embed-ssl.wistia.com/deliveries/56cacb9a5d6ea04b1f29defaf4b55d1ec979e1b0.jpg?image_crop_resized=960x540\" title=\"Nice.\">"
+      )
+    end
+  end
+end