Fix flaky tests in podcasts_spec

Author: yasulab

spec/lib/tasks/podcasts_spec.rb

@@ -26,21 +26,37 @@
 
     let(:task) { 'podcasts:upsert' }
 
-    # TODO: This test is flaky? It seems fails depending on Internet and should work offline.
-    xit 'successfuly fetch from Anchor.fm RSS' do
-      allow_any_instance_of(Podcast).to receive(:id).and_return(
-        [
-          { 'id'            => 123456001,
-            'title'         => '999 - podcast title',
-            'description'   => '説明 999',
-            'content_size'  => 124542711,
-            'duration'      => 5189815,
-            'user_id'       => 123456789,
-            'permalink'     => '999-title',
-            'permalink_url' => 'https://anchor.fm/coderdojo-japan/999-title',
-            'created_at'    => '2099/01/23 01:00:00 +0000' }
-        ]
+    it 'successfuly fetch from RSS (mock)' do
+      # RSSのモック
+      rss_content = <<~RSS
+        <?xml version="1.0" encoding="UTF-8"?>
+        <rss version="2.0">
+          <channel>
+            <item>
+              <title>001 - 日本の CoderDojo の成り立ち</title>
+              <description>jishihaの説明文</description>
+              <link>https://anchor.fm/coderdojo-japan/episodes/001----CoderDojo-euhits</link>
+              <pubDate>Sat, 25 Mar 2017 00:00:00 GMT</pubDate>
+              <enclosure url="https://example.com/podcast.mp3" length="22887860" type="audio/mpeg"/>
+              <itunes:duration>2857</itunes:duration>
+            </item>
+          </channel>
+        </rss>
+      RSS
+
+      # RSS::Parserのモック
+      rss_parser = instance_double(RSS::Rss)
+      rss_item = instance_double(RSS::Rss::Channel::Item)
+      allow(rss_item).to receive(:title).and_return('001 - 日本の CoderDojo の成り立ち')
+      allow(rss_item).to receive(:description).and_return('jishihaの説明文')
+      allow(rss_item).to receive(:link).and_return('https://anchor.fm/coderdojo-japan/episodes/001----CoderDojo-euhits')
+      allow(rss_item).to receive(:pubDate).and_return(Time.parse('2017-03-25'))
+      allow(rss_item).to receive(:enclosure).and_return(
+        instance_double(RSS::Rss::Channel::Item::Enclosure, url: 'https://example.com/podcast.mp3', length: 22887860)
       )
+      allow(rss_item).to receive(:itunes_duration).and_return(double(content: '2857', to_s: '2857'))
+      allow(rss_parser).to receive(:items).and_return([rss_item])
+      allow(RSS::Parser).to receive(:parse).and_return(rss_parser)
 
       # before
       expect(Podcast.count).to eq(1)
@@ -52,14 +68,14 @@
       # after
       expect(Podcast.count).not_to eq(1)
       new_records = Podcast.where.not(id: before_ids)
-      expect(new_records.count).not_to eq(1)
-      first_track = new_records.find(1)
+      expect(new_records.count).to eq(1)
+      first_track = new_records.first
 
       expect(first_track.title).to          eq('001 - 日本の CoderDojo の成り立ち')
       expect(first_track.description).to    start_with('jishiha')
       expect(first_track.content_size).to   eq(22887860)
-      expect(first_track.duration).to       eq('2857')      # eq('00:47:37')
-      expect(first_track.permalink).to      eq('001----CoderDojo-euhits') # eq('999-title')
+      expect(first_track.duration).to       eq('2857')
+      expect(first_track.permalink).to      eq('001----CoderDojo-euhits')
       expect(first_track.permalink_url).to  eq('https://anchor.fm/coderdojo-japan/episodes/001----CoderDojo-euhits')
       expect(first_track.published_date).to eq('2017-03-25'.to_date)
     end