--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test_silos_twitter.py	Sun Jul 29 10:40:05 2018 -0700
@@ -0,0 +1,137 @@
+import pytest
+from .mockutil import mock_urllib
+
+
+def test_one_article(cli, feedutil, tweetmock):
+    feed = cli.createTempFeed(feedutil.makeFeed(
+        """<h1 class="p-name">A new article</h1>
+<div class="e-content">
+<p>This is the text of the article.</p>
+<p>It has 2 paragraphs.</p>
+</div>
+<a class="u-url" href="https://example.org/a-new-article">permalink</a>"""
+    ))
+
+    cli.appendSiloConfig('test', 'twitter', url='/blah')
+    tweetmock.installTokens(cli, 'test')
+
+    ctx, _ = cli.run('process', feed)
+    assert ctx.cache.wasPosted('test', 'https://example.org/a-new-article')
+    toot = ctx.silos[0].client.tweets[0]
+    assert toot == ('A new article https://example.org/a-new-article', None)
+
+
+def test_one_micropost(cli, feedutil, tweetmock):
+    feed = cli.createTempFeed(feedutil.makeFeed(
+        """<p class="p-name">This is a quick update.</p>
+<a class="u-url" href="/01234.html">permalink</a>"""
+    ))
+
+    cli.appendSiloConfig('test', 'twitter', url='/blah')
+    tweetmock.installTokens(cli, 'test')
+
+    ctx, _ = cli.run('process', feed)
+    assert ctx.cache.wasPosted('test', '/01234.html')
+    toot = ctx.silos[0].client.tweets[0]
+    assert toot == ("This is a quick update.", None)
+
+
+def test_one_micropost_with_one_photo(cli, feedutil, tweetmock, monkeypatch):
+    feed = cli.createTempFeed(feedutil.makeFeed(
+        """<p class="p-name">This is a quick photo update.</p>
+<div>
+    <a class="u-photo" href="/fullimg.jpg"><img src="/thumbimg.jpg"/></a>
+</div>
+<a class="u-url" href="/01234.html">permalink</a>"""
+    ))
+
+    cli.appendSiloConfig('test', 'twitter', url='/blah')
+    tweetmock.installTokens(cli, 'test')
+
+    with monkeypatch.context() as m:
+        import silorider.silos.twitter
+        mock_urllib(m)
+        m.setattr(silorider.silos.twitter.TwitterSilo, '_media_callback',
+                  _patched_media_callback)
+        ctx, _ = cli.run('process', feed)
+
+    assert ctx.cache.wasPosted('test', '/01234.html')
+    media = ctx.silos[0].client.media[0]
+    assert media == ('/retrieved/fullimg.jpg', 1)
+    toot = ctx.silos[0].client.tweets[0]
+    assert toot == ("This is a quick photo update.", [1])
+
+
+def test_one_micropost_with_two_photos(cli, feedutil, tweetmock, monkeypatch):
+    feed = cli.createTempFeed(feedutil.makeFeed(
+        """<p class="p-name">This is a photo update with 2 photos.</p>
+<div>
+    <a class="u-photo" href="/fullimg1.jpg"><img src="/thumbimg1.jpg"/></a>
+    <a class="u-photo" href="/fullimg2.jpg"><img src="/thumbimg2.jpg"/></a>
+</div>
+<a class="u-url" href="/01234.html">permalink</a>"""
+    ))
+
+    cli.appendSiloConfig('test', 'twitter', url='/blah')
+    tweetmock.installTokens(cli, 'test')
+
+    with monkeypatch.context() as m:
+        import silorider.silos.twitter
+        mock_urllib(m)
+        m.setattr(silorider.silos.twitter.TwitterSilo, '_media_callback',
+                  _patched_media_callback)
+        ctx, _ = cli.run('process', feed)
+
+    assert ctx.cache.wasPosted('test', '/01234.html')
+    media = ctx.silos[0].client.media[0]
+    assert media == ('/retrieved/fullimg1.jpg', 1)
+    media = ctx.silos[0].client.media[1]
+    assert media == ('/retrieved/fullimg2.jpg', 2)
+    toot = ctx.silos[0].client.tweets[0]
+    assert toot == ("This is a photo update with 2 photos.", [1, 2])
+
+
+def _patched_media_callback(self, tmpfile, mt):
+    return self.client.UploadMediaChunked(tmpfile)
+
+
+@pytest.fixture(scope='session')
+def tweetmock():
+    from silorider.silos.twitter import TwitterSilo
+    TwitterSilo._CLIENT_CLASS = TwitterMock
+    return TwitterMockUtil()
+
+
+class TwitterMock:
+    def __init__(self, consumer_key, consumer_secret,
+                 access_token_key, access_token_secret):
+        assert consumer_key == 'TEST_CLIENT_KEY'
+        assert consumer_secret == 'TEST_CLIENT_SECRET'
+        assert access_token_key == 'TEST_ACCESS_KEY'
+        assert access_token_secret == 'TEST_ACCESS_SECRET'
+
+        self.tweets = []
+        self.media = []
+        self.next_mid = 1
+
+    def PostUpdate(self, tweet, media=None):
+        self.tweets.append((tweet, media))
+
+    def UploadMediaChunked(self, filename):
+        mid = self.next_mid
+        self.next_mid += 1
+        self.media.append((filename, mid))
+        return mid
+
+
+class TwitterMockUtil:
+    def installTokens(self, cli, silo_name):
+        def do_install_tokens(ctx):
+            ctx.cache.setCustomValue(
+                '%s_clienttoken' % silo_name,
+                'TEST_CLIENT_KEY,TEST_CLIENT_SECRET')
+            ctx.cache.setCustomValue(
+                '%s_accesstoken' % silo_name,
+                'TEST_ACCESS_KEY,TEST_ACCESS_SECRET')
+
+        cli.preExecHook(do_install_tokens)