holman · June 18, 2020 01:27 · Jan 17, 2015 · Jan 17, 2015
diff --git a/emoji_test.rb b/emoji_test.rb
@@ -0,0 +1,14 @@
+require_relative "test_helper"
+
+require "open-uri"
+require "net/http"
+
+class EmojiTest < Blog::Test
+  def test_no_emoji
+    posts.each do |post|
+      content = File.read(post)
+      refute_match /:[a-zA-Z0-9_]+:/, content,
+        "You have emoji in your post, which we try to avoid"
+    end
+  end
+end
diff --git a/images_test.rb b/images_test.rb
@@ -0,0 +1,65 @@
+require_relative "test_helper"
+
+require "open-uri"
+require "net/http"
+
+class ImagesTest < Blog::Test
+  def setup
+    @images = posts.map do |post|
+      content = File.read(post)
+      md      = Redcarpet::Markdown.new(Redcarpet::Render::HTML, autolink: true, tables: true)
+      html    = md.render(content)
+      doc     = Nokogiri::HTML(html)
+
+      doc.css("img").map do |img|
+        url      = img.attribute("src").value
+        uri      = URI(url)
+        response = Net::HTTP.get_response(uri)
+
+        { :url => url, :response => response, :element => img }
+      end
+    end.flatten
+  end
+
+  def test_images_arent_too_big
+    large_images = @images.select { |img| img[:response].body.size.to_i > 1_000_000 }
+
+    error_message = large_images.map do |img|
+      "  #{img[:response].body.size} bytes: #{img[:url]}"
+    end.join("\n")
+
+    assert large_images.empty?,
+      "The following images are over a megabyte in size... consider shrinking them:\n\n#{error_message}"
+  end
+
+  def test_images_have_alt_tags
+    @images.select do |img|
+      alt = img[:element].attribute("alt").value
+      no_alt_tags = (alt.strip == "" || (alt =~ /^screen shot /))
+
+      refute no_alt_tags,
+        "Images need an alt tag for accessibility. Your image should have a short, one or two word description of the image in the ![] parts of your post."
+    end
+  end
+
+  def test_images_are_dotcom_hosted
+    @images.select do |img|
+      url = img[:url]
+
+      assert_match /^https:\/\/cloud\.githubusercontent\.com/, url,
+        "Images should be hosted on GitHub. Try dragging an image into an issue comment, uploading it, and using that URL."
+    end
+  end
+
+  def test_image_proportions
+    @images.select do |img|
+      width, height = FastImage.size(img[:url])
+
+      assert width >= 1354,
+        "Screenshots should be retina-quality — meaning at least 1354 pixels across — so they look good on higher-resolution screens. If you're taking a shot of a small interface element, consider zooming the page with cmd+plus and taking a screenshot that way; the blog will scale it down for you."
+
+      assert (width/height.to_f) > 1.2,
+        "Screenshots should be roughly panoramic (more than a 1.2 width:height ratio). Try taking a wider, shorter screenshot so it reduces the amount of scoll necessary to view the content of the blog post."
+    end
+  end
+end
diff --git a/test_helper.rb b/test_helper.rb
@@ -0,0 +1,71 @@
+require "fileutils"
+
+require "rubygems"
+require "bundler/setup"
+require "minitest/autorun"
+require "fastimage"
+require "nokogiri"
+require "redcarpet"
+
+cat = <<-'cat'
+
+
+
+                                                   .--.
+                                                   `.  \
+                                                     \  \
+                                                      .  \
+                                                      :   .
+                                                      |    .
+                                                      |    :
+                                                      |    |
+      ..._  ___                                       |    |
+     `."".`''''""--..___                              |    |
+     ,-\  \             ""-...__         _____________/    |
+     / ` " '                    `""""""""                  .
+     \                                                      L
+     (>                                                      \
+    /                                                         \
+    \_    ___..---.                                            L
+      `--'         '.                                           \
+                     .                                           \_
+                    _/`.                                           `.._
+                 .'     -.                                             `.
+                /     __.-Y     /''''''-...___,...--------.._            |
+               /   _."    |    /                ' .      \   '---..._    |
+              /   /      /    /                _,. '    ,/           |   |
+              \_,'     _.'   /              /''     _,-'            _|   |
+                      '     /               `-----''               /     |
+                      `...-'                                       !_____)
+
+
+cat
+
+puts cat
+puts "
+  Hello you lovely GitHub blog author person human!
+  This is test output from your blog post you just wrote. Unlike most tests in
+  life (and code!), it's *totally cool* to fail these tests. They're just here
+  to catch anything you might have missed while writing your draft.
+  Consider them suggestions rather than things you *need* to do before
+  publishing your post.
+  Happy shipping!
+"
+
+module Blog
+  class Test < MiniTest::Test
+    # All the posts we're interested in checking. This means we're looking at
+    # files that have changed on this particular branch we're on.
+    #
+    # Returns an Array of String filenames.
+    def posts
+      diffable_files = `git diff --name-only --diff-filter=ACMRTUXB origin/master... | grep .md`.split("\n")
+
+      posts = diffable_files.select do |filename|
+        File.ctime(filename) > Time.new(2014,9,3)
+      end
+
+      posts
+    end
+  end
+end
diff --git a/today_test.rb b/today_test.rb
@@ -0,0 +1,15 @@
+require_relative "test_helper"
+
+class TodayTest < Blog::Test
+  def test_doesnt_start_with_today
+    posts.each do |post|
+      content = File.read(post)
+
+      body_text = content.split("\n").delete_if do |line|
+        line[0] == "#" || line.strip == ""
+      end
+
+      refute body_text.first =~ /Today/, "Posts usually shouldn't start with \"Today\""
+    end
+  end
+end