Sparkle: Expand tests

Library/Homebrew/livecheck/strategy/sparkle.rb

@@ -81,7 +81,6 @@ module Homebrew
 
           items.max_by(&:bundle_version)
         end
-        private_class_method :item_from_content
 
         # Checks the content at the URL for new versions.
         sig { params(url: String, regex: T.nilable(Regexp)).returns(T::Hash[Symbol, T.untyped]) }

Library/Homebrew/test/livecheck/strategy/sparkle_spec.rb

@@ -8,9 +8,67 @@ describe Homebrew::Livecheck::Strategy::Sparkle do
 
   let(:url) { "https://www.example.com/example/appcast.xml" }
 
+  let(:appcast_data) {
+    {
+      title:          "Version 1.2.3",
+      url:            "https://www.example.com/example/example.tar.gz",
+      bundle_version: Homebrew::BundleVersion.new("1.2.3", "1234"),
+      short_version:  "1.2.3",
+      version:        "1234",
+    }
+  }
+
+  let(:appcast_item) {
+    Homebrew::Livecheck::Strategy::Sparkle::Item.new(
+      {
+        title:          appcast_data[:title],
+        url:            appcast_data[:url],
+        bundle_version: appcast_data[:bundle_version],
+        short_version:  appcast_data[:bundle_version]&.short_version,
+        version:        appcast_data[:bundle_version]&.version,
+      },
+    )
+  }
+
+  let(:appcast_xml) {
+    <<~EOS
+      <?xml version="1.0" encoding="utf-8"?>
+      <rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:sparkle="http://www.andymatuschak.org/xml-namespaces/sparkle">
+        <channel>
+          <title>Example Changelog</title>
+          <link>#{url}</link>
+          <description>Most recent changes with links to updates.</description>
+          <language>en</language>
+          <item>
+            <title>#{appcast_data[:title]}</title>
+            <sparkle:minimumSystemVersion>10.10</sparkle:minimumSystemVersion>
+            <sparkle:releaseNotesLink>https://www.example.com/example/1.2.3.html</sparkle:releaseNotesLink>
+            <enclosure url="#{appcast_data[:url]}" sparkle:shortVersionString="#{appcast_data[:short_version]}" sparkle:version="#{appcast_data[:version]}" length="12345678" type="application/octet-stream" sparkle:dsaSignature="ABCDEF+GHIJKLMNOPQRSTUVWXYZab/cdefghijklmnopqrst/uvwxyz1234567==" />
+          </item>
+        </channel>
+      </rss>
+    EOS
+  }
+
   describe "::match?" do
     it "returns true for any URL" do
       expect(sparkle.match?(url)).to be true
     end
   end
+
+  describe "::item_from_content" do
+    let(:item_from_appcast_xml) { sparkle.item_from_content(appcast_xml) }
+
+    it "returns nil if content is blank" do
+      expect(sparkle.item_from_content("")).to be nil
+    end
+
+    it "returns an Item when given XML data" do
+      expect(item_from_appcast_xml).to be_a(Homebrew::Livecheck::Strategy::Sparkle::Item)
+      expect(item_from_appcast_xml.title).to eq(appcast_item.title)
+      expect(item_from_appcast_xml.url).to eq(appcast_item.url)
+      expect(item_from_appcast_xml.bundle_version.short_version).to eq(appcast_item.bundle_version.short_version)
+      expect(item_from_appcast_xml.bundle_version.version).to eq(appcast_item.bundle_version.version)
+    end
+  end
 end