livecheck: expand #preprocess_url tests more

Library/Homebrew/test/livecheck/livecheck_spec.rb

@@ -156,6 +156,12 @@ describe Homebrew::Livecheck do
   describe "::preprocess_url" do
     let(:github_git_url_with_extension) { "https://github.com/Homebrew/brew.git" }
 
+    it "returns the unmodified URL for an unparseable URL" do
+      # Modeled after the `head` URL in the `ncp` formula
+      expect(livecheck.preprocess_url(":something:cvs:@cvs.brew.sh:/cvs"))
+        .to eq(":something:cvs:@cvs.brew.sh:/cvs")
+    end
+
     it "returns the unmodified URL for a GitHub URL ending in .git" do
       expect(livecheck.preprocess_url(github_git_url_with_extension))
         .to eq(github_git_url_with_extension)
@@ -225,5 +231,10 @@ describe Homebrew::Livecheck do
       expect(livecheck.preprocess_url("https://lolg.it/Homebrew/brew/archive/brew-1.0.0.tar.gz"))
         .to eq("https://lolg.it/Homebrew/brew.git")
     end
+
+    it "returns the Git repository URL for a sourcehut archive URL" do
+      expect(livecheck.preprocess_url("https://git.sr.ht/~Homebrew/brew/archive/1.0.0.tar.gz"))
+        .to eq("https://git.sr.ht/~Homebrew/brew")
+    end
   end
 end