Add test for Tap#custom_remote?.

Library/Homebrew/test/tap_spec.rb

@@ -258,6 +258,37 @@ def setup_completion(link:)
  end
  end
 
+ describe "#custom_remote?" do
+ subject(:tap) { described_class.new("Homebrew", "services") }
+
+ let(:remote) { nil }
+
+ before do
+ tap.path.mkpath
+ system "git", "-C", tap.path, "init"
+ system "git", "-C", tap.path, "remote", "add", "origin", remote if remote
+ end
+
+ context "if no remote is available" do
+ it "returns true" do
+ expect(tap.remote).to be_nil
+ expect(tap.custom_remote?).to be true
+ end
+ end
+
+ context "when using the default remote" do
+ let(:remote) { "https://github.com/Homebrew/homebrew-services" }
+
+ its(:custom_remote?) { is_expected.to be false }
+ end
+
+ context "when using a non-default remote" do
+ let(:remote) { "[email protected]:Homebrew/homebrew-services" }
+
+ its(:custom_remote?) { is_expected.to be true }
+ end
+ end
+
  specify "Git variant" do
  touch path/"README"
  setup_git_repo