1 files changed, 297 insertions, 0 deletions
diff --git a/tool/test/test_sync_default_gems.rb b/tool/test/test_sync_default_gems.rb
new file mode 100755
index 0000000000..e64c6c6fda
--- /dev/null
+++ b/tool/test/test_sync_default_gems.rb
@@ -0,0 +1,297 @@
+#!/usr/bin/ruby
+require 'test/unit'
+require 'stringio'
+require 'tmpdir'
+require_relative '../sync_default_gems'
+
+module Test_SyncDefaultGems
+  class TestMessageFilter < Test::Unit::TestCase
+    def assert_message_filter(expected, trailers, input, repo = "ruby/test", sha = "0123456789")
+      subject, *expected = expected
+      expected = [
+        "[#{repo}] #{subject}\n",
+        *expected.map {_1+"\n"},
+        "\n",
+        "https://github.com/#{repo}/commit/#{sha[0, 10]}\n",
+      ]
+      if trailers
+        expected << "\n"
+        expected.concat(trailers.map {_1+"\n"})
+      end
+
+      out, err = capture_output do
+        SyncDefaultGems.message_filter(repo, sha, input: StringIO.new(input, "r"))
+      end
+
+      all_assertions do |a|
+        a.for("error") {assert_empty err}
+        a.for("result") {assert_pattern_list(expected, out)}
+      end
+    end
+
+    def test_subject_only
+      expected = [
+        "initial commit",
+      ]
+      assert_message_filter(expected, nil, "initial commit")
+    end
+
+    def test_link_in_parenthesis
+      expected = [
+        "fix (https://github.com/ruby/test/pull/1)",
+      ]
+      assert_message_filter(expected, nil, "fix (#1)")
+    end
+
+    def test_co_authored_by
+      expected = [
+        "commit something",
+      ]
+      trailers = [
+        "Co-Authored-By: git <git@ruby-lang.org>",
+      ]
+      assert_message_filter(expected, trailers, [expected, "", trailers, ""].join("\n"))
+    end
+
+    def test_multiple_co_authored_by
+      expected = [
+        "many commits",
+      ]
+      trailers = [
+        "Co-authored-by: git <git@ruby-lang.org>",
+        "Co-authored-by: svn <svn@ruby-lang.org>",
+      ]
+      assert_message_filter(expected, trailers, [expected, "", trailers, ""].join("\n"))
+    end
+
+    def test_co_authored_by_no_newline
+      expected = [
+        "commit something",
+      ]
+      trailers = [
+        "Co-Authored-By: git <git@ruby-lang.org>",
+      ]
+      assert_message_filter(expected, trailers, [expected, "", trailers].join("\n"))
+    end
+
+    def test_dot_ending_subject
+      expected = [
+        "subject with a dot.",
+        "",
+        "- next body line",
+      ]
+      assert_message_filter(expected, nil, [expected[0], expected[2], ""].join("\n"))
+    end
+  end
+
+  class TestSyncWithCommits < Test::Unit::TestCase
+    def setup
+      super
+      @target = nil
+      pend "No git" unless system("git --version", out: IO::NULL)
+      @testdir = Dir.mktmpdir("sync")
+      @git_config = %W"HOME GIT_CONFIG_GLOBAL".each_with_object({}) {|k, c| c[k] = ENV[k]}
+      ENV["HOME"] = @testdir
+      ENV["GIT_CONFIG_GLOBAL"] = @testdir + "/gitconfig"
+      git(*%W"config --global user.email test@ruby-lang.org")
+      git(*%W"config --global user.name", "Ruby")
+      git(*%W"config --global init.defaultBranch default")
+      @target = "sync-test"
+      SyncDefaultGems::REPOSITORIES[@target] = ["ruby/#{@target}", "default"]
+      @sha = {}
+      @origdir = Dir.pwd
+      Dir.chdir(@testdir)
+      ["src", @target].each do |dir|
+        git(*%W"init -q #{dir}")
+        File.write("#{dir}/.gitignore", "*~\n")
+        Dir.mkdir("#{dir}/lib")
+        File.write("#{dir}/lib/common.rb", ":ok\n")
+        Dir.mkdir("#{dir}/.github")
+        Dir.mkdir("#{dir}/.github/workflows")
+        File.write("#{dir}/.github/workflows/default.yml", "default:\n")
+        git(*%W"add .gitignore lib/common.rb .github", chdir: dir)
+        git(*%W"commit -q -m", "Initialize", chdir: dir)
+        if dir == "src"
+          File.write("#{dir}/lib/fine.rb", "return\n")
+          Dir.mkdir("#{dir}/test")
+          File.write("#{dir}/test/test_fine.rb", "return\n")
+          git(*%W"add lib/fine.rb test/test_fine.rb", chdir: dir)
+          git(*%W"commit -q -m", "Looks fine", chdir: dir)
+        end
+        Dir.mkdir("#{dir}/tool")
+        File.write("#{dir}/tool/ok", "#!/bin/sh\n""echo ok\n")
+        git(*%W"add tool/ok", chdir: dir)
+        git(*%W"commit -q -m", "Add tool #{dir}", chdir: dir)
+        @sha[dir] = top_commit(dir)
+      end
+      git(*%W"remote add #{@target} ../#{@target}", chdir: "src")
+    end
+
+    def teardown
+      if @target
+        Dir.chdir(@origdir)
+        SyncDefaultGems::REPOSITORIES.delete(@target)
+        ENV.update(@git_config)
+        FileUtils.rm_rf(@testdir)
+      end
+      super
+    end
+
+    def capture_process_output_to(outputs)
+      return yield unless outputs&.empty? == false
+      IO.pipe do |r, w|
+        orig = outputs.map {|out| out.dup}
+        outputs.each {|out| out.reopen(w)}
+        w.close
+        reader = Thread.start {r.read}
+        yield
+      ensure
+        outputs.each {|out| o = orig.shift; out.reopen(o); o.close}
+        return reader.value
+      end
+    end
+
+    def capture_process_outputs
+      out = err = nil
+      synchronize do
+        out = capture_process_output_to(STDOUT) do
+          err = capture_process_output_to(STDERR) do
+            yield
+          end
+        end
+      end
+      return out, err
+    end
+
+    def git(*commands, **opts)
+      system("git", *commands, exception: true, **opts)
+    end
+
+    def top_commit(dir, format: "%H")
+      IO.popen(%W[git log --format=#{format} -1], chdir: dir, &:read)&.chomp
+    end
+
+    def assert_sync(commits = true, success: true, editor: nil)
+      result = nil
+      out = capture_process_output_to([STDOUT, STDERR]) do
+        Dir.chdir("src") do
+          orig_editor = ENV["GIT_EDITOR"]
+          ENV["GIT_EDITOR"] = editor || 'false'
+          edit = true if editor
+
+          result = SyncDefaultGems.sync_default_gems_with_commits(@target, commits, edit: edit)
+        ensure
+          ENV["GIT_EDITOR"] = orig_editor
+        end
+      end
+      assert_equal(success, result, out)
+      out
+    end
+
+    def test_sync
+      File.write("#@target/lib/common.rb", "# OK!\n")
+      git(*%W"commit -q -m", "OK", "lib/common.rb", chdir: @target)
+      out = assert_sync()
+      assert_not_equal(@sha["src"], top_commit("src"), out)
+      assert_equal("# OK!\n", File.read("src/lib/common.rb"))
+      log = top_commit("src", format: "%B").lines
+      assert_equal("[ruby/#@target] OK\n", log.first, out)
+      assert_match(%r[/ruby/#{@target}/commit/\h+$], log.last, out)
+      assert_operator(top_commit(@target), :start_with?, log.last[/\h+$/], out)
+    end
+
+    def test_skip_tool
+      git(*%W"rm -q tool/ok", chdir: @target)
+      git(*%W"commit -q -m", "Remove tool", chdir: @target)
+      out = assert_sync()
+      assert_equal(@sha["src"], top_commit("src"), out)
+    end
+
+    def test_skip_test_fixtures
+      Dir.mkdir("#@target/test")
+      Dir.mkdir("#@target/test/fixtures")
+      File.write("#@target/test/fixtures/fixme.rb", "")
+      git(*%W"add test/fixtures/fixme.rb", chdir: @target)
+      git(*%W"commit -q -m", "Add fixtures", chdir: @target)
+      out = assert_sync(["#{@sha[@target]}..#{@target}/default"])
+      assert_equal(@sha["src"], top_commit("src"), out)
+    end
+
+    def test_skip_toplevel
+      Dir.mkdir("#@target/docs")
+      File.write("#@target/docs/NEWS.md", "= NEWS!!!\n")
+      git(*%W"add --", "docs/NEWS.md", chdir: @target)
+      File.write("#@target/docs/hello.md", "Hello\n")
+      git(*%W"add --", "docs/hello.md", chdir: @target)
+      git(*%W"commit -q -m", "It's a news", chdir: @target)
+      out = assert_sync()
+      assert_equal(@sha["src"], top_commit("src"), out)
+    end
+
+    def test_adding_toplevel
+      Dir.mkdir("#@target/docs")
+      File.write("#@target/docs/NEWS.md", "= New library\n")
+      File.write("#@target/lib/news.rb", "return\n")
+      git(*%W"add --", "docs/NEWS.md", "lib/news.rb", chdir: @target)
+      git(*%W"commit -q -m", "New lib", chdir: @target)
+      out = assert_sync()
+      assert_not_equal(@sha["src"], top_commit("src"), out)
+      assert_equal "return\n", File.read("src/lib/news.rb")
+      assert_include top_commit("src", format: "oneline"), "[ruby/#{@target}] New lib"
+      assert_not_operator File, :exist?, "src/docs"
+    end
+
+    def test_gitignore
+      File.write("#@target/.gitignore", "*.bak\n", mode: "a")
+      File.write("#@target/lib/common.rb", "Should.be_merged\n", mode: "a")
+      File.write("#@target/.github/workflows/main.yml", "# Should not merge\n", mode: "a")
+      git(*%W"add .github", chdir: @target)
+      git(*%W"commit -q -m", "Should be common.rb only",
+          *%W".gitignore lib/common.rb .github", chdir: @target)
+      out = assert_sync()
+      assert_not_equal(@sha["src"], top_commit("src"), out)
+      assert_equal("*~\n", File.read("src/.gitignore"), out)
+      assert_equal("#!/bin/sh\n""echo ok\n", File.read("src/tool/ok"), out)
+      assert_equal(":ok\n""Should.be_merged\n", File.read("src/lib/common.rb"), out)
+      assert_not_operator(File, :exist?, "src/.github/workflows/main.yml", out)
+    end
+
+    def test_gitignore_after_conflict
+      File.write("src/Gemfile", "# main\n")
+      git(*%W"add Gemfile", chdir: "src")
+      git(*%W"commit -q -m", "Add Gemfile", chdir: "src")
+      File.write("#@target/Gemfile", "# conflict\n", mode: "a")
+      File.write("#@target/lib/common.rb", "Should.be_merged\n", mode: "a")
+      File.write("#@target/.github/workflows/main.yml", "# Should not merge\n", mode: "a")
+      git(*%W"add Gemfile .github lib/common.rb", chdir: @target)
+      git(*%W"commit -q -m", "Should be common.rb only", chdir: @target)
+      out = assert_sync()
+      assert_not_equal(@sha["src"], top_commit("src"), out)
+      assert_equal("# main\n", File.read("src/Gemfile"), out)
+      assert_equal(":ok\n""Should.be_merged\n", File.read("src/lib/common.rb"), out)
+      assert_not_operator(File, :exist?, "src/.github/workflows/main.yml", out)
+    end
+
+    def test_delete_after_conflict
+      File.write("#@target/lib/bad.rb", "raise\n")
+      git(*%W"add lib/bad.rb", chdir: @target)
+      git(*%W"commit -q -m", "Add bad.rb", chdir: @target)
+      out = assert_sync
+      assert_equal("raise\n", File.read("src/lib/bad.rb"))
+
+      git(*%W"rm lib/bad.rb", chdir: "src", out: IO::NULL)
+      git(*%W"commit -q -m", "Remove bad.rb", chdir: "src")
+
+      File.write("#@target/lib/bad.rb", "raise 'bar'\n")
+      File.write("#@target/lib/common.rb", "Should.be_merged\n", mode: "a")
+      git(*%W"add lib/bad.rb lib/common.rb", chdir: @target)
+      git(*%W"commit -q -m", "Add conflict", chdir: @target)
+
+      head = top_commit("src")
+      out = assert_sync(editor: "git rm -f lib/bad.rb")
+      assert_not_equal(head, top_commit("src"))
+      assert_equal(":ok\n""Should.be_merged\n", File.read("src/lib/common.rb"), out)
+      assert_not_operator(File, :exist?, "src/lib/bad.rb", out)
+    end
+  end
+end