Add local SEA download tests

Author: monadoid

test/stagehand/local_binary_test.rb

@@ -0,0 +1,81 @@
+# frozen_string_literal: true
+
+require_relative "test_helper"
+
+class Stagehand::LocalBinaryTest < Minitest::Test
+  include WebMock::API
+
+  @mutex = Mutex.new
+
+  def self.mutex
+    @mutex
+  end
+
+  def setup
+    super
+    @tmp_home = Dir.mktmpdir
+    @old_home = ENV["HOME"]
+    @old_xdg = ENV["XDG_CACHE_HOME"]
+    @old_local = ENV["LOCALAPPDATA"]
+    ENV["HOME"] = @tmp_home
+    ENV.delete("XDG_CACHE_HOME")
+    ENV.delete("LOCALAPPDATA")
+    ENV.delete("STAGEHAND_SERVER_VERSION")
+    WebMock.enable!
+    WebMock.disable_net_connect!(allow_localhost: true)
+  end
+
+  def teardown
+    ENV["HOME"] = @old_home
+    ENV["XDG_CACHE_HOME"] = @old_xdg
+    ENV["LOCALAPPDATA"] = @old_local
+    FileUtils.remove_entry(@tmp_home) if @tmp_home && File.directory?(@tmp_home)
+    WebMock.reset!
+    WebMock.allow_net_connect!
+    super
+  end
+
+  def around
+    self.class.mutex.synchronize { super }
+  end
+
+  def test_uses_cache_without_network
+    cache_dir = Stagehand::Local::Binary.cache_dir
+    filename = Stagehand::Local::Binary.binary_filename
+    FileUtils.mkdir_p(cache_dir)
+    cache_path = File.join(cache_dir, filename)
+    File.binwrite(cache_path, "cached")
+
+    path = Stagehand::Local::Binary.resolve_binary_path
+    assert_equal cache_path, path
+  end
+
+  def test_downloads_latest_tag_when_missing
+    filename = Stagehand::Local::Binary.binary_filename
+
+    stub_request(:get, "https://api.github.com/repos/browserbase/stagehand/releases?per_page=15")
+      .to_return(status: 200, body: [{ tag_name: "stagehand-server/v9.9.9" }].to_json)
+
+    stub_request(:get, "https://github.com/browserbase/stagehand/releases/download/stagehand-server/v9.9.9/#{filename}")
+      .to_return(status: 200, body: "binary")
+
+    path = Stagehand::Local::Binary.resolve_binary_path
+
+    assert File.exist?(path)
+    assert_equal "binary", File.binread(path)
+  end
+
+  def test_download_error_includes_manual_hint
+    filename = Stagehand::Local::Binary.binary_filename
+
+    stub_request(:get, "https://api.github.com/repos/browserbase/stagehand/releases?per_page=15")
+      .to_return(status: 200, body: [{ tag_name: "stagehand-server/v1.2.3" }].to_json)
+
+    stub_request(:get, "https://github.com/browserbase/stagehand/releases/download/stagehand-server/v1.2.3/#{filename}")
+      .to_return(status: 404, body: "not found")
+
+    err = assert_raises(RuntimeError) { Stagehand::Local::Binary.resolve_binary_path }
+    assert_includes err.message, "Failed to download Stagehand driver binary"
+    assert_includes err.message, filename
+  end
+end