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require 'abstract_unit'
require 'stringio'
require 'logger'
class FailsafeTest < ActionController::TestCase
FIXTURE_PUBLIC = "#{File.dirname(__FILE__)}/../fixtures/failsafe".freeze
def setup
@old_error_file_path = ActionController::Failsafe.error_file_path
ActionController::Failsafe.error_file_path = FIXTURE_PUBLIC
@app = mock
@log_io = StringIO.new
@logger = Logger.new(@log_io)
@failsafe = ActionController::Failsafe.new(@app)
@failsafe.stubs(:failsafe_logger).returns(@logger)
end
def teardown
ActionController::Failsafe.error_file_path = @old_error_file_path
end
def app_will_raise_error!
@app.expects(:call).then.raises(RuntimeError.new("Printer on fire"))
end
def test_calls_app_and_returns_its_return_value
@app.expects(:call).returns([200, { "Content-Type" => "text/html" }, "ok"])
assert_equal [200, { "Content-Type" => "text/html" }, "ok"], @failsafe.call({})
end
def test_writes_to_log_file_on_exception
app_will_raise_error!
@failsafe.call({})
assert_match /Printer on fire/, @log_io.string # Logs exception message.
assert_match /failsafe_test\.rb/, @log_io.string # Logs backtrace.
end
def test_returns_500_internal_server_error_on_exception
app_will_raise_error!
response = @failsafe.call({})
assert_equal 3, response.size # It is a valid Rack response.
assert_equal 500, response[0] # Status is 500.
end
def test_renders_error_page_file_with_erb
app_will_raise_error!
response = @failsafe.call({})
assert_equal 500, response[0]
assert_equal "hello my world", response[2].join
end
def test_returns_a_default_message_if_erb_rendering_failed
app_will_raise_error!
@failsafe.expects(:render_template).raises(RuntimeError.new("Harddisk is crashing"))
response = @failsafe.call({})
assert_equal 500, response[0]
assert_match /500 Internal Server Error/, response[2].join
assert_match %r(please read this web application's log file), response[2].join
end
end
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