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require "abstract_unit"
class ReloaderTest < ActiveSupport::TestCase
teardown do
ActiveSupport::Reloader.reset_callbacks :prepare
ActiveSupport::Reloader.reset_callbacks :complete
end
class MyBody < Array
def initialize(&block)
@on_close = block
end
def foo
"foo"
end
def bar
"bar"
end
def close
@on_close.call if @on_close
end
end
def test_prepare_callbacks
a = b = c = nil
reloader.to_prepare { |*args| a = b = c = 1 }
reloader.to_prepare { |*args| b = c = 2 }
reloader.to_prepare { |*args| c = 3 }
# Ensure to_prepare callbacks are not run when defined
assert_nil a || b || c
# Run callbacks
call_and_return_body
assert_equal 1, a
assert_equal 2, b
assert_equal 3, c
end
def test_returned_body_object_always_responds_to_close
body = call_and_return_body
assert_respond_to body, :close
end
def test_returned_body_object_always_responds_to_close_even_if_called_twice
body = call_and_return_body
assert_respond_to body, :close
body.close
body = call_and_return_body
assert_respond_to body, :close
body.close
end
def test_condition_specifies_when_to_reload
i, j = 0, 0, 0, 0
reloader = reloader(lambda { i < 3 })
reloader.to_prepare { |*args| i += 1 }
reloader.to_complete { |*args| j += 1 }
app = middleware(lambda { |env| [200, {}, []] }, reloader)
5.times do
resp = app.call({})
resp[2].close
end
assert_equal 3, i
assert_equal 3, j
end
def test_returned_body_object_behaves_like_underlying_object
body = call_and_return_body do
b = MyBody.new
b << "hello"
b << "world"
[200, { "Content-Type" => "text/html" }, b]
end
assert_equal 2, body.size
assert_equal "hello", body[0]
assert_equal "world", body[1]
assert_equal "foo", body.foo
assert_equal "bar", body.bar
end
def test_it_calls_close_on_underlying_object_when_close_is_called_on_body
close_called = false
body = call_and_return_body do
b = MyBody.new do
close_called = true
end
[200, { "Content-Type" => "text/html" }, b]
end
body.close
assert close_called
end
def test_returned_body_object_responds_to_all_methods_supported_by_underlying_object
body = call_and_return_body do
[200, { "Content-Type" => "text/html" }, MyBody.new]
end
assert_respond_to body, :size
assert_respond_to body, :each
assert_respond_to body, :foo
assert_respond_to body, :bar
end
def test_complete_callbacks_are_called_when_body_is_closed
completed = false
reloader.to_complete { completed = true }
body = call_and_return_body
assert !completed
body.close
assert completed
end
def test_prepare_callbacks_arent_called_when_body_is_closed
prepared = false
reloader.to_prepare { prepared = true }
body = call_and_return_body
prepared = false
body.close
assert !prepared
end
def test_complete_callbacks_are_called_on_exceptions
completed = false
reloader.to_complete { completed = true }
begin
call_and_return_body do
raise "error"
end
rescue
end
assert completed
end
private
def call_and_return_body(&block)
app = middleware(block || proc { [200, {}, "response"] })
_, _, body = app.call("rack.input" => StringIO.new(""))
body
end
def middleware(inner_app, reloader = reloader())
ActionDispatch::Reloader.new(inner_app, reloader)
end
def reloader(check = lambda { true })
@reloader ||= begin
reloader = Class.new(ActiveSupport::Reloader)
reloader.check = check
reloader
end
end
end
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