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require File.expand_path(File.join(File.dirname(__FILE__), 'helper'))
class MiddlewareStackTest < Faraday::TestCase
# mock handler classes
class Handler < Struct.new(:app)
def call(env)
(env[:request_headers]['X-Middleware'] ||= '') << ":#{self.class.name.split('::').last}"
app.call(env)
end
end
class Apple < Handler; end
class Orange < Handler; end
class Banana < Handler; end
class Broken < Faraday::Middleware
dependency 'zomg/i_dont/exist'
end
def setup
@conn = Faraday::Connection.new
@builder = @conn.builder
end
def test_sets_default_adapter_if_none_set
default_middleware = Faraday::Request.lookup_middleware :url_encoded
default_adapter_klass = Faraday::Adapter.lookup_middleware Faraday.default_adapter
assert @builder[0] == default_middleware
assert @builder[1] == default_adapter_klass
end
def test_allows_rebuilding
build_stack Apple
build_stack Orange
assert_handlers %w[Orange]
end
def test_allows_extending
build_stack Apple
@conn.use Orange
assert_handlers %w[Apple Orange]
end
def test_builder_is_passed_to_new_faraday_connection
new_conn = Faraday::Connection.new :builder => @builder
assert_equal @builder, new_conn.builder
end
def test_insert_before
build_stack Apple, Orange
@builder.insert_before Apple, Banana
assert_handlers %w[Banana Apple Orange]
end
def test_insert_after
build_stack Apple, Orange
@builder.insert_after Apple, Banana
assert_handlers %w[Apple Banana Orange]
end
def test_swap_handlers
build_stack Apple, Orange
@builder.swap Apple, Banana
assert_handlers %w[Banana Orange]
end
def test_delete_handler
build_stack Apple, Orange
@builder.delete Apple
assert_handlers %w[Orange]
end
def test_stack_is_locked_after_making_requests
build_stack Apple
assert !@builder.locked?
@conn.get('/')
assert @builder.locked?
assert_raises Faraday::Builder::StackLocked do
@conn.use Orange
end
end
def test_duped_stack_is_unlocked
build_stack Apple
assert !@builder.locked?
@builder.lock!
assert @builder.locked?
duped_connection = @conn.dup
assert_equal @builder, duped_connection.builder
assert !duped_connection.builder.locked?
end
def test_handler_comparison
build_stack Apple
assert_equal @builder.handlers.first, Apple
assert_equal @builder.handlers[0,1], [Apple]
assert_equal @builder.handlers.first, Faraday::Builder::Handler.new(Apple)
end
def test_unregistered_symbol
err = assert_raise(RuntimeError) { build_stack :apple }
assert_equal ":apple is not registered on Faraday::Middleware", err.message
end
def test_registered_symbol
Faraday.register_middleware :apple => Apple
begin
build_stack :apple
assert_handlers %w[Apple]
ensure
unregister_middleware Faraday::Middleware, :apple
end
end
def test_registered_symbol_with_proc
Faraday.register_middleware :apple => lambda { Apple }
begin
build_stack :apple
assert_handlers %w[Apple]
ensure
unregister_middleware Faraday::Middleware, :apple
end
end
def test_registered_symbol_with_type
Faraday.register_middleware :request, :orange => Orange
begin
build_stack {|b| b.request :orange }
assert_handlers %w[Orange]
ensure
unregister_middleware Faraday::Request, :orange
end
end
def test_missing_dependencies
build_stack Broken
err = assert_raises RuntimeError do
@conn.get('/')
end
assert_match "missing dependency for MiddlewareStackTest::Broken: ", err.message
assert_match "zomg/i_dont/exist", err.message
end
private
# make a stack with test adapter that reflects the order of middleware
def build_stack(*handlers)
@builder.build do |b|
handlers.each { |handler| b.use(*handler) }
yield b if block_given?
b.adapter :test do |stub|
stub.get '/' do |env|
# echo the "X-Middleware" request header in the body
[200, {}, env[:request_headers]['X-Middleware'].to_s]
end
end
end
end
def assert_handlers(list)
echoed_list = @conn.get('/').body.to_s.split(':')
echoed_list.shift if echoed_list.first == ''
assert_equal list, echoed_list
end
def unregister_middleware(component, key)
# TODO: unregister API?
component.instance_variable_get('@registered_middleware').delete(key)
end
end
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