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test.rb
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test.rb
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# frozen_string_literal: true
module Faraday
class Adapter
# Examples
#
# test = Faraday::Connection.new do
# use Faraday::Adapter::Test do |stub|
# # simply define matcher to match the request
# stub.get '/resource.json' do
# # return static content
# [200, {'Content-Type' => 'application/json'}, 'hi world']
# end
#
# # response with content generated based on request
# stub.get '/showget' do |env|
# [200, {'Content-Type' => 'text/plain'}, env[:method].to_s]
# end
#
# # regular expression can be used as matching filter
# stub.get /\A\/items\/(\d+)\z/ do |env, meta|
# # in case regular expression is used an instance of MatchData can be received
# [200, {'Content-Type' => 'text/plain'}, "showing item: #{meta[:match_data][1]}"]
# end
# end
# end
#
# resp = test.get '/resource.json'
# resp.body # => 'hi world'
#
# resp = test.get '/showget'
# resp.body # => 'get'
#
# resp = test.get '/items/1'
# resp.body # => 'showing item: 1'
#
# resp = test.get '/items/2'
# resp.body # => 'showing item: 2'
#
class Test < Faraday::Adapter
attr_accessor :stubs
class Stubs
class NotFound < StandardError
end
def initialize
# { get: [Stub, Stub] }
@stack, @consumed = {}, {}
yield(self) if block_given?
end
def empty?
@stack.empty?
end
def match(request_method, host, path, headers, body)
return false unless @stack.key?(request_method)
stack = @stack[request_method]
consumed = (@consumed[request_method] ||= [])
stub, meta = matches?(stack, host, path, headers, body)
if stub
consumed << stack.delete(stub)
return stub, meta
end
matches?(consumed, host, path, headers, body)
end
def get(path, headers = {}, &block)
new_stub(:get, path, headers, &block)
end
def head(path, headers = {}, &block)
new_stub(:head, path, headers, &block)
end
def post(path, body = nil, headers = {}, &block)
new_stub(:post, path, headers, body, &block)
end
def put(path, body = nil, headers = {}, &block)
new_stub(:put, path, headers, body, &block)
end
def patch(path, body = nil, headers = {}, &block)
new_stub(:patch, path, headers, body, &block)
end
def delete(path, headers = {}, &block)
new_stub(:delete, path, headers, &block)
end
def options(path, headers = {}, &block)
new_stub(:options, path, headers, &block)
end
# Raises an error if any of the stubbed calls have not been made.
def verify_stubbed_calls
failed_stubs = []
@stack.each do |method, stubs|
next if stubs.empty?
failed_stubs.concat(
stubs.map do |stub|
"Expected #{method} #{stub}."
end
)
end
raise failed_stubs.join(' ') unless failed_stubs.empty?
end
protected
def new_stub(request_method, path, headers = {}, body = nil, &block)
normalized_path, host =
if path.is_a?(Regexp)
path
else
[Faraday::Utils.normalize_path(path), Faraday::Utils.URI(path).host]
end
(@stack[request_method] ||= []) << Stub.new(host, normalized_path, headers, body, block)
end
def matches?(stack, host, path, headers, body)
stack.each do |stub|
match_result, meta = stub.matches?(host, path, headers, body)
return stub, meta if match_result
end
nil
end
end
# rubocop:disable Style/StructInheritance
class Stub < Struct.new(:host, :path, :params, :headers, :body, :block)
# rubocop:enable Style/StructInheritance
def initialize(host, full, headers, body, block)
path, query = full.respond_to?(:split) ? full.split('?') : full
params = query ?
Faraday::Utils.parse_nested_query(query) :
{}
super(host, path, params, headers, body, block)
end
def matches?(request_host, request_uri, request_headers, request_body)
request_path, request_query = request_uri.split('?')
request_params = request_query ?
Faraday::Utils.parse_nested_query(request_query) :
{}
# meta is a hash use as carrier
# that will be yielded to consumer block
meta = {}
[(host.nil? || host == request_host) &&
path_match?(request_path, meta) &&
params_match?(request_params) &&
(body.to_s.size.zero? || request_body == body) &&
headers_match?(request_headers), meta]
end
def path_match?(request_path, meta)
if path.is_a? Regexp
meta[:match_data] = path.match(request_path)
meta.key?(:match_data)
else
path == request_path
end
end
def params_match?(request_params)
params.keys.all? do |key|
request_params[key] == params[key]
end
end
def headers_match?(request_headers)
headers.keys.all? do |key|
request_headers[key] == headers[key]
end
end
def to_s
"#{path} #{body}"
end
end
def initialize(app, stubs = nil, &block)
super(app)
@stubs = stubs || Stubs.new
configure(&block) if block
end
def configure
yield(stubs)
end
def call(env)
super
host = env[:url].host
normalized_path = Faraday::Utils.normalize_path(env[:url])
params_encoder = env.request.params_encoder || Faraday::Utils.default_params_encoder
stub, meta = stubs.match(env[:method], host, normalized_path, env.request_headers, env[:body])
if stub
env[:params] = (query = env[:url].query) ?
params_encoder.decode(query) : {}
block_arity = stub.block.arity
status, headers, body = block_arity >= 0 ?
stub.block.call(*[env, meta].take(block_arity)) :
stub.block.call(env, meta)
save_response(env, status, body, headers)
else
raise Stubs::NotFound, "no stubbed request for #{env[:method]} #{normalized_path} #{env[:body]}"
end
@app.call(env)
end
end
end
end