Ruby on rails Rspec can'；t运行：营救在连接'；：连接被拒绝：localhost:7475（法拉第：：ConnectionFailed）

我一直忽略了我的rspec测试，但我试图重新开始，现在我无法运行基本的rspec

rescue in connection_for': connection refused: localhost:7475 (Faraday::ConnectionFailed)
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/net-http-persistent-2.9.4/lib/net/http/persistent.rb:589:in `connection_for'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/net-http-persistent-2.9.4/lib/net/http/persistent.rb:994:in `request'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/faraday-0.9.0/lib/faraday/adapter/net_http_persistent.rb:25:in `perform_request'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/faraday-0.9.0/lib/faraday/adapter/net_http.rb:39:in `call'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/faraday_middleware-0.9.1/lib/faraday_middleware/response_middleware.rb:30:in `call'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/faraday_middleware-0.9.1/lib/faraday_middleware/request/encode_json.rb:23:in `call'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/faraday-0.9.0/lib/faraday/rack_builder.rb:139:in `build_response'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/faraday-0.9.0/lib/faraday/connection.rb:377:in `run_request'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/faraday-0.9.0/lib/faraday/connection.rb:140:in `get'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/neo4j-core-3.0.1/lib/neo4j-server/cypher_session.rb:41:in `open'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/neo4j-core-3.0.1/lib/neo4j-server/cypher_session.rb:5:in `block in <module:Server>'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/neo4j-core-3.0.1/lib/neo4j/session.rb:112:in `call'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/neo4j-core-3.0.1/lib/neo4j/session.rb:112:in `create_session'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/neo4j-core-3.0.1/lib/neo4j/session.rb:99:in `open'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/neo4j-3.0.1/lib/neo4j/railtie.rb:57:in `open_neo4j_session'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/neo4j-3.0.1/lib/neo4j/railtie.rb:73:in `block (2 levels) in <class:Railtie>'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/neo4j-3.0.1/lib/neo4j/railtie.rb:72:in `each'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/neo4j-3.0.1/lib/neo4j/railtie.rb:72:in `block in <class:Railtie>'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/railties-4.1.6/lib/rails/initializable.rb:30:in `instance_exec'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/railties-4.1.6/lib/rails/initializable.rb:30:in `run'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/railties-4.1.6/lib/rails/initializable.rb:55:in `block in run_initializers'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/2.1.0/tsort.rb:226:in `block in tsort_each'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/2.1.0/tsort.rb:348:in `block (2 levels) in each_strongly_connected_component'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/2.1.0/tsort.rb:427:in `each_strongly_connected_component_from'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/2.1.0/tsort.rb:347:in `block in each_strongly_connected_component'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/2.1.0/tsort.rb:345:in `each'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/2.1.0/tsort.rb:345:in `call'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/2.1.0/tsort.rb:345:in `each_strongly_connected_component'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/2.1.0/tsort.rb:224:in `tsort_each'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/2.1.0/tsort.rb:205:in `tsort_each'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/railties-4.1.6/lib/rails/initializable.rb:54:in `run_initializers'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/railties-4.1.6/lib/rails/application.rb:300:in `initialize!'
    from /Users/Clam/rails_projects/lets_chill/config/environment.rb:5:in `<top (required)>'
    from /Users/Clam/rails_projects/lets_chill/spec/rails_helper.rb:4:in `require'
    from /Users/Clam/rails_projects/lets_chill/spec/rails_helper.rb:4:in `<top (required)>'
    from /Users/Clam/rails_projects/lets_chill/spec/controllers/sessions_controller_spec.rb:1:in `require'
    from /Users/Clam/rails_projects/lets_chill/spec/controllers/sessions_controller_spec.rb:1:in `<top (required)>'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/rspec-core-3.1.7/lib/rspec/core/configuration.rb:1105:in `load'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/rspec-core-3.1.7/lib/rspec/core/configuration.rb:1105:in `block in load_spec_files'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/rspec-core-3.1.7/lib/rspec/core/configuration.rb:1105:in `each'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/rspec-core-3.1.7/lib/rspec/core/configuration.rb:1105:in `load_spec_files'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/rspec-core-3.1.7/lib/rspec/core/runner.rb:96:in `setup'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/rspec-core-3.1.7/lib/rspec/core/runner.rb:84:in `run'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/rspec-core-3.1.7/lib/rspec/core/runner.rb:69:in `run'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/rspec-core-3.1.7/lib/rspec/core/runner.rb:37:in `invoke'
    from /Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/rspec-core-3.1.7/exe/rspec:4:in `<top (required)>'
    from /Users/Clam/.rbenv/versions/2.1.1/bin/rspec:23:in `load'
    from /Users/Clam/.rbenv/versions/2.1.1/bin/rspec:23:in `<main>'

rescue in connection_for'：连接被拒绝：localhost:7475（法拉第：：连接失败）
from/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/net-http-persistent-2.9.4/lib/net/http/persistent.rb:589:在“连接”中
来自/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/net-http-persistent-2.9.4/lib/net/http/persistent.rb:994:“请求”中
来自/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/faraday-0.9.0/lib/faraday/adapter/net_http_persistent.rb:25:“执行请求”中
from/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/faraday-0.9.0/lib/faraday/adapter/net_http.rb:39:in“call”
from/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/faraday_middleware-0.9.1/lib/faraday_middleware/response_middleware.rb:30:in'call'
from/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/faraday_middleware-0.9.1/lib/faraday_middleware/request/encode_json.rb:23:in'call'
来自/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/faraday-0.9.0/lib/faraday/rack_builder.rb:139:“构建响应”中
from/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/faraday-0.9.0/lib/faraday/connection.rb:377:在“运行请求”中
from/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/faraday-0.9.0/lib/faraday/connection.rb:140:in'get'
来自/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/neo4j-core-3.0.1/lib/neo4j-server/cypher_session.rb:41:在“开放”中
from/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/neo4j-core-3.0.1/lib/neo4j-server/cypher_session.rb:5:in'block in'
来自/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/neo4j-core-3.0.1/lib/neo4j/session.rb:112:在“调用”中
来自/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/neo4j-core-3.0.1/lib/neo4j/session.rb:112:“创建会话”
来自/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/neo4j-core-3.0.1/lib/neo4j/session.rb:99:在“开放”中
来自/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/neo4j-3.0.1/lib/neo4j/railtie.rb:57:在“开放式”neo4j_会话中
from/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/neo4j-3.0.1/lib/neo4j/railtie.rb:73:in `块（2层）in'
from/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/neo4j-3.0.1/lib/neo4j/railtie.rb:72:in'each'
from/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/neo4j-3.0.1/lib/neo4j/railtie.rb:72:in'block in'
from/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/railties-4.1.6/lib/rails/initializable.rb:30:in'instance_exec'
来自/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/railties-4.1.6/lib/rails/initializable.rb:30:在“运行”中
from/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/railties-4.1.6/lib/rails/initializable.rb:55:“运行中的块中的初始化器”
from/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/2.1.0/tsort.rb:226:in'block in tsort_each'
from/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/2.1.0/tsort.rb:348:在每个强连接的组件中的“块（2个级别）”中
from/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/2.1.0/tsort.rb:427:在“每个强连接的组件”中
from/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/2.1.0/tsort.rb:347:in“每个强连接的组件中的块”
from/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/2.1.0/tsort.rb:345:in'each'
from/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/2.1.0/tsort.rb:345:in'call'
from/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/2.1.0/tsort.rb:345:“每个强连接的组件”
from/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/2.1.0/tsort.rb:224:in'tsort_each'
from/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/2.1.0/tsort.rb:205:in'tsort_each'
来自/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/railties-4.1.6/lib/rails/initializable.rb:54:in“run_initializers”
来自/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/railties-4.1.6/lib/rails/application.rb:300:in'initialize！'
来自/Users/Clam/rails\u projects/lets\u chill/config/environment.rb:5:in`'
from/Users/Clam/rails\u projects/lets\u chill/spec/rails\u helper.rb:4:in'require'
from/Users/Clam/rails\u projects/lets\u chill/spec/rails\u helper.rb:4:in`'
from/Users/Clam/rails\u projects/lets\u chill/spec/controllers/sessions\u controller\u spec.rb:1:in'require'
from/Users/Clam/rails\u projects/lets\u chill/spec/controllers/sessions\u controller\u spec.rb:1:in`'
来自/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/rspec-core-3.1.7/lib/rspec/core/configuration.rb:1105:in'load'
来自/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/rspec-core-3.1.7/lib/rspec/core/configuration.rb:1105:“加载规范文件中的块”
from/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/rspec-core-3.1.7/lib/rspec/core/configuration.rb:1105:在'each'中
来自/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/rspec-core-3.1.7/lib/rspec/core/configuration.rb:1105:“加载规范文件”中
来自/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/rspec-core-3.1.7/lib/rspec/core/runner.rb:96:在“设置”中
来自/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/rspec-core-3.1.7/lib/rspec/core/runner.rb:84:在“运行”中
from/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/rspec-core-3.1.7/lib/rspec/core/runner.rb:69:在“run”中
来自/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/rspec-core-3.1.7/lib/rspec/core/runner.rb:37:in“invoke”
来自/Users/Clam/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0/gems/rspec-core-3.1.7/exe/rspec:4:in`'
from/Users/Clam/.rbenv/versions/2.1.1/bin/rspec:23:in'load'
from/Users/Clam/.rbenv/versions/2.1.1/bin/rspec:23:in`'