title: LoadError: cannot load such file -- rspec/core/rake_task
body: <p>When I rake, I got this error. 
  </p>
  
  <pre><code>AllenLins-MacBook-Pro:geoblacklight allenlin$ rake -t
  Resolving dependencies...
  You must `gem install bundler` and `bundle install` to run rake tasks
  rake aborted!
  LoadError: cannot load such file -- rspec/core/rake_task
  /Users/allenlin/Documents/USpatial/geoblacklight/Rakefile:12:in `require'
  /Users/allenlin/Documents/USpatial/geoblacklight/Rakefile:12:in `&lt;top (required)&gt;'
  /Users/allenlin/.rbenv/versions/2.2.2/lib/ruby/2.2.0/rake/rake_module.rb:28:in `load'
  /Users/allenlin/.rbenv/versions/2.2.2/lib/ruby/2.2.0/rake/rake_module.rb:28:in `load_rakefile'
  /Users/allenlin/.rbenv/versions/2.2.2/lib/ruby/2.2.0/rake/application.rb:689:in `raw_load_rakefile'
  /Users/allenlin/.rbenv/versions/2.2.2/lib/ruby/2.2.0/rake/application.rb:94:in `block in load_rakefile'
  /Users/allenlin/.rbenv/versions/2.2.2/lib/ruby/2.2.0/rake/application.rb:176:in `standard_exception_handling'
  /Users/allenlin/.rbenv/versions/2.2.2/lib/ruby/2.2.0/rake/application.rb:93:in `load_rakefile'
  /Users/allenlin/.rbenv/versions/2.2.2/lib/ruby/2.2.0/rake/application.rb:77:in `block in run'
  /Users/allenlin/.rbenv/versions/2.2.2/lib/ruby/2.2.0/rake/application.rb:176:in `standard_exception_handling'
  /Users/allenlin/.rbenv/versions/2.2.2/lib/ruby/2.2.0/rake/application.rb:75:in `run'
  /Users/allenlin/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/rake-10.4.2/bin/rake:33:in `&lt;top (required)&gt;'
  /Users/allenlin/.rbenv/versions/2.2.2/bin/rake:23:in `load'
  /Users/allenlin/.rbenv/versions/2.2.2/bin/rake:23:in `&lt;main&gt;'
  </code></pre>
  
  <p><strong>However, I've run the 'gem install bundler' and 'bundle install' the rspec/core/rake_task actually exists, shown by</strong></p>
  
  
  
  <pre><code>AllenLins-MacBook-Pro:geoblacklight allenlin$ gem which rspec/core/rake_task
  /Users/allenlin/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/rspec-core-3.0.4/lib/rspec/core/rake_task.rb
  </code></pre>
  
  <p>I am lost here. Thanks so much for any help on this! I attached the Gemfile:</p>
  
  
  
  <pre><code>source 'https://rubygems.org'
  
  # Specify your gem's dependencies in geoblacklight.gemspec
  gemspec
  
  # If we don't specify 2.11.0 we'll end up with sprockets 2.12.0 in the main
  # Gemfile.lock but since sass-rails gets generated (rails new) into the test app
  # it'll want sprockets 2.11.0 and we'll have a conflict
  gem 'sprockets', '2.11.0'
  
  # If we don't specify 3.2.15 we'll end up with sass 3.3.2 in the main
  # Gemfile.lock but since sass-rails gets generated (rails new) into the test app
  # it'll want sass 3.2.0 and we'll have a conflict
  gem 'sass', '~&gt; 3.2.0'
  gem 'bootstrap-sass', "&gt;= 3.2"
  
  group :test do
    # Peg simplecov to &lt; 0.8 until this is resolved:
    # https://github.com/colszowka/simplecov/issues/281
    gem 'simplecov', '~&gt; 0.7.1', require: false
    gem 'coveralls', require: false
  end
  </code></pre>
  
  <p><strong>Update</strong></p>
  
  <p>Add my gem env if that's helpful</p>
  
  
  
  <pre><code>RubyGems Environment:
    - RUBYGEMS VERSION: 2.4.5
    - RUBY VERSION: 2.2.2 (2015-04-13 patchlevel 95) [x86_64-darwin14]
    - INSTALLATION DIRECTORY: /Users/allenlin/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0
    - RUBY EXECUTABLE: /Users/allenlin/.rbenv/versions/2.2.2/bin/ruby
    - EXECUTABLE DIRECTORY: /Users/allenlin/.rbenv/versions/2.2.2/bin
    - SPEC CACHE DIRECTORY: /Users/allenlin/.gem/specs
    - SYSTEM CONFIGURATION DIRECTORY: /Users/allenlin/.rbenv/versions/2.2.2/etc
    - RUBYGEMS PLATFORMS:
      - ruby
      - x86_64-darwin-14
    - GEM PATHS:
       - /Users/allenlin/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0
       - /Users/allenlin/.gem/ruby/2.2.0
    - GEM CONFIGURATION:
       - :update_sources =&gt; true
       - :verbose =&gt; true
       - :backtrace =&gt; false
       - :bulk_threshold =&gt; 1000
    - REMOTE SOURCES:
       - https://rubygems.org/
    - SHELL PATH:
       - /Users/allenlin/.rbenv/versions/2.2.2/bin
       - /usr/local/Cellar/rbenv/0.4.0/libexec
       - /Users/allenlin/.rbenv/shims
       - /Applications/Postgres.app/Contents/Versions/9.3/bin
       - /Library/Frameworks/Python.framework/Versions/2.7/bin
       - /Users/allenlin/Library/Enthought/Canopy_64bit/User/bin
       - /Users/allenlin/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/bundler-1.9.6/bin
       - /Users/allenlin/gradle-1.12/bin
       - /usr/local/bin
       - /Users/allenlin/apache-maven/apache-maven-3.1.1/bin
       - /usr/local/bin
       - /usr/bin
       - /bin
       - /usr/sbin
       - /sbin
       - /opt/X11/bin
       - /usr/local/git/bin
       - /usr/texbin
  </code></pre>