gistfile1.txt

$ bundle gem bugtest
      create  bugtest/Gemfile
      create  bugtest/Rakefile
      create  bugtest/LICENSE.txt
      create  bugtest/README.md
      create  bugtest/.gitignore
      create  bugtest/bugtest.gemspec
      create  bugtest/lib/bugtest.rb
      create  bugtest/lib/bugtest/version.rb
Initializating git repo in /Users/mscottford/src/bundler/testcases/i1041/bugtest

$ cd bugtest

$ bundle --version
Bundler version 1.2.3

$ gem --version
1.8.23

$ cat bugtest.gemspec 
# -*- encoding: utf-8 -*-
lib = File.expand_path('../lib', __FILE__)
$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
require 'bugtest/version'

Gem::Specification.new do |gem|
  gem.name          = "bugtest"
  gem.version       = Bugtest::VERSION
  gem.authors       = ["M. Scott Ford"]
  gem.email         = ["scott@mscottford.com"]
  gem.description   = %q{TODO: Write a gem description}
  gem.summary       = %q{TODO: Write a gem summary}
  gem.homepage      = ""

  gem.files         = `git ls-files`.split($/)
  gem.executables   = gem.files.grep(%r{^bin/}).map{ |f| File.basename(f) }
  gem.test_files    = gem.files.grep(%r{^(test|spec|features)/})
  gem.require_paths = ["lib"]

  gem.add_runtime_dependency 'haml', '~> 3.1.7'

  gem.add_development_dependency 'rspec-core', '~> 2.12.2'
end

$ cat Gemfile 
source 'https://rubygems.org'

# Specify your gem's dependencies in bugtest.gemspec
gemspec

$ bundle
Fetching gem metadata from https://rubygems.org/.....
Using haml (3.1.7) 
Using bugtest (0.0.1) from source at /Users/mscottford/src/bundler/testcases/i1041/bugtest 
Using rspec-core (2.12.2) 
Using bundler (1.2.3) 
Your bundle is complete! Use `bundle show [gemname]` to see where a bundled gem is installed.

$ cat Gemfile.lock
PATH
  remote: .
  specs:
    bugtest (0.0.1)
      haml (~> 3.1.7)

GEM
  remote: https://rubygems.org/
  specs:
    haml (3.1.7)
    rspec-core (2.12.2)

PLATFORMS
  ruby

DEPENDENCIES
  bugtest!
  rspec-core (~> 2.12.2)