Add jasmine via official jasmine gem

* Run `rails g jasmine:install`
* Configure to avoid default phantomjs download

Gemfile

@@ -44,6 +44,10 @@ group :development do
   gem 'quiet_assets'
 end
 
+group :development, :test do
+  gem 'jasmine', '2.0.2'
+end
+
 gem 'logstasher', '0.4.8'
 
 group :test do

Gemfile.lock

@@ -112,6 +112,12 @@ GEM
       rails (>= 3.2.0)
     hike (1.2.3)
     i18n (0.6.9)
+    jasmine (2.0.2)
+      jasmine-core (~> 2.0.0)
+      phantomjs
+      rack (>= 1.2.1)
+      rake
+    jasmine-core (2.0.0)
     journey (1.0.4)
     jquery-rails (3.0.4)
       railties (>= 3.0, < 5.0)
@@ -143,6 +149,7 @@ GEM
       mini_portile (~> 0.5.0)
     null_logger (0.0.1)
     orm_adapter (0.5.0)
+    phantomjs (1.9.7.0)
     plek (1.7.0)
     poltergeist (1.5.0)
       capybara (~> 2.1)
@@ -268,6 +275,7 @@ DEPENDENCIES
   factory_girl_rails (= 4.3.0)
   gds-api-adapters (= 7.11.0)
   govuk_admin_template (= 1.0.4)
+  jasmine (= 2.0.2)
   json (= 1.7.7)
   kaminari (= 0.16.1)
   logstasher (= 0.4.8)

spec/javascripts/support/jasmine.yml

@@ -0,0 +1,124 @@
+# src_files
+#
+# Return an array of filepaths relative to src_dir to include before jasmine specs.
+# Default: []
+#
+# EXAMPLE:
+#
+# src_files:
+#   - lib/source1.js
+#   - lib/source2.js
+#   - dist/**/*.js
+#
+src_files:
+  - assets/application.js
+
+# stylesheets
+#
+# Return an array of stylesheet filepaths relative to src_dir to include before jasmine specs.
+# Default: []
+#
+# EXAMPLE:
+#
+# stylesheets:
+#   - css/style.css
+#   - stylesheets/*.css
+#
+stylesheets:
+  - assets/application.css
+
+# helpers
+#
+# Return an array of filepaths relative to spec_dir to include before jasmine specs.
+# Default: ["helpers/**/*.js"]
+#
+# EXAMPLE:
+#
+# helpers:
+#   - helpers/**/*.js
+#
+helpers:
+  - 'helpers/**/*.js'
+
+# spec_files
+#
+# Return an array of filepaths relative to spec_dir to include.
+# Default: ["**/*[sS]pec.js"]
+#
+# EXAMPLE:
+#
+# spec_files:
+#   - **/*[sS]pec.js
+#
+spec_files:
+  - '**/*[sS]pec.js'
+
+# src_dir
+#
+# Source directory path. Your src_files must be returned relative to this path. Will use root if left blank.
+# Default: project root
+#
+# EXAMPLE:
+#
+# src_dir: public
+#
+src_dir:
+
+# spec_dir
+#
+# Spec directory path. Your spec_files must be returned relative to this path.
+# Default: spec/javascripts
+#
+# EXAMPLE:
+#
+# spec_dir: spec/javascripts
+#
+spec_dir:
+
+# spec_helper
+#
+# Ruby file that Jasmine server will require before starting.
+# Returned relative to your root path
+# Default spec/javascripts/support/jasmine_helper.rb
+#
+# EXAMPLE:
+#
+# spec_helper: spec/javascripts/support/jasmine_helper.rb
+#
+spec_helper: spec/javascripts/support/jasmine_helper.rb
+
+# boot_dir
+#
+# Boot directory path. Your boot_files must be returned relative to this path.
+# Default: Built in boot file
+#
+# EXAMPLE:
+#
+# boot_dir: spec/javascripts/support/boot
+#
+boot_dir:
+
+# boot_files
+#
+# Return an array of filepaths relative to boot_dir to include in order to boot Jasmine
+# Default: Built in boot file
+#
+# EXAMPLE
+#
+# boot_files:
+#   - '**/*.js'
+#
+boot_files:
+
+# rack_options
+#
+# Extra options to be passed to the rack server
+# by default, Port and AccessLog are passed.
+#
+# This is an advanced options, and left empty by default
+#
+# EXAMPLE
+#
+# rack_options:
+#   server: 'thin'
+

spec/javascripts/support/jasmine_helper.rb

@@ -0,0 +1,4 @@
+# Prevent PhantomJS auto install, uses PhantomJS already on your path.
+Jasmine.configure do |config|
+  config.prevent_phantom_js_auto_install = true
+end