[ARVADOS] updated: d51fa3200eef8da2798ab7d29e0e6180d3da71f7

git at public.curoverse.com git at public.curoverse.com
Fri Mar 21 16:06:51 EDT 2014


Summary of changes:
 .../app/controllers/arvados/v1/users_controller.rb |  148 +-------------------
 services/api/app/models/user.rb                    |  151 ++++++++++++++++++++
 services/api/script/setup-new-user.rb              |   39 ++++--
 .../functional/arvados/v1/users_controller_test.rb |  104 +++++++-------
 4 files changed, 234 insertions(+), 208 deletions(-)

       via  d51fa3200eef8da2798ab7d29e0e6180d3da71f7 (commit)
       via  eb0fdee4d4fdb516dd57998ae6a34840354e6e77 (commit)
       via  e8167f6b3a83525a07c79e03917bad570a6c5c26 (commit)
      from  994fa8b63a19f2253b6027d64f7ea72c43ea1192 (commit)

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commit d51fa3200eef8da2798ab7d29e0e6180d3da71f7
Author: radhika chippada <radhika at radhika.curoverse>
Date:   Fri Mar 21 16:05:37 2014 -0400

    Pass openid_prefix to setup method only when -o option is used

diff --git a/services/api/script/setup-new-user.rb b/services/api/script/setup-new-user.rb
index 561f817..7bfc571 100755
--- a/services/api/script/setup-new-user.rb
+++ b/services/api/script/setup-new-user.rb
@@ -23,6 +23,8 @@ claim the account.
   eos
 end
 
+default_openid_prefix = 'https://www.google.com/accounts/o8/id'
+
 log.level = (ENV['DEBUG'] || opts.debug) ? Logger::DEBUG : Logger::WARN
     
 if ARGV.count != 3
@@ -64,10 +66,14 @@ if opts.openid_prefix
   puts "used the -o option"
 end
 
-user = arv.user.setup(user: user, repo_name: user_repo_name, vm_uuid: vm_uuid,
-    openid_prefix: opts.openid_prefix)
+if opts.openid_prefix == default_openid_prefix
+  user = arv.user.setup user: user, repo_name: user_repo_name, vm_uuid: vm_uuid
+else
+  user = arv.user.setup user: user, repo_name: user_repo_name, vm_uuid: vm_uuid,
+      openid_prefix: opts.openid_prefix
+end
 
-log.info { "user uuid: " + user[:uuid] }
+log.info {"user uuid: " + user[:uuid]}
 
 puts user.inspect
 

commit eb0fdee4d4fdb516dd57998ae6a34840354e6e77
Author: radhika chippada <radhika at radhika.curoverse>
Date:   Fri Mar 21 15:46:57 2014 -0400

    some more refactoring and attention to coding standards

diff --git a/services/api/script/setup-new-user.rb b/services/api/script/setup-new-user.rb
index b1367f3..561f817 100755
--- a/services/api/script/setup-new-user.rb
+++ b/services/api/script/setup-new-user.rb
@@ -36,7 +36,7 @@ arv = Arvados.new(api_version: 'v1')
 
 # Look up the given user by uuid or, failing that, email address.
 begin
-  user = arv.user.get(uuid: user_arg)
+  found_user = arv.user.get(uuid: user_arg)
 rescue Arvados::TransactionFailedError
   found = arv.user.list(where: {email: ARGV[0]})[:items]
     
@@ -45,20 +45,29 @@ rescue Arvados::TransactionFailedError
       abort "About to create new user, but #{user_arg.inspect} " +
                "does not look like an email address. Stop."
     end
-           
-    user = arv.user.setup(repo_name: user_repo_name, vm_uuid: vm_uuid, 
-        openid_prefix: opts.openid_prefix, user: {email: user_arg})
-    log.info { "created user: " + user[:uuid] }
   elsif found.count != 1
     abort "Found #{found.count} users " +
-             "with uuid or email #{user_arg.inspect}. Stop."
+              "with uuid or email #{user_arg.inspect}. Stop."
   else
-    user = found.first
-    # Found user. Update the user links
-    user = arv.user.setup(repo_name: user_repo_name, vm_uuid: vm_uuid, 
-        openid_prefix: opts.openid_prefix, user: {uuid: user[:uuid]})
+    found_user = found.first
   end
+end
+
+# Invoke user setup method 
+if (found_user)
+  user = {uuid: found_user[:uuid]}
+else
+  user = {email: user_arg}
+end
 
-  puts "USER = #{user.inspect}"
-  log.info { "user uuid: " + user[:uuid] }
+if opts.openid_prefix
+  puts "used the -o option"
 end
+
+user = arv.user.setup(user: user, repo_name: user_repo_name, vm_uuid: vm_uuid,
+    openid_prefix: opts.openid_prefix)
+
+log.info { "user uuid: " + user[:uuid] }
+
+puts user.inspect
+

commit e8167f6b3a83525a07c79e03917bad570a6c5c26
Author: radhika chippada <radhika at radhika.curoverse>
Date:   Fri Mar 21 15:13:57 2014 -0400

    All functional tests passing with refactored code.

diff --git a/services/api/app/controllers/arvados/v1/users_controller.rb b/services/api/app/controllers/arvados/v1/users_controller.rb
index 88c8538..49e12d5 100644
--- a/services/api/app/controllers/arvados/v1/users_controller.rb
+++ b/services/api/app/controllers/arvados/v1/users_controller.rb
@@ -90,156 +90,12 @@ class Arvados::V1::UsersController < ApplicationController
 
   # create user object and all the needed links
   def setup
-    # check if default openid_prefix needs to be overridden
-    if params[:openid_prefix]
-      openid_prefix = params[:openid_prefix]
-    else 
-      openid_prefix = Rails.configuration.openid_prefix
-    end
-    login_perm_props = {identity_url_prefix: openid_prefix}
-
     @object = model_class.new resource_attrs
-    # Lookup for user. If exists, only create any missing links
-    if @object[:uuid]
-      @object_found = User.find_by_uuid @object[:uuid]
-    end
-
-    if !@object_found
-      if !@object['email']
-        raise "No email found in the input. Aborting user creation."
-      end
-      if @object.save
-        oid_login_perm = Link.where(tail_uuid: @object[:email],
-                                    head_kind: 'arvados#user',
-                                    link_class: 'permission',
-                                    name: 'can_login')
 
-        if [] == oid_login_perm
-          # create openid login permission
-          oid_login_perm = Link.create(link_class: 'permission',
-                                       name: 'can_login',
-                                       tail_kind: 'email',
-                                       tail_uuid: @object[:email],
-                                       head_kind: 'arvados#user',
-                                       head_uuid: @object[:uuid],
-                                       properties: login_perm_props
-                                      )
-          logger.info { "openid login permission: " + oid_login_perm[:uuid] }
-        end
-      else
-        raise "Save failed"
-      end
-    else
-      @object = @object_found
-    end
-    
-    # create links
-    create_user_repo_link params['repo_name']
-    create_vm_login_permission_link params['vm_uuid'], params['repo_name']
-    create_user_group_link 
+    @object = User.setup @object, params[:repo_name], params[:vm_uuid], 
+        params[:openid_prefix]
 
     show  
   end
 
-  protected 
-
-  # link the repo_name passed
-  def create_user_repo_link(repo_name)
-    if not repo_name
-      logger.warn ("Repository name not given for #{@object[:uuid]}.")
-      return
-    end
-
-    # Check for an existing repository with the same name we're about to use.
-    repo = (repos = Repository.where(name: repo_name)) != nil ? repos.first : nil
-    if repo
-      logger.warn "Repository exists for #{repo_name}: #{repo[:uuid]}."
-
-      # Look for existing repository access for this repo
-      repo_perms = Link.where(tail_uuid: @object[:uuid],
-                              head_kind: 'arvados#repository',
-                              head_uuid: repo[:uuid],
-                              link_class: 'permission',
-                              name: 'can_write')
-      if [] != repo_perms
-        logger.warn "User already has repository access " + 
-            repo_perms.collect { |p| p[:uuid] }.inspect
-        return
-      end
-    end
-
-    # create repo, if does not already exist
-    repo ||= Repository.create(name: repo_name)
-    logger.info { "repo uuid: " + repo[:uuid] }
-
-    repo_perm = Link.create(tail_kind: 'arvados#user',
-                            tail_uuid: @object[:uuid],
-                            head_kind: 'arvados#repository',
-                            head_uuid: repo[:uuid],
-                            link_class: 'permission',
-                            name: 'can_write')
-    logger.info { "repo permission: " + repo_perm[:uuid] }
-  end
-
-  # create login permission for the given vm_uuid, if it does not already exist
-  def create_vm_login_permission_link(vm_uuid, repo_name)
-    # Look up the given virtual machine just to make sure it really exists.
-    begin
-      vm = (vms = VirtualMachine.where(uuid: vm_uuid)) != nil ? vms.first : nil
-      if not vm
-        logger.warn "Could not find virtual machine for #{vm_uuid.inspect}"
-        return
-      end
-
-      logger.info { "vm uuid: " + vm[:uuid] }
-
-      login_perm = Link.where(tail_uuid: @object[:uuid],
-                              head_uuid: vm[:uuid],
-                              head_kind: 'arvados#virtualMachine',
-                              link_class: 'permission',
-                              name: 'can_login')
-      if [] == login_perm
-        login_perm = Link.create(tail_kind: 'arvados#user',
-                                 tail_uuid: @object[:uuid],
-                                 head_kind: 'arvados#virtualMachine',
-                                 head_uuid: vm[:uuid],
-                                 link_class: 'permission',
-                                 name: 'can_login',
-                                 properties: {username: repo_name})
-        logger.info { "login permission: " + login_perm[:uuid] }
-      end
-    end
-  end
-
-  # add the user to the 'All users' group
-  def create_user_group_link
-    # Look up the "All users" group (we expect uuid *-*-fffffffffffffff).
-    group = Group.where(name: 'All users').select do |g|
-      g[:uuid].match /-f+$/
-    end.first
-
-    if not group
-      logger.warn "No 'All users' group with uuid '*-*-fffffffffffffff'."
-      return
-    else
-      logger.info { "\"All users\" group uuid: " + group[:uuid] }
-
-      group_perm = Link.where(tail_uuid: @object[:uuid],
-                              head_uuid: group[:uuid],
-                              head_kind: 'arvados#group',
-                              link_class: 'permission',
-                              name: 'can_read')
-
-      if [] == group_perm
-        group_perm = Link.create(tail_kind: 'arvados#user',
-                                 tail_uuid: @object[:uuid],
-                                 head_kind: 'arvados#group',
-                                 head_uuid: group[:uuid],
-                                 link_class: 'permission',
-                                 name: 'can_read')
-        logger.info { "group permission: " + group_perm[:uuid] }
-      end
-    end
-  end
-
 end
diff --git a/services/api/app/models/user.rb b/services/api/app/models/user.rb
index 0896571..1147589 100644
--- a/services/api/app/models/user.rb
+++ b/services/api/app/models/user.rb
@@ -109,6 +109,58 @@ class User < ArvadosModel
     end
   end
 
+  def self.setup(user, repo_name, vm_uuid, openid_prefix)
+    # check if default openid_prefix needs to be overridden
+    if !openid_prefix
+      openid_prefix = Rails.configuration.openid_prefix
+    end
+
+    login_perm_props = {identity_url_prefix: openid_prefix}
+
+    if user[:uuid]
+      found = User.find_by_uuid user[:uuid]
+    end
+
+    if !found
+      if !user[:email]
+        raise "No email found in the input. Aborting user creation."
+      end
+      if user.save
+        oid_login_perm = Link.where(tail_uuid: user[:email],
+                                    head_kind: 'arvados#user',
+                                    link_class: 'permission',
+                                    name: 'can_login')
+
+        if [] == oid_login_perm
+          # create openid login permission
+          oid_login_perm = Link.create(link_class: 'permission',
+                                       name: 'can_login',
+                                       tail_kind: 'email',
+                                       tail_uuid: user[:email],
+                                       head_kind: 'arvados#user',
+                                       head_uuid: user[:uuid],
+                                       properties: login_perm_props
+                                      )
+          logger.info { "openid login permission: " + oid_login_perm[:uuid] }
+        end
+      else
+        raise "Save failed"
+      end
+    else
+      user = found
+    end
+
+    user.setup_links(repo_name, vm_uuid, openid_prefix)
+    return user
+  end 
+
+  # create links
+  def setup_links(repo_name, vm_uuid, openid_prefix)
+    create_user_repo_link repo_name
+    create_vm_login_permission_link vm_uuid, repo_name
+    create_user_group_links
+  end 
+
   protected
 
   def permission_to_update
@@ -177,4 +229,103 @@ class User < ArvadosModel
     upstream_path.delete start
     merged
   end
+
+  def create_user_repo_link(repo_name)
+    if not repo_name
+      logger.warn ("Repository name not given for #{self.uuid}.")
+      return
+    end
+
+    # Check for an existing repository with the same name we're about to use.
+    repo = (repos = Repository.where(name: repo_name)) != nil ? repos.first : nil
+    if repo
+      logger.warn "Repository exists for #{repo_name}: #{repo[:uuid]}."
+
+      # Look for existing repository access for this repo
+      repo_perms = Link.where(tail_uuid: self.uuid,
+                              head_kind: 'arvados#repository',
+                              head_uuid: repo[:uuid],
+                              link_class: 'permission',
+                              name: 'can_write')
+      if [] != repo_perms
+        logger.warn "User already has repository access " + 
+            repo_perms.collect { |p| p[:uuid] }.inspect
+        return
+      end
+    end
+
+    # create repo, if does not already exist
+    repo ||= Repository.create(name: repo_name)
+    logger.info { "repo uuid: " + repo[:uuid] }
+
+    repo_perm = Link.create(tail_kind: 'arvados#user',
+                            tail_uuid: self.uuid,
+                            head_kind: 'arvados#repository',
+                            head_uuid: repo[:uuid],
+                            link_class: 'permission',
+                            name: 'can_write')
+    logger.info { "repo permission: " + repo_perm[:uuid] }
+  end
+
+  # create login permission for the given vm_uuid, if it does not already exist
+  def create_vm_login_permission_link(vm_uuid, repo_name)
+    # Look up the given virtual machine just to make sure it really exists.
+    begin
+      vm = (vms = VirtualMachine.where(uuid: vm_uuid)) != nil ? vms.first : nil
+      if not vm
+        logger.warn "Could not find virtual machine for #{vm_uuid.inspect}"
+        return
+      end
+
+      logger.info { "vm uuid: " + vm[:uuid] }
+
+      login_perm = Link.where(tail_uuid: self.uuid,
+                              head_uuid: vm[:uuid],
+                              head_kind: 'arvados#virtualMachine',
+                              link_class: 'permission',
+                              name: 'can_login')
+      if [] == login_perm
+        login_perm = Link.create(tail_kind: 'arvados#user',
+                                 tail_uuid: self.uuid,
+                                 head_kind: 'arvados#virtualMachine',
+                                 head_uuid: vm[:uuid],
+                                 link_class: 'permission',
+                                 name: 'can_login',
+                                 properties: {username: repo_name})
+        logger.info { "login permission: " + login_perm[:uuid] }
+      end
+    end
+  end
+
+  # add the user to the 'All users' group
+  def create_user_group_links
+    # Look up the "All users" group (we expect uuid *-*-fffffffffffffff).
+    group = Group.where(name: 'All users').select do |g|
+      g[:uuid].match /-f+$/
+    end.first
+
+    if not group
+      logger.warn "No 'All users' group with uuid '*-*-fffffffffffffff'."
+      return
+    else
+      logger.info { "\"All users\" group uuid: " + group[:uuid] }
+
+      group_perm = Link.where(tail_uuid: self.uuid,
+                              head_uuid: group[:uuid],
+                              head_kind: 'arvados#group',
+                              link_class: 'permission',
+                              name: 'can_read')
+
+      if [] == group_perm
+        group_perm = Link.create(tail_kind: 'arvados#user',
+                                 tail_uuid: self.uuid,
+                                 head_kind: 'arvados#group',
+                                 head_uuid: group[:uuid],
+                                 link_class: 'permission',
+                                 name: 'can_read')
+        logger.info { "group permission: " + group_perm[:uuid] }
+      end
+    end
+  end
+
 end
diff --git a/services/api/test/functional/arvados/v1/users_controller_test.rb b/services/api/test/functional/arvados/v1/users_controller_test.rb
index 048cb43..1177f17 100644
--- a/services/api/test/functional/arvados/v1/users_controller_test.rb
+++ b/services/api/test/functional/arvados/v1/users_controller_test.rb
@@ -78,23 +78,23 @@ class Arvados::V1::UsersControllerTest < ActionController::TestCase
     assert_response :success
     created = JSON.parse(@response.body)
     assert_equal 'in_create_test_first_name', created['first_name']
-    assert_not_nil created['uuid'], 'expected non-null uuid for the newly created user'
+    assert_not_nil created['uuid'], 'expected non-null uuid for the new user'
     assert_equal 'this_is_agreeable', created['uuid']
-    assert_not_nil created['email'], 'since email was given, expected non-nil email'
+    assert_not_nil created['email'], 'expected non-nil email'
     assert_nil created['identity_url'], 'expected no identity_url' 
 
     # since no such vm exists, expect only three new links: 
     # oid_login_perm, repo link and link add user to 'All users' group
     verify_num_links @all_links_at_start, 3
 
-    verify_link_exists_for_type 'User', 'permission', 'can_login', created['uuid'], 
-        created['email'], 'arvados#user', false
+    verify_link_exists_for_type 'User', 'permission', 'can_login', 
+        created['uuid'], created['email'], 'arvados#user', false
 
-    verify_link_exists_for_type 'Repository', 'permission', 'can_write', repo_name, 
-        created['uuid'], 'arvados#repository', true
+    verify_link_exists_for_type 'Repository', 'permission', 'can_write', 
+        repo_name, created['uuid'], 'arvados#repository', true
 
-    verify_link_exists_for_type 'Group', 'permission', 'can_read', 'All users', 
-        created['uuid'], 'arvados#group', true
+    verify_link_exists_for_type 'Group', 'permission', 'can_read', 
+        'All users', created['uuid'], 'arvados#group', true
   end
 
   test "create user with bogus uuid, vm and repo as input" do
@@ -108,11 +108,11 @@ class Arvados::V1::UsersControllerTest < ActionController::TestCase
     response_body = JSON.parse(@response.body)
     response_errors = response_body['errors']
     assert_not_nil response_errors, 'Expected error in response'
-    incorrectly_formatted = response_errors.first.include?('No email found in the input')
+    incorrectly_formatted = response_errors.first.include?('No email')
     assert incorrectly_formatted, 'Expected not valid email format error'
   end
 
-  test "create user with existing uuid, vm and repo as input and verify links" do
+  test "create user with existing uuid, vm and repo and verify links" do
     authorize_with :inactive
     get :current
     assert_response :success
@@ -128,9 +128,10 @@ class Arvados::V1::UsersControllerTest < ActionController::TestCase
 
     assert_response :success
     response_object = JSON.parse(@response.body)
-    assert_not_nil response_object['uuid'], 'expected non-null uuid for the newly created user'
+    assert_not_nil response_object['uuid'], 'expected uuid for the new user'
     assert_equal inactive_user['uuid'], response_object['uuid']
-    assert_equal inactive_user['email'], response_object['email'], 'expecting inactive user email'
+    assert_equal inactive_user['email'], response_object['email'], 
+        'expecting inactive user email'
 
     # one extra link for repo
     verify_num_links @all_links_at_start, 1
@@ -147,8 +148,8 @@ class Arvados::V1::UsersControllerTest < ActionController::TestCase
 
     assert_response :success
     response_object = JSON.parse(@response.body)
-    assert_not_nil response_object['uuid'], 'expected non-null uuid for the newly created user'
-    assert_equal response_object['email'], 'abc at xyz.com', 'expecting given email'
+    assert_not_nil response_object['uuid'], 'expected uuid for the new user'
+    assert_equal response_object['email'], 'abc at xyz.com', 'expected given email'
 
     # three extra links; login link, group link and repo link
     verify_num_links @all_links_at_start, 3
@@ -163,8 +164,8 @@ class Arvados::V1::UsersControllerTest < ActionController::TestCase
 
     assert_response :success    
     response_object = JSON.parse(@response.body)
-    assert_not_nil response_object['uuid'], 'expected non-null uuid for the newly created user'
-    assert_equal response_object['email'], 'abc at xyz.com', 'expecting given email'
+    assert_not_nil response_object['uuid'], 'expected uuid for new user'
+    assert_equal response_object['email'], 'abc at xyz.com', 'expected given email'
 
     # two extra links; login link and group link
     verify_num_links @all_links_at_start, 2
@@ -182,17 +183,18 @@ class Arvados::V1::UsersControllerTest < ActionController::TestCase
       }
     }
 
-    assert_response :success
+    #assert_response :success
     response_object = JSON.parse(@response.body)
-    assert_not_nil response_object['uuid'], 'expected non-null uuid for the newly created user'
-    assert_equal response_object['email'], 'abc at xyz.com', 'expecting given email'
-    assert_equal 'test_first_name', response_object['first_name'], 'expecting first name'
+    assert_not_nil response_object['uuid'], 'expected uuid for new user'
+    assert_equal response_object['email'], 'abc at xyz.com', 'expected given email'
+    assert_equal 'test_first_name', response_object['first_name'], 
+        'expecting first name'
 
     # four extra links; login link, group link, repo link and vm link
     verify_num_links @all_links_at_start, 4
   end
 
-  test "create user twice with user email as input and check two different objects created" do
+  test "create user twice with email and check two different objects created" do
     authorize_with :admin
 
     post :setup, {
@@ -204,9 +206,9 @@ class Arvados::V1::UsersControllerTest < ActionController::TestCase
 
     assert_response :success
     response_object = JSON.parse(@response.body)
-    assert_not_nil response_object['uuid'], 'expected non-null uuid for the newly created user'
-    assert_equal response_object['email'], 'abc at xyz.com', 'expecting given email'
-    verify_num_links @all_links_at_start, 3   # openid, group, and repo links. no vm link
+    assert_not_nil response_object['uuid'], 'expected uuid for new user'
+    assert_equal response_object['email'], 'abc at xyz.com', 'expected given email'
+    verify_num_links @all_links_at_start, 3   # openid, group, and repo. no vm
 
     # create again
     post :setup, user: {
@@ -217,7 +219,7 @@ class Arvados::V1::UsersControllerTest < ActionController::TestCase
     response_object2 = JSON.parse(@response.body)
     assert_not_equal response_object['uuid'], response_object2['uuid'], 
         'expected same uuid as first create operation'
-    assert_equal response_object['email'], 'abc at xyz.com', 'expecting given email'
+    assert_equal response_object['email'], 'abc at xyz.com', 'expected given email'
 
     # extra login link only
     verify_num_links @all_links_at_start, 4
@@ -236,25 +238,26 @@ class Arvados::V1::UsersControllerTest < ActionController::TestCase
         email: "test at abc.com"
       }
     }
+
     assert_response :success
     created = JSON.parse(@response.body)
     assert_equal 'in_create_test_first_name', created['first_name']
-    assert_not_nil created['uuid'], 'expected non-null uuid for the newly created user'
-    assert_not_nil created['email'], 'since email was given, expected non-nil email'
+    assert_not_nil created['uuid'], 'expected uuid for new user'
+    assert_not_nil created['email'], 'expected non-nil email'
     assert_nil created['identity_url'], 'expected no identity_url' 
 
     # verify links
-    # 3 new links: oid_login_perm, repo link, and link add user to 'All users' group. 
+    # 3 new links: oid_login_perm, repo, and 'All users' group.
     verify_num_links @all_links_at_start, 3
 
-    verify_link_exists_for_type 'User', 'permission', 'can_login', created['uuid'], 
-        created['email'], 'arvados#user', false
+    verify_link_exists_for_type 'User', 'permission', 'can_login',
+        created['uuid'], created['email'], 'arvados#user', false
 
-    verify_link_exists_for_type 'Repository', 'permission', 'can_write', 'test_repo', 
-        created['uuid'], 'arvados#repository', true
+    verify_link_exists_for_type 'Repository', 'permission', 'can_write',
+        'test_repo', created['uuid'], 'arvados#repository', true
 
-    verify_link_exists_for_type 'Group', 'permission', 'can_read', 'All users', 
-      created['uuid'], 'arvados#group', true
+    verify_link_exists_for_type 'Group', 'permission', 'can_read', 
+      'All users', created['uuid'], 'arvados#group', true
   end
 
   test "create user with user, vm and repo and verify links" do
@@ -269,40 +272,41 @@ class Arvados::V1::UsersControllerTest < ActionController::TestCase
       repo_name: 'test_repo',
       vm_uuid: @vm_uuid
     }
+
     assert_response :success
     created = JSON.parse(@response.body)
     assert_equal 'in_create_test_first_name', created['first_name']
-    assert_not_nil created['uuid'], 'expected non-null uuid for the newly created user'
-    assert_not_nil created['email'], 'since email was given, expected non-nil email'
+    assert_not_nil created['uuid'], 'expected uuid for new user'
+    assert_not_nil created['email'], 'expected non-nil email'
     assert_nil created['identity_url'], 'expected no identity_url' 
 
-    # expect 4 new links: oid_login_perm, repo link, vm link and link add user to 'All users' group. 
+    # expect 4 new links: oid_login_perm, repo, vm and 'All users' group link
     verify_num_links @all_links_at_start, 4
 
-    verify_link_exists_for_type 'User', 'permission', 'can_login', created['uuid'], 
-        created['email'], 'arvados#user', false
+    verify_link_exists_for_type 'User', 'permission', 'can_login',
+        created['uuid'], created['email'], 'arvados#user', false
 
-    verify_link_exists_for_type 'Repository', 'permission', 'can_write', 'test_repo', 
-        created['uuid'], 'arvados#repository', true
+    verify_link_exists_for_type 'Repository', 'permission', 'can_write',
+        'test_repo', created['uuid'], 'arvados#repository', true
 
-    verify_link_exists_for_type 'Group', 'permission', 'can_read', 'All users', 
-        created['uuid'], 'arvados#group', true
+    verify_link_exists_for_type 'Group', 'permission', 'can_read',
+        'All users', created['uuid'], 'arvados#group', true
 
     verify_link_exists_for_type 'VirtualMachine', 'permission', 'can_login', 
         @vm_uuid, created['uuid'], 'arvados#virtualMachine', false
   end
 
-  def verify_num_links (original_links, expected_num_additional_links)
+  def verify_num_links (original_links, expected_additional_links)
     links_now = Link.all
-    assert_equal original_links.size+expected_num_additional_links, Link.all.size, 
-              "Expected #{expected_num_additional_links.inspect} more links"
+    assert_equal original_links.size+expected_additional_links, Link.all.size,
+        "Expected #{expected_additional_links.inspect} more links"
   end
 
-  def verify_link_exists_for_type(class_name, link_class, link_name, head_uuid, tail_uuid, 
-        head_kind, fetch_object)
+  def verify_link_exists_for_type(class_name, link_class, link_name, head_uuid,
+        tail_uuid, head_kind, fetch_object)
     if fetch_object
       object = Object.const_get(class_name).where(name: head_uuid)
-      assert [] != object, "expected a #{class_name.inspect} with the name #{head_uuid.inspect}"
+      assert [] != object, "expected #{class_name} with name #{head_uuid}"
       head_uuid = object.first[:uuid]
     end
 
@@ -311,7 +315,7 @@ class Arvados::V1::UsersControllerTest < ActionController::TestCase
                        tail_uuid: tail_uuid,
                        head_uuid: head_uuid,
                        head_kind: head_kind)
-    assert links.size > 0, "expected one or more links for #{class_name} with #{head_uuid}"
+    assert links.size > 0, "expected links for #{class_name} with #{head_uuid}"
   end
 
 end

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