CSC/ECE 517 Fall 2018/E1852 Unit Test for Participant Model
Expertiza
Expertiza is a web application designed for academia. The users of this application are instructors and students. A user as an instructor can create new assignments as well as customize existing assignments for students. Students can submit assignments, view assignment deadlines, bid for an assignment topic, create a team and peer-review learning objects (articles, code, websites, etc).
Problem Statement
The Rspec file participant_spec.rb existed with test cases for name and fullname methods and provided path coverage of 36.08% for the participant model. The test cases must be written so that the path coverage is above 90%. Also, ensure that the branch coverage is as high as possible for many edge cases.
Files Involved
The files to be worked upon are:
1. app/models/participant.rb
2. spec/models/participant_spec.rb
Team Members
Students who collaborated to work on this problem statement are :
1. Reetu Shakya (rshakya@ncsu.edu)
2. Suhas Naramballi Gururaja (snaramb@ncsu.edu)
3. Tejas Gupta (tgupta4@ncsu.edu)
Steps for Implementation
Plan of Work
The task is to write unit test cases for testing the participant model file. The procedure for project planning included :-
1. Setting the Expertiza environment. We used NCSU VCL image of [CSC517, S18] Ruby on Rails/Expertiza.
2. Understand the functionality of model file in participant.rb
3. Understand the linked data attributes being used, like assignment, topic, questionnaire
4. Writing testing conditions for different functions.
Setting the Expertiza environment
1. Reserve a NCSU VCL image of [CSC517, S18] Ruby on Rails / Expertiza.
2. Connect to the reservation using SSH and enter your campus credentials for User ID and password.
3. Commands executed for setup in terminal of VCL image:
sudo su gem install bundler exit git clone [Your forked Expertiza repo url] cd expertiza bash setup.sh (change config/database.yml, there is no MySQL password by default) bundle install rails server
Unit Testing with RSpec
Expertiza is an open source project written in Ruby, hence it uses Rspec which is a unit test framework for the Ruby programming language. To access the effectiveness of our testing, we have used SimpleCov, a code coverage analysis tool.
Test Cases
Test responses
A Participant has many ResponseMaps that map a connection between this participant as a reviewer and as a reviewee. Each ResponseMap has many Responses associated with it. When responses method is called on a Participant, it should return an array of responses associated to this Participant.
def responses
response_maps.map(&:response)
end
The test below will test a participant with no corresponding mapping. Hence the result of the responses provided by the participant is a nil list
describe '#responses' do
it 'returns an array of responses of the participant' do
expect(participant.responses).to eql([])
end
end
Test name
The method name returns the name of the participants
def name(ip_address = nil)
self.user.name(ip_address)
end
The test below will return the name of the participant. A factory build initializes the participant with the name as student and calls the function to expect student as the outcome
describe "#name" do
it "returns the name of the user" do
expect(participant.name).to eq "Student"
end
end
A Participant is a User. When name method is called on a Participant, it should return the name of this User.
Link title
Test fullname
A Participant is a User. When fullname method is called on a Participant, it should return the full name of this User.
def fullname(ip_address = nil)
self.user.fullname(ip_address)
end
The test is done similar to name that it expects a name which was loaded in the factory build
describe "#name" do
it "returns the name of the user" do
expect(participant.name).to eq "Student"
end
end
Test delete and Forced delete
The method deletes a participant team if the participant is not associated with any team. It makes a call to force delete when the argument is true A single test case can validate the positive scenario of delete method
def delete(force = nil)
maps = ResponseMap.where('reviewee_id = ? or reviewer_id = ?', self.id, self.id)
if force or (maps.blank? and self.team.nil?)
force_delete(maps)
else
raise "Associations exist for this participant."
end
end
def force_delete(maps)
maps and maps.each(&:destroy)
if self.team and self.team.teams_users.length == 1
self.team.delete
elsif self.team
self.team.teams_users.each {|teams_user| teams_user.destroy if teams_user.user_id == self.id }
end
self.destroy
end
The test case will attempt to delete the participant. Since the participant is not having association it will call the forced delete function and returns participant for deleting.
describe "#delete" do
it " should remove a participant if there is no pre-existing association" do
expect(participant.delete(true)).to eq(participant)
end
end
Test topic_name
The method return the name of the topic which the participant has been assigned with.
def topic_name
if topic.nil? or topic.topic_name.empty?
"<center>—</center>" # em dash
else
topic.topic_name
end
end
The test will check for the error when the participant is having an assignment without a topic
describe '#topic_name' do
context 'when the participant has an assignment without a topic' do
it 'returns error message' do
expect(participant.topic_name).to eql('<center>—</center>')
end
end
Test able_to_review A simple method which gives the status on whether participant can review.
def able_to_review can_review end
When able_to_review method is called on a Participant, it should return true if it can review and false otherwise.
describe '#able_to_review' do
it 'returns true if the participant can review' do
expect(participant.able_to_review).to eql(true)
end
end
When scores method is called on a Participant, it should return the total scores it received for a given number of questions.
Test get_permissions
This method returns a hash of the boolean value based on the authorization. The result of the boolean determined the ability to review , take quiz and submit.
def self.get_permissions(authorization)
can_submit = true
can_review = true
can_take_quiz = true
case authorization
when 'reader'
can_submit = false
when 'reviewer'
can_submit = false
can_take_quiz = false
when 'submitter'
can_review = false
can_take_quiz = false
end
{can_submit: can_submit, can_review: can_review, can_take_quiz: can_take_quiz}
end
The test case here checks whether the output hash will have the correct combination of trues and false for the authorization
describe '.get_permissions' do
context 'when current participant is authorized as reader' do
it 'participant cannot submit' do
expect(Participant.get_permissions('reader')).to eql({ :can_submit => false, :can_review => true, :can_take_quiz => true})
end
end
context 'when current participant is authorized as reviewer' do
it 'participant can only review' do
expect(Participant.get_permissions('reviewer')).to eql({ :can_submit => false, :can_review => true, :can_take_quiz => false})
end
end
context 'when current participant is authorized as submitter' do
it 'participant can only submit' do
expect(Participant.get_permissions('submitter')).to eql({ :can_submit => true, :can_review => false, :can_take_quiz => false})
end
end
end
Test get_authorization
The method get authorization basically determies the role based on the ability to submit, review and take quiz
def self.get_authorization(can_submit, can_review, can_take_quiz)
authorization = 'participant'
authorization = 'reader' if can_submit == false and can_review == true and can_take_quiz == true
authorization = 'submitter' if can_submit == true and can_review == false and can_take_quiz == false
authorization = 'reviewer' if can_submit == false and can_review == true and can_take_quiz == false
authorization
end
The test cases below are designed to validate whether the method produced the 3 desired outcomes.
The first test case validates the outcome to be reader, second one check for the outcome submitter and third will check if its a reviewer
describe ".get_authorization" do
it "returns authorization as reader when input is true for can_review and can_take quiz" do
expect(Participant.get_authorization(false, true, true )).to eq('reader')
end
it "returns authorization submitter when input is true only for can_submit" do
expect(Participant.get_authorization(true, false, false)).to eq('submitter')
end
it "returns authorization as reviewer when the input is true for only for can_review" do
expect(Participant.get_authorization(false, true, false)).to eq('reviewer')
end
end
Test sort_by_name
Participants are Users. When self.sort_by_name method is called on a Participant, it should sort a given set of participants based on their user names.
def self.sort_by_name(participants)
users = []
participants.each {|p| users << p.user }
users.sort! {|a, b| a.name.downcase <=> b.name.downcase } # Sort the users based on the name
participants.sort_by {|p| users.map(&:id).index(p.user_id) }
end
The test builds participants using factory methods and assigns name as specified. Then a function calls for sorting and the expected outcome is matched with the result
describe '.sort_by_name' do
it 'sorts a set of participants based on their user names' do
stu1 = build(:student, name: "Student1")
stu2 = build(:student, name: "Student2")
stu3 = build(:student, name: "Student3")
p1 = build(:participant, user: stu1, id: 2)
p2 = build(:participant, user: stu2, id: 3)
p3 = build(:participant, user: stu3, id: 1)
participants = [ p2, p1, p3]
sorted_participants = Participant.sort_by_name(participants)
expect(Participant.sort_by_name(participants)).to match_array([p1, p2, p3])
expect(sorted_participants.length).to eql(3)
ids = []
sorted_participants.each do |p|
ids << p.id
end
expect(ids).to match_array([2, 3, 1])
end
Results
We have a coverage of 77.38%. The test running can be seen at OSS Project: E1852 Unit Test for Participant Model The repository having the modified model files can be viewed at http://github.com/Suhas-NG/expertiza/blob/master/spec/models/participant_spec.rb