Wie schreibe RSpec Testcode für diesen Code?

Question

Ich lerne RSpec Tests. Jetzt möchte ich über den rspec des unten angegebenen Codes schreiben, aber ich kann nicht.

module FrontendHelper 
    def scholarship_style_change(scholarship) 
    array = [] 
    if scholarship.discount >= 50 && scholarship.id.odd? 
     array = ['OliveDrab', 'box box-border'] 
    elsif scholarship.discount >= 25 && scholarship.id.even? 
     array = ['FireBush', 'box box-theme'] 
    else 
     array = ['Mojo', 'box box-dark'] 
    end 
    array 
    end 
end 

Kann jemand mir helfen, den rspec Testcode dieser Methode zu schreiben?

Answer 1

Hier ist der Testcode der Methode:

RSpec.describe FrontendHelper, type: :helper do 
    describe '#scholarship_style_change(scholarship)' do 
    let!(:scholarship_group) { FactoryGirl.create :admin_scholarship_group } 
    let(:scholarship_50) { FactoryGirl.create :admin_scholarship, name: '50% off', discount: 50, condition: 'GPA 5', details: 'only GPA 5', group: scholarship_group } 
    let!(:scholarship_25) { FactoryGirl.create :admin_scholarship, name: '25% off', discount: 25, condition: 'GPA 4.25', details: 'only GPA 4.25', group: scholarship_group } 
    let!(:scholarship_20) { FactoryGirl.create :admin_scholarship, name: '20% off', discount: 20, condition: 'GPA 4', details: 'only GPA 4', group: scholarship_group } 
    let(:first_array) { ['OliveDrab', 'box box-border'] } 
    let(:second_array) { ['FireBush', 'box box-theme'] } 
    let(:third_array) { ['Mojo', 'box box-dark'] } 

    context 'checks above 50% scholarship' do 
     it 'returns first array' do 
     expect(scholarship_style_change(scholarship_50)).to eq(first_array) 
     end 
     it 'does not return second array' do 
     expect(scholarship_style_change(scholarship_50)).not_to eq(second_array) 
     end 
     it 'does not return third array' do 
     expect(scholarship_style_change(scholarship_50)).not_to eq(third_array) 
     end 
    end 

    context 'checks above 25% scholarship with even id' do 
     it 'does not return first array' do 
     expect(scholarship_style_change(scholarship_25)).not_to eq(first_array) 
     end 
     it 'does not return second array' do 
     expect(scholarship_style_change(scholarship_25)).not_to eq(second_array) 
     end 
     it 'returns third array' do 
     expect(scholarship_style_change(scholarship_25)).to eq(third_array) 
     end 
    end 

    context 'checks above 20% scholarship with odd id' do 
     it 'does not return first array' do 
     expect(scholarship_style_change(scholarship_20)).not_to eq(first_array) 
     end 
     it 'does not return second array' do 
     expect(scholarship_style_change(scholarship_20)).to eq(second_array) 
     end 
     it 'does_not return third array' do 
     expect(scholarship_style_change(scholarship_20)).not_to eq(third_array) 
     end 
    end 
    end 
end 

Answer 2

eine Dummy-Klasse erstellen, das Modul zu erweitern und testen Sie die Methode durch die Klasseninstanz

before(:each) do 
    @helper_class = Class.new { extend FrontEndHelper} 
    @helper_class.extend(FrontEndHelper) 
end 

it "returns OliveDrab and box-border if discount above 50 and with odd id" do 
    scholarship = double("scholarship", discount: 55, id: 7) 
    @helper_class.scholarship_style_change(scholarship).should eq(['OliveDrab', 'box box-border']) 
end