Merge pull request #6 from youssefeladawy/implement-rspec-for-donatio…

…n-model Create a model spec for donation
rubyforgood · Oct 20, 2023 · 6a2c3de · 6a2c3de
2 parents b4eaf00 + 303a0af
commit 6a2c3de
Showing 1 changed file with 48 additions and 0 deletions.
diff --git a/spec/models/donation_spec.rb b/spec/models/donation_spec.rb
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+require 'rails_helper'
+
+RSpec.describe Donation, type: :model do
+  context 'validations' do
+    context 'when there are no amount and/or currency values' do
+      it 'requires the presence of amount and currency' do
+        donation = Donation.new
+        donation.valid?
+        expect(donation.errors[:amount]).to include("can't be blank")
+        expect(donation.errors[:currency]).to include("can't be blank")
+      end
+    end
+  end
+
+  describe '.sum_donations_by_currency' do
+    context 'when the amount values valid numbers' do
+      before do
+        Donation.create!(amount: '5', currency: 'biscuits')
+        Donation.create!(amount: '2', currency: 'biscuits')
+        Donation.create!(amount: '10', currency: 'treats')
+      end
+
+      it 'returns the sum of donations by currency' do
+        expected = { 'biscuits' => 7, 'treats' => 10 }
+        expect(Donation.sum_donations_by_currency).to eq(expected)
+      end
+    end
+
+    context 'when amount is not a valid number' do
+      before do
+        Donation.create!(amount: '5', currency: 'USD')
+        Donation.create!(amount: 'invalid', currency: 'USD')
+        Donation.create!(amount: '10', currency: 'EUR')
+      end
+
+      it 'ignores the invalid amount and sums the valid amounts' do
+        expected = { 'USD' => 5.0, 'EUR' => 10.0 }
+        expect(Donation.sum_donations_by_currency).to eq(expected)
+      end
+    end
+
+    context 'when there are no donations' do
+      it 'returns an empty hash' do
+        expect(Donation.sum_donations_by_currency).to eq({})
+      end
+    end
+  end
+end