allow integers only

spec/models/champs/dossier_link_champ_spec.rb

@@ -0,0 +1,37 @@
+describe Champs::DossierLinkChamp, type: :model do
+  describe 'prefilling validations' do
+    describe 'value' do
+      subject { build(:champ_dossier_link, value: value).valid?(:prefill) }
+
+      context 'when nil' do
+        let(:value) { nil }
+
+        it { expect(subject).to eq(true) }
+      end
+
+      context 'when empty' do
+        let(:value) { '' }
+
+        it { expect(subject).to eq(true) }
+      end
+
+      context 'when an integer' do
+        let(:value) { 42 }
+
+        it { expect(subject).to eq(true) }
+      end
+
+      context 'when a string representing an integer' do
+        let(:value) { "42" }
+
+        it { expect(subject).to eq(true) }
+      end
+
+      context 'when it can be casted as integer' do
+        let(:value) { 'totoro' }
+
+        it { expect(subject).to eq(false) }
+      end
+    end
+  end
+end