1 files changed, 29 insertions, 0 deletions
diff --git a/spec/models/packages/composer/metadatum_spec.rb b/spec/models/packages/composer/metadatum_spec.rb
index 1c888f1563c..326eba7aa0e 100644
--- a/spec/models/packages/composer/metadatum_spec.rb
+++ b/spec/models/packages/composer/metadatum_spec.rb
@@ -10,6 +10,35 @@ RSpec.describe Packages::Composer::Metadatum, type: :model do
     it { is_expected.to validate_presence_of(:package) }
     it { is_expected.to validate_presence_of(:target_sha) }
     it { is_expected.to validate_presence_of(:composer_json) }
+
+    describe '#composer_package_type' do
+      subject { build(:composer_metadatum, package: package) }
+
+      shared_examples 'an invalid record' do
+        it do
+          expect(subject).not_to be_valid
+          expect(subject.errors.to_a).to include('Package type must be Composer')
+        end
+      end
+
+      context 'when the metadatum package_type is Composer' do
+        let(:package) { build(:composer_package) }
+
+        it { is_expected.to be_valid }
+      end
+
+      context 'when the metadatum has no associated package' do
+        let(:package) { nil }
+
+        it_behaves_like 'an invalid record'
+      end
+
+      context 'when the metadatum package_type is not Composer' do
+        let(:package) { build(:npm_package) }
+
+        it_behaves_like 'an invalid record'
+      end
+    end
   end
 
   describe 'scopes' do