Import specs: Add tests to verify dependent-destroy of associations

When an import is destroyed, all:

* child imports
* associated `ImportReference`s
* associated `ImportMessage`s

must be destroyed. This is handled by a `dependent: :destory` on the
associations.

Here we add tests to validate that the records get properly destroyed.

Refs #4412

1 files changed, 29 insertions, 6 deletions

diff --git a/spec/models/import_spec.rb b/spec/models/import_spec.rb
index 477d269e0..cd5a30982 100644
--- a/spec/models/import_spec.rb
+++ b/spec/models/import_spec.rb
@@ -26,12 +26,35 @@ RSpec.describe Import, type: :model do
     )
   end
 
-  # describe "#destroy" do
-  #   it "must call #destroy on imports children and then import_messages, import_resources linked" do
-  #     TODO
-  #
-  #   end
-  # end
+  describe "#destroy" do
+    it "must destroy all child imports" do
+      workbench_import = create(:workbench_import)
+      create(:netex_import, parent: workbench_import)
+
+      workbench_import.destroy
+
+      expect(workbench_import).to be_destroyed
+      expect(NetexImport.count).to eq(0)
+    end
+
+    it "must destroy all associated ImportMessages" do
+      import = create(:import)
+      create(:import_resource, import: import)
+
+      import.destroy
+
+      expect(ImportResource.count).to eq(0)
+    end
+
+    it "must destroy all associated ImportResources" do
+      import = create(:import)
+      create(:import_message, import: import)
+
+      import.destroy
+
+      expect(ImportMessage.count).to eq(0)
+    end
+  end
 
   describe "#notify_parent" do
     it "must call #child_change on its parent" do