Update taxon specs

spec/models/enterprise_spec.rb

@@ -677,8 +677,8 @@ describe Enterprise do
     let(:taxon1) { create(:taxon) }
     let(:taxon2) { create(:taxon) }
     let(:taxon3) { create(:taxon) }
-    let(:product1) { create(:simple_product, primary_taxon: taxon1, taxons: [taxon1]) }
-    let(:product2) { create(:simple_product, primary_taxon: taxon1, taxons: [taxon1, taxon2]) }
+    let(:product1) { create(:simple_product, primary_taxon: taxon1) }
+    let(:product2) { create(:simple_product, primary_taxon: taxon2) }
     let(:product3) { create(:simple_product, primary_taxon: taxon3) }
     let(:oc) { create(:order_cycle) }
     let(:ex) {

spec/models/spree/classification_spec.rb

@@ -1,22 +0,0 @@
-# frozen_string_literal: true
-
-require 'spec_helper'
-
-module Spree
-  describe Classification do
-    let(:product) { create(:simple_product) }
-    let(:taxon) { create(:taxon) }
-
-    it "won't destroy if classification is the primary taxon" do
-      classification = Classification.create(taxon: taxon, product: product)
-      product.update(primary_taxon: taxon)
-
-      expect(classification.destroy).to be false
-      expect(classification.errors.messages[:base])
-        .to eq(
-          ["Taxon #{taxon.name} is the primary taxon of #{product.name} and cannot be deleted"]
-        )
-      expect(classification.reload).to be
-    end
-  end
-end

spec/models/spree/taxon_spec.rb

@@ -11,10 +11,10 @@ module Spree
     let(:t2) { create(:taxon) }
 
     describe "finding all supplied taxons" do
-      let!(:p1) { create(:simple_product, supplier: e, taxons: [t1, t2]) }
+      let!(:p1) { create(:simple_product, supplier: e, primary_taxon_id: t1.id) }
 
       it "finds taxons" do
-        expect(Taxon.supplied_taxons).to eq(e.id => Set.new(p1.taxons.map(&:id)))
+        expect(Taxon.supplied_taxons).to eq(e.id => Set.new([t1.id]))
       end
     end