Implement @rymai's feedback after review.

- Separate 'exercise' and 'verify' steps of tests.
- Use `build_stubbed` instead of `build`

spec/lib/banzai/filter/wiki_link_filter_spec.rb

@@ -3,8 +3,8 @@ require 'spec_helper'
 describe Banzai::Filter::WikiLinkFilter, lib: true do
   include FilterSpecHelper
 
-  let(:namespace) { build(:namespace, name: "wiki_link_ns") }
-  let(:project)   { build(:empty_project, :public, name: "wiki_link_project", namespace: namespace) }
+  let(:namespace) { build_stubbed(:namespace, name: "wiki_link_ns") }
+  let(:project)   { build_stubbed(:empty_project, :public, name: "wiki_link_project", namespace: namespace) }
   let(:user) { double }
   let(:project_wiki) { ProjectWiki.new(project, user) }
 
@@ -13,12 +13,14 @@ describe Banzai::Filter::WikiLinkFilter, lib: true do
       it "doesn't rewrite non-file links" do
         link = "<a href='./page'>Link to Page</a>"
         filtered_link = filter(link, project_wiki: project_wiki).children[0]
+
         expect(filtered_link.attribute('href').value).to eq('./page')
       end
 
       it "doesn't rewrite file links" do
         link = "<a href='./page.md'>Link to Page</a>"
         filtered_link = filter(link, project_wiki: project_wiki).children[0]
+
         expect(filtered_link.attribute('href').value).to eq('./page.md')
       end
     end
@@ -27,12 +29,14 @@ describe Banzai::Filter::WikiLinkFilter, lib: true do
       it "doesn't rewrite non-file links" do
         link = "<a href='../page'>Link to Page</a>"
         filtered_link = filter(link, project_wiki: project_wiki).children[0]
+
         expect(filtered_link.attribute('href').value).to eq('../page')
       end
 
       it "doesn't rewrite file links" do
         link = "<a href='../page.md'>Link to Page</a>"
         filtered_link = filter(link, project_wiki: project_wiki).children[0]
+
         expect(filtered_link.attribute('href').value).to eq('../page.md')
       end
     end
@@ -41,12 +45,14 @@ describe Banzai::Filter::WikiLinkFilter, lib: true do
       it "doesn't rewrite non-file links" do
         link = "<a href='./subdirectory/page'>Link to Page</a>"
         filtered_link = filter(link, project_wiki: project_wiki).children[0]
+
         expect(filtered_link.attribute('href').value).to eq('./subdirectory/page')
       end
 
       it "doesn't rewrite file links" do
         link = "<a href='./subdirectory/page.md'>Link to Page</a>"
         filtered_link = filter(link, project_wiki: project_wiki).children[0]
+
         expect(filtered_link.attribute('href').value).to eq('./subdirectory/page.md')
       end
     end
@@ -62,6 +68,7 @@ describe Banzai::Filter::WikiLinkFilter, lib: true do
       it "doesn't rewrite file links" do
         link = "<a href='page.md'>Link to Page</a>"
         filtered_link = filter(link, project_wiki: project_wiki).children[0]
+
         expect(filtered_link.attribute('href').value).to eq('page.md')
       end
     end
@@ -71,6 +78,7 @@ describe Banzai::Filter::WikiLinkFilter, lib: true do
     it "doesn't rewrite links" do
       link = "<a href='http://example.com/page'>Link to Page</a>"
       filtered_link = filter(link, project_wiki: project_wiki).children[0]
+
       expect(filtered_link.attribute('href').value).to eq('http://example.com/page')
     end
   end