DEV: Split slow test in multiple smaller tests

This might be faster because the  smaller chunks of the test may run in
parallel.

spec/lib/stylesheet/manager_spec.rb

@@ -859,63 +859,59 @@ RSpec.describe Stylesheet::Manager do
       %w[desktop mobile admin wizard desktop_rtl mobile_rtl admin_rtl wizard_rtl]
     end
 
-    before { STDERR.stubs(:write) }
+    let(:theme_targets) { %i[desktop_theme mobile_theme] }
+
+    before do
+      STDERR.stubs(:write)
+      StylesheetCache.destroy_all
+      default_theme.set_default!
+    end
 
     after do
       STDERR.unstub(:write)
       Stylesheet::Manager.rm_cache_folder
     end
 
-    it "correctly generates precompiled CSS" do
-      scheme1 = ColorScheme.create!(name: "scheme1")
-      scheme2 = ColorScheme.create!(name: "scheme2")
-      theme_targets = %i[desktop_theme mobile_theme]
+    fab!(:scheme1) { ColorScheme.create!(name: "scheme1") }
+    fab!(:scheme2) { ColorScheme.create!(name: "scheme2") }
 
-      Theme.update_all(user_selectable: false)
-      user_theme = Fabricate(:theme, user_selectable: true, color_scheme: scheme1)
-      default_theme = Fabricate(:theme, user_selectable: true, color_scheme: scheme2)
+    fab!(:user_theme) { Fabricate(:theme, user_selectable: true, color_scheme: scheme1) }
+    fab!(:default_theme) { Fabricate(:theme, user_selectable: true, color_scheme: scheme2) }
+    fab!(:child_theme) do
+      Fabricate(:theme).tap do |t|
+        t.component = true
+        t.save!
+        user_theme.add_relative_theme!(:child, t)
+      end
+    end
+    fab!(:child_theme_with_css) do
+      Fabricate(:theme).tap do |t|
+        t.component = true
+        t.set_field(target: :common, name: :scss, value: "body { background: green }")
+        t.save!
+        user_theme.add_relative_theme!(:child, t)
+        default_theme.add_relative_theme!(:child, t)
+      end
+    end
 
-      child_theme =
-        Fabricate(:theme).tap do |t|
-          t.component = true
-          t.save!
-          user_theme.add_relative_theme!(:child, t)
-        end
+    it "generates precompiled CSS - only core" do
+      capture_output(:stderr) { Stylesheet::Manager.precompile_css }
 
-      child_theme_with_css =
-        Fabricate(:theme).tap do |t|
-          t.component = true
+      expect(StylesheetCache.pluck(:target)).to contain_exactly(*core_targets)
+    end
 
-          t.set_field(target: :common, name: :scss, value: "body { background: green }")
-
-          t.save!
-
-          user_theme.add_relative_theme!(:child, t)
-          default_theme.add_relative_theme!(:child, t)
-        end
-
-      default_theme.set_default!
-
-      StylesheetCache.destroy_all
-
-      # only core
-      output = capture_output(:stderr) { Stylesheet::Manager.precompile_css }
-
-      results = StylesheetCache.pluck(:target)
-      expect(results).to contain_exactly(*core_targets)
-
-      StylesheetCache.destroy_all
-
-      # only themes
+    it "generates precompiled CSS - only themes" do
       output = capture_output(:stderr) { Stylesheet::Manager.precompile_theme_css }
 
       # Ensure we force compile each theme only once
       expect(output.scan(/#{child_theme_with_css.name}/).length).to eq(2)
-      results = StylesheetCache.pluck(:target)
-      expect(results.size).to eq(22) # (3 themes * 2 targets) + 16 color schemes (2 themes * 8 color schemes (7 defaults + 1 theme scheme))
+      expect(StylesheetCache.count).to eq(22) # (3 themes * 2 targets) + 16 color schemes (2 themes * 8 color schemes (7 defaults + 1 theme scheme))
+    end
 
-      # themes + core
+    it "generates precompiled CSS - core and themes" do
       Stylesheet::Manager.precompile_css
+      Stylesheet::Manager.precompile_theme_css
+
       results = StylesheetCache.pluck(:target)
       expect(results.size).to eq(30) # 11 core targets + 9 theme + 10 color schemes
 
@@ -924,13 +920,14 @@ RSpec.describe Stylesheet::Manager do
           results.count { |target| target =~ /^#{tar}_(#{user_theme.id}|#{default_theme.id})$/ },
         ).to eq(2)
       end
+    end
 
+    it "correctly generates precompiled CSS - core and themes and no default theme" do
       Theme.clear_default!
-      StylesheetCache.destroy_all
 
-      # themes + core with no theme set as default
       Stylesheet::Manager.precompile_css
       Stylesheet::Manager.precompile_theme_css
+
       results = StylesheetCache.pluck(:target)
       expect(results.size).to eq(30) # 11 core targets + 9 theme + 10 color schemes
 
@@ -948,33 +945,24 @@ RSpec.describe Stylesheet::Manager do
       image = file_from_fixtures("logo.png")
       upload = UploadCreator.new(image, "logo.png").create_for(-1)
 
-      scheme = ColorScheme.create!(name: "scheme")
-      theme_targets = %i[desktop_theme mobile_theme]
+      ThemeField.create!(
+        theme_id: default_theme.id,
+        target_id: Theme.targets[:common],
+        name: "logo",
+        value: "",
+        upload_id: upload.id,
+        type_id: ThemeField.types[:theme_upload_var],
+      )
 
-      default_theme =
-        Fabricate(:theme, color_scheme: scheme).tap do |t|
-          field =
-            ThemeField.create!(
-              theme_id: t.id,
-              target_id: Theme.targets[:common],
-              name: "logo",
-              value: "",
-              upload_id: upload.id,
-              type_id: ThemeField.types[:theme_upload_var],
-            )
+      default_theme.set_field(
+        target: :common,
+        name: :scss,
+        value: "body { background: url($logo); border: 3px solid green; }",
+      )
 
-          t.set_field(
-            target: :common,
-            name: :scss,
-            value: "body { background: url($logo); border: 3px solid green; }",
-          )
+      default_theme.save!
 
-          t.save!
-        end
-
-      default_theme.set_default!
       upload.destroy!
-      StylesheetCache.destroy_all
 
       Stylesheet::Manager.precompile_theme_css