Test to see if nil imported_asset_path works.

features/test_cases/imported_asset_path_nil.feature

@@ -0,0 +1,79 @@
+Feature: Imported assets are built with the correct extensions without any asset path prefix
+
+  Background:
+    Given a fixture app "base-app"
+    And a file named "config.rb" with:
+      """
+      activate :sprockets do |config|
+        config.imported_asset_path = nil
+      end
+      sprockets.append_path File.join(root, 'vendor')
+      """
+    And a file named "vendor/fonts/webfont-vendor.svg" with:
+      """
+      """
+    And a file named "vendor/fonts/webfont-vendor.svg.gz" with:
+      """
+      """
+    And a file named "vendor/fonts/webfont-vendor.ttf.gz" with:
+      """
+      """
+    And a file named "source/fonts/webfont-source.svg" with:
+      """
+      """
+    And a file named "source/fonts/webfont-source.svg.gz" with:
+      """
+      """
+    And a file named "source/fonts/webfont-source.ttf.gz" with:
+      """
+      """
+    And a file named "vendor/images/drawing-vendor.svg" with:
+      """
+      """
+    And a file named "source/images/drawing-source.svg" with:
+      """
+      """
+    And a file named "vendor/images/extensions-source.svg.gz" with:
+      """
+      """
+    And a file named "vendor/images/extensions-source.min.js" with:
+      """
+      """
+    And a file named "vendor/images/extensions-source.asdf.asdf.min.js.asdf" with:
+      """
+      """
+
+
+  Scenario: Assets built by being linked are built with the right extension
+    Given a file named "source/stylesheets/manifest.css" with:
+      """
+      //= link 'fonts/webfont-vendor.svg'
+      //= link 'fonts/webfont-vendor.svg.gz'
+      //= link 'fonts/webfont-vendor.ttf.gz'
+      //= link 'images/drawing-vendor.svg'
+      //= link 'images/extensions-source.svg.gz'
+      //= link 'images/extensions-source.min.js'
+      //= link 'images/extensions-source.asdf.asdf.min.js.asdf'
+      """
+    And a successfully built app
+
+    When I cd to "build"
+    Then the following files should exist:
+      | fonts/webfont-vendor.svg |
+      | fonts/webfont-vendor.svg.gz |
+      | fonts/webfont-vendor.ttf.gz |
+      | images/drawing-vendor.svg |
+      | images/extensions-source.svg.gz |
+      | images/extensions-source.min.js |
+      | images/extensions-source.asdf.asdf.min.js.asdf |
+
+  Scenario: Assets in source don't have their extensions mangled
+    Given a successfully built app
+
+    When I cd to "build"
+    Then the following files should exist:
+      | fonts/webfont-source.svg |
+      | fonts/webfont-source.svg.gz |
+      | fonts/webfont-source.ttf.gz |
+      | images/drawing-source.svg |
+