Fix Railties tests

These tests have never run in CI due to CI using a root user. This
commit keeps that behavior without using the skip so that we can enable
raise on skips.

Author: skipkayhil

railties/test/application/rake/dbs_test.rb

@@ -232,23 +232,32 @@ def with_database_existing
 
       def with_bad_permissions
         Dir.chdir(app_path) do
-          skip "Can't avoid permissions as root" if Process.uid.zero?
-
           set_database_url
           FileUtils.chmod("-w", "db")
           yield
           FileUtils.chmod("+w", "db")
         end
       end
 
-      test "db:create failure because bad permissions" do
-        with_bad_permissions do
-          output = rails("db:create", allow_failure: true)
-          assert_match("Couldn't create '#{database_url_db_name}' database. Please check your configuration.", output)
-          assert_equal 1, $?.exitstatus
+      unless Process.uid.zero?
+        test "db:create failure because bad permissions" do
+          with_bad_permissions do
+            output = rails("db:create", allow_failure: true)
+            assert_match("Couldn't create '#{database_url_db_name}' database. Please check your configuration.", output)
+            assert_equal 1, $?.exitstatus
+          end
         end
-      end
 
+        test "db:drop failure because bad permissions" do
+          with_database_existing do
+            with_bad_permissions do
+              output = rails("db:drop", allow_failure: true)
+              assert_match(/Couldn't drop/, output)
+              assert_equal 1, $?.exitstatus
+            end
+          end
+        end
+      end
       test "db:create works when schema cache exists and database does not exist" do
         use_postgresql
 
@@ -268,16 +277,6 @@ def with_bad_permissions
         assert_match(/does not exist/, output)
       end
 
-      test "db:drop failure because bad permissions" do
-        with_database_existing do
-          with_bad_permissions do
-            output = rails("db:drop", allow_failure: true)
-            assert_match(/Couldn't drop/, output)
-            assert_equal 1, $?.exitstatus
-          end
-        end
-      end
-
       test "db:truncate_all truncates all non-internal tables" do
         Dir.chdir(app_path) do
           rails "generate", "model", "book", "title:string"