Allow postgres:///dbname as a local url

lib/database_cleaner/safeguard.rb

@@ -39,7 +39,7 @@ module DatabaseCleaner
 
 
     class RemoteDatabaseUrl
-      LOCAL = %w(localhost .local 127.0.0.1 sqlite3:)
+      LOCAL = %w(localhost 127.0.0.1)
 
       def run
         raise Error::RemoteDatabaseUrl if !skip? && given?
@@ -52,7 +52,16 @@ module DatabaseCleaner
         end
 
         def remote?(url)
-          url && !LOCAL.any? { |str| url.include?(str) }
+          return false unless url
+
+          parsed = URI.parse(url)
+          return false if parsed.scheme == 'sqlite3:'
+
+          host = parsed.host
+          return false unless host
+          return false if LOCAL.include?(host)
+          return false if host.end_with? '.local'
+          true
         end
 
         def skip?

spec/database_cleaner/safeguard_spec.rb

@@ -21,6 +21,14 @@ module DatabaseCleaner
         end
       end
 
+      describe 'to a local, empty-host url' do
+        let(:database_url) { 'postgres:///' }
+
+        it 'does not raise' do
+          expect { cleaner.start }.to_not raise_error
+        end
+      end
+
       describe 'to a local tld url' do
         let(:database_url) { 'postgres://postgres.local' }