Skip conventional sqlite:// URLs from safeguards (#715)

Update Safeguard::RemoteDatabaseUrl to skip URLs like "sqlite://path/to/file.sqlite”, which is now the conventional format for URLs to SQLite databases when using libraries like Sequel.

lib/database_cleaner/safeguard.rb

@@ -1,3 +1,5 @@
+require "uri"
+
 module DatabaseCleaner
   class Safeguard
     class Error < Exception
@@ -42,7 +44,8 @@ class RemoteDatabaseUrl
       LOCAL = %w(localhost 127.0.0.1)
 
       def run
-        raise Error::RemoteDatabaseUrl if !skip? && given?
+        return if skip?
+        raise Error::RemoteDatabaseUrl if given?
       end
 
       private
@@ -54,7 +57,7 @@ def given?
         def remote?(url)
           return false unless url
           parsed = URI.parse(url)
-          return false if parsed.scheme == 'sqlite3:'
+          return false if parsed.scheme == 'sqlite' || parsed.scheme == 'sqlite3'
 
           host = parsed.host
           return false if host.nil? || host.empty?

spec/database_cleaner/safeguard_spec.rb

@@ -45,7 +45,23 @@ module DatabaseCleaner
         end
       end
 
-      describe 'to a sqlite db' do
+      describe 'to a sqlite url' do
+        let(:database_url) { 'sqlite://tmp/db.sqlite3' }
+
+        it 'does not raise' do
+          expect { cleaner.start }.to_not raise_error
+        end
+      end
+
+      describe 'to a sqlite3 url' do
+        let(:database_url) { 'sqlite3://tmp/db.sqlite3' }
+
+        it 'does not raise' do
+          expect { cleaner.start }.to_not raise_error
+        end
+      end
+
+      describe 'to a sqlite3 url with no slashes after the scheme' do
         let(:database_url) { 'sqlite3:tmp/db.sqlite3' }
 
         it 'does not raise' do