Fix some sqlite3 foreign key tests

Author: rdubya

lib/arjdbc/sqlite3/adapter.rb

@@ -354,14 +354,23 @@ def add_reference(table_name, ref_name, **options) # :nodoc:
     alias :add_belongs_to :add_reference
 
     def foreign_keys(table_name)
+      # SQLite returns 1 row for each column of composite foreign keys.
       fk_info = internal_exec_query("PRAGMA foreign_key_list(#{quote(table_name)})", "SCHEMA")
-      fk_info.map do |row|
+      grouped_fk = fk_info.group_by { |row| row["id"] }.values.each { |group| group.sort_by! { |row| row["seq"] } }
+      grouped_fk.map do |group|
+        row = group.first
         options = {
-          column: row["from"],
-          primary_key: row["to"],
           on_delete: extract_foreign_key_action(row["on_delete"]),
           on_update: extract_foreign_key_action(row["on_update"])
         }
+
+        if group.one?
+          options[:column] = row["from"]
+          options[:primary_key] = row["to"]
+        else
+          options[:column] = group.map { |row| row["from"] }
+          options[:primary_key] = group.map { |row| row["to"] }
+        end
         # DIFFERENCE: FQN
         ::ActiveRecord::ConnectionAdapters::ForeignKeyDefinition.new(table_name, row["table"], options)
       end