Rakefile in boolean_timestamp-0.1.0 vs Rakefile in boolean_timestamp-0.2.0

@@ -1,6 +1,33 @@
 require "bundler/gem_tasks"
 require "rspec/core/rake_task"
 
 RSpec::Core::RakeTask.new(:spec)
 
-task :default => :spec
+namespace :spec do
+  desc "Run tests with sqlite3 adapter"
+  task :sqlite do
+    ENV["DB_ADAPTER"] = "sqlite"
+    Rake::Task["spec"].execute
+  end
+
+  desc "Run tests with mysql2 adapter"
+  task :mysql do
+    ENV["DB_ADAPTER"] = "mysql"
+    Rake::Task["spec"].execute
+  end
+
+  desc "Run tests with postgresql adapter"
+  task :postgres do
+    ENV["DB_ADAPTER"] = "postgres"
+    Rake::Task["spec"].execute
+  end
+
+  desc "Run tests with all adapters"
+  task :all do
+    Rake::Task["spec:sqlite"].execute
+    Rake::Task["spec:mysql"].execute
+    Rake::Task["spec:postgres"].execute
+  end
+end
+
+task default: :spec