fix rails server support of RAILS_ENV variable

When launching rails server from the command line with a rails environment specified such as `rails server RAILS_ENV=production` an error would occur since rails will try to use `RAILS_ENV=production` as it's server. 

When launching rails with a specified server such as thin `rails server thin RAILS_ENV=production` no error will be thrown, but rails will not start up in the specified environment.

This fixes both of those cases

1 files changed, 26 insertions, 0 deletions

diff --git a/railties/test/commands/server_test.rb b/railties/test/commands/server_test.rb
new file mode 100644
index 0000000000..8039aec873
--- /dev/null
+++ b/railties/test/commands/server_test.rb
@@ -0,0 +1,26 @@
+require 'abstract_unit'
+require 'rails/commands/server'
+
+class Rails::ServerTest < ActiveSupport::TestCase
+
+  def test_environment_with_server_option
+    args    = ["thin", "RAILS_ENV=production"]
+    options = Rails::Server::Options.new.parse!(args)
+    assert_equal 'production', options[:environment]
+    assert_equal 'thin', options[:server]
+  end
+
+  def test_environment_without_server_option
+    args    = ["RAILS_ENV=production"]
+    options = Rails::Server::Options.new.parse!(args)
+    assert_equal 'production', options[:environment]
+    assert_nil options[:server]
+  end
+
+  def test_server_option_without_environment
+    args    = ["thin"]
+    options = Rails::Server::Options.new.parse!(args)
+    assert_nil options[:environment]
+    assert_equal 'thin', options[:server]
+  end
+end