SPEC: Require "status" to be Integer and >= 100

  - #1644 refers to the idea "require Status to be an Integer"
  - This implements that change

SPEC.rdoc

@@ -246,8 +246,8 @@ if the request env has <tt>rack.hijack?</tt> <tt>true</tt>.
   request pattern is intended to provide the hijacker with "raw tcp".
 == The Response
 === The Status
-This is an HTTP status. When parsed as integer (+to_i+), it must be
-greater than or equal to 100.
+This is an HTTP status. It must be an Integer greater than or equal to
+100.
 === The Headers
 The header must respond to +each+, and yield values of key and value.
 The header keys must be Strings.

lib/rack/lint.rb

@@ -659,9 +659,11 @@ def check_hijack_response(headers, env)
 
     ## === The Status
     def check_status(status)
-      ## This is an HTTP status. When parsed as integer (+to_i+), it must be
-      ## greater than or equal to 100.
-      assert("Status must be >=100 seen as integer") { status.to_i >= 100 }
+      ## This is an HTTP status. It must be an Integer greater than or equal to
+      ## 100.
+      assert("Status must be an Integer >=100") {
+        status.is_a?(Integer) && status >= 100
+      }
     end
 
     ## === The Headers

test/spec_content_type.rb

@@ -44,12 +44,4 @@ def request
       response[1]['Content-Type'].must_be_nil
     end
   end
-
-  ['100', '204', '304'].each do |code|
-    it "not set Content-Type on #{code} responses if status is a string" do
-      app = lambda { |env| [code, {}, []] }
-      response = content_type(app, "text/html").call(request)
-      response[1]['Content-Type'].must_be_nil
-    end
-  end
 end

test/spec_lint.rb

@@ -266,14 +266,21 @@ def result.name
                        ["cc", {}, ""]
                      }).call(env({}))
     }.must_raise(Rack::Lint::LintError).
-      message.must_match(/must be >=100 seen as integer/)
+      message.must_match(/must be an Integer >=100/)
 
     lambda {
       Rack::Lint.new(lambda { |env|
                        [42, {}, ""]
                      }).call(env({}))
     }.must_raise(Rack::Lint::LintError).
-      message.must_match(/must be >=100 seen as integer/)
+      message.must_match(/must be an Integer >=100/)
+
+    lambda {
+      Rack::Lint.new(lambda { |env|
+                       ["200", {}, ""]
+                     }).call(env({}))
+    }.must_raise(Rack::Lint::LintError).
+      message.must_match(/must be an Integer >=100/)
   end
 
   it "notice header errors" do