Test case for conditional http response.

git-svn-id: svn+ssh://rubyforge.org/var/svn/mongrel/trunk@164 19e92222-5c0b-0410-8929-a290d50e31e9

test/test_conditional.rb

@@ -0,0 +1,100 @@
+require 'test/unit'
+require 'net/http'
+require 'mongrel'
+
+include Mongrel
+
+class HttpParserTest < Test::Unit::TestCase
+  def setup
+    @h = HttpServer.new('0.0.0.0', 3001)
+    @h.register('/', Mongrel::DirHandler.new('.'))
+    @h.run
+
+    @http = Net::HTTP.new(@h.host, @h.port)
+
+    # get the ETag and Last-Modified headers
+    @path = '/README'
+    res = @http.start { |http| http.get(@path) }
+    @etag = res['ETag']
+    @last_modified = res['Last-Modified']
+  end
+
+  def teardown
+    orig_stderr = STDERR.dup
+
+    # temporarily disable the puts method in STDERR to silence warnings from stop
+    class << STDERR
+      define_method(:puts) {}
+    end
+
+    @h.stop
+  ensure
+    # restore STDERR
+    STDERR.reopen(orig_stderr)
+  end
+
+  # status should be 304 Not Modified when If-None-Match is the matching ETag
+  def test_not_modified_via_if_none_match
+    assert_status_for_get_and_head Net::HTTPNotModified, 'If-None-Match' => @etag
+  end
+
+  # status should be 304 Not Modified when If-Unmodified-Since is the matching Last-Modified date
+  def test_not_modified_via_if_unmodified_since
+    assert_status_for_get_and_head Net::HTTPNotModified, 'If-Unmodified-Since' => @last_modified
+  end
+
+  # status should be 304 Not Modified when If-None-Match is the matching ETag
+  # and If-Unmodified-Since is the matching Last-Modified date
+  def test_not_modified_via_if_none_match_and_if_unmodified_since
+    assert_status_for_get_and_head Net::HTTPNotModified, 'If-None-Match' => @etag, 'If-Unmodified-Since' => @last_modified
+  end
+
+  # status should be 200 OK when If-None-Match is invalid
+  def test_invalid_if_none_match
+    assert_status_for_get_and_head Net::HTTPOK, 'If-None-Match' => 'invalid'
+    assert_status_for_get_and_head Net::HTTPOK, 'If-None-Match' => 'invalid', 'If-Unmodified-Since' => @last_modified
+  end
+
+  # status should be 200 OK when If-Unmodified-Since is invalid
+  def test_invalid_if_unmodified_since
+    assert_status_for_get_and_head Net::HTTPOK,                           'If-Unmodified-Since' => 'invalid'
+    assert_status_for_get_and_head Net::HTTPOK, 'If-None-Match' => @etag, 'If-Unmodified-Since' => 'invalid'
+  end
+
+  # status should be 304 Not Modified when If-Unmodified-Since is greater than the Last-Modified header, but less than the system time
+  def test_if_unmodified_since_greater_than_last_modified
+    sleep 2
+    last_modified_plus_1 = (Time.httpdate(@last_modified) + 1).httpdate
+    assert_status_for_get_and_head Net::HTTPNotModified,                           'If-Unmodified-Since' => last_modified_plus_1
+    assert_status_for_get_and_head Net::HTTPNotModified, 'If-None-Match' => @etag, 'If-Unmodified-Since' => last_modified_plus_1
+  end
+
+  # status should be 200 OK when If-Unmodified-Since is less than the Last-Modified header
+  def test_if_unmodified_since_less_than_last_modified
+    last_modified_minus_1 = (Time.httpdate(@last_modified) - 1).httpdate
+    assert_status_for_get_and_head Net::HTTPOK,                           'If-Unmodified-Since' => last_modified_minus_1
+    assert_status_for_get_and_head Net::HTTPOK, 'If-None-Match' => @etag, 'If-Unmodified-Since' => last_modified_minus_1
+  end
+
+  # status should be 200 OK when If-Unmodified-Since is a date in the future
+  def test_future_if_unmodified_since
+    the_future = Time.at(2**31-1).httpdate
+    assert_status_for_get_and_head Net::HTTPOK,                           'If-Unmodified-Since' => the_future
+    assert_status_for_get_and_head Net::HTTPOK, 'If-None-Match' => @etag, 'If-Unmodified-Since' => the_future
+  end
+
+  # status should be 200 OK when If-None-Match is a wildcard
+  def test_wildcard_match
+    assert_status_for_get_and_head Net::HTTPOK, 'If-None-Match' => '*'
+    assert_status_for_get_and_head Net::HTTPOK, 'If-None-Match' => '*', 'If-Unmodified-Since' => @last_modified
+  end
+
+  private
+
+    # assert the response status is correct for GET and HEAD
+    def assert_status_for_get_and_head(status_class, headers = {})
+      %w{ get head }.each do |method|
+        assert_kind_of status_class, @http.send(method, @path, headers)
+      end
+    end
+end