Handling headers passed as an array in Curb.

lib/webmock/http_lib_adapters/curb_adapter.rb

@@ -98,11 +98,23 @@ def build_request_signature
           method,
           uri.to_s,
           :body => request_body,
-          :headers => self.headers.merge(basic_auth_headers)
+          :headers => headers_as_hash(self.headers).merge(basic_auth_headers)
         )
         request_signature
       end
 
+      def headers_as_hash(headers)
+        if headers.is_a?(Array)
+          headers.inject({}) {|hash, header|
+            name, value = header.split(":").map(&:strip)
+            hash[name] = value
+            hash
+          }
+        else
+          headers
+        end
+      end
+
       def basic_auth_headers
         if self.username
           {'Authorization' => WebMock::Util::Headers.basic_auth_header(self.username, self.password)}

spec/acceptance/curb/curb_spec.rb

@@ -355,6 +355,16 @@
         c.http(:GET)
         expect(c.body).to eq("abc")
       end
+
+      it "supports array headers passed to Curl::Easy" do
+        stub_request(:get, "www.example.com").with(headers: {'X-One' => '1'}).to_return(:body => "abc")
+
+        c = Curl::Easy.new
+        c.url = "http://www.example.com"
+        c.headers = ["X-One: 1"]
+        c.http(:GET)
+        expect(c.body).to eq("abc")
+      end
     end
 
     describe "using #http_* methods for requests" do