added Response#raise_for_status, which raises an exception if the http code is an error code; it also duck-types the error response, which will raise its exception

lib/httpx/response.rb

@@ -60,6 +60,11 @@ module HTTPX
       "#<Response:#{object_id} @status=#{@status} @headers=#{@headers}>"
     end
 
+    def raise_for_status
+      return if @status < 400
+      raise HTTPError, @status
+    end
+
     class Body
       def initialize(response, threshold_size:, window_size: 1 << 14)
         @response = response
@@ -224,6 +229,10 @@ module HTTPX
       @error.message
     end
 
+    def raise_for_status
+      raise @error
+    end
+
     def retryable?
       @retries.positive?
     end

test/response_test.rb

@@ -22,6 +22,17 @@ class ResponseTest < Minitest::Test
     assert resource.body == "data", "body should have been updated"
   end
 
+  def test_raise_for_status
+    r1 = Response.new(request, 200, "2.0", {})
+    r1.raise_for_status
+    r2 = Response.new(request, 302, "2.0", {})
+    r2.raise_for_status
+    r3 = Response.new(request, 404, "2.0", {})
+    assert_raises(HTTPX::HTTPError) { r3.raise_for_status }
+    r4 = Response.new(request, 500, "2.0", {})
+    assert_raises(HTTPX::HTTPError) { r4.raise_for_status }
+  end
+  
   def test_response_body_to_s
     opts = { threshold_size: 1024 }
     body1 = Response::Body.new(Response.new(request, 200, "2.0", {}), opts)