From 88c52865e3ef64dad036214c973a14eda967bdbc Mon Sep 17 00:00:00 2001
From: Thiago Romano <thiagopromano@gmail.com>
Date: Mon, 9 May 2022 16:48:44 +0200
Subject: [PATCH] Added test case and documentation

---
 lib/tesla/adapter/hackney.ex        |  4 ++++
 test/tesla/adapter/hackney_test.exs | 12 ++++++++++++
 2 files changed, 16 insertions(+)

diff --git a/lib/tesla/adapter/hackney.ex b/lib/tesla/adapter/hackney.ex
index 1070fb50..e5965857 100644
--- a/lib/tesla/adapter/hackney.ex
+++ b/lib/tesla/adapter/hackney.ex
@@ -24,6 +24,10 @@ if Code.ensure_loaded?(:hackney) do
       adapter Tesla.Adapter.Hackney
     end
     ```
+
+    ## Adapter specific options
+
+    - `:max_body` - Max response body size in bytes. Actual response may be bigger because hackney stops after the last chunk that surpasses `:max_body`.
     """
     @behaviour Tesla.Adapter
     alias Tesla.Multipart
diff --git a/test/tesla/adapter/hackney_test.exs b/test/tesla/adapter/hackney_test.exs
index 3b6414bc..794a1c9d 100644
--- a/test/tesla/adapter/hackney_test.exs
+++ b/test/tesla/adapter/hackney_test.exs
@@ -36,6 +36,18 @@ defmodule Tesla.Adapter.HackneyTest do
     assert is_reference(response.body) == true
   end
 
+  test "get with `:max_body` option" do
+    request = %Env{
+      method: :post,
+      url: "#{@http}/post",
+      body: String.duplicate("long response", 1000)
+    }
+
+    assert {:ok, %Env{} = response} = call(request, with_body: true, max_body: 100)
+    assert response.status == 200
+    assert byte_size(response.body) < 2000
+  end
+
   test "request timeout error" do
     request = %Env{
       method: :get,