Make the test helpers compatible with nested fields

lib/absinthe_error_payload/test_helper.ex

@@ -127,6 +127,13 @@ defmodule AbsintheErrorPayload.TestHelper do
     assert {field, expected} == {field, response}
   end
 
+  defp assert_values_match({_field, %{} = sub_fields, expected, response}) do
+    sub_fields
+    |> Enum.to_list()
+    |> Enum.map(fn field_tuple -> value_tuple(field_tuple, expected, response) end)
+    |> Enum.each(&assert_values_match/1)
+  end
+
   defp assert_values_match({field, _type, expected, response}) do
     assert {field, expected} == {field, response}
   end

test/test_helper_test.exs

@@ -24,6 +24,17 @@ defmodule AbsintheErrorPayload.TestHelperTest do
     }
   end
 
+  def nested_fields do
+    %{
+      root: :string,
+      single: %{
+        string: :string,
+        integer: :integer,
+        nillable: :nillable
+      }
+    }
+  end
+
   def input do
     %{
       date: @time,
@@ -51,6 +62,17 @@ defmodule AbsintheErrorPayload.TestHelperTest do
     }
   end
 
+  def nested_input do
+    %{
+      root: "root string",
+      single: %{
+        string: "single nested string",
+        integer: 1,
+        nillable: nil
+      }
+    }
+  end
+
   def graphql do
     %{
       "date" => to_string(@time),
@@ -78,6 +100,17 @@ defmodule AbsintheErrorPayload.TestHelperTest do
     }
   end
 
+  def nested_graphql do
+    %{
+      "root" => "root string",
+      "single" => %{
+        "string" => "single nested string",
+        "integer" => 1,
+        "nillable" => nil
+      }
+    }
+  end
+
   describe "assert_equivalent_graphql/3" do
     test "all types compare" do
       assert_equivalent_graphql(input(), graphql(), fields())
@@ -94,6 +127,10 @@ defmodule AbsintheErrorPayload.TestHelperTest do
         fields()
       )
     end
+
+    test "nested fields compare" do
+      assert_equivalent_graphql(nested_input(), nested_graphql(), nested_fields())
+    end
   end
 
   describe "assert_mutation_success/3" do
@@ -106,6 +143,16 @@ defmodule AbsintheErrorPayload.TestHelperTest do
 
       assert_mutation_success(input(), mutation_response, fields())
     end
+
+    test "matches result with nested fields" do
+      mutation_response = %{
+        "successful" => true,
+        "messages" => [],
+        "result" => nested_graphql()
+      }
+
+      assert_mutation_success(nested_input(), mutation_response, nested_fields())
+    end
   end
 
   describe "assert_mutation_failure/3" do