Try to convert first with to_hash, then to_h

rb_convert_type doesn't return if conversion fails, so use
rb_check_convert_type and the raise vi rb_convert_type. Make sure, that
this behaviour is consisten across all generator implementations.

Fixes https://github.com/flori/json/issues/162

1 files changed, 16 insertions, 0 deletions

diff --git a/tests/test_json_generate.rb b/tests/test_json_generate.rb
index 978c625..ab3c74c 100755
--- a/tests/test_json_generate.rb
+++ b/tests/test_json_generate.rb
@@ -251,6 +251,22 @@ EOT
     assert_equal '5', state2.array_nl
   end
 
+  def test_configure_hash_conversion
+    state = JSON.state.new
+    state.configure(:indent => '1')
+    assert_equal '1', state.indent
+    state = JSON.state.new
+    foo = 'foo'
+    assert_raise(TypeError) do
+      state.configure(foo)
+    end
+    def foo.to_h
+      { :indent => '2' }
+    end
+    state.configure(foo)
+    assert_equal '2', state.indent
+  end
+
   if defined?(JSON::Ext::Generator)
     def test_broken_bignum # [ruby-core:38867]
       pid = fork do