Add field name to initialization map exceptions

1 files changed, 17 insertions, 0 deletions

diff --git a/ruby/tests/basic.rb b/ruby/tests/basic.rb
index 815abc46..da85520f 100644
--- a/ruby/tests/basic.rb
+++ b/ruby/tests/basic.rb
@@ -203,6 +203,23 @@ module BasicTest
       assert_match(/hello/, e.message)
     end
 
+    def test_initialization_map_errors
+      e = assert_raise ArgumentError do
+        TestMessage.new(:hello => "world")
+      end
+      assert_match(/hello/, e.message)
+
+      e = assert_raise ArgumentError do
+        MapMessage.new(:map_string_int32 => "hello")
+      end
+      assert_equal e.message, "Expected Hash object as initializer value for map field 'map_string_int32'."
+
+      e = assert_raise ArgumentError do
+        TestMessage.new(:repeated_uint32 => "hello")
+      end
+      assert_equal e.message, "Expected array as initializer value for repeated field 'repeated_uint32'."
+    end
+
     def test_type_errors
       m = TestMessage.new
       assert_raise TypeError do