1 files changed, 38 insertions, 0 deletions
diff --git a/test/ruby/test_key_error.rb b/test/ruby/test_key_error.rb
new file mode 100644
index 0000000000..852bd32712
--- /dev/null
+++ b/test/ruby/test_key_error.rb
@@ -0,0 +1,38 @@
+require 'test/unit'
+
+class TestKeyError < Test::Unit::TestCase
+  def test_default
+    error = KeyError.new
+    assert_equal("KeyError", error.message)
+  end
+
+  def test_message
+    error = KeyError.new("Message")
+    assert_equal("Message", error.message)
+  end
+
+  def test_receiver
+    receiver = Object.new
+    error = KeyError.new(receiver: receiver)
+    assert_equal(receiver, error.receiver)
+  end
+
+  def test_key
+    error = KeyError.new(key: :key)
+    assert_equal(:key, error.key)
+  end
+
+  def test_receiver_and_key
+    receiver = Object.new
+    error = KeyError.new(receiver: receiver, key: :key)
+    assert_equal([receiver, :key],
+                 [error.receiver, error.key])
+  end
+
+  def test_all
+    receiver = Object.new
+    error = KeyError.new("Message", receiver: receiver, key: :key)
+    assert_equal(["Message", receiver, :key],
+                 [error.message, error.receiver, error.key])
+  end
+end