1 files changed, 137 insertions, 0 deletions
diff --git a/test/ruby/test_nomethod_error.rb b/test/ruby/test_nomethod_error.rb
new file mode 100644
index 0000000000..6abd20cc81
--- /dev/null
+++ b/test/ruby/test_nomethod_error.rb
@@ -0,0 +1,137 @@
+require 'test/unit'
+
+class TestNoMethodError < Test::Unit::TestCase
+  def test_new_default
+    error = NoMethodError.new
+    assert_equal("NoMethodError", error.message)
+  end
+
+  def test_new_message
+    error = NoMethodError.new("Message")
+    assert_equal("Message", error.message)
+  end
+
+  def test_new_name
+    error = NoMethodError.new("Message")
+    assert_nil(error.name)
+
+    error = NoMethodError.new("Message", :foo)
+    assert_equal(:foo, error.name)
+  end
+
+  def test_new_name_args
+    error = NoMethodError.new("Message", :foo)
+    assert_nil(error.args)
+
+    error = NoMethodError.new("Message", :foo, [1, 2])
+    assert_equal([:foo, [1, 2]], [error.name, error.args])
+  end
+
+  def test_new_name_args_priv
+    error = NoMethodError.new("Message", :foo, [1, 2])
+    assert_not_predicate(error, :private_call?)
+
+    error = NoMethodError.new("Message", :foo, [1, 2], true)
+    assert_equal([:foo, [1, 2], true],
+                 [error.name, error.args, error.private_call?])
+  end
+
+  def test_new_receiver
+    receiver = Object.new
+
+    error = NoMethodError.new
+    assert_raise(ArgumentError) {error.receiver}
+
+    error = NoMethodError.new(receiver: receiver)
+    assert_equal(receiver, error.receiver)
+
+    error = NoMethodError.new("Message")
+    assert_raise(ArgumentError) {error.receiver}
+
+    error = NoMethodError.new("Message", receiver: receiver)
+    assert_equal(["Message", receiver],
+                 [error.message, error.receiver])
+
+    error = NoMethodError.new("Message", :foo)
+    assert_raise(ArgumentError) {error.receiver}
+
+    msg = "Message"
+
+    error = NoMethodError.new("Message", :foo, receiver: receiver)
+    assert_match msg, error.message
+    assert_equal :foo, error.name
+    assert_equal receiver, error.receiver
+
+    error = NoMethodError.new("Message", :foo, [1, 2])
+    assert_raise(ArgumentError) {error.receiver}
+
+    error = NoMethodError.new("Message", :foo, [1, 2], receiver: receiver)
+    assert_match msg, error.message
+    assert_equal :foo, error.name
+    assert_equal [1, 2], error.args
+    assert_equal receiver, error.receiver
+
+    error = NoMethodError.new("Message", :foo, [1, 2], true)
+    assert_raise(ArgumentError) {error.receiver}
+
+    error = NoMethodError.new("Message", :foo, [1, 2], true, receiver: receiver)
+    assert_equal :foo, error.name
+    assert_equal [1, 2], error.args
+    assert_equal receiver, error.receiver
+    assert_predicate error, :private_call?
+  end
+
+  def test_message_encoding
+    bug3237 = '[ruby-core:29948]'
+    str = "\u2600"
+    id = :"\u2604"
+    msg = "undefined method '#{id}' for an instance of String"
+    assert_raise_with_message(NoMethodError, Regexp.compile(Regexp.quote(msg)), bug3237) do
+      str.__send__(id)
+    end
+  end
+
+  def test_to_s
+    pre = Module.new do
+      def name
+        BasicObject.new
+      end
+    end
+    mod = Module.new
+    mod.singleton_class.prepend(pre)
+
+    err = assert_raise(NoMethodError) do
+      mod.this_method_does_not_exist
+    end
+
+    assert_match(/undefined method.+this_method_does_not_exist.+for.+Module/, err.to_s)
+  end
+
+  def test_send_forward_raises
+    t = EnvUtil.labeled_class("Test") do
+      def foo(...)
+        forward(...)
+      end
+    end
+    obj = t.new
+    assert_raise(NoMethodError) do
+      obj.foo
+    end
+  end
+
+  # [Bug #21535]
+  def test_send_forward_raises_when_called_through_vcall
+    t = EnvUtil.labeled_class("Test") do
+      def foo(...)
+        forward(...)
+      end
+      def foo_indirect
+        foo # vcall
+      end
+    end
+    obj = t.new
+    assert_raise(NoMethodError) do
+      obj.foo_indirect
+    end
+  end
+end