ZJIT: Add tests for sending to methods with keyword args

Author: rwstauner

test/ruby/test_zjit.rb

@@ -498,11 +498,47 @@ def entry(arr) = test(*arr)
   def test_send_kwarg
     assert_runs '[1, 2]', %q{
       def test(a:, b:) = [a, b]
-      def entry = test(a: 1, b: 2)
+      def entry = test(b: 2, a: 1) # change order
       entry
     }
   end
 
+  def test_send_kwarg_optional
+    assert_compiles '[1, 2]', %q{
+      def test(a: 1, b: 2) = [a, b]
+      def entry = test
+      entry
+      entry
+    }, call_threshold: 2
+  end
+
+  def test_send_kwarg_required_and_optional
+    assert_compiles '[3, 2]', %q{
+      def test(a:, b: 2) = [a, b]
+      def entry = test(a: 3)
+      entry
+      entry
+    }, call_threshold: 2
+  end
+
+  def test_send_kwarg_to_hash
+    assert_compiles '{a: 3}', %q{
+      def test(hash) = hash
+      def entry = test(a: 3)
+      entry
+      entry
+    }, call_threshold: 2
+  end
+
+  def test_send_kwrest
+    assert_compiles '{a: 3}', %q{
+      def test(**kwargs) = kwargs
+      def entry = test(a: 3)
+      entry
+      entry
+    }, call_threshold: 2
+  end
+
   def test_send_ccall_variadic_with_different_receiver_classes
     assert_compiles '[true, true]', %q{
       def test(obj) = obj.start_with?("a")