* test/ruby/test_call.rb: added test for safe navigation operator.

  [fix GH-1066]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52383 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 13 insertions, 0 deletions

diff --git a/test/ruby/test_call.rb b/test/ruby/test_call.rb
index d2406743af..12793a7572 100644
--- a/test/ruby/test_call.rb
+++ b/test/ruby/test_call.rb
@@ -52,4 +52,17 @@ class TestCall < Test::Unit::TestCase
     assert_nothing_raised(NoMethodError) {o.?x = 6}
     assert_nothing_raised(NoMethodError) {o.?x *= 7}
   end
+
+  def test_safe_call_evaluate_arguments_only_method_call_is_made
+    count = 0
+    proc = proc { count += 1; 1 }
+    s = Struct.new(:x, :y)
+    o = s.new(["a", "b", "c"])
+
+    o.y.?at(proc.call)
+    assert_equal(0, count)
+
+    o.x.?at(proc.call)
+    assert_equal(1, count)
+  end
 end