test_call.rb: add tests

* test_call.rb (test_safe_call): Add test cases for safe
  navigation operator assignment.  [Fix GH-1064]
  Validate:
  * can assign an attribute which is `nil`
  * can "or assign" an attribute which is `nil`

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52238 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 5 insertions, 1 deletions

diff --git a/test/ruby/test_call.rb b/test/ruby/test_call.rb
index 33eec70f6a..d2406743af 100644
--- a/test/ruby/test_call.rb
+++ b/test/ruby/test_call.rb
@@ -33,7 +33,7 @@ class TestCall < Test::Unit::TestCase
   end
 
   def test_safe_call
-    s = Struct.new(:x, :y)
+    s = Struct.new(:x, :y, :z)
     o = s.new("x")
     assert_equal("X", o.x.?upcase)
     assert_nil(o.y.?upcase)
@@ -42,6 +42,10 @@ class TestCall < Test::Unit::TestCase
     assert_equal(6, o.x)
     o.?x *= 7
     assert_equal(42, o.x)
+    o.?y = 5
+    assert_equal(5, o.y)
+    o.?z ||= 6
+    assert_equal(6, o.z)
 
     o = nil
     assert_nil(o.?x)