add safe-navigation operator tests

4c1ce0f6 · Yukihiro "Matz" Matsumoto · 21a3ae08 · 4c1ce0f6
Commit 4c1ce0f6 authored Mar 23, 2016 by Yukihiro "Matz" Matsumoto
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test/t/nil.rb test/t/nil.rb +5 -0

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--- a/test/t/nil.rb
+++ b/test/t/nil.rb
@@ -32,3 +32,8 @@ end
 assert('NilClass#to_s', '15.2.4.3.5') do
  assert_equal '', nil.to_s
 end
+
+assert('safe navigation', '15.2.4.3.5') do
+  assert_nil nil&.size
+  assert_equal 0, []&.size
+end