test_range.rb: add tests to improve coverage

This patch will improve the result of line coverage from 91.3% to 95.0%.
[Fix GH-1899]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63750 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 14 insertions, 0 deletions

diff --git a/test/ruby/test_range.rb b/test/ruby/test_range.rb
index 58c853fe60..eada19cfb6 100644
--- a/test/ruby/test_range.rb
+++ b/test/ruby/test_range.rb
@@ -240,6 +240,18 @@ class TestRange < Test::Unit::TestCase
     assert_equal(["a"], a)
 
     a = []
+    (:a .. :z).step(2) {|x| a << x }
+    assert_equal(%i(a c e g i k m o q s u w y), a)
+
+    a = []
+    (:a .. ).step(2) {|x| a << x; break if a.size == 13 }
+    assert_equal(%i(a c e g i k m o q s u w y), a)
+
+    a = []
+    (:a .. :z).step(2**32) {|x| a << x }
+    assert_equal([:a], a)
+
+    a = []
     (2**32-1 .. 2**32+1).step(2) {|x| a << x }
     assert_equal([4294967295, 4294967297], a)
     zero = (2**32).coerce(0).first
@@ -493,6 +505,8 @@ class TestRange < Test::Unit::TestCase
     assert_include("a"..."z", "y")
     assert_not_include("a"..."z", "z")
     assert_not_include("a".."z", "cc")
+    assert_include("a".., "c")
+    assert_not_include("a".., "5")
     assert_include(0...10, 5)
     assert_include(5..., 10)
     assert_not_include(5..., 0)