Introduce beginless range [Feature#14799]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@67422 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 14 insertions, 1 deletions

diff --git a/test/ruby/test_array.rb b/test/ruby/test_array.rb
index b61bac03c2..8bb9288822 100644
--- a/test/ruby/test_array.rb
+++ b/test/ruby/test_array.rb
@@ -42,6 +42,8 @@ class TestArray < Test::Unit::TestCase
     assert_equal([1, 2, 3], x[1..3])
     assert_equal([1, 2, 3], x[1,3])
     assert_equal([3, 4, 5], x[3..])
+    assert_equal([0, 1, 2], x[..2])
+    assert_equal([0, 1], x[...2])
 
     x[0, 2] = 10
     assert_equal([10, 2, 3, 4, 5], x)
@@ -375,8 +377,11 @@ class TestArray < Test::Unit::TestCase
 
     assert_equal(@cls[10, 11, 12], a[9..11])
     assert_equal(@cls[98, 99, 100], a[97..])
+    assert_equal(@cls[1, 2, 3], a[..2])
+    assert_equal(@cls[1, 2], a[...2])
     assert_equal(@cls[10, 11, 12], a[-91..-89])
-    assert_equal(@cls[98, 99, 100], a[-3..])
+    assert_equal(@cls[1, 2, 3], a[..-98])
+    assert_equal(@cls[1, 2], a[...-98])
 
     assert_nil(a[10, -3])
     assert_equal [], a[10..7]
@@ -462,6 +467,14 @@ class TestArray < Test::Unit::TestCase
     assert_equal(nil, a[10..] = nil)
     assert_equal(@cls[*(0..9).to_a] + @cls[nil], a)
 
+    a = @cls[*(0..99).to_a]
+    assert_equal(nil, a[..10] = nil)
+    assert_equal(@cls[nil] + @cls[*(11..99).to_a], a)
+
+    a = @cls[*(0..99).to_a]
+    assert_equal(nil, a[...10] = nil)
+    assert_equal(@cls[nil] + @cls[*(10..99).to_a], a)
+
     a = @cls[1, 2, 3]
     a[1, 0] = a
     assert_equal([1, 1, 2, 3, 2, 3], a)