From 9ce419a45c521d8c41773ad29cb9ccec3be05028 Mon Sep 17 00:00:00 2001
From: akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sat, 20 Mar 2010 04:27:32 +0000
Subject: * array.c (rb_ary_uniq_bang): the array is already unique if the  
 length is zero or one.   (rb_ary_uniq): ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@26987 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/ruby/test_array.rb | 43 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

(limited to 'test/ruby/test_array.rb')

diff --git a/test/ruby/test_array.rb b/test/ruby/test_array.rb
index 98acfe9d29..69d3f1d75c 100644
--- a/test/ruby/test_array.rb
+++ b/test/ruby/test_array.rb
@@ -1308,6 +1308,30 @@ class TestArray < Test::Unit::TestCase
   end
 
   def test_uniq
+    a = []
+    b = a.uniq
+    assert_equal([], a)
+    assert_equal([], b)
+    assert_not_same(a, b)
+
+    a = [1]
+    b = a.uniq
+    assert_equal([1], a)
+    assert_equal([1], b)
+    assert_not_same(a, b)
+
+    a = [1,1]
+    b = a.uniq
+    assert_equal([1,1], a)
+    assert_equal([1], b)
+    assert_not_same(a, b)
+
+    a = [1,2]
+    b = a.uniq
+    assert_equal([1,2], a)
+    assert_equal([1,2], b)
+    assert_not_same(a, b)
+
     a = @cls[ 1, 2, 3, 2, 1, 2, 3, 4, nil ]
     b = a.dup
     assert_equal(@cls[1, 2, 3, 4, nil], a.uniq)
@@ -1322,6 +1346,25 @@ class TestArray < Test::Unit::TestCase
   end
 
   def test_uniq!
+    a = []
+    b = a.uniq!
+    assert_equal(nil, b)
+
+    a = [1]
+    b = a.uniq!
+    assert_equal(nil, b)
+
+    a = [1,1]
+    b = a.uniq!
+    assert_equal([1], a)
+    assert_equal([1], b)
+    assert_same(a, b)
+
+    a = [1,2]
+    b = a.uniq!
+    assert_equal([1,2], a)
+    assert_equal(nil, b)
+
     a = @cls[ 1, 2, 3, 2, 1, 2, 3, 4, nil ]
     assert_equal(@cls[1, 2, 3, 4, nil], a.uniq!)
     assert_equal(@cls[1, 2, 3, 4, nil], a)
-- 
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