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author | nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2018-09-20 03:18:52 +0000 |
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committer | nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2018-09-20 03:18:52 +0000 |
commit | 744e816f55757df92caa49b4787cf06af6120a20 (patch) | |
tree | 924a4754454851c5bdc7c67af7684f3b4ffbd16d /test/ruby/test_array.rb | |
parent | d325d74174c3ffffa0d75e248897cbb1aae93407 (diff) | |
download | ruby-744e816f55757df92caa49b4787cf06af6120a20.tar.gz |
Add union method to Array
I introduce a `union` method equivalent to the `|` operator, but which
accept more than array as argument. This improved readability, and it
is also coherent with the `+` operator, which has a similar `concat`
method. The method doesn't modify the original object and return a new
object instead. It is plan to introduce a `union!` method as well.
Tests and documentation are included.
It solves partially https://bugs.ruby-lang.org/issues/14097
[Fix GH-1747] [Feature #14097]
From: Ana María Martínez Gómez <ammartinez@suse.de>
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64787 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'test/ruby/test_array.rb')
-rw-r--r-- | test/ruby/test_array.rb | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/test/ruby/test_array.rb b/test/ruby/test_array.rb index 9962745f1c..e1a77b73b1 100644 --- a/test/ruby/test_array.rb +++ b/test/ruby/test_array.rb @@ -1884,6 +1884,44 @@ class TestArray < Test::Unit::TestCase assert_equal((1..128).to_a, b) end + def test_union + assert_equal(@cls[], @cls[].union(@cls[])) + assert_equal(@cls[1], @cls[1].union(@cls[])) + assert_equal(@cls[1], @cls[].union(@cls[1])) + assert_equal(@cls[1], @cls[].union(@cls[], @cls[1])) + assert_equal(@cls[1], @cls[1].union(@cls[1])) + assert_equal(@cls[1], @cls[1].union(@cls[1], @cls[1], @cls[1])) + + assert_equal(@cls[1,2], @cls[1].union(@cls[2])) + assert_equal(@cls[1,2], @cls[1, 1].union(@cls[2, 2])) + assert_equal(@cls[1,2], @cls[1, 2].union(@cls[1, 2])) + assert_equal(@cls[1,2], @cls[1, 1].union(@cls[1, 1], @cls[1, 2], @cls[2, 1], @cls[2, 2, 2])) + + a = %w(a b c) + b = %w(a b c d e) + c = a.union(b) + assert_equal(c, b) + assert_not_same(c, b) + assert_equal(%w(a b c), a) + assert_equal(%w(a b c d e), b) + assert(a.none?(&:frozen?)) + assert(b.none?(&:frozen?)) + assert(c.none?(&:frozen?)) + end + + def test_union_big_array + assert_equal(@cls[1,2], (@cls[1]*64).union(@cls[2]*64)) + assert_equal(@cls[1,2,3], (@cls[1, 2]*64).union(@cls[1, 2]*64, @cls[3]*60)) + + a = (1..64).to_a + b = (1..128).to_a + c = a | b + assert_equal(c, b) + assert_not_same(c, b) + assert_equal((1..64).to_a, a) + assert_equal((1..128).to_a, b) + end + def test_combination a = @cls[] assert_equal(1, a.combination(0).size) |