diff options
| author | nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2018-10-05 06:23:34 +0000 |
|---|---|---|
| committer | nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2018-10-05 06:23:34 +0000 |
| commit | d65d5533ab117b46211917450293f9c602519375 (patch) | |
| tree | d604080f517ef921d2f74a64991524692092b662 /test | |
| parent | 68bf34fc272bea7df6a1aeb60096d362df9e5a22 (diff) | |
Add difference method to Array
I introduce a `difference` 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. I plan to introduce a `difference!` method as well.
Tests and documentation are included.
It solves partially https://bugs.ruby-lang.org/issues/14097
From: Ana María Martínez Gómez <ammartinez@suse.de>
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64921 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'test')
| -rw-r--r-- | test/ruby/test_array.rb | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/test/ruby/test_array.rb b/test/ruby/test_array.rb index 1440d00577..1b102c4658 100644 --- a/test/ruby/test_array.rb +++ b/test/ruby/test_array.rb @@ -276,6 +276,27 @@ class TestArray < Test::Unit::TestCase assert_equal(@cls[1] * 1000, a - @cls[2]) end + def test_difference + assert_equal(@cls[], @cls[1].difference(@cls[1])) + assert_equal(@cls[1], @cls[1, 2, 3, 4, 5].difference(@cls[2, 3, 4, 5])) + assert_equal(@cls[1, 1], @cls[1, 2, 1].difference(@cls[2])) + assert_equal(@cls[1, 1, 1, 1], @cls[1, 2, 1, 3, 1, 4, 1, 5].difference(@cls[2, 3, 4, 5])) + assert_equal(@cls[], @cls[1, 2, 3, 4].difference(@cls[1], @cls[2], @cls[3], @cls[4])) + a = [1] + assert_equal(@cls[1], a.difference(@cls[2], @cls[2])) + assert_equal(@cls[], a.difference(@cls[1])) + assert_equal(@cls[1], a) + end + + def test_difference_big_array + assert_equal(@cls[1]*64, (@cls[1, 2, 3, 4, 5] * 64).difference(@cls[2, 3, 4] * 64, @cls[3, 5] * 64)) + assert_equal(@cls[1, 1, 1, 1]*64, (@cls[1, 2, 1, 3, 1, 4, 1, 5] * 64).difference(@cls[2, 3, 4, 5] * 64)) + a = @cls[1] * 1000 + assert_equal(@cls[1] * 1000, a.difference(@cls[2], @cls[2])) + assert_equal(@cls[], a.difference(@cls[1])) + assert_equal(@cls[1] * 1000, a) + end + def test_LSHIFT # '<<' a = @cls[] a << 1 |