* array.c (rb_ary_resize): new utility function. [ruby-dev:42912]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@30465 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 29 insertions, 0 deletions

diff --git a/test/-ext-/array/test_resize.rb b/test/-ext-/array/test_resize.rb
new file mode 100644
index 0000000000..d9084b652d
--- /dev/null
+++ b/test/-ext-/array/test_resize.rb
@@ -0,0 +1,29 @@
+require 'test/unit'
+require '-test-/array/resize'
+
+class TestArray < Test::Unit::TestCase
+  class TestResize < Test::Unit::TestCase
+    def test_expand
+      feature = '[ruby-dev:42912]'
+      ary = [*1..10]
+      ary.resize(10)
+      assert_equal(10, ary.size, feature)
+      assert_equal([*1..10], ary, feature)
+      ary.resize(100)
+      assert_equal(100, ary.size, feature)
+      assert_equal([*1..10]+[nil]*90, ary, feature)
+      ary.resize(20)
+      assert_equal(20, ary.size, feature)
+      assert_equal([*1..10]+[nil]*10, ary, feature)
+      ary.resize(2)
+      assert_equal(2, ary.size, feature)
+      assert_equal([1,2], ary, feature)
+      ary.resize(3)
+      assert_equal(3, ary.size, feature)
+      assert_equal([1,2,nil], ary, feature)
+      ary.resize(10)
+      assert_equal(10, ary.size, feature)
+      assert_equal([1,2]+[nil]*8, ary, feature)
+    end
+  end
+end