test/ruby/test_range.rb: add assertions

Add assertions of Range#first and Range#last to examine the type
conversion of the arguments and the negative value check.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66726 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 13 insertions, 0 deletions

diff --git a/test/ruby/test_range.rb b/test/ruby/test_range.rb
index f58d1f817c..8c3eb08aa7 100644
--- a/test/ruby/test_range.rb
+++ b/test/ruby/test_range.rb
@@ -435,6 +435,19 @@ class TestRange < Test::Unit::TestCase
     assert_equal("a", ("a"..nil).first)
     assert_raise(RangeError) { (0..nil).last }
     assert_raise(RangeError) { (0..nil).last(3) }
+
+    assert_equal([0, 1, 2], (0..10).first(3.0))
+    assert_equal([8, 9, 10], (0..10).last(3.0))
+    assert_raise(TypeError) { (0..10).first("3") }
+    assert_raise(TypeError) { (0..10).last("3") }
+    class << (o = Object.new)
+      def to_int; 3; end
+    end
+    assert_equal([0, 1, 2], (0..10).first(o))
+    assert_equal([8, 9, 10], (0..10).last(o))
+
+    assert_raise(ArgumentError) { (0..10).first(-1) }
+    assert_raise(ArgumentError) { (0..10).last(-1) }
   end
 
   def test_to_s