Array#fill fix bug when argument use range object

mrbgems/mruby-array-ext/mrblib/array.rb

@@ -327,7 +327,9 @@ class Array
         # ary.fill(range) { |index| block }             -> ary
         beg = arg0.begin
         beg += self.size if beg < 0
-        len = arg0.end - beg + 1
+        len = arg0.end
+        len += self.size if len < 0
+        len += 1 unless arg0.exclude_end?
       elsif arg0 != nil
         # ary.fill(start [, length] ) { |index| block } -> ary
         beg = arg0
@@ -345,9 +347,11 @@ class Array
         len = self.size
       elsif arg0 != nil && arg1 != nil && arg1.respond_to?(:begin) && arg1.respond_to?(:end)
         # ary.fill(obj, range )                         -> ary
-        len = self.size
         beg = arg1.begin
-        len = arg1.end - beg + 1
+        beg += self.size if beg < 0
+        len = arg1.end
+        len += self.size if len < 0
+        len += 1 unless arg1.exclude_end?
       elsif arg0 != nil && arg1 != nil
         # ary.fill(obj, start [, length])               -> ary
         beg = arg1
@@ -355,7 +359,7 @@ class Array
         if arg2 == nil
           len = self.size
         else
-          len = arg1 + arg2
+          len = beg + arg2
         end
       end
     end

mrbgems/mruby-array-ext/test/array.rb

@@ -133,6 +133,23 @@ assert("Array#fill") do
   assert_equal [0, 2, 3, 27], a.fill(1, 2) { |i| i+1 }
   assert_equal [1, 2, 3, 27], a.fill(0..1) { |i| i+1 }
   assert_raise(ArgumentError) { a.fill }
+
+  assert_equal([0, 1, 2, 3, -1, 5], [0, 1, 2, 3, 4, 5].fill(-1, -2, 1))
+  assert_equal([0, 1, 2, 3, -1, -1, -1], [0, 1, 2, 3, 4, 5].fill(-1, -2, 3))
+  assert_equal([0, 1, 2, -1, -1, 5], [0, 1, 2, 3, 4, 5].fill(-1, 3..4))
+  assert_equal([0, 1, 2, -1, 4, 5], [0, 1, 2, 3, 4, 5].fill(-1, 3...4))
+  assert_equal([0, 1, -1, -1, -1, 5], [0, 1, 2, 3, 4, 5].fill(-1, 2..-2))
+  assert_equal([0, 1, -1, -1, 4, 5], [0, 1, 2, 3, 4, 5].fill(-1, 2...-2))
+  assert_equal([0, 1, 2, 13, 14, 5], [0, 1, 2, 3, 4, 5].fill(3..4){|i| i+10})
+  assert_equal([0, 1, 2, 13, 4, 5], [0, 1, 2, 3, 4, 5].fill(3...4){|i| i+10})
+  assert_equal([0, 1, 12, 13, 14, 5], [0, 1, 2, 3, 4, 5].fill(2..-2){|i| i+10})
+  assert_equal([0, 1, 12, 13, 4, 5], [0, 1, 2, 3, 4, 5].fill(2...-2){|i| i+10})
+
+  assert_equal [1, 2, 3, 4, 'x', 'x'], [1, 2, 3, 4, 5, 6].fill('x', -2..-1)
+  assert_equal [1, 2, 3, 4, 'x', 6], [1, 2, 3, 4, 5, 6].fill('x', -2...-1)
+  assert_equal [1, 2, 3, 4, 5, 6], [1, 2, 3, 4, 5, 6].fill('x', -2...-2)
+  assert_equal [1, 2, 3, 4, 'x', 6], [1, 2, 3, 4, 5, 6].fill('x', -2..-2)
+  assert_equal [1, 2, 3, 4, 5, 6], [1, 2, 3, 4, 5, 6].fill('x', -2..0)
 end
 
 assert("Array#reverse_each") do