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diff --git a/spec/ruby/core/string/slice_spec.rb b/spec/ruby/core/string/slice_spec.rb
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+++ b/spec/ruby/core/string/slice_spec.rb
@@ -0,0 +1,476 @@
+# -*- encoding: utf-8 -*-
+
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes.rb', __FILE__)
+require File.expand_path('../shared/slice.rb', __FILE__)
+
+describe "String#slice" do
+  it_behaves_like :string_slice, :slice
+end
+
+describe "String#slice with index, length" do
+  it_behaves_like :string_slice_index_length, :slice
+end
+
+describe "String#slice with Range" do
+  it_behaves_like :string_slice_range, :slice
+end
+
+describe "String#slice with Regexp" do
+  it_behaves_like :string_slice_regexp, :slice
+end
+
+describe "String#slice with Regexp, index" do
+  it_behaves_like :string_slice_regexp_index, :slice
+end
+
+describe "String#slice with Regexp, group" do
+  it_behaves_like :string_slice_regexp_group, :slice
+end
+
+describe "String#slice with String" do
+  it_behaves_like :string_slice_string, :slice
+end
+
+describe "String#slice with Symbol" do
+  it_behaves_like :string_slice_symbol, :slice
+end
+
+describe "String#slice! with index" do
+  it "deletes and return the char at the given position" do
+    a = "hello"
+    a.slice!(1).should == ?e
+    a.should == "hllo"
+    a.slice!(-1).should == ?o
+    a.should == "hll"
+  end
+
+  it "returns nil if idx is outside of self" do
+    a = "hello"
+    a.slice!(20).should == nil
+    a.should == "hello"
+    a.slice!(-20).should == nil
+    a.should == "hello"
+  end
+
+  it "raises a RuntimeError if self is frozen" do
+    lambda { "hello".freeze.slice!(1)  }.should raise_error(RuntimeError)
+    lambda { "hello".freeze.slice!(10) }.should raise_error(RuntimeError)
+    lambda { "".freeze.slice!(0)       }.should raise_error(RuntimeError)
+  end
+
+  it "calls to_int on index" do
+    "hello".slice!(0.5).should == ?h
+
+    obj = mock('1')
+    obj.should_receive(:to_int).at_least(1).and_return(1)
+    "hello".slice!(obj).should == ?e
+
+    obj = mock('1')
+    obj.should_receive(:respond_to?).at_least(1).with(:to_int, true).and_return(true)
+    obj.should_receive(:method_missing).at_least(1).with(:to_int).and_return(1)
+    "hello".slice!(obj).should == ?e
+  end
+
+  with_feature :encoding do
+
+    it "returns the character given by the character index" do
+      "hellö there".send(@method, 1).should == "e"
+      "hellö there".send(@method, 4).should == "ö"
+      "hellö there".send(@method, 6).should == "t"
+    end
+
+  end
+end
+
+describe "String#slice! with index, length" do
+  it "deletes and returns the substring at idx and the given length" do
+    a = "hello"
+    a.slice!(1, 2).should == "el"
+    a.should == "hlo"
+
+    a.slice!(1, 0).should == ""
+    a.should == "hlo"
+
+    a.slice!(-2, 4).should == "lo"
+    a.should == "h"
+  end
+
+  it "always taints resulting strings when self is tainted" do
+    str = "hello world"
+    str.taint
+
+    str.slice!(0, 0).tainted?.should == true
+    str.slice!(2, 1).tainted?.should == true
+  end
+
+  it "returns nil if the given position is out of self" do
+    a = "hello"
+    a.slice(10, 3).should == nil
+    a.should == "hello"
+
+    a.slice(-10, 20).should == nil
+    a.should == "hello"
+  end
+
+  it "returns nil if the length is negative" do
+    a = "hello"
+    a.slice(4, -3).should == nil
+    a.should == "hello"
+  end
+
+  it "raises a RuntimeError if self is frozen" do
+    lambda { "hello".freeze.slice!(1, 2)  }.should raise_error(RuntimeError)
+    lambda { "hello".freeze.slice!(10, 3) }.should raise_error(RuntimeError)
+    lambda { "hello".freeze.slice!(-10, 3)}.should raise_error(RuntimeError)
+    lambda { "hello".freeze.slice!(4, -3) }.should raise_error(RuntimeError)
+    lambda { "hello".freeze.slice!(10, 3) }.should raise_error(RuntimeError)
+    lambda { "hello".freeze.slice!(-10, 3)}.should raise_error(RuntimeError)
+    lambda { "hello".freeze.slice!(4, -3) }.should raise_error(RuntimeError)
+  end
+
+  it "calls to_int on idx and length" do
+    "hello".slice!(0.5, 2.5).should == "he"
+
+    obj = mock('2')
+    def obj.to_int() 2 end
+    "hello".slice!(obj, obj).should == "ll"
+
+    obj = mock('2')
+    def obj.respond_to?(name, *) name == :to_int; end
+    def obj.method_missing(name, *) name == :to_int ? 2 : super; end
+    "hello".slice!(obj, obj).should == "ll"
+  end
+
+  it "returns subclass instances" do
+    s = StringSpecs::MyString.new("hello")
+    s.slice!(0, 0).should be_an_instance_of(StringSpecs::MyString)
+    s.slice!(0, 4).should be_an_instance_of(StringSpecs::MyString)
+  end
+
+  with_feature :encoding do
+
+    it "returns the substring given by the character offsets" do
+      "hellö there".send(@method, 1,0).should == ""
+      "hellö there".send(@method, 1,3).should == "ell"
+      "hellö there".send(@method, 1,6).should == "ellö t"
+      "hellö there".send(@method, 1,9).should == "ellö ther"
+    end
+
+    it "treats invalid bytes as single bytes" do
+      xE6xCB = [0xE6,0xCB].pack('CC').force_encoding('utf-8')
+      "a#{xE6xCB}b".send(@method, 1, 2).should == xE6xCB
+    end
+  end
+end
+
+describe "String#slice! Range" do
+  it "deletes and return the substring given by the offsets of the range" do
+    a = "hello"
+    a.slice!(1..3).should == "ell"
+    a.should == "ho"
+    a.slice!(0..0).should == "h"
+    a.should == "o"
+    a.slice!(0...0).should == ""
+    a.should == "o"
+
+    # Edge Case?
+    "hello".slice!(-3..-9).should == ""
+  end
+
+  it "returns nil if the given range is out of self" do
+    a = "hello"
+    a.slice!(-6..-9).should == nil
+    a.should == "hello"
+
+    b = "hello"
+    b.slice!(10..20).should == nil
+    b.should == "hello"
+  end
+
+  it "always taints resulting strings when self is tainted" do
+    str = "hello world"
+    str.taint
+
+    str.slice!(0..0).tainted?.should == true
+    str.slice!(2..3).tainted?.should == true
+  end
+
+  it "returns subclass instances" do
+    s = StringSpecs::MyString.new("hello")
+    s.slice!(0...0).should be_an_instance_of(StringSpecs::MyString)
+    s.slice!(0..4).should be_an_instance_of(StringSpecs::MyString)
+  end
+
+  it "calls to_int on range arguments" do
+    from = mock('from')
+    to = mock('to')
+
+    # So we can construct a range out of them...
+    def from.<=>(o) 0 end
+    def to.<=>(o) 0 end
+
+    def from.to_int() 1 end
+    def to.to_int() -2 end
+
+    "hello there".slice!(from..to).should == "ello ther"
+
+    from = mock('from')
+    to = mock('to')
+
+    def from.<=>(o) 0 end
+    def to.<=>(o) 0 end
+
+    def from.respond_to?(name, *) name == :to_int; end
+    def from.method_missing(name) name == :to_int ? 1 : super; end
+    def to.respond_to?(name, *) name == :to_int; end
+    def to.method_missing(name) name == :to_int ? -2 : super; end
+
+    "hello there".slice!(from..to).should == "ello ther"
+  end
+
+  it "works with Range subclasses" do
+    a = "GOOD"
+    range_incl = StringSpecs::MyRange.new(1, 2)
+
+    a.slice!(range_incl).should == "OO"
+  end
+
+  with_feature :encoding do
+
+    it "returns the substring given by the character offsets of the range" do
+      "hellö there".send(@method, 1..1).should == "e"
+      "hellö there".send(@method, 1..3).should == "ell"
+      "hellö there".send(@method, 1...3).should == "el"
+      "hellö there".send(@method, -4..-2).should == "her"
+      "hellö there".send(@method, -4...-2).should == "he"
+      "hellö there".send(@method, 5..-1).should == " there"
+      "hellö there".send(@method, 5...-1).should == " ther"
+    end
+
+  end
+
+  it "raises a RuntimeError on a frozen instance that is modified" do
+    lambda { "hello".freeze.slice!(1..3)  }.should raise_error(RuntimeError)
+  end
+
+  # see redmine #1551
+  it "raises a RuntimeError on a frozen instance that would not be modified" do
+    lambda { "hello".freeze.slice!(10..20)}.should raise_error(RuntimeError)
+  end
+end
+
+describe "String#slice! with Regexp" do
+  it "deletes and returns the first match from self" do
+    s = "this is a string"
+    s.slice!(/s.*t/).should == 's is a st'
+    s.should == 'thiring'
+
+    c = "hello hello"
+    c.slice!(/llo/).should == "llo"
+    c.should == "he hello"
+  end
+
+  it "returns nil if there was no match" do
+    s = "this is a string"
+    s.slice!(/zzz/).should == nil
+    s.should == "this is a string"
+  end
+
+  it "always taints resulting strings when self or regexp is tainted" do
+    strs = ["hello world"]
+    strs += strs.map { |s| s.dup.taint }
+
+    strs.each do |str|
+      str = str.dup
+      str.slice!(//).tainted?.should == str.tainted?
+      str.slice!(/hello/).tainted?.should == str.tainted?
+
+      tainted_re = /./
+      tainted_re.taint
+
+      str.slice!(tainted_re).tainted?.should == true
+    end
+  end
+
+  it "doesn't taint self when regexp is tainted" do
+    s = "hello"
+    s.slice!(/./.taint)
+    s.tainted?.should == false
+  end
+
+  it "returns subclass instances" do
+    s = StringSpecs::MyString.new("hello")
+    s.slice!(//).should be_an_instance_of(StringSpecs::MyString)
+    s.slice!(/../).should be_an_instance_of(StringSpecs::MyString)
+  end
+
+  with_feature :encoding do
+    it "returns the matching portion of self with a multi byte character" do
+      "hëllo there".send(@method, /[ë](.)\1/).should == "ëll"
+      "".send(@method, //).should == ""
+    end
+  end
+
+  it "sets $~ to MatchData when there is a match and nil when there's none" do
+    'hello'.slice!(/./)
+    $~[0].should == 'h'
+
+    'hello'.slice!(/not/)
+    $~.should == nil
+  end
+
+  it "raises a RuntimeError on a frozen instance that is modified" do
+    lambda { "this is a string".freeze.slice!(/s.*t/) }.should raise_error(RuntimeError)
+  end
+
+  it "raises a RuntimeError on a frozen instance that would not be modified" do
+    lambda { "this is a string".freeze.slice!(/zzz/)  }.should raise_error(RuntimeError)
+  end
+end
+
+describe "String#slice! with Regexp, index" do
+  it "deletes and returns the capture for idx from self" do
+    str = "hello there"
+    str.slice!(/[aeiou](.)\1/, 0).should == "ell"
+    str.should == "ho there"
+    str.slice!(/(t)h/, 1).should == "t"
+    str.should == "ho here"
+  end
+
+  it "always taints resulting strings when self or regexp is tainted" do
+    strs = ["hello world"]
+    strs += strs.map { |s| s.dup.taint }
+
+    strs.each do |str|
+      str = str.dup
+      str.slice!(//, 0).tainted?.should == str.tainted?
+      str.slice!(/hello/, 0).tainted?.should == str.tainted?
+
+      tainted_re = /(.)(.)(.)/
+      tainted_re.taint
+
+      str.slice!(tainted_re, 1).tainted?.should == true
+    end
+  end
+
+  it "doesn't taint self when regexp is tainted" do
+    s = "hello"
+    s.slice!(/(.)(.)/.taint, 1)
+    s.tainted?.should == false
+  end
+
+  it "returns nil if there was no match" do
+    s = "this is a string"
+    s.slice!(/x(zzz)/, 1).should == nil
+    s.should == "this is a string"
+  end
+
+  it "returns nil if there is no capture for idx" do
+    "hello there".slice!(/[aeiou](.)\1/, 2).should == nil
+    # You can't refer to 0 using negative indices
+    "hello there".slice!(/[aeiou](.)\1/, -2).should == nil
+  end
+
+  it "accepts a Float for capture index" do
+    "har".slice!(/(.)(.)(.)/, 1.5).should == "h"
+  end
+
+  it "calls #to_int to convert an Object to capture index" do
+    obj = mock('2')
+    obj.should_receive(:to_int).at_least(1).times.and_return(2)
+
+    "har".slice!(/(.)(.)(.)/, obj).should == "a"
+  end
+
+  it "returns subclass instances" do
+    s = StringSpecs::MyString.new("hello")
+    s.slice!(/(.)(.)/, 0).should be_an_instance_of(StringSpecs::MyString)
+    s.slice!(/(.)(.)/, 1).should be_an_instance_of(StringSpecs::MyString)
+  end
+
+  with_feature :encoding do
+    it "returns the encoding aware capture for the given index" do
+      "hår".send(@method, /(.)(.)(.)/, 0).should == "hår"
+      "hår".send(@method, /(.)(.)(.)/, 1).should == "h"
+      "hår".send(@method, /(.)(.)(.)/, 2).should == "å"
+      "hår".send(@method, /(.)(.)(.)/, 3).should == "r"
+      "hår".send(@method, /(.)(.)(.)/, -1).should == "r"
+      "hår".send(@method, /(.)(.)(.)/, -2).should == "å"
+      "hår".send(@method, /(.)(.)(.)/, -3).should == "h"
+    end
+  end
+
+  it "sets $~ to MatchData when there is a match and nil when there's none" do
+    'hello'[/.(.)/, 0]
+    $~[0].should == 'he'
+
+    'hello'[/.(.)/, 1]
+    $~[1].should == 'e'
+
+    'hello'[/not/, 0]
+    $~.should == nil
+  end
+
+  it "raises a RuntimeError if self is frozen" do
+    lambda { "this is a string".freeze.slice!(/s.*t/)  }.should raise_error(RuntimeError)
+    lambda { "this is a string".freeze.slice!(/zzz/, 0)}.should raise_error(RuntimeError)
+    lambda { "this is a string".freeze.slice!(/(.)/, 2)}.should raise_error(RuntimeError)
+  end
+end
+
+describe "String#slice! with String" do
+  it "removes and returns the first occurrence of other_str from self" do
+    c = "hello hello"
+    c.slice!('llo').should == "llo"
+    c.should == "he hello"
+  end
+
+  it "taints resulting strings when other is tainted" do
+    strs = ["", "hello world", "hello"]
+    strs += strs.map { |s| s.dup.taint }
+
+    strs.each do |str|
+      str = str.dup
+      strs.each do |other|
+        other = other.dup
+        r = str.slice!(other)
+
+        r.tainted?.should == !r.nil? & other.tainted?
+      end
+    end
+  end
+
+  it "doesn't set $~" do
+    $~ = nil
+
+    'hello'.slice!('ll')
+    $~.should == nil
+  end
+
+  it "returns nil if self does not contain other" do
+    a = "hello"
+    a.slice!('zzz').should == nil
+    a.should == "hello"
+  end
+
+  it "doesn't call to_str on its argument" do
+    o = mock('x')
+    o.should_not_receive(:to_str)
+
+    lambda { "hello".slice!(o) }.should raise_error(TypeError)
+  end
+
+  it "returns a subclass instance when given a subclass instance" do
+    s = StringSpecs::MyString.new("el")
+    r = "hello".slice!(s)
+    r.should == "el"
+    r.should be_an_instance_of(StringSpecs::MyString)
+  end
+
+  it "raises a RuntimeError if self is frozen" do
+    lambda { "hello hello".freeze.slice!('llo')     }.should raise_error(RuntimeError)
+    lambda { "this is a string".freeze.slice!('zzz')}.should raise_error(RuntimeError)
+    lambda { "this is a string".freeze.slice!('zzz')}.should raise_error(RuntimeError)
+  end
+end