1 files changed, 131 insertions, 0 deletions
diff --git a/spec/ruby/core/string/tr_s_spec.rb b/spec/ruby/core/string/tr_s_spec.rb
new file mode 100644
index 0000000000..22a193ec4b
--- /dev/null
+++ b/spec/ruby/core/string/tr_s_spec.rb
@@ -0,0 +1,131 @@
+# -*- encoding: utf-8 -*-
+# frozen_string_literal: false
+require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
+
+describe "String#tr_s" do
+  it "returns a string processed according to tr with newly duplicate characters removed" do
+    "hello".tr_s('l', 'r').should == "hero"
+    "hello".tr_s('el', '*').should == "h*o"
+    "hello".tr_s('el', 'hx').should == "hhxo"
+    "hello".tr_s('o', '.').should == "hell."
+  end
+
+  it "accepts c1-c2 notation to denote ranges of characters" do
+    "hello".tr_s('a-y', 'b-z').should == "ifmp"
+    "123456789".tr_s("2-5", "abcdefg").should == "1abcd6789"
+    "hello ^--^".tr_s("e-", "__").should == "h_llo ^_^"
+    "hello ^--^".tr_s("---", "_").should == "hello ^_^"
+  end
+
+  it "accepts c1-c1 notation to denote range of one character" do
+    "hello".tr_s('e-e', 'x').should == "hxllo"
+    "123456789".tr_s("2-23","xy").should == "1xy456789"
+    "hello ^-^".tr_s("e-", "a-a_").should == "hallo ^_^"
+    "hello ^-^".tr_s("---o", "_a").should == "hella ^_^"
+  end
+
+  it "pads to_str with its last char if it is shorter than from_string" do
+    "this".tr_s("this", "x").should == "x"
+  end
+
+  it "translates chars not in from_string when it starts with a ^" do
+    "hello".tr_s('^aeiou', '*').should == "*e*o"
+    "123456789".tr_s("^345", "abc").should == "c345c"
+    "abcdefghijk".tr_s("^d-g", "9131").should == "1defg1"
+
+    "hello ^_^".tr_s("a-e^e", ".").should == "h.llo ._."
+    "hello ^_^".tr_s("^^", ".").should == ".^.^"
+    "hello ^_^".tr_s("^", "x").should == "hello x_x"
+    "hello ^-^".tr_s("^-^", "x").should == "x^-^"
+    "hello ^-^".tr_s("^^-^", "x").should == "x^x^"
+    "hello ^-^".tr_s("^---", "x").should == "x-x"
+    "hello ^-^".tr_s("^---l-o", "x").should == "xllox-x"
+  end
+
+  it "tries to convert from_str and to_str to strings using to_str" do
+    from_str = mock('ab')
+    from_str.should_receive(:to_str).and_return("ab")
+
+    to_str = mock('AB')
+    to_str.should_receive(:to_str).and_return("AB")
+
+    "bla".tr_s(from_str, to_str).should == "BlA"
+  end
+
+  it "returns String instances when called on a subclass" do
+    StringSpecs::MyString.new("hello").tr_s("e", "a").should.instance_of?(String)
+  end
+
+  # http://redmine.ruby-lang.org/issues/show/1839
+  it "can replace a 7-bit ASCII character with a multibyte one" do
+    a = "uber"
+    a.encoding.should == Encoding::UTF_8
+    b = a.tr_s("u","ü")
+    b.should == "über"
+    b.encoding.should == Encoding::UTF_8
+  end
+
+  it "can replace multiple 7-bit ASCII characters with a multibyte one" do
+    a = "uuuber"
+    a.encoding.should == Encoding::UTF_8
+    b = a.tr_s("u","ü")
+    b.should == "über"
+    b.encoding.should == Encoding::UTF_8
+  end
+
+  it "can replace a multibyte character with a single byte one" do
+    a = "über"
+    a.encoding.should == Encoding::UTF_8
+    b = a.tr_s("ü","u")
+    b.should == "uber"
+    b.encoding.should == Encoding::UTF_8
+  end
+
+  it "can replace multiple multibyte characters with a single byte one" do
+    a = "üüüber"
+    a.encoding.should == Encoding::UTF_8
+    b = a.tr_s("ü","u")
+    b.should == "uber"
+    b.encoding.should == Encoding::UTF_8
+  end
+
+  it "does not replace a multibyte character where part of the bytes match the tr string" do
+    str = "椎名深夏"
+    a = "\u0080\u0082\u0083\u0084\u0085\u0086\u0087\u0088\u0089\u008A\u008B\u008C\u008E\u0091\u0092\u0093\u0094\u0095\u0096\u0097\u0098\u0099\u009A\u009B\u009C\u009E\u009F"
+    b = "€‚ƒ„…†‡ˆ‰Š‹ŒŽ‘’“”•–—˜™š›œžŸ"
+    str.tr_s(a, b).should == "椎名深夏"
+  end
+
+
+end
+
+describe "String#tr_s!" do
+  it "modifies self in place" do
+    s = "hello"
+    s.tr_s!("l", "r").should == "hero"
+    s.should == "hero"
+  end
+
+  it "returns nil if no modification was made" do
+    s = "hello"
+    s.tr_s!("za", "yb").should == nil
+    s.tr_s!("", "").should == nil
+    s.should == "hello"
+  end
+
+  it "does not modify self if from_str is empty" do
+    s = "hello"
+    s.tr_s!("", "").should == nil
+    s.should == "hello"
+    s.tr_s!("", "yb").should == nil
+    s.should == "hello"
+  end
+
+  it "raises a FrozenError if self is frozen" do
+    s = "hello".freeze
+    -> { s.tr_s!("el", "ar") }.should.raise(FrozenError)
+    -> { s.tr_s!("l", "r")   }.should.raise(FrozenError)
+    -> { s.tr_s!("", "")     }.should.raise(FrozenError)
+  end
+end