diff options
Diffstat (limited to 'spec/ruby/core/string/tr_s_spec.rb')
-rw-r--r-- | spec/ruby/core/string/tr_s_spec.rb | 136 |
1 files changed, 136 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..ea2ffa71b9 --- /dev/null +++ b/spec/ruby/core/string/tr_s_spec.rb @@ -0,0 +1,136 @@ +# -*- encoding: utf-8 -*- +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../fixtures/classes.rb', __FILE__) + +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 "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 subclass instances when called on a subclass" do + StringSpecs::MyString.new("hello").tr_s("e", "a").should be_an_instance_of(StringSpecs::MyString) + end + + it "taints the result when self is tainted" do + ["h", "hello"].each do |str| + tainted_str = str.dup.taint + + tainted_str.tr_s("e", "a").tainted?.should == true + + str.tr_s("e".taint, "a").tainted?.should == false + str.tr_s("e", "a".taint).tainted?.should == false + end + end + + with_feature :encoding do + # 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 + +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 RuntimeError if self is frozen" do + s = "hello".freeze + lambda { s.tr_s!("el", "ar") }.should raise_error(RuntimeError) + lambda { s.tr_s!("l", "r") }.should raise_error(RuntimeError) + lambda { s.tr_s!("", "") }.should raise_error(RuntimeError) + end +end |