diff options
Diffstat (limited to 'spec/ruby/core/string/rindex_spec.rb')
| -rw-r--r-- | spec/ruby/core/string/rindex_spec.rb | 368 |
1 files changed, 368 insertions, 0 deletions
diff --git a/spec/ruby/core/string/rindex_spec.rb b/spec/ruby/core/string/rindex_spec.rb new file mode 100644 index 0000000000..7085914189 --- /dev/null +++ b/spec/ruby/core/string/rindex_spec.rb @@ -0,0 +1,368 @@ +# -*- encoding: utf-8 -*- +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../fixtures/classes.rb', __FILE__) +require File.expand_path('../fixtures/utf-8-encoding.rb', __FILE__) + +describe "String#rindex with object" do + it "raises a TypeError if obj isn't a String, Fixnum or Regexp" do + not_supported_on :opal do + lambda { "hello".rindex(:sym) }.should raise_error(TypeError) + end + lambda { "hello".rindex(mock('x')) }.should raise_error(TypeError) + end + + it "doesn't try to convert obj to an integer via to_int" do + obj = mock('x') + obj.should_not_receive(:to_int) + lambda { "hello".rindex(obj) }.should raise_error(TypeError) + end + + it "tries to convert obj to a string via to_str" do + obj = mock('lo') + def obj.to_str() "lo" end + "hello".rindex(obj).should == "hello".rindex("lo") + + obj = mock('o') + def obj.respond_to?(arg, *) true end + def obj.method_missing(*args) "o" end + "hello".rindex(obj).should == "hello".rindex("o") + end +end + +describe "String#rindex with String" do + it "behaves the same as String#rindex(char) for one-character strings" do + "blablabla hello cruel world...!".split("").uniq.each do |str| + chr = str[0] + str.rindex(str).should == str.rindex(chr) + + 0.upto(str.size + 1) do |start| + str.rindex(str, start).should == str.rindex(chr, start) + end + + (-str.size - 1).upto(-1) do |start| + str.rindex(str, start).should == str.rindex(chr, start) + end + end + end + + it "behaves the same as String#rindex(?char) for one-character strings" do + "blablabla hello cruel world...!".split("").uniq.each do |str| + chr = str[0] =~ / / ? str[0] : eval("?#{str[0]}") + str.rindex(str).should == str.rindex(chr) + + 0.upto(str.size + 1) do |start| + str.rindex(str, start).should == str.rindex(chr, start) + end + + (-str.size - 1).upto(-1) do |start| + str.rindex(str, start).should == str.rindex(chr, start) + end + end + end + + it "returns the index of the last occurrence of the given substring" do + "blablabla".rindex("").should == 9 + "blablabla".rindex("a").should == 8 + "blablabla".rindex("la").should == 7 + "blablabla".rindex("bla").should == 6 + "blablabla".rindex("abla").should == 5 + "blablabla".rindex("labla").should == 4 + "blablabla".rindex("blabla").should == 3 + "blablabla".rindex("ablabla").should == 2 + "blablabla".rindex("lablabla").should == 1 + "blablabla".rindex("blablabla").should == 0 + + "blablabla".rindex("l").should == 7 + "blablabla".rindex("bl").should == 6 + "blablabla".rindex("abl").should == 5 + "blablabla".rindex("labl").should == 4 + "blablabla".rindex("blabl").should == 3 + "blablabla".rindex("ablabl").should == 2 + "blablabla".rindex("lablabl").should == 1 + "blablabla".rindex("blablabl").should == 0 + + "blablabla".rindex("b").should == 6 + "blablabla".rindex("ab").should == 5 + "blablabla".rindex("lab").should == 4 + "blablabla".rindex("blab").should == 3 + "blablabla".rindex("ablab").should == 2 + "blablabla".rindex("lablab").should == 1 + "blablabla".rindex("blablab").should == 0 + end + + it "doesn't set $~" do + $~ = nil + + 'hello.'.rindex('ll') + $~.should == nil + end + + it "ignores string subclasses" do + "blablabla".rindex(StringSpecs::MyString.new("bla")).should == 6 + StringSpecs::MyString.new("blablabla").rindex("bla").should == 6 + StringSpecs::MyString.new("blablabla").rindex(StringSpecs::MyString.new("bla")).should == 6 + end + + it "starts the search at the given offset" do + "blablabla".rindex("bl", 0).should == 0 + "blablabla".rindex("bl", 1).should == 0 + "blablabla".rindex("bl", 2).should == 0 + "blablabla".rindex("bl", 3).should == 3 + + "blablabla".rindex("bla", 0).should == 0 + "blablabla".rindex("bla", 1).should == 0 + "blablabla".rindex("bla", 2).should == 0 + "blablabla".rindex("bla", 3).should == 3 + + "blablabla".rindex("blab", 0).should == 0 + "blablabla".rindex("blab", 1).should == 0 + "blablabla".rindex("blab", 2).should == 0 + "blablabla".rindex("blab", 3).should == 3 + "blablabla".rindex("blab", 6).should == 3 + "blablablax".rindex("blab", 6).should == 3 + + "blablabla".rindex("la", 1).should == 1 + "blablabla".rindex("la", 2).should == 1 + "blablabla".rindex("la", 3).should == 1 + "blablabla".rindex("la", 4).should == 4 + + "blablabla".rindex("lab", 1).should == 1 + "blablabla".rindex("lab", 2).should == 1 + "blablabla".rindex("lab", 3).should == 1 + "blablabla".rindex("lab", 4).should == 4 + + "blablabla".rindex("ab", 2).should == 2 + "blablabla".rindex("ab", 3).should == 2 + "blablabla".rindex("ab", 4).should == 2 + "blablabla".rindex("ab", 5).should == 5 + + "blablabla".rindex("", 0).should == 0 + "blablabla".rindex("", 1).should == 1 + "blablabla".rindex("", 2).should == 2 + "blablabla".rindex("", 7).should == 7 + "blablabla".rindex("", 8).should == 8 + "blablabla".rindex("", 9).should == 9 + "blablabla".rindex("", 10).should == 9 + end + + it "starts the search at offset + self.length if offset is negative" do + str = "blablabla" + + ["bl", "bla", "blab", "la", "lab", "ab", ""].each do |needle| + (-str.length .. -1).each do |offset| + str.rindex(needle, offset).should == + str.rindex(needle, offset + str.length) + end + end + end + + it "returns nil if the substring isn't found" do + "blablabla".rindex("B").should == nil + "blablabla".rindex("z").should == nil + "blablabla".rindex("BLA").should == nil + "blablabla".rindex("blablablabla").should == nil + + "hello".rindex("lo", 0).should == nil + "hello".rindex("lo", 1).should == nil + "hello".rindex("lo", 2).should == nil + + "hello".rindex("llo", 0).should == nil + "hello".rindex("llo", 1).should == nil + + "hello".rindex("el", 0).should == nil + "hello".rindex("ello", 0).should == nil + + "hello".rindex("", -6).should == nil + "hello".rindex("", -7).should == nil + + "hello".rindex("h", -6).should == nil + end + + it "tries to convert start_offset to an integer via to_int" do + obj = mock('5') + def obj.to_int() 5 end + "str".rindex("st", obj).should == 0 + + obj = mock('5') + def obj.respond_to?(arg, *) true end + def obj.method_missing(*args) 5 end + "str".rindex("st", obj).should == 0 + end + + it "raises a TypeError when given offset is nil" do + lambda { "str".rindex("st", nil) }.should raise_error(TypeError) + end +end + +describe "String#rindex with Regexp" do + it "behaves the same as String#rindex(string) for escaped string regexps" do + ["blablabla", "hello cruel world...!"].each do |str| + ["", "b", "bla", "lab", "o c", "d."].each do |needle| + regexp = Regexp.new(Regexp.escape(needle)) + str.rindex(regexp).should == str.rindex(needle) + + 0.upto(str.size + 1) do |start| + str.rindex(regexp, start).should == str.rindex(needle, start) + end + + (-str.size - 1).upto(-1) do |start| + str.rindex(regexp, start).should == str.rindex(needle, start) + end + end + end + end + + it "returns the index of the first match from the end of string of regexp" do + "blablabla".rindex(/bla/).should == 6 + "blablabla".rindex(/BLA/i).should == 6 + + "blablabla".rindex(/.{0}/).should == 9 + "blablabla".rindex(/.{1}/).should == 8 + "blablabla".rindex(/.{2}/).should == 7 + "blablabla".rindex(/.{6}/).should == 3 + "blablabla".rindex(/.{9}/).should == 0 + + "blablabla".rindex(/.*/).should == 9 + "blablabla".rindex(/.+/).should == 8 + + "blablabla".rindex(/bla|a/).should == 8 + + not_supported_on :opal do + "blablabla".rindex(/\A/).should == 0 + "blablabla".rindex(/\Z/).should == 9 + "blablabla".rindex(/\z/).should == 9 + "blablabla\n".rindex(/\Z/).should == 10 + "blablabla\n".rindex(/\z/).should == 10 + end + + "blablabla".rindex(/^/).should == 0 + not_supported_on :opal do + "\nblablabla".rindex(/^/).should == 1 + "b\nlablabla".rindex(/^/).should == 2 + end + "blablabla".rindex(/$/).should == 9 + + "blablabla".rindex(/.l./).should == 6 + end + + it "sets $~ to MatchData of match and nil when there's none" do + 'hello.'.rindex(/.(.)/) + $~[0].should == 'o.' + + 'hello.'.rindex(/not/) + $~.should == nil + end + + it "starts the search at the given offset" do + "blablabla".rindex(/.{0}/, 5).should == 5 + "blablabla".rindex(/.{1}/, 5).should == 5 + "blablabla".rindex(/.{2}/, 5).should == 5 + "blablabla".rindex(/.{3}/, 5).should == 5 + "blablabla".rindex(/.{4}/, 5).should == 5 + + "blablabla".rindex(/.{0}/, 3).should == 3 + "blablabla".rindex(/.{1}/, 3).should == 3 + "blablabla".rindex(/.{2}/, 3).should == 3 + "blablabla".rindex(/.{5}/, 3).should == 3 + "blablabla".rindex(/.{6}/, 3).should == 3 + + "blablabla".rindex(/.l./, 0).should == 0 + "blablabla".rindex(/.l./, 1).should == 0 + "blablabla".rindex(/.l./, 2).should == 0 + "blablabla".rindex(/.l./, 3).should == 3 + + "blablablax".rindex(/.x/, 10).should == 8 + "blablablax".rindex(/.x/, 9).should == 8 + "blablablax".rindex(/.x/, 8).should == 8 + + "blablablax".rindex(/..x/, 10).should == 7 + "blablablax".rindex(/..x/, 9).should == 7 + "blablablax".rindex(/..x/, 8).should == 7 + "blablablax".rindex(/..x/, 7).should == 7 + + not_supported_on :opal do + "blablabla\n".rindex(/\Z/, 9).should == 9 + end + end + + it "starts the search at offset + self.length if offset is negative" do + str = "blablabla" + + ["bl", "bla", "blab", "la", "lab", "ab", ""].each do |needle| + (-str.length .. -1).each do |offset| + str.rindex(needle, offset).should == + str.rindex(needle, offset + str.length) + end + end + end + + it "returns nil if the substring isn't found" do + "blablabla".rindex(/BLA/).should == nil + "blablabla".rindex(/.{10}/).should == nil + "blablablax".rindex(/.x/, 7).should == nil + "blablablax".rindex(/..x/, 6).should == nil + + not_supported_on :opal do + "blablabla".rindex(/\Z/, 5).should == nil + "blablabla".rindex(/\z/, 5).should == nil + "blablabla\n".rindex(/\z/, 9).should == nil + end + end + + not_supported_on :opal do + it "supports \\G which matches at the given start offset" do + "helloYOU.".rindex(/YOU\G/, 8).should == 5 + "helloYOU.".rindex(/YOU\G/).should == nil + + idx = "helloYOUall!".index("YOU") + re = /YOU.+\G.+/ + # The # marks where \G will match. + [ + ["helloYOU#all.", nil], + ["helloYOUa#ll.", idx], + ["helloYOUal#l.", idx], + ["helloYOUall#.", idx], + ["helloYOUall.#", nil] + ].each do |i| + start = i[0].index("#") + str = i[0].delete("#") + + str.rindex(re, start).should == i[1] + end + end + end + + it "tries to convert start_offset to an integer via to_int" do + obj = mock('5') + def obj.to_int() 5 end + "str".rindex(/../, obj).should == 1 + + obj = mock('5') + def obj.respond_to?(arg, *) true end + def obj.method_missing(*args); 5; end + "str".rindex(/../, obj).should == 1 + end + + it "raises a TypeError when given offset is nil" do + lambda { "str".rindex(/../, nil) }.should raise_error(TypeError) + end + + with_feature :encoding do + it "returns the reverse character index of a multibyte character" do + "ありがりがとう".rindex("が").should == 4 + "ありがりがとう".rindex(/が/).should == 4 + end + + it "returns the character index before the finish" do + "ありがりがとう".rindex("が", 3).should == 2 + "ありがりがとう".rindex(/が/, 3).should == 2 + end + + it "raises an Encoding::CompatibilityError if the encodings are incompatible" do + re = Regexp.new "れ".encode(Encoding::EUC_JP) + lambda do + "あれ".rindex re + end.should raise_error(Encoding::CompatibilityError) + end + end +end |