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# -*- 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
lambda { "hello".rindex(:sym) }.should raise_error(TypeError)
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
ruby_bug "#", "1.8.6" do # Fixed at MRI 1.8.7
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
end
# Ruby 1.9 doesn't support the String#rindex(Fixnum) invocation. However,
# confusingly, many of the tests in this block pass because it also changes
# the semantics of ?l, where _l_ is a character, to return the character
# corresponding to _l_; not the Fixnum. Regardless, it doesn't make sense to
# have a describe block for "String#rindex with Fixnum" on 1.9 when 1.9
# doesn't support that invocation. The other tests in this file exercise
# String#rindex(?l) on 1.9 inadvertently because they test for
# String#rindex(str).
ruby_version_is ""..."1.9" do
describe "String#rindex with Fixnum" do
it "returns the index of the last occurrence of the given character" do
"hello".rindex(?e).should == 1
"hello".rindex(?l).should == 3
end
it "doesn't use fixnum % 256" do
"hello".rindex(?e + 256 * 3).should == nil
"hello".rindex(-(256 - ?e)).should == nil
end
it "starts the search at the given offset" do
"blablabla".rindex(?b, 0).should == 0
"blablabla".rindex(?b, 1).should == 0
"blablabla".rindex(?b, 2).should == 0
"blablabla".rindex(?b, 3).should == 3
"blablabla".rindex(?b, 4).should == 3
"blablabla".rindex(?b, 5).should == 3
"blablabla".rindex(?b, 6).should == 6
"blablabla".rindex(?b, 7).should == 6
"blablabla".rindex(?b, 8).should == 6
"blablabla".rindex(?b, 9).should == 6
"blablabla".rindex(?b, 10).should == 6
"blablabla".rindex(?a, 2).should == 2
"blablabla".rindex(?a, 3).should == 2
"blablabla".rindex(?a, 4).should == 2
"blablabla".rindex(?a, 5).should == 5
"blablabla".rindex(?a, 6).should == 5
"blablabla".rindex(?a, 7).should == 5
"blablabla".rindex(?a, 8).should == 8
"blablabla".rindex(?a, 9).should == 8
"blablabla".rindex(?a, 10).should == 8
end
it "starts the search at offset + self.length if offset is negative" do
str = "blablabla"
[?a, ?b].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 character isn't found" do
"hello".rindex(0).should == nil
"hello".rindex(?H).should == nil
"hello".rindex(?z).should == nil
"hello".rindex(?o, 2).should == nil
"blablabla".rindex(?a, 0).should == nil
"blablabla".rindex(?a, 1).should == nil
"blablabla".rindex(?a, -8).should == nil
"blablabla".rindex(?a, -9).should == nil
"blablabla".rindex(?b, -10).should == nil
"blablabla".rindex(?b, -20).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(?s, obj).should == 0
obj = mock('5')
def obj.respond_to?(arg, *) true end
def obj.method_missing(*args); 5; end
"str".rindex(?s, obj).should == 0
end
it "raises a TypeError when given offset is nil" do
lambda { "str".rindex(?s, nil) }.should raise_error(TypeError)
lambda { "str".rindex(?t, nil) }.should raise_error(TypeError)
end
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...!"].each do |str|
str.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
end
# On 1.9 ?chr, where _chr_ is a character returns the character as a string.
# The test below repeats the one above but uses the ?l notation for single
# characters instead.
ruby_version_is "1.9" do
it "behaves the same as String#rindex(?char) for one-character strings" do
["blablabla", "hello cruel world...!"].each do |str|
str.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
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
"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
"blablabla".rindex(/^/).should == 0
"\nblablabla".rindex(/^/).should == 1
"b\nlablabla".rindex(/^/).should == 2
"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
"blablabla\n".rindex(/\Z/, 9).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(/BLA/).should == nil
"blablabla".rindex(/.{10}/).should == nil
"blablablax".rindex(/.x/, 7).should == nil
"blablablax".rindex(/..x/, 6).should == nil
"blablabla".rindex(/\Z/, 5).should == nil
"blablabla".rindex(/\z/, 5).should == nil
"blablabla\n".rindex(/\z/, 9).should == nil
end
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
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
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