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-rw-r--r--spec/rubyspec/core/string/index_spec.rb315
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diff --git a/spec/rubyspec/core/string/index_spec.rb b/spec/rubyspec/core/string/index_spec.rb
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-# -*- encoding: utf-8 -*-
-require File.expand_path('../../../spec_helper', __FILE__)
-require File.expand_path('../fixtures/classes.rb', __FILE__)
-
-describe "String#index" do
- it "raises a TypeError if passed nil" do
- lambda { "abc".index nil }.should raise_error(TypeError)
- end
-
- it "raises a TypeError if passed a boolean" do
- lambda { "abc".index true }.should raise_error(TypeError)
- end
-
- it "raises a TypeError if passed a Symbol" do
- lambda { "abc".index :a }.should raise_error(TypeError)
- end
-
- it "calls #to_str to convert the first argument" do
- char = mock("string index char")
- char.should_receive(:to_str).and_return("b")
- "abc".index(char).should == 1
- end
-
- it "calls #to_int to convert the second argument" do
- offset = mock("string index offset")
- offset.should_receive(:to_int).and_return(1)
- "abc".index("c", offset).should == 2
- end
-
- it "raises a TypeError if passed a Fixnum" do
- lambda { "abc".index 97 }.should raise_error(TypeError)
- end
-end
-
-describe "String#index with String" do
- it "behaves the same as String#index(char) for one-character strings" do
- "blablabla hello cruel world...!".split("").uniq.each do |str|
- chr = str[0]
- str.index(str).should == str.index(chr)
-
- 0.upto(str.size + 1) do |start|
- str.index(str, start).should == str.index(chr, start)
- end
-
- (-str.size - 1).upto(-1) do |start|
- str.index(str, start).should == str.index(chr, start)
- end
- end
- end
-
- it "returns the index of the first occurrence of the given substring" do
- "blablabla".index("").should == 0
- "blablabla".index("b").should == 0
- "blablabla".index("bla").should == 0
- "blablabla".index("blabla").should == 0
- "blablabla".index("blablabla").should == 0
-
- "blablabla".index("l").should == 1
- "blablabla".index("la").should == 1
- "blablabla".index("labla").should == 1
- "blablabla".index("lablabla").should == 1
-
- "blablabla".index("a").should == 2
- "blablabla".index("abla").should == 2
- "blablabla".index("ablabla").should == 2
- end
-
- it "doesn't set $~" do
- $~ = nil
-
- 'hello.'.index('ll')
- $~.should == nil
- end
-
- it "ignores string subclasses" do
- "blablabla".index(StringSpecs::MyString.new("bla")).should == 0
- StringSpecs::MyString.new("blablabla").index("bla").should == 0
- StringSpecs::MyString.new("blablabla").index(StringSpecs::MyString.new("bla")).should == 0
- end
-
- it "starts the search at the given offset" do
- "blablabla".index("bl", 0).should == 0
- "blablabla".index("bl", 1).should == 3
- "blablabla".index("bl", 2).should == 3
- "blablabla".index("bl", 3).should == 3
-
- "blablabla".index("bla", 0).should == 0
- "blablabla".index("bla", 1).should == 3
- "blablabla".index("bla", 2).should == 3
- "blablabla".index("bla", 3).should == 3
-
- "blablabla".index("blab", 0).should == 0
- "blablabla".index("blab", 1).should == 3
- "blablabla".index("blab", 2).should == 3
- "blablabla".index("blab", 3).should == 3
-
- "blablabla".index("la", 1).should == 1
- "blablabla".index("la", 2).should == 4
- "blablabla".index("la", 3).should == 4
- "blablabla".index("la", 4).should == 4
-
- "blablabla".index("lab", 1).should == 1
- "blablabla".index("lab", 2).should == 4
- "blablabla".index("lab", 3).should == 4
- "blablabla".index("lab", 4).should == 4
-
- "blablabla".index("ab", 2).should == 2
- "blablabla".index("ab", 3).should == 5
- "blablabla".index("ab", 4).should == 5
- "blablabla".index("ab", 5).should == 5
-
- "blablabla".index("", 0).should == 0
- "blablabla".index("", 1).should == 1
- "blablabla".index("", 2).should == 2
- "blablabla".index("", 7).should == 7
- "blablabla".index("", 8).should == 8
- "blablabla".index("", 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.index(needle, offset).should ==
- str.index(needle, offset + str.length)
- end
- end
- end
-
- it "returns nil if the substring isn't found" do
- "blablabla".index("B").should == nil
- "blablabla".index("z").should == nil
- "blablabla".index("BLA").should == nil
- "blablabla".index("blablablabla").should == nil
- "blablabla".index("", 10).should == nil
-
- "hello".index("he", 1).should == nil
- "hello".index("he", 2).should == nil
- end
-
- with_feature :encoding do
- it "returns the character index of a multibyte character" do
- "ありがとう".index("が").should == 2
- end
-
- it "returns the character index after offset" do
- "われわれ".index("わ", 1).should == 2
- end
-
- it "returns the character index after a partial first match" do
- "</</h".index("</h").should == 2
- end
-
- it "raises an Encoding::CompatibilityError if the encodings are incompatible" do
- char = "れ".encode Encoding::EUC_JP
- lambda do
- "あれ".index char
- end.should raise_error(Encoding::CompatibilityError)
- end
- end
-end
-
-describe "String#index with Regexp" do
- it "behaves the same as String#index(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.index(regexp).should == str.index(needle)
-
- 0.upto(str.size + 1) do |start|
- str.index(regexp, start).should == str.index(needle, start)
- end
-
- (-str.size - 1).upto(-1) do |start|
- str.index(regexp, start).should == str.index(needle, start)
- end
- end
- end
- end
-
- it "returns the index of the first match of regexp" do
- "blablabla".index(/bla/).should == 0
- "blablabla".index(/BLA/i).should == 0
-
- "blablabla".index(/.{0}/).should == 0
- "blablabla".index(/.{6}/).should == 0
- "blablabla".index(/.{9}/).should == 0
-
- "blablabla".index(/.*/).should == 0
- "blablabla".index(/.+/).should == 0
-
- "blablabla".index(/lab|b/).should == 0
-
- not_supported_on :opal do
- "blablabla".index(/\A/).should == 0
- "blablabla".index(/\Z/).should == 9
- "blablabla".index(/\z/).should == 9
- "blablabla\n".index(/\Z/).should == 9
- "blablabla\n".index(/\z/).should == 10
- end
-
- "blablabla".index(/^/).should == 0
- "\nblablabla".index(/^/).should == 0
- "b\nablabla".index(/$/).should == 1
- "bl\nablabla".index(/$/).should == 2
-
- "blablabla".index(/.l./).should == 0
- end
-
- it "sets $~ to MatchData of match and nil when there's none" do
- 'hello.'.index(/.(.)/)
- $~[0].should == 'he'
-
- 'hello.'.index(/not/)
- $~.should == nil
- end
-
- it "starts the search at the given offset" do
- "blablabla".index(/.{0}/, 5).should == 5
- "blablabla".index(/.{1}/, 5).should == 5
- "blablabla".index(/.{2}/, 5).should == 5
- "blablabla".index(/.{3}/, 5).should == 5
- "blablabla".index(/.{4}/, 5).should == 5
-
- "blablabla".index(/.{0}/, 3).should == 3
- "blablabla".index(/.{1}/, 3).should == 3
- "blablabla".index(/.{2}/, 3).should == 3
- "blablabla".index(/.{5}/, 3).should == 3
- "blablabla".index(/.{6}/, 3).should == 3
-
- "blablabla".index(/.l./, 0).should == 0
- "blablabla".index(/.l./, 1).should == 3
- "blablabla".index(/.l./, 2).should == 3
- "blablabla".index(/.l./, 3).should == 3
-
- "xblaxbla".index(/x./, 0).should == 0
- "xblaxbla".index(/x./, 1).should == 4
- "xblaxbla".index(/x./, 2).should == 4
-
- not_supported_on :opal do
- "blablabla\n".index(/\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.index(needle, offset).should ==
- str.index(needle, offset + str.length)
- end
- end
- end
-
- it "returns nil if the substring isn't found" do
- "blablabla".index(/BLA/).should == nil
-
- "blablabla".index(/.{10}/).should == nil
- "blaxbla".index(/.x/, 3).should == nil
- "blaxbla".index(/..x/, 2).should == nil
- end
-
- it "returns nil if the Regexp matches the empty string and the offset is out of range" do
- "ruby".index(//,12).should be_nil
- end
-
- it "supports \\G which matches at the given start offset" do
- "helloYOU.".index(/\GYOU/, 5).should == 5
- "helloYOU.".index(/\GYOU/).should == nil
-
- re = /\G.+YOU/
- # The # marks where \G will match.
- [
- ["#hi!YOUall.", 0],
- ["h#i!YOUall.", 1],
- ["hi#!YOUall.", 2],
- ["hi!#YOUall.", nil]
- ].each do |spec|
-
- start = spec[0].index("#")
- str = spec[0].delete("#")
-
- str.index(re, start).should == spec[1]
- end
- end
-
- it "converts start_offset to an integer via to_int" do
- obj = mock('1')
- obj.should_receive(:to_int).and_return(1)
- "RWOARW".index(/R./, obj).should == 4
- end
-
- with_feature :encoding do
- it "returns the character index of a multibyte character" do
- "ありがとう".index(/が/).should == 2
- end
-
- it "returns the character index after offset" do
- "われわれ".index(/わ/, 1).should == 2
- end
-
- it "treats the offset as a character index" do
- "われわわれ".index(/わ/, 3).should == 3
- end
-
- it "raises an Encoding::CompatibilityError if the encodings are incompatible" do
- re = Regexp.new "れ".encode(Encoding::EUC_JP)
- lambda do
- "あれ".index re
- end.should raise_error(Encoding::CompatibilityError)
- end
- end
-end
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