/Languages/Ruby/Tests/mspec/rubyspec/core/string/gsub_spec.rb
Ruby | 518 lines | 487 code | 31 blank | 0 comment | 37 complexity | c071e151ad2afb269c779f1ee1992f55 MD5 | raw file
Possible License(s): CPL-1.0, BSD-3-Clause, ISC, GPL-2.0, MPL-2.0-no-copyleft-exception
- require File.dirname(__FILE__) + '/../../spec_helper'
- require File.dirname(__FILE__) + '/fixtures/classes.rb'
- describe "String#gsub with pattern and replacement" do
- it "doesn't freak out when replacing ^" do
- "Text\n".gsub(/^/, ' ').should == " Text\n"
- "Text\nFoo".gsub(/^/, ' ').should == " Text\n Foo"
- end
- it "returns a copy of self with all occurrences of pattern replaced with replacement" do
- "hello".gsub(/[aeiou]/, '*').should == "h*ll*"
- str = "hello homely world. hah!"
- str.gsub(/\Ah\S+\s*/, "huh? ").should == "huh? homely world. hah!"
- "hello".gsub(//, ".").should == ".h.e.l.l.o."
- end
-
- it "ignores a block if supplied" do
- "food".gsub(/f/, "g") { "w" }.should == "good"
- end
- it "supports \\G which matches at the beginning of the remaining (non-matched) string" do
- str = "hello homely world. hah!"
- str.gsub(/\Gh\S+\s*/, "huh? ").should == "huh? huh? world. hah!"
- end
-
- it "supports /i for ignoring case" do
- str = "Hello. How happy are you?"
- str.gsub(/h/i, "j").should == "jello. jow jappy are you?"
- str.gsub(/H/i, "j").should == "jello. jow jappy are you?"
- end
-
- it "doesn't interpret regexp metacharacters if pattern is a string" do
- "12345".gsub('\d', 'a').should == "12345"
- '\d'.gsub('\d', 'a').should == "a"
- end
-
- it "replaces \\1 sequences with the regexp's corresponding capture" do
- str = "hello"
-
- str.gsub(/([aeiou])/, '<\1>').should == "h<e>ll<o>"
- str.gsub(/(.)/, '\1\1').should == "hheelllloo"
- str.gsub(/.(.?)/, '<\0>(\1)').should == "<he>(e)<ll>(l)<o>()"
- str.gsub(/.(.)+/, '\1').should == "o"
- str = "ABCDEFGHIJKLabcdefghijkl"
- re = /#{"(.)" * 12}/
- str.gsub(re, '\1').should == "Aa"
- str.gsub(re, '\9').should == "Ii"
- # Only the first 9 captures can be accessed in MRI
- str.gsub(re, '\10').should == "A0a0"
- end
- it "treats \\1 sequences without corresponding captures as empty strings" do
- str = "hello!"
-
- str.gsub("", '<\1>').should == "<>h<>e<>l<>l<>o<>!<>"
- str.gsub("h", '<\1>').should == "<>ello!"
- str.gsub(//, '<\1>').should == "<>h<>e<>l<>l<>o<>!<>"
- str.gsub(/./, '\1\2\3').should == ""
- str.gsub(/.(.{20})?/, '\1').should == ""
- end
- it "replaces \\& and \\0 with the complete match" do
- str = "hello!"
-
- str.gsub("", '<\0>').should == "<>h<>e<>l<>l<>o<>!<>"
- str.gsub("", '<\&>').should == "<>h<>e<>l<>l<>o<>!<>"
- str.gsub("he", '<\0>').should == "<he>llo!"
- str.gsub("he", '<\&>').should == "<he>llo!"
- str.gsub("l", '<\0>').should == "he<l><l>o!"
- str.gsub("l", '<\&>').should == "he<l><l>o!"
-
- str.gsub(//, '<\0>').should == "<>h<>e<>l<>l<>o<>!<>"
- str.gsub(//, '<\&>').should == "<>h<>e<>l<>l<>o<>!<>"
- str.gsub(/../, '<\0>').should == "<he><ll><o!>"
- str.gsub(/../, '<\&>').should == "<he><ll><o!>"
- str.gsub(/(.)./, '<\0>').should == "<he><ll><o!>"
- end
- it "replaces \\` with everything before the current match" do
- str = "hello!"
-
- str.gsub("", '<\`>').should == "<>h<h>e<he>l<hel>l<hell>o<hello>!<hello!>"
- str.gsub("h", '<\`>').should == "<>ello!"
- str.gsub("l", '<\`>').should == "he<he><hel>o!"
- str.gsub("!", '<\`>').should == "hello<hello>"
-
- str.gsub(//, '<\`>').should == "<>h<h>e<he>l<hel>l<hell>o<hello>!<hello!>"
- str.gsub(/../, '<\`>').should == "<><he><hell>"
- end
- it "replaces \\' with everything after the current match" do
- str = "hello!"
-
- str.gsub("", '<\\\'>').should == "<hello!>h<ello!>e<llo!>l<lo!>l<o!>o<!>!<>"
- str.gsub("h", '<\\\'>').should == "<ello!>ello!"
- str.gsub("ll", '<\\\'>').should == "he<o!>o!"
- str.gsub("!", '<\\\'>').should == "hello<>"
-
- str.gsub(//, '<\\\'>').should == "<hello!>h<ello!>e<llo!>l<lo!>l<o!>o<!>!<>"
- str.gsub(/../, '<\\\'>').should == "<llo!><o!><>"
- end
-
- it "replaces \\+ with the last paren that actually matched" do
- str = "hello!"
-
- str.gsub(/(.)(.)/, '\+').should == "el!"
- str.gsub(/(.)(.)+/, '\+').should == "!"
- str.gsub(/(.)()/, '\+').should == ""
- str.gsub(/(.)(.{20})?/, '<\+>').should == "<h><e><l><l><o><!>"
- str = "ABCDEFGHIJKLabcdefghijkl"
- re = /#{"(.)" * 12}/
- str.gsub(re, '\+').should == "Ll"
- end
- it "treats \\+ as an empty string if there was no captures" do
- "hello!".gsub(/./, '\+').should == ""
- end
-
- it "maps \\\\ in replacement to \\" do
- "hello".gsub(/./, '\\\\').should == '\\' * 5
- end
- it "leaves unknown \\x escapes in replacement untouched" do
- "hello".gsub(/./, '\\x').should == '\\x' * 5
- "hello".gsub(/./, '\\y').should == '\\y' * 5
- end
- it "leaves \\ at the end of replacement untouched" do
- "hello".gsub(/./, 'hah\\').should == 'hah\\' * 5
- end
-
- it "taints the result if the original string or replacement is tainted" do
- hello = "hello"
- hello_t = "hello"
- a = "a"
- a_t = "a"
- empty = ""
- empty_t = ""
-
- hello_t.taint; a_t.taint; empty_t.taint
-
- hello_t.gsub(/./, a).tainted?.should == true
- hello_t.gsub(/./, empty).tainted?.should == true
- hello.gsub(/./, a_t).tainted?.should == true
- hello.gsub(/./, empty_t).tainted?.should == true
- hello.gsub(//, empty_t).tainted?.should == true
-
- hello.gsub(//.taint, "foo").tainted?.should == false
- end
- ruby_version_is "1.9" do
- it "untrusts the result if the original string or replacement is untrusted" do
- hello = "hello"
- hello_t = "hello"
- a = "a"
- a_t = "a"
- empty = ""
- empty_t = ""
- hello_t.untrust; a_t.untrust; empty_t.untrust
- hello_t.gsub(/./, a).untrusted?.should == true
- hello_t.gsub(/./, empty).untrusted?.should == true
- hello.gsub(/./, a_t).untrusted?.should == true
- hello.gsub(/./, empty_t).untrusted?.should == true
- hello.gsub(//, empty_t).untrusted?.should == true
- hello.gsub(//.untrust, "foo").untrusted?.should == false
- end
- end
- it "tries to convert pattern to a string using to_str" do
- pattern = mock('.')
- def pattern.to_str() "." end
-
- "hello.".gsub(pattern, "!").should == "hello!"
- end
- it "raises a TypeError when pattern can't be converted to a string" do
- lambda { "hello".gsub([], "x") }.should raise_error(TypeError)
- lambda { "hello".gsub(Object.new, "x") }.should raise_error(TypeError)
- lambda { "hello".gsub(nil, "x") }.should raise_error(TypeError)
- end
-
- it "tries to convert replacement to a string using to_str" do
- replacement = mock('hello_replacement')
- def replacement.to_str() "hello_replacement" end
-
- "hello".gsub(/hello/, replacement).should == "hello_replacement"
- end
-
- it "raises a TypeError when replacement can't be converted to a string" do
- lambda { "hello".gsub(/[aeiou]/, []) }.should raise_error(TypeError)
- lambda { "hello".gsub(/[aeiou]/, Object.new) }.should raise_error(TypeError)
- lambda { "hello".gsub(/[aeiou]/, nil) }.should raise_error(TypeError)
- end
-
- it "returns subclass instances when called on a subclass" do
- StringSpecs::MyString.new("").gsub(//, "").class.should == StringSpecs::MyString
- StringSpecs::MyString.new("").gsub(/foo/, "").class.should == StringSpecs::MyString
- StringSpecs::MyString.new("foo").gsub(/foo/, "").class.should == StringSpecs::MyString
- StringSpecs::MyString.new("foo").gsub("foo", "").class.should == StringSpecs::MyString
- end
- # Note: $~ cannot be tested because mspec messes with it
-
- it "sets $~ to MatchData of last match and nil when there's none" do
- 'hello.'.gsub('hello', 'x')
- $~[0].should == 'hello'
-
- 'hello.'.gsub('not', 'x')
- $~.should == nil
-
- 'hello.'.gsub(/.(.)/, 'x')
- $~[0].should == 'o.'
-
- 'hello.'.gsub(/not/, 'x')
- $~.should == nil
- end
- end
- ruby_version_is "1.9" do
- describe "String#gsub with pattern and Hash" do
-
- it "returns a copy of self with all occurrences of pattern replaced with the value of the corresponding hash key" do
- "hello".gsub(/./, 'l' => 'L').should == "LL"
- "hello!".gsub(/(.)(.)/, 'he' => 'she ', 'll' => 'said').should == 'she said'
- "hello".gsub('l', 'l' => 'el').should == 'heelelo'
- end
-
- it "ignores keys that don't correspond to matches" do
- "hello".gsub(/./, 'z' => 'L', 'h' => 'b', 'o' => 'ow').should == "bow"
- end
- it "returns an empty string if the pattern matches but the hash specifies no replacements" do
- "hello".gsub(/./, 'z' => 'L').should == ""
- end
- it "ignores non-String keys" do
- "hello".gsub(/(ll)/, 'll' => 'r', :ll => 'z').should == "hero"
- end
- it "uses a key's value as many times as needed" do
- "food".gsub(/o/, 'o' => '0').should == "f00d"
- end
- it "uses the hash's default value for missing keys" do
- hsh = new_hash
- hsh.default='?'
- hsh['o'] = '0'
- "food".gsub(/./, hsh).should == "?00?"
- end
- it "coerces the hash values with #to_s" do
- hsh = new_hash
- hsh.default=[]
- hsh['o'] = 0
- obj = mock('!')
- obj.should_receive(:to_s).and_return('!')
- hsh['!'] = obj
- "food!".gsub(/./, hsh).should == "[]00[]!"
- end
- it "raises a TypeError if the hash has a default proc" do
- hsh = new_hash
- hsh.default_proc = lambda { |k,v| 'lamb' }
- lambda do
- "food!".gsub(/./, hsh)
- end.should_not raise_error(TypeError)
- end
-
- it "sets $~ to MatchData of last match and nil when there's none for access from outside" do
- 'hello.'.gsub('l', 'l' => 'L')
- $~.begin(0).should == 3
- $~[0].should == 'l'
- 'hello.'.gsub('not', 'ot' => 'to')
- $~.should == nil
- 'hello.'.gsub(/.(.)/, 'o' => ' hole')
- $~[0].should == 'o.'
- 'hello.'.gsub(/not/, 'z' => 'glark')
- $~.should == nil
- end
- it "doesn't interpolate special sequences like \\1 for the block's return value" do
- repl = '\& \0 \1 \` \\\' \+ \\\\ foo'
- "hello".gsub(/(.+)/, 'hello' => repl ).should == repl
- end
-
- it "untrusts the result if the original string is untrusted" do
- str = "Ghana".untrust
- str.gsub(/[Aa]na/, 'ana' => '').untrusted?.should be_true
- end
- it "untrusts the result if a hash value is untrusted" do
- str = "Ghana"
- str.gsub(/a$/, 'a' => 'di'.untrust).untrusted?.should be_true
- end
- it "taints the result if the original string is tainted" do
- str = "Ghana".taint
- str.gsub(/[Aa]na/, 'ana' => '').tainted?.should be_true
- end
- it "taints the result if a hash value is tainted" do
- str = "Ghana"
- str.gsub(/a$/, 'a' => 'di'.taint).tainted?.should be_true
- end
- end
- end
- describe "String#gsub with pattern and block" do
- it "returns a copy of self with all occurrences of pattern replaced with the block's return value" do
- "hello".gsub(/./) { |s| s.succ + ' ' }.should == "i f m m p "
- "hello!".gsub(/(.)(.)/) { |*a| a.inspect }.should == '["he"]["ll"]["o!"]'
- "hello".gsub('l') { 'x'}.should == 'hexxo'
- end
-
- it "sets $~ for access from the block" do
- str = "hello"
- str.gsub(/([aeiou])/) { "<#{$~[1]}>" }.should == "h<e>ll<o>"
- str.gsub(/([aeiou])/) { "<#{$1}>" }.should == "h<e>ll<o>"
- str.gsub("l") { "<#{$~[0]}>" }.should == "he<l><l>o"
-
- offsets = []
-
- str.gsub(/([aeiou])/) do
- md = $~
- md.string.should == str
- offsets << md.offset(0)
- str
- end.should == "hhellollhello"
-
- offsets.should == [[1, 2], [4, 5]]
- end
-
- it "restores $~ after leaving the block" do
- [/./, "l"].each do |pattern|
- old_md = nil
- "hello".gsub(pattern) do
- old_md = $~
- "ok".match(/./)
- "x"
- end
- $~[0].should == old_md[0]
- $~.string.should == "hello"
- end
- end
- it "sets $~ to MatchData of last match and nil when there's none for access from outside" do
- 'hello.'.gsub('l') { 'x' }
- $~.begin(0).should == 3
- $~[0].should == 'l'
- 'hello.'.gsub('not') { 'x' }
- $~.should == nil
- 'hello.'.gsub(/.(.)/) { 'x' }
- $~[0].should == 'o.'
- 'hello.'.gsub(/not/) { 'x' }
- $~.should == nil
- end
- ruby_version_is ""..."1.9" do
- it "raises a RuntimeError if the string is modified while substituting" do
- str = "hello"
- lambda { str.gsub(//) { str[0] = 'x' } }.should raise_error(RuntimeError)
- end
- end
-
- it "doesn't interpolate special sequences like \\1 for the block's return value" do
- repl = '\& \0 \1 \` \\\' \+ \\\\ foo'
- "hello".gsub(/(.+)/) { repl }.should == repl
- end
-
- it "converts the block's return value to a string using to_s" do
- replacement = mock('hello_replacement')
- def replacement.to_s() "hello_replacement" end
-
- "hello".gsub(/hello/) { replacement }.should == "hello_replacement"
-
- obj = mock('ok')
- def obj.to_s() "ok" end
-
- "hello".gsub(/.+/) { obj }.should == "ok"
- end
- ruby_version_is "1.9" do
- it "untrusts the result if the original string or replacement is untrusted" do
- hello = "hello"
- hello_t = "hello"
- a = "a"
- a_t = "a"
- empty = ""
- empty_t = ""
- hello_t.untrust; a_t.untrust; empty_t.untrust
- hello_t.gsub(/./) { a }.untrusted?.should == true
- hello_t.gsub(/./) { empty }.untrusted?.should == true
- hello.gsub(/./) { a_t }.untrusted?.should == true
- hello.gsub(/./) { empty_t }.untrusted?.should == true
- hello.gsub(//) { empty_t }.untrusted?.should == true
- hello.gsub(//.untrust) { "foo" }.untrusted?.should == false
- end
- end
- end
- describe "String#gsub! with pattern and replacement" do
- it "modifies self in place and returns self" do
- a = "hello"
- a.gsub!(/[aeiou]/, '*').should equal(a)
- a.should == "h*ll*"
- end
- it "taints self if replacement is tainted" do
- a = "hello"
- a.gsub!(/./.taint, "foo").tainted?.should == false
- a.gsub!(/./, "foo".taint).tainted?.should == true
- end
- ruby_version_is "1.9" do
- it "untrusts self if replacement is untrusted" do
- a = "hello"
- a.gsub!(/./.untrust, "foo").untrusted?.should == false
- a.gsub!(/./, "foo".untrust).untrusted?.should == true
- end
- end
-
- it "returns nil if no modifications were made" do
- a = "hello"
- a.gsub!(/z/, '*').should == nil
- a.gsub!(/z/, 'z').should == nil
- a.should == "hello"
- end
-
- ruby_version_is ""..."1.9" do
- it "raises a TypeError when self is frozen" do
- s = "hello"
- s.freeze
-
- s.gsub!(/ROAR/, "x") # ok
- lambda { s.gsub!(/e/, "e") }.should raise_error(TypeError)
- lambda { s.gsub!(/[aeiou]/, '*') }.should raise_error(TypeError)
- end
- end
- ruby_version_is "1.9" do
- ruby_bug "[ruby-core:23666]", "1.9.2" do
- it "raises a RuntimeError when self is frozen" do
- s = "hello"
- s.freeze
-
- lambda { s.gsub!(/ROAR/, "x") }.should raise_error(RuntimeError)
- lambda { s.gsub!(/e/, "e") }.should raise_error(RuntimeError)
- lambda { s.gsub!(/[aeiou]/, '*') }.should raise_error(RuntimeError)
- end
- end
- end
- end
- describe "String#gsub! with pattern and block" do
- it "modifies self in place and returns self" do
- a = "hello"
- a.gsub!(/[aeiou]/) { '*' }.should equal(a)
- a.should == "h*ll*"
- end
- it "taints self if block's result is tainted" do
- a = "hello"
- a.gsub!(/./.taint) { "foo" }.tainted?.should == false
- a.gsub!(/./) { "foo".taint }.tainted?.should == true
- end
- ruby_version_is "1.9" do
- it "untrusts self if block's result is untrusted" do
- a = "hello"
- a.gsub!(/./.untrust) { "foo" }.untrusted?.should == false
- a.gsub!(/./) { "foo".untrust }.untrusted?.should == true
- end
- end
-
- it "returns nil if no modifications were made" do
- a = "hello"
- a.gsub!(/z/) { '*' }.should == nil
- a.gsub!(/z/) { 'z' }.should == nil
- a.should == "hello"
- end
-
- ruby_bug "[ruby-core:23663]", "1.9" do
- it "raises a RuntimeError when self is frozen" do
- s = "hello"
- s.freeze
- lambda { s.gsub!(/ROAR/) { "x" } }.should raise_error(RuntimeError)
- lambda { s.gsub!(/e/) { "e" } }.should raise_error(RuntimeError)
- lambda { s.gsub!(/[aeiou]/) { '*' } }.should raise_error(RuntimeError)
- end
- end
- end