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require_relative '../../spec_helper'
require_relative 'fixtures/classes'
describe "String#sub with pattern, replacement" do
it "returns a copy of self when no modification is made" do
a = "hello"
b = a.sub(/w.*$/, "*")
b.should_not equal(a)
b.should == "hello"
end
it "returns a copy of self with all occurrences of pattern replaced with replacement" do
"hello".sub(/[aeiou]/, '*').should == "h*llo"
"hello".sub(//, ".").should == ".hello"
end
it "ignores a block if supplied" do
"food".sub(/f/, "g") { "w" }.should == "good"
end
it "supports \\G which matches at the beginning of the string" do
"hello world!".sub(/\Ghello/, "hi").should == "hi world!"
end
it "supports /i for ignoring case" do
"Hello".sub(/h/i, "j").should == "jello"
"hello".sub(/H/i, "j").should == "jello"
end
it "doesn't interpret regexp metacharacters if pattern is a string" do
"12345".sub('\d', 'a').should == "12345"
'\d'.sub('\d', 'a').should == "a"
end
it "replaces \\1 sequences with the regexp's corresponding capture" do
str = "hello"
str.sub(/([aeiou])/, '<\1>').should == "h<e>llo"
str.sub(/(.)/, '\1\1').should == "hhello"
str.sub(/.(.?)/, '<\0>(\1)').should == "<he>(e)llo"
str.sub(/.(.)+/, '\1').should == "o"
str = "ABCDEFGHIJKL"
re = /#{"(.)" * 12}/
str.sub(re, '\1').should == "A"
str.sub(re, '\9').should == "I"
# Only the first 9 captures can be accessed in MRI
str.sub(re, '\10').should == "A0"
end
it "treats \\1 sequences without corresponding captures as empty strings" do
str = "hello!"
str.sub("", '<\1>').should == "<>hello!"
str.sub("h", '<\1>').should == "<>ello!"
str.sub(//, '<\1>').should == "<>hello!"
str.sub(/./, '\1\2\3').should == "ello!"
str.sub(/.(.{20})?/, '\1').should == "ello!"
end
it "replaces \\& and \\0 with the complete match" do
str = "hello!"
str.sub("", '<\0>').should == "<>hello!"
str.sub("", '<\&>').should == "<>hello!"
str.sub("he", '<\0>').should == "<he>llo!"
str.sub("he", '<\&>').should == "<he>llo!"
str.sub("l", '<\0>').should == "he<l>lo!"
str.sub("l", '<\&>').should == "he<l>lo!"
str.sub(//, '<\0>').should == "<>hello!"
str.sub(//, '<\&>').should == "<>hello!"
str.sub(/../, '<\0>').should == "<he>llo!"
str.sub(/../, '<\&>').should == "<he>llo!"
str.sub(/(.)./, '<\0>').should == "<he>llo!"
end
it "replaces \\` with everything before the current match" do
str = "hello!"
str.sub("", '<\`>').should == "<>hello!"
str.sub("h", '<\`>').should == "<>ello!"
str.sub("l", '<\`>').should == "he<he>lo!"
str.sub("!", '<\`>').should == "hello<hello>"
str.sub(//, '<\`>').should == "<>hello!"
str.sub(/..o/, '<\`>').should == "he<he>!"
end
it "replaces \\' with everything after the current match" do
str = "hello!"
str.sub("", '<\\\'>').should == "<hello!>hello!"
str.sub("h", '<\\\'>').should == "<ello!>ello!"
str.sub("ll", '<\\\'>').should == "he<o!>o!"
str.sub("!", '<\\\'>').should == "hello<>"
str.sub(//, '<\\\'>').should == "<hello!>hello!"
str.sub(/../, '<\\\'>').should == "<llo!>llo!"
end
it "replaces \\\\\\+ with \\\\+" do
"x".sub(/x/, '\\\+').should == "\\+"
end
it "replaces \\+ with the last paren that actually matched" do
str = "hello!"
str.sub(/(.)(.)/, '\+').should == "ello!"
str.sub(/(.)(.)+/, '\+').should == "!"
str.sub(/(.)()/, '\+').should == "ello!"
str.sub(/(.)(.{20})?/, '<\+>').should == "<h>ello!"
str = "ABCDEFGHIJKL"
re = /#{"(.)" * 12}/
str.sub(re, '\+').should == "L"
end
it "treats \\+ as an empty string if there was no captures" do
"hello!".sub(/./, '\+').should == "ello!"
end
it "maps \\\\ in replacement to \\" do
"hello".sub(/./, '\\\\').should == '\\ello'
end
it "leaves unknown \\x escapes in replacement untouched" do
"hello".sub(/./, '\\x').should == '\\xello'
"hello".sub(/./, '\\y').should == '\\yello'
end
it "leaves \\ at the end of replacement untouched" do
"hello".sub(/./, 'hah\\').should == 'hah\\ello'
end
ruby_version_is ''...'2.7' do
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.sub(/./, a).should.tainted?
hello_t.sub(/./, empty).should.tainted?
hello.sub(/./, a_t).should.tainted?
hello.sub(/./, empty_t).should.tainted?
hello.sub(//, empty_t).should.tainted?
hello.sub(//.taint, "foo").should_not.tainted?
end
end
it "tries to convert pattern to a string using to_str" do
pattern = mock('.')
pattern.should_receive(:to_str).and_return(".")
"hello.".sub(pattern, "!").should == "hello!"
end
not_supported_on :opal do
it "raises a TypeError when pattern is a Symbol" do
-> { "hello".sub(:woot, "x") }.should raise_error(TypeError)
end
end
it "raises a TypeError when pattern is an Array" do
-> { "hello".sub([], "x") }.should raise_error(TypeError)
end
it "raises a TypeError when pattern can't be converted to a string" do
-> { "hello".sub(Object.new, nil) }.should raise_error(TypeError)
end
it "tries to convert replacement to a string using to_str" do
replacement = mock('hello_replacement')
replacement.should_receive(:to_str).and_return("hello_replacement")
"hello".sub(/hello/, replacement).should == "hello_replacement"
end
it "raises a TypeError when replacement can't be converted to a string" do
-> { "hello".sub(/[aeiou]/, []) }.should raise_error(TypeError)
-> { "hello".sub(/[aeiou]/, 99) }.should raise_error(TypeError)
end
ruby_version_is ''...'3.0' do
it "returns subclass instances when called on a subclass" do
StringSpecs::MyString.new("").sub(//, "").should be_an_instance_of(StringSpecs::MyString)
StringSpecs::MyString.new("").sub(/foo/, "").should be_an_instance_of(StringSpecs::MyString)
StringSpecs::MyString.new("foo").sub(/foo/, "").should be_an_instance_of(StringSpecs::MyString)
StringSpecs::MyString.new("foo").sub("foo", "").should be_an_instance_of(StringSpecs::MyString)
end
end
ruby_version_is '3.0' do
it "returns String instances when called on a subclass" do
StringSpecs::MyString.new("").sub(//, "").should be_an_instance_of(String)
StringSpecs::MyString.new("").sub(/foo/, "").should be_an_instance_of(String)
StringSpecs::MyString.new("foo").sub(/foo/, "").should be_an_instance_of(String)
StringSpecs::MyString.new("foo").sub("foo", "").should be_an_instance_of(String)
end
end
it "sets $~ to MatchData of match and nil when there's none" do
'hello.'.sub('hello', 'x')
$~[0].should == 'hello'
'hello.'.sub('not', 'x')
$~.should == nil
'hello.'.sub(/.(.)/, 'x')
$~[0].should == 'he'
'hello.'.sub(/not/, 'x')
$~.should == nil
end
it "replaces \\\\\\1 with \\1" do
"ababa".sub(/(b)/, '\\\1').should == "a\\1aba"
end
it "replaces \\\\\\\\1 with \\1" do
"ababa".sub(/(b)/, '\\\\1').should == "a\\1aba"
end
it "replaces \\\\\\\\\\1 with \\" do
"ababa".sub(/(b)/, '\\\\\1').should == "a\\baba"
end
end
describe "String#sub with pattern and block" do
it "returns a copy of self with the first occurrences of pattern replaced with the block's return value" do
"hi".sub(/./) { |s| s + ' ' }.should == "h i"
"hi!".sub(/(.)(.)/) { |*a| a.inspect }.should == '["hi"]!'
end
it "sets $~ for access from the block" do
str = "hello"
str.sub(/([aeiou])/) { "<#{$~[1]}>" }.should == "h<e>llo"
str.sub(/([aeiou])/) { "<#{$1}>" }.should == "h<e>llo"
str.sub("l") { "<#{$~[0]}>" }.should == "he<l>lo"
offsets = []
str.sub(/([aeiou])/) do
md = $~
md.string.should == str
offsets << md.offset(0)
str
end.should == "hhellollo"
offsets.should == [[1, 2]]
end
it "sets $~ to MatchData of last match and nil when there's none for access from outside" do
'hello.'.sub('l') { 'x' }
$~.begin(0).should == 2
$~[0].should == 'l'
'hello.'.sub('not') { 'x' }
$~.should == nil
'hello.'.sub(/.(.)/) { 'x' }
$~[0].should == 'he'
'hello.'.sub(/not/) { 'x' }
$~.should == nil
end
it "doesn't raise a RuntimeError if the string is modified while substituting" do
str = "hello"
str.sub(//) { str[0] = 'x' }.should == "xhello"
str.should == "xello"
end
it "doesn't interpolate special sequences like \\1 for the block's return value" do
repl = '\& \0 \1 \` \\\' \+ \\\\ foo'
"hello".sub(/(.+)/) { repl }.should == repl
end
it "converts the block's return value to a string using to_s" do
obj = mock('hello_replacement')
obj.should_receive(:to_s).and_return("hello_replacement")
"hello".sub(/hello/) { obj }.should == "hello_replacement"
obj = mock('ok')
obj.should_receive(:to_s).and_return("ok")
"hello".sub(/.+/) { obj }.should == "ok"
end
ruby_version_is ''...'2.7' do
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.sub(/./) { a }.should.tainted?
hello_t.sub(/./) { empty }.should.tainted?
hello.sub(/./) { a_t }.should.tainted?
hello.sub(/./) { empty_t }.should.tainted?
hello.sub(//) { empty_t }.should.tainted?
hello.sub(//.taint) { "foo" }.should_not.tainted?
end
end
end
describe "String#sub! with pattern, replacement" do
it "modifies self in place and returns self" do
a = "hello"
a.sub!(/[aeiou]/, '*').should equal(a)
a.should == "h*llo"
end
ruby_version_is ''...'2.7' do
it "taints self if replacement is tainted" do
a = "hello"
a.sub!(/./.taint, "foo").should_not.tainted?
a.sub!(/./, "foo".taint).should.tainted?
end
end
it "returns nil if no modifications were made" do
a = "hello"
a.sub!(/z/, '*').should == nil
a.sub!(/z/, 'z').should == nil
a.should == "hello"
end
it "raises a FrozenError when self is frozen" do
s = "hello"
s.freeze
-> { s.sub!(/ROAR/, "x") }.should raise_error(FrozenError)
-> { s.sub!(/e/, "e") }.should raise_error(FrozenError)
-> { s.sub!(/[aeiou]/, '*') }.should raise_error(FrozenError)
end
end
describe "String#sub! with pattern and block" do
it "modifies self in place and returns self" do
a = "hello"
a.sub!(/[aeiou]/) { '*' }.should equal(a)
a.should == "h*llo"
end
it "sets $~ for access from the block" do
str = "hello"
str.dup.sub!(/([aeiou])/) { "<#{$~[1]}>" }.should == "h<e>llo"
str.dup.sub!(/([aeiou])/) { "<#{$1}>" }.should == "h<e>llo"
str.dup.sub!("l") { "<#{$~[0]}>" }.should == "he<l>lo"
offsets = []
str.dup.sub!(/([aeiou])/) do
md = $~
md.string.should == str
offsets << md.offset(0)
str
end.should == "hhellollo"
offsets.should == [[1, 2]]
end
ruby_version_is ''...'2.7' do
it "taints self if block's result is tainted" do
a = "hello"
a.sub!(/./.taint) { "foo" }.should_not.tainted?
a.sub!(/./) { "foo".taint }.should.tainted?
end
end
it "returns nil if no modifications were made" do
a = "hello"
a.sub!(/z/) { '*' }.should == nil
a.sub!(/z/) { 'z' }.should == nil
a.should == "hello"
end
it "raises a RuntimeError if the string is modified while substituting" do
str = "hello"
-> { str.sub!(//) { str << 'x' } }.should raise_error(RuntimeError)
end
it "raises a FrozenError when self is frozen" do
s = "hello"
s.freeze
-> { s.sub!(/ROAR/) { "x" } }.should raise_error(FrozenError)
-> { s.sub!(/e/) { "e" } }.should raise_error(FrozenError)
-> { s.sub!(/[aeiou]/) { '*' } }.should raise_error(FrozenError)
end
end
describe "String#sub with pattern and Hash" do
it "returns a copy of self with the first occurrence of pattern replaced with the value of the corresponding hash key" do
"hello".sub(/./, 'l' => 'L').should == "ello"
"hello!".sub(/(.)(.)/, 'he' => 'she ', 'll' => 'said').should == 'she llo!'
"hello".sub('l', 'l' => 'el').should == 'heello'
end
it "removes keys that don't correspond to matches" do
"hello".sub(/./, 'z' => 'b', 'o' => 'ow').should == "ello"
end
it "ignores non-String keys" do
"tattoo".sub(/(tt)/, 'tt' => 'b', tt: 'z').should == "taboo"
end
it "uses a key's value only a single time" do
"food".sub(/o/, 'o' => '0').should == "f0od"
end
it "uses the hash's default value for missing keys" do
hsh = {}
hsh.default='?'
hsh['o'] = '0'
"food".sub(/./, hsh).should == "?ood"
end
it "coerces the hash values with #to_s" do
hsh = {}
hsh.default=[]
hsh['o'] = 0
obj = mock('!')
obj.should_receive(:to_s).and_return('!')
hsh['f'] = obj
"food!".sub(/./, hsh).should == "!ood!"
end
it "uses the hash's value set from default_proc for missing keys" do
hsh = {}
hsh.default_proc = -> k, v { 'lamb' }
"food!".sub(/./, hsh).should == "lambood!"
end
it "sets $~ to MatchData of first match and nil when there's none for access from outside" do
'hello.'.sub('l', 'l' => 'L')
$~.begin(0).should == 2
$~[0].should == 'l'
'hello.'.sub('not', 'ot' => 'to')
$~.should == nil
'hello.'.sub(/.(.)/, 'o' => ' hole')
$~[0].should == 'he'
'hello.'.sub(/not/, 'z' => 'glark')
$~.should == nil
end
it "doesn't interpolate special sequences like \\1 for the block's return value" do
repl = '\& \0 \1 \` \\\' \+ \\\\ foo'
"hello".sub(/(.+)/, 'hello' => repl ).should == repl
end
ruby_version_is ''...'2.7' do
it "untrusts the result if the original string is untrusted" do
str = "Ghana".untrust
str.sub(/[Aa]na/, 'ana' => '').untrusted?.should be_true
end
it "untrusts the result if a hash value is untrusted" do
str = "Ghana"
str.sub(/a$/, 'a' => 'di'.untrust).untrusted?.should be_true
end
it "taints the result if the original string is tainted" do
str = "Ghana".taint
str.sub(/[Aa]na/, 'ana' => '').tainted?.should be_true
end
it "taints the result if a hash value is tainted" do
str = "Ghana"
str.sub(/a$/, 'a' => 'di'.taint).tainted?.should be_true
end
end
end
describe "String#sub! with pattern and Hash" do
it "returns self with the first occurrence of pattern replaced with the value of the corresponding hash key" do
"hello".sub!(/./, 'l' => 'L').should == "ello"
"hello!".sub!(/(.)(.)/, 'he' => 'she ', 'll' => 'said').should == 'she llo!'
"hello".sub!('l', 'l' => 'el').should == 'heello'
end
it "removes keys that don't correspond to matches" do
"hello".sub!(/./, 'z' => 'b', 'o' => 'ow').should == "ello"
end
it "ignores non-String keys" do
"hello".sub!(/(ll)/, 'll' => 'r', ll: 'z').should == "hero"
end
it "uses a key's value only a single time" do
"food".sub!(/o/, 'o' => '0').should == "f0od"
end
it "uses the hash's default value for missing keys" do
hsh = {}
hsh.default='?'
hsh['o'] = '0'
"food".sub!(/./, hsh).should == "?ood"
end
it "coerces the hash values with #to_s" do
hsh = {}
hsh.default=[]
hsh['o'] = 0
obj = mock('!')
obj.should_receive(:to_s).and_return('!')
hsh['f'] = obj
"food!".sub!(/./, hsh).should == "!ood!"
end
it "uses the hash's value set from default_proc for missing keys" do
hsh = {}
hsh.default_proc = -> k, v { 'lamb' }
"food!".sub!(/./, hsh).should == "lambood!"
end
it "sets $~ to MatchData of first match and nil when there's none for access from outside" do
'hello.'.sub!('l', 'l' => 'L')
$~.begin(0).should == 2
$~[0].should == 'l'
'hello.'.sub!('not', 'ot' => 'to')
$~.should == nil
'hello.'.sub!(/.(.)/, 'o' => ' hole')
$~[0].should == 'he'
'hello.'.sub!(/not/, 'z' => 'glark')
$~.should == nil
end
it "doesn't interpolate special sequences like \\1 for the block's return value" do
repl = '\& \0 \1 \` \\\' \+ \\\\ foo'
"hello".sub!(/(.+)/, 'hello' => repl ).should == repl
end
ruby_version_is ''...'2.7' do
it "keeps untrusted state" do
str = "Ghana".untrust
str.sub!(/[Aa]na/, 'ana' => '').untrusted?.should be_true
end
it "untrusts self if a hash value is untrusted" do
str = "Ghana"
str.sub!(/a$/, 'a' => 'di'.untrust).untrusted?.should be_true
end
it "keeps tainted state" do
str = "Ghana".taint
str.sub!(/[Aa]na/, 'ana' => '').tainted?.should be_true
end
it "taints self if a hash value is tainted" do
str = "Ghana"
str.sub!(/a$/, 'a' => 'di'.taint).tainted?.should be_true
end
end
end
describe "String#sub with pattern and without replacement and block" do
it "raises a ArgumentError" do
-> { "abca".sub(/a/) }.should raise_error(ArgumentError)
end
end
describe "String#sub! with pattern and without replacement and block" do
it "raises a ArgumentError" do
-> { "abca".sub!(/a/) }.should raise_error(ArgumentError)
end
end
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