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Diffstat (limited to 'spec/ruby/core/string/sub_spec.rb')
-rw-r--r-- | spec/ruby/core/string/sub_spec.rb | 571 |
1 files changed, 571 insertions, 0 deletions
diff --git a/spec/ruby/core/string/sub_spec.rb b/spec/ruby/core/string/sub_spec.rb new file mode 100644 index 0000000000..deaa7e27f1 --- /dev/null +++ b/spec/ruby/core/string/sub_spec.rb @@ -0,0 +1,571 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../fixtures/classes.rb', __FILE__) + +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 + + 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).tainted?.should == true + hello_t.sub(/./, empty).tainted?.should == true + + hello.sub(/./, a_t).tainted?.should == true + hello.sub(/./, empty_t).tainted?.should == true + hello.sub(//, empty_t).tainted?.should == true + + hello.sub(//.taint, "foo").tainted?.should == false + 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 + lambda { "hello".sub(:woot, "x") }.should raise_error(TypeError) + end + end + + it "raises a TypeError when pattern is an Array" do + lambda { "hello".sub([], "x") }.should raise_error(TypeError) + end + + it "raises a TypeError when pattern can't be converted to a string" do + lambda { "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 + lambda { "hello".sub(/[aeiou]/, []) }.should raise_error(TypeError) + lambda { "hello".sub(/[aeiou]/, 99) }.should raise_error(TypeError) + end + + 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 + + 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 + + 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 }.tainted?.should == true + hello_t.sub(/./) { empty }.tainted?.should == true + + hello.sub(/./) { a_t }.tainted?.should == true + hello.sub(/./) { empty_t }.tainted?.should == true + hello.sub(//) { empty_t }.tainted?.should == true + + hello.sub(//.taint) { "foo" }.tainted?.should == false + 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 + + it "taints self if replacement is tainted" do + a = "hello" + a.sub!(/./.taint, "foo").tainted?.should == false + a.sub!(/./, "foo".taint).tainted?.should == true + 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 when self is frozen" do + s = "hello" + s.freeze + + lambda { s.sub!(/ROAR/, "x") }.should raise_error(RuntimeError) + lambda { s.sub!(/e/, "e") }.should raise_error(RuntimeError) + lambda { s.sub!(/[aeiou]/, '*') }.should raise_error(RuntimeError) + 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 + + it "taints self if block's result is tainted" do + a = "hello" + a.sub!(/./.taint) { "foo" }.tainted?.should == false + a.sub!(/./) { "foo".taint }.tainted?.should == true + 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" + lambda { str.sub!(//) { str << 'x' } }.should raise_error(RuntimeError) + end + + it "raises a RuntimeError when self is frozen" do + s = "hello" + s.freeze + + lambda { s.sub!(/ROAR/) { "x" } }.should raise_error(RuntimeError) + lambda { s.sub!(/e/) { "e" } }.should raise_error(RuntimeError) + lambda { s.sub!(/[aeiou]/) { '*' } }.should raise_error(RuntimeError) + 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 = lambda { |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') + $~.should == nil + end + + it "doesn't interpolate special sequences like \\1 for the block's return value" do + repl = '\& \0 \1 \` \\\' \+ \\\\ foo' + "hello".sub(/(.+)/, 'hello' => repl ).should == repl + end + + it "untrusts the result if the original string is untrusted" do + str = "Ghana".untrust + str.sub(/[Aa]na/, 'ana' => '').untrusted?.should be_true + end + + it "untrusts the result if a hash value is untrusted" do + str = "Ghana" + str.sub(/a$/, '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 + +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 = lambda { |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') + $~.should == nil + end + + it "doesn't interpolate special sequences like \\1 for the block's return value" do + repl = '\& \0 \1 \` \\\' \+ \\\\ foo' + "hello".sub!(/(.+)/, 'hello' => repl ).should == repl + end + + it "keeps untrusted state" do + str = "Ghana".untrust + str.sub!(/[Aa]na/, 'ana' => '').untrusted?.should be_true + end + + it "untrusts self if a hash value is untrusted" do + str = "Ghana" + str.sub!(/a$/, '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 + +describe "String#sub with pattern and without replacement and block" do + it "raises a ArgumentError" do + lambda { "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 + lambda { "abca".sub!(/a/) }.should raise_error(ArgumentError) + end +end |