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Diffstat (limited to 'spec/rubyspec/language/regexp/escapes_spec.rb')
-rw-r--r-- | spec/rubyspec/language/regexp/escapes_spec.rb | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/spec/rubyspec/language/regexp/escapes_spec.rb b/spec/rubyspec/language/regexp/escapes_spec.rb new file mode 100644 index 0000000000..50ac22e51e --- /dev/null +++ b/spec/rubyspec/language/regexp/escapes_spec.rb @@ -0,0 +1,81 @@ +# -*- encoding: binary -*- +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../../fixtures/classes', __FILE__) + +describe "Regexps with escape characters" do + it "they're supported" do + /\t/.match("\t").to_a.should == ["\t"] # horizontal tab + /\v/.match("\v").to_a.should == ["\v"] # vertical tab + /\n/.match("\n").to_a.should == ["\n"] # newline + /\r/.match("\r").to_a.should == ["\r"] # return + /\f/.match("\f").to_a.should == ["\f"] # form feed + /\a/.match("\a").to_a.should == ["\a"] # bell + /\e/.match("\e").to_a.should == ["\e"] # escape + + # \nnn octal char (encoded byte value) + end + + it "support quoting meta-characters via escape sequence" do + /\\/.match("\\").to_a.should == ["\\"] + /\//.match("/").to_a.should == ["/"] + # parenthesis, etc + /\(/.match("(").to_a.should == ["("] + /\)/.match(")").to_a.should == [")"] + /\[/.match("[").to_a.should == ["["] + /\]/.match("]").to_a.should == ["]"] + /\{/.match("{").to_a.should == ["{"] + /\}/.match("}").to_a.should == ["}"] + # alternation separator + /\|/.match("|").to_a.should == ["|"] + # quantifiers + /\?/.match("?").to_a.should == ["?"] + /\./.match(".").to_a.should == ["."] + /\*/.match("*").to_a.should == ["*"] + /\+/.match("+").to_a.should == ["+"] + # line anchors + /\^/.match("^").to_a.should == ["^"] + /\$/.match("$").to_a.should == ["$"] + end + + it "allows any character to be escaped" do + /\y/.match("y").to_a.should == ["y"] + end + + it "support \\x (hex characters)" do + /\xA/.match("\nxyz").to_a.should == ["\n"] + /\x0A/.match("\n").to_a.should == ["\n"] + /\xAA/.match("\nA").should be_nil + /\x0AA/.match("\nA").to_a.should == ["\nA"] + /\xAG/.match("\nG").to_a.should == ["\nG"] + # Non-matches + lambda { eval('/\xG/') }.should raise_error(SyntaxError) + + # \x{7HHHHHHH} wide hexadecimal char (character code point value) + end + + it "support \\c (control characters)" do + #/\c \c@\c`/.match("\00\00\00").to_a.should == ["\00\00\00"] + /\c#\cc\cC/.match("\03\03\03").to_a.should == ["\03\03\03"] + /\c'\cG\cg/.match("\a\a\a").to_a.should == ["\a\a\a"] + /\c(\cH\ch/.match("\b\b\b").to_a.should == ["\b\b\b"] + /\c)\cI\ci/.match("\t\t\t").to_a.should == ["\t\t\t"] + /\c*\cJ\cj/.match("\n\n\n").to_a.should == ["\n\n\n"] + /\c+\cK\ck/.match("\v\v\v").to_a.should == ["\v\v\v"] + /\c,\cL\cl/.match("\f\f\f").to_a.should == ["\f\f\f"] + /\c-\cM\cm/.match("\r\r\r").to_a.should == ["\r\r\r"] + + /\cJ/.match("\r").should be_nil + + # Parsing precedence + /\cJ+/.match("\n\n").to_a.should == ["\n\n"] # Quantifers apply to entire escape sequence + /\\cJ/.match("\\cJ").to_a.should == ["\\cJ"] + lambda { eval('/[abc\x]/') }.should raise_error(SyntaxError) # \x is treated as a escape sequence even inside a character class + # Syntax error + lambda { eval('/\c/') }.should raise_error(SyntaxError) + + # \cx control char (character code point value) + # \C-x control char (character code point value) + # \M-x meta (x|0x80) (character code point value) + # \M-\C-x meta control char (character code point value) + end +end |