michael@0: /* 
michael@0:  * Ensure that flat matches with metachars in them don't have their metachars
michael@0:  * interpreted as special.
michael@0:  */
michael@0: 
michael@0: function isPatternSyntaxError(pattern) {
michael@0:     try {
michael@0:         new RegExp(pattern);
michael@0:         return false;
michael@0:     } catch (e if e instanceof SyntaxError) {
michael@0:         return true;
michael@0:     }
michael@0: }
michael@0: 
michael@0: // Bug example.
michael@0: assertEq("1+2".replace("1+2", "$&+3", "g"), "1+2+3");
michael@0: assertEq("1112".replace("1+2", "", "g"), "1112");
michael@0: 
michael@0: // ^
michael@0: assertEq("leading text^my hat".replace("^my hat", "", "g"), "leading text");
michael@0: assertEq("my hat".replace("^my hat", "", "g"), "my hat");
michael@0: 
michael@0: // $
michael@0: assertEq("leading text$my money".replace("leading text$", "", "g"), "my money");
michael@0: assertEq("leading text".replace("leading text$", "", "g"), "leading text");
michael@0: 
michael@0: // \
michael@0: var BSL = '\\';
michael@0: assertEq(("dir C:" + BSL + "Windoze").replace("C:" + BSL, "", "g"),
michael@0:          "dir Windoze");
michael@0: assertEq(isPatternSyntaxError("C:" + BSL), true);
michael@0: 
michael@0: // .
michael@0: assertEq("This is a sentence. It has words.".replace(".", "!", "g"),
michael@0:          "This is a sentence! It has words!");
michael@0: assertEq("This is an unterminated sentence".replace(".", "", "g"),
michael@0:          "This is an unterminated sentence");
michael@0: 
michael@0: // *
michael@0: assertEq("Video killed the radio *".replace(" *", "", "g"), "Video killed the radio");
michael@0: assertEq("aaa".replace("a*", "", "g"), "aaa");
michael@0: 
michael@0: // +
michael@0: assertEq("On the + side".replace(" +", "", "g"), "On the side");
michael@0: assertEq("1111111111111".replace("1+", "", "g"), "1111111111111");
michael@0: 
michael@0: // \+
michael@0: assertEq(("Inverse cone head: " + BSL + "++/").replace(BSL + "+", "", "g"),
michael@0:          "Inverse cone head: +/");
michael@0: assertEq((BSL + BSL + BSL).replace(BSL + "+", "", "g"),
michael@0:          BSL + BSL + BSL);
michael@0: 
michael@0: // \\+
michael@0: assertEq((BSL + BSL + "+").replace(BSL + BSL + "+", "", "g"), "");
michael@0: assertEq((BSL + BSL + BSL).replace(BSL + BSL + "+", "", "g"), (BSL + BSL + BSL));
michael@0: 
michael@0: // \\\
michael@0: assertEq((BSL + BSL + BSL + BSL).replace(BSL + BSL + BSL, "", "g"), BSL);
michael@0: assertEq(isPatternSyntaxError(BSL + BSL + BSL), true);
michael@0: 
michael@0: // \\\\
michael@0: assertEq((BSL + BSL + BSL + BSL).replace(BSL + BSL + BSL + BSL, "", "i"), "");
michael@0: assertEq((BSL + BSL).replace(BSL + BSL + BSL + BSL, "", "g"), BSL + BSL);
michael@0: 
michael@0: 
michael@0: // ?
michael@0: assertEq("Pressing question?".replace("?", ".", "g"), "Pressing question.");
michael@0: assertEq("a".replace("a?", "", "g"), "a");
michael@0: 
michael@0: // (
michael@0: assertEq("(a".replace("(", "", "g"), "a");
michael@0: 
michael@0: // )
michael@0: assertEq("a)".replace(")", "", "g"), "a");
michael@0: 
michael@0: // ( and )
michael@0: assertEq("(foo)".replace("(foo)", "", "g"), "");
michael@0: assertEq("a".replace("(a)", "", "g"), "a");
michael@0: 
michael@0: // [
michael@0: assertEq("[a".replace("[", "", "g"), "a");
michael@0: 
michael@0: // ]
michael@0: assertEq("a]".replace("]", "", "g"), "a");
michael@0: 
michael@0: // [ and ]
michael@0: assertEq("a".replace("[a-z]", "", "g"), "a");
michael@0: assertEq("You would write your regexp as [a-z]".replace("[a-z]", "", "g"),
michael@0:          "You would write your regexp as ");
michael@0: 
michael@0: // {
michael@0: assertEq("Numbers may be specified in the interval {1,100}".replace("{1,", "", "g"),
michael@0:          "Numbers may be specified in the interval 100}");
michael@0: 
michael@0: // }
michael@0: assertEq("Numbers may be specified in the interval {1,100}".replace(",100}", "", "g"),
michael@0:          "Numbers may be specified in the interval {1");
michael@0: 
michael@0: // { and }
michael@0: assertEq("Numbers may be specified in the interval {1,100}".replace(" {1,100}", "", "g"),
michael@0:          "Numbers may be specified in the interval");
michael@0: assertEq("aaa".replace("a{1,10}", "", "g"), "aaa");
michael@0: 
michael@0: // |
michael@0: assertEq("Mr. Gorbachev|Tear down this wall!".replace("|Tear down this wall!", "", "g"),
michael@0:          "Mr. Gorbachev");
michael@0: assertEq("foobar".replace("foo|bar", "", "g"), "foobar");
michael@0: 
michael@0: print("PASS");