Handle UNC paths in windows (fixes #23)

lib/MemoryFileSystem.js

@@ -38,8 +38,16 @@ function isFile(item) {
 
 function pathToArray(path) {
 	path = normalize(path);
+
+	var unc = /^\\\\/.test(path);
 	var nix = /^\//.test(path);
-	if(!nix) {
+
+	if(unc) {
+		path = path.slice(2);
+		path = path.replace(/[\\\/]+/g, "\\");
+		path = path.split(/[\\\/]/);
+		path[0] = '\\\\' + path[0];
+	} else if(!nix) {
 		if(!/^[A-Za-z]:/.test(path)) {
 			throw new MemoryFileSystemError(errors.code.EINVAL, path);
 		}

lib/join.js

@@ -1,6 +1,6 @@
 var normalize = require("./normalize");
 
-var absoluteWinRegExp = /^[A-Z]:([\\\/]|$)/i;
+var absoluteWinRegExp = /^(?:[A-Z]:([\\\/]|$))|(\\\\)/i;
 var absoluteNixRegExp = /^\//i;
 
 module.exports = function join(path, request) {

lib/normalize.js

@@ -1,4 +1,4 @@
-var doubleSlashWinRegExp = /\\+/g;
+var doubleSlashWinRegExp = /(?!^)\\+/g;;
 var doubleSlashNixRegExp = /\/+/g;
 var currentDirectoryWinMiddleRegExp = /\\(\.\\)+/;
 var currentDirectoryWinEndRegExp = /\\\.$/;
@@ -34,5 +34,7 @@ module.exports = function normalize(path) {
 	path = path.replace(parentDirectoryNixEndRegExp2, "");
 	path = path.replace(parentDirectoryNixEndRegExp3, "/");
 
-	return path.replace(doubleSlashWinRegExp, "\\").replace(doubleSlashNixRegExp, "/");
-};
+	path = path.replace(doubleSlashWinRegExp, "\\").replace(doubleSlashNixRegExp, "/");
+
+	return path;
+};

test/MemoryFileSystem.js

@@ -333,6 +333,8 @@ describe("normalize", function() {
 		fs.normalize("C:\\a\\b\\\c\\..\\..").should.be.eql("C:\\a");
 		fs.normalize("C:\\a\\b\\d\\..\\c\\..\\..").should.be.eql("C:\\a");
 		fs.normalize("C:\\a\\b\\d\\\\.\\\\.\\c\\.\\..").should.be.eql("C:\\a\\b\\d");
+		fs.normalize("\\\\a\\\\b").should.be.eql("\\\\a\\b");
+		fs.normalize("\\\\a\\\\b\\..\\c").should.be.eql("\\\\a\\c");
 	});
 });
 describe("pathToArray", function() {
@@ -341,6 +343,7 @@ describe("pathToArray", function() {
 		fs.pathToArray("/a/b/c").should.be.eql(["a", "b", "c"]);
 		fs.pathToArray("C:/a/b").should.be.eql(["C:", "a", "b"]);
 		fs.pathToArray("C:\\a\\b").should.be.eql(["C:", "a", "b"]);
+		fs.pathToArray("\\\\a\\b\\c").should.be.eql(["\\\\a", "b", "c"]);
 	});
 	it("should fail on invalid paths", function() {
 		(function() {
@@ -363,6 +366,7 @@ describe("join", function() {
 		fs.join("C:\\", "a\\b").should.be.eql("C:\\a\\b");
 		fs.join("C:/a/b", "./../c/d").should.be.eql("C:\\a\\c\\d");
 		fs.join("C:\\a\\b", "./../c/d").should.be.eql("C:\\a\\c\\d");
+		fs.join("\\\\a\\b\\..\\c\\d\\..").should.be.eql("\\\\a\\c");
 	});
 	it("should join paths (weird cases)", function() {
 		var fs = new MemoryFileSystem();