Add vulcanize to tools.

tools/vulcanize/node_modules/vulcanize/node_modules/cheerio/node_modules/cheerio-select/node_modules/CSSselect/test/api.js

Index: tools/vulcanize/node_modules/vulcanize/node_modules/cheerio/node_modules/cheerio-select/node_modules/CSSselect/test/api.js
diff --git a/tools/vulcanize/node_modules/vulcanize/node_modules/cheerio/node_modules/cheerio-select/node_modules/CSSselect/test/api.js b/tools/vulcanize/node_modules/vulcanize/node_modules/cheerio/node_modules/cheerio-select/node_modules/CSSselect/test/api.js
new file mode 100644
index 0000000000000000000000000000000000000000..5dddc2d13e96fef2006e1252d07007087fcd04b2
--- /dev/null
+++ b/tools/vulcanize/node_modules/vulcanize/node_modules/cheerio/node_modules/cheerio-select/node_modules/CSSselect/test/api.js
@@ -0,0 +1,31 @@
+var CSSselect = require(".."),
+    htmlparser = require("htmlparser2"),
+    assert = require("assert");
+
+function makeDom(markup) {
+	var handler = new htmlparser.DomHandler(),
+		parser = new htmlparser.Parser(handler);
+	parser.write(markup);
+	parser.done();
+	return handler.dom;
+}
+
+describe("API", function() {
+	describe("removes duplicates", function() {
+		it("between identical trees", function() {
+			var dom = makeDom("<div></div>")[0];
+			var matches = CSSselect("div", [dom, dom]);
+			assert.equal(matches.length, 1, "Removes duplicate matches");
+		});
+		it("between a superset and subset", function() {
+			var dom = makeDom("<div><p></p></div>")[0];
+			var matches = CSSselect("p", [dom, dom.children[0]]);
+			assert.equal(matches.length, 1, "Removes duplicate matches");
+		});
+		it("betweeen a subset and superset", function() {
+			var dom = makeDom("<div><p></p></div>")[0];
+			var matches = CSSselect("p", [dom.children[0], dom]);
+			assert.equal(matches.length, 1, "Removes duplicate matches");
+		});
+	});
+});