Wrote a couple of tests. They hit actual goog api tho - so kinda slow.

package.json

@@ -16,5 +16,11 @@
     "request": ">= 2.0.2",
     "xml2js": ">= 0.1.9"
   },
-  "devDependencies": {}
+  "devDependencies": {
+    "mocha": "~1.8.1",
+    "should": "~1.2.1"
+  },
+  "scripts": {
+    "test": "mocha"
+  }
 }

test/test.js

@@ -0,0 +1,32 @@
+var assert = require("assert");
+var GoogleSpreadsheets = require("google-spreadsheets");
+require("should");
+
+describe("google-spreadsheets", function() {
+	this.timeout(0);
+	it("can load a spreadsheet", function(done) {
+		GoogleSpreadsheets({
+			key: "0ApDvWFF4RPZBdEFucnJya1hxVG9wZzhJQWZUWkpfekE"
+		}, function(err, spreadsheet) {
+			if(err) return done(err);
+			spreadsheet.title.should.equal("Example Spreadsheet");
+			spreadsheet.author.name.should.equal("sam.c.day");
+			spreadsheet.author.email.should.equal("sam.c.day@gmail.com");
+			done();
+		});
+	});
+	it("can load spreadsheet cells", function(done) {
+		GoogleSpreadsheets({
+			key: "0ApDvWFF4RPZBdEFucnJya1hxVG9wZzhJQWZUWkpfekE"
+		}, function(err, spreadsheet) {
+			if(err) return done(err);
+			spreadsheet.worksheets[0].cells({
+				range: "R1C1:R1C2"
+			}, function(err, result) {
+				result.cells[1][1].value.should.equal("Hello,");
+				result.cells[1][2].value.should.equal("World!");
+				done();
+			});
+		});
+	});
+});