Test that we pass undefined to callbacks

Resolves #17

Author: strugee

test/lib/backend-test.js

@@ -34,6 +34,9 @@ module.exports = function(options) {
 				'it works': function(err) {
 					assert.ifError(err);
 				},
+				'we get passed `undefined`': function(err, ret) {
+					assert.isUndefined(ret);
+				},
 				'the directory exists': function() {
 					// Evil sync thing
 					assert.doesNotThrow(function() {
@@ -66,6 +69,9 @@ module.exports = function(options) {
 						'it works': function(err) {
 							assert.ifError(err);
 						},
+						'we get passed `undefined`': function(err, ret) {
+							assert.isUndefined(ret);
+						},
 						'the test/ directory exists again': function() {
 							// Evil sync thing
 							assert.doesNotThrow(function() {

test/lib/branch-test.js

@@ -31,6 +31,9 @@ module.exports = function(options) {
 				'it works': function(err) {
 					assert.ifError(err);
 				},
+				'we get passed `undefined`': function(err, ret) {
+					assert.isUndefined(ret);
+				},
 				'the directory exists': function() {
 					// Evil sync thing
 					assert.doesNotThrow(function() {