Test failure to wrap method

libraries/metrics/test/unit/coffee/timeAsyncMethodTests.coffee

@@ -77,3 +77,13 @@ describe 'timeAsyncMethod', ->
 				expect(@Timer.done.callCount).to.equal 1
 				expect(@logger.log.callCount).to.equal 1
 				done()
+
+	describe 'when the wrapper cannot be applied', ->
+		beforeEach ->
+
+		it 'should raise an error', ->
+			badWrap = () =>
+				@timeAsyncMethod @testObject, 'DEFINITELY_NOT_A_REAL_METHOD', 'test.nextNumber'
+			expect(badWrap).to.throw(
+				/^.*expected object property 'DEFINITELY_NOT_A_REAL_METHOD' to be a function.*$/
+			)

libraries/metrics/test/unit/js/timeAsyncMethodTests.js

@@ -88,7 +88,7 @@
         })(this));
       });
     });
-    return describe('when a logger is supplied', function() {
+    describe('when a logger is supplied', function() {
       beforeEach(function() {
         return this.logger = {
           log: sinon.stub()
@@ -108,6 +108,18 @@
         })(this));
       });
     });
+    return describe('when the wrapper cannot be applied', function() {
+      beforeEach(function() {});
+      return it('should raise an error', function() {
+        var badWrap;
+        badWrap = (function(_this) {
+          return function() {
+            return _this.timeAsyncMethod(_this.testObject, 'DEFINITELY_NOT_A_REAL_METHOD', 'test.nextNumber');
+          };
+        })(this);
+        return expect(badWrap).to["throw"](/^.*expected object property 'DEFINITELY_NOT_A_REAL_METHOD' to be a function.*$/);
+      });
+    });
   });
 
 }).call(this);

libraries/metrics/timeAsyncMethod.coffee

@@ -3,7 +3,7 @@ module.exports = (obj, methodName, key, logger) ->
 	metrics = require('./metrics')
 
 	if typeof obj[methodName] != 'function'
-		throw new Error("[Metrics] expected object property #{methodName} to be a function")
+		throw new Error("[Metrics] expected object property '#{methodName}' to be a function")
 
 	realMethod = obj[methodName]
 	key = "methods.#{key}"