Updated make test, the readme, and the contribution guide

CONTRIBUTING.md

@@ -10,7 +10,7 @@ Once you're ready, open a [pull request](https://github.com/hound-search/hound/c
 your changes (you can read more about pull requests on GitHub [here](http://help.github.com/pull-requests/)).
 
 When you send a pull request, please be sure to include: 
-- unit tests that validate that your changes work as expected
+- unit tests that validate that your changes work as expected (both for Go and for JavaScript changes)
 - consice code comments (it can help to imagine that you're explaining your code to a total stranger)
 - an examples, if necessary.
 

Makefile

@@ -33,6 +33,7 @@ dev: ALL
 
 test:
 	go test github.com/hound-search/hound/...
+	npm test
 
 clean:
 	rm -rf .build node_modules

README.md

@@ -117,11 +117,19 @@ GOPATH=$(pwd) make -C src/github.com/hound-search/hound
 ### Testing
 
 There are an increasing number of tests in each of the packages in Hound. Please make sure these pass before uploading your Pull Request. You can run the tests with the following command.
+To run the entire test suite, use:
 
 ```
 make test
 ```
 
+If you want to just run the JavaScript test suite, use:
+```
+npm test
+```
+
+Any Go files that end in `_test.go` are assumed to be test files.  Similarly, any JavaScript files that ends in `.test.js` are automatically run by Jest, our test runner. Tests should live next to the files that they cover. [Check out Jest's docs](https://jestjs.io/docs/en/getting-started) for more details on writing Jest tests, and [check out Go's testing docs](https://golang.org/pkg/testing/) for more details on testing Go code.
+
 ### Working on the web UI
 
 Hound includes a web UI that is composed of several files (html, css, javascript, etc.). To make sure hound works seamlessly with the standard Go tools, these resources are all bundled inside of the `houndd` binary. Note that changes to the UI will result in local changes to the `ui/bindata.go` file. You must include these changes in your Pull Request.