npm: Fixed test script (#1809)

This solves the problem that is wasn't possible to pass arguments to `tests/run.js`.

package.json

@@ -5,7 +5,10 @@
   "main": "prism.js",
   "style": "themes/prism.css",
   "scripts": {
-    "test": "mocha tests/testrunner-tests.js && mocha tests/run.js && mocha tests/plugins/**/*.js"
+    "test:runner": "mocha tests/testrunner-tests.js",
+    "test:languages": "mocha tests/run.js",
+    "test:plugins": "mocha tests/plugins/**/*.js",
+    "test": "npm run test:runner && npm run test:languages && npm run test:plugins"
   },
   "repository": {
     "type": "git",

test-suite.html

@@ -30,8 +30,8 @@ <h1>Running the test suite</h1>
 	<section id="running-tests-for-specific-languages">
 		<h2>Running tests for specific languages</h2>
 
-		<p>To run the tests only for one language, you can use the <code>language</code> parameter: <code class="language-bash">npm test -- --language=markup</code>.</p>
-		<p>You can even specify multiple languages: <code class="language-bash">npm test -- --language=markup --language=css</code>.</p>
+		<p>To run the tests only for one language, you can use the <code>language</code> parameter: <code class="language-bash">npm run test:languages -- --language=markup</code>.</p>
+		<p>You can even specify multiple languages: <code class="language-bash">npm run test:languages -- --language=markup --language=css</code>.</p>
 	</section>
 </section>
 
@@ -121,7 +121,7 @@ <h2>Explaining the simplified token stream</h2>
 			<li>All empty structures are removed.</li>
 		</ul>
 		<p>To get a pretty-printed version of the simplified token stream of a failed test, add the <code>--pretty</code> modifier. Keep in mind that the pretty-printed token stream is indented using spaces, you may need to convert these to tabs. (Most editors today have an option which handles the conversion for you.)<br>
-			E.g. <code class="language-bash">npm test -- --pretty</code>.</p>
+			E.g. <code class="language-bash">npm run test:languages -- --pretty</code>.</p>
 		<p>For further information: reading the tests of the test runner (<code>tests/testrunner-tests.js</code>) will help you understand the transformation.</p>
 	</section>
 </section>