Add test of pluralization and format-num on categories list page

Author: carols10cents

app/mirage/config.js

@@ -1,5 +1,6 @@
 import summaryFixture from '../mirage/fixtures/summary';
 import searchFixture from '../mirage/fixtures/search';
+import categoriesFixture from '../mirage/fixtures/categories';
 
 export default function() {
     this.get('/summary', () => summaryFixture);
@@ -13,6 +14,8 @@ export default function() {
             };
         }
     });
+
+    this.get('/api/v1/categories', () => categoriesFixture);
 }
 
 function pageParams(request) {

app/mirage/fixtures/categories.js

@@ -0,0 +1,28 @@
+// jscs:disable validateQuoteMarks
+export default {
+    "categories": [{
+        "category": "API bindings",
+        "crates_cnt": 0,
+        "created_at": "2017-01-20T14:51:49Z",
+        "description": "Idiomatic wrappers of specific APIs for convenient access from Rust. Includes HTTP API wrappers as well. Non-idiomatic or unsafe bindings can be found in External FFI bindings.",
+        "id": "api-bindings",
+        "slug": "api-bindings"
+    }, {
+        "category": "Algorithms",
+        "crates_cnt": 1,
+        "created_at": "2017-01-20T14:51:49Z",
+        "description": "Rust implementations of core algorithms such as hashing, sorting, searching, and more.",
+        "id": "algorithms",
+        "slug": "algorithms"
+    }, {
+        "category": "Asynchronous",
+        "crates_cnt": 3910,
+        "created_at": "2017-01-20T14:51:49Z",
+        "description": "Crates to help you deal with events independently of the main program flow, using techniques like futures, promises, waiting, or eventing.",
+        "id": "asynchronous",
+        "slug": "asynchronous"
+    }],
+    "meta": {
+        "total": 3
+    }
+};

tests/acceptance/categories-test.js

@@ -0,0 +1,16 @@
+import { test } from 'qunit';
+import moduleForAcceptance from 'cargo/tests/helpers/module-for-acceptance';
+
+moduleForAcceptance('Acceptance | categories');
+
+test('listing categories', function(assert) {
+    visit('/categories');
+
+    andThen(function() {
+        hasText(assert, '.row:eq(0) .desc .info span', '0 crates');
+
+        hasText(assert, '.row:eq(1) .desc .info span', '1 crate');
+
+        hasText(assert, '.row:eq(2) .desc .info span', '3,910 crates');
+    });
+});