port coarse UA parser tests to vows

tests/coarse-user-agent-parser-test.js

@@ -8,6 +8,7 @@ const fs = require('fs'),
       // TODO: convert to vows based test (or introduce nodeunit dependency)
       vows = require('vows'),
       coarse = require('../lib/coarse_user_agent_parser'),
+      assert = require('assert'),
       path = require('path');
 
 var suite = vows.describe('coarse-user-agent-parser');
@@ -17,26 +18,33 @@ suite.options.error = false;
 
 /* Update test data with https://gist.github.com/2590547 */
 
-fs.readFile(path.join(__dirname, 'data/user_agents.json'), 'utf-8', function (err, data) {
-  if (err) {
-    console.error(err);
-  } else {
-    var test_data = JSON.parse(data);
-    for (var i=0; i < test_data.tests.length; i++) {
-      var t = test_data.tests[i];
-      if (t.ua) {
-        var actual = coarse.parse(t.ua);
-        if (actual.os != t.os) {
-          console.error('Error parsing ' + t.ua + ' expected [' + t.os + '] got [' + actual.os + ']');
-        }
-        if (actual.browser != t.browser) {
-          console.error('Error parsing ' + t.ua + ' expected [' + t.browser + '] got [' + actual.browser + ']');
-        }
-        if (actual.version != t.version) {
-          console.error('Error parsing ' + t.ua + ' expected [' + t.version + '] got [' + actual.version + ']');
+suite.addBatch({
+  "UA parsing": {
+    topic: function() {
+      fs.readFile(path.join(__dirname, 'data/user_agents.json'), 'utf-8', this.callback);
+    },
+    "data can be read": function(err, data) {
+      assert.isNull(err);
+    },
+    "with lots of data": {
+      topic: function(err, data) {
+        this.callback(JSON.parse(data));
+      },
+      "demonstrates proper functioning of coarse parser": function(test_data) {
+        for (var i=0; i < test_data.tests.length; i++) {
+          var t = test_data.tests[i];
+          if (t.ua) {
+            var actual = coarse.parse(t.ua);
+            assert.strictEqual(t.os, actual.os, t.ua);
+            assert.strictEqual(t.browser, actual.browser, t.ua);
+            assert.strictEqual(t.version, actual.version, t.ua);
+          }
         }
       }
     }
-    console.log('Finished ' + test_data.tests.length);
   }
-});
\ No newline at end of file
+});
+
+// run or export the suite.
+if (process.argv[1] === __filename) suite.run();
+else suite.export(module);