test: add sanity checks for .name, .version and .platform (#6)

package.json

@@ -3,7 +3,7 @@
   "version": "0.0.1",
   "description": "Reusable list of browsers to test against when using Airtap",
   "scripts": {
-    "test": "standard"
+    "test": "standard && node test.js"
   },
   "repository": "airtap/browsers",
   "keywords": [
@@ -19,6 +19,7 @@
   },
   "homepage": "https://github.com/airtap/browsers",
   "devDependencies": {
-    "standard": "~10.0.3"
+    "standard": "~10.0.3",
+    "tape": "^4.8.0"
   }
 }

test.js

@@ -0,0 +1,21 @@
+const test = require('tape')
+const browsers = require('.')
+
+test('check .name, .version and .platform', t => {
+  t.equal(Array.isArray(browsers.all), true, '.all is an array')
+  t.equal(Array.isArray(browsers.pullRequest), true, '.pullRequest is an array')
+
+  function predicate (el) {
+    // .name required
+    if (typeof el.name !== 'string') return false
+    // .platform optional, should be string if set
+    if (el.platform && typeof el.platform !== 'string') return false
+    // .version required
+    return typeof el.version === 'string' || Array.isArray(el.version)
+  }
+
+  t.equal(browsers.all.every(predicate), true)
+  t.equal(browsers.pullRequest.every(predicate), true)
+
+  t.end()
+})