first few Util tests

frontend/src/Metamaps/Util.js

@@ -22,11 +22,10 @@ const Util = {
     return b + s
   },
 
-  nowDateFormatted: function () {
-    var date = new Date(Date.now())
-    var month = (date.getMonth() + 1) < 10 ? '0' + (date.getMonth() + 1) : (date.getMonth() + 1)
-    var day = date.getDate() < 10 ? '0' + date.getDate() : date.getDate()
-    var year = date.getFullYear()
+  nowDateFormatted: function (date = new Date(Date.now())) {
+    const month = (date.getMonth() + 1) < 10 ? '0' + (date.getMonth() + 1) : (date.getMonth() + 1)
+    const day = date.getDate() < 10 ? '0' + date.getDate() : date.getDate()
+    const year = date.getFullYear()
 
     return month + '/' + day + '/' + year
   },

frontend/test/Metamaps.Util.spec.js

@@ -0,0 +1,45 @@
+/* global describe, it */
+
+import chai from 'chai'
+
+import Util from '../src/Metamaps/Util'
+
+const { expect } = chai
+
+describe('Metamaps.Util.js', function () {
+  describe('splitLine', function() {
+    it('splits on words', function() {
+      expect(Util.splitLine('test test test', 10))
+        .to.equal('test test\ntest')
+    })
+    // TODO this test seems like it's incorrect behaviour
+    it('splits mid-word if need be', function() {
+      expect(Util.splitLine('test test', 2))
+        .to.equal("te\nt\nte\nt")
+    })
+    it('splits words over 30 chars', function() {
+      expect(Util.splitLine('suprainterpostantidisestablishmentarianism', 30))
+        .to.equal("suprainterpostantidisestablish\nentarianism")
+    })
+  })
+  describe('nowDateFormatted', function() {
+    // TODO need `Date`
+  })
+  describe('decodeEntities', function() {
+    // TODO need `document`
+  })
+  describe('getDistance', function() {
+    it('(0,0) -> (0,0) = 0', function() {
+      expect(Util.getDistance({ x: 0, y: 0 }, { x: 0, y: 0 }))
+        .to.equal(0)
+    })
+    it('(-5,0) -> (5,0) = 10', function() {
+      expect(Util.getDistance({ x: -5, y: 0 }, { x: 5, y: 0 }))
+        .to.equal(10)
+    })
+    it('(0,0) -> (5,7) = 8.6023', function() {
+      expect(Util.getDistance({ x: 0, y: 0 }, { x: 5, y: 7 }).toFixed(4))
+        .to.equal('8.6023')
+    })
+  })
+})