initial tests

common/script/preenUserHistory.js

@@ -8,7 +8,6 @@ function _aggregate (history, aggregateBy) {
       return moment(entry.date).format(aggregateBy);
     })
     .sortBy((entry, key) => key) // sort by date
-    .reverse() // sort from most to least recent
     .map(entries => {
       return {
         date: Number(entries[0].date),
@@ -40,17 +39,19 @@ export function preenHistory (history, isSubscribed, timezoneOffset) {
 
   // Keep uncompressed entries (modifies history)
   let newHistory = _.remove(history, entry => {
-    return moment(entry.date).isSameOrAfter(cutOff);
+    let date = moment(entry.date);
+    return date.isSame(cutOff) || date.isAfter(cutOff);
   });
 
   // Date after which to begin compressing data by year
   let monthsCutOff = cutOff.subtract(isSubscribed ? 12 : 10, 'months').startOf('day');
   let aggregateByMonth = _.remove(history, entry => {
-    return moment(entry.date).isSameOrAfter(monthsCutOff);
+    let date = moment(entry.date);
+    return date.isSame(monthsCutOff) || date.isAfter(monthsCutOff);
   });
   // Aggregate remaining entries by month and year
-  newHistory.push(..._aggregate(aggregateByMonth, 'YYYYMM'));
+  newHistory.unshift(..._aggregate(aggregateByMonth, 'YYYYMM'));
-  newHistory.push(..._aggregate(history, 'YYYY'));
+  newHistory.unshift(..._aggregate(history, 'YYYY'));
 
   return newHistory;
 }

test/common/preenHistory.test.js

@@ -0,0 +1,58 @@
+import { preenHistory } from '../../common/script/preenUserHistory';
+import moment from 'moment';
+import _ from 'lodash';
+import sinon from 'sinon';
+function generateHistory (days) {
+  let history = [];
+  let now = Number(moment().toDate());
+
+  while (days > 0) {
+    history.push({
+      value: days,
+      date: Number(moment(now).subtract(days, 'days').toDate()),
+    });
+    days--;
+  }
+
+  return history;
+}
+
+describe('preenHistory', function () {
+  let history;
+
+  beforeEach(function beforeEach () {
+    // Replace system clocks so we can get predictable results
+    this.clock = sinon.useFakeTimers(Number(moment('2013-10-20').zone(0).startOf('day').toDate()), 'Date');
+  });
+  afterEach(function afterEach () {
+    return this.clock.restore();
+  });
+
+  it('does not modify history if all entries are more recent than cutoff (free users)', () => {
+    let h = generateHistory(60);
+    expect(preenHistory(_.cloneDeep(h))).to.eql(h);
+  });
+
+  it('does not modify history if all entries are more recent than cutoff (subscribers)', () => {
+    let h = generateHistory(365);
+    expect(preenHistory(_.cloneDeep(h), true)).to.eql(h);
+  });
+
+  it('does aggregate data in monthly entries before cutoff (free users)', () => {
+    let h = generateHistory(81); // Jumps to July
+    let preened = preenHistory(_.cloneDeep(h));
+    expect(preened.length).to.eql(62); // Keeps 60 days + 2 entries per august and july
+  });
+
+  it('does aggregate data in monthly entries before cutoff (subscribers)', () => {
+    let h = generateHistory(386); // Jumps to July
+    let preened = preenHistory(_.cloneDeep(h), true);
+    expect(preened.length).to.eql(367); // Keeps 367 days + 2 entries per august and july
+  });
+
+  it('does aggregate data in monthly and yearly entries before cutoff (free users)', () => {
+    let h = generateHistory(364); // Jumps to October 21 2012
+    let preened = preenHistory(_.cloneDeep(h));
+    expect(preened.length).to.eql(71); // Keeps 60 days + 10 montly entries and 1 yearly entry for Oct 21 - Oct 31 2012
+  });
+});

test/common/preenUserHistory.test.js

@@ -1,11 +0,0 @@
-import preenUserHistory from '../../common/script/preenUserHistory';
-
-describe('preenUserHistory', () => {
-  describe('preen tasks history', () => {
-    it('works');
-  });
-
-  describe('preen user history', () => {
-    it('works');
-  });
-});