add sanity tests for metrics

lib/client-metrics/client-metrics.test.js

@@ -2,6 +2,7 @@
 
 const { test } = require('ava');
 const UnleashClientMetrics = require('./index');
+const moment = require('moment');
 const sinon = require('sinon');
 
 const { EventEmitter } = require('events');
@@ -170,3 +171,158 @@ test('should handle a lot of toggles', t => {
     t.truthy(seenToggles.length === 100);
     metrics.destroy();
 });
+
+test('should have correct values for lastMinute', t => {
+    const clock = sinon.useFakeTimers();
+
+    const store = new EventEmitter();
+    const metrics = new UnleashClientMetrics(store);
+
+    const now = new Date();
+    const input = [
+        {
+            start: moment(now).subtract(1, 'hour'),
+            stop: moment(now).subtract(59, 'minutes'),
+            toggles: {
+                toggle: { yes: 10, no: 10 },
+            },
+        },
+        {
+            start: moment(now).subtract(30, 'minutes'),
+            stop: moment(now).subtract(29, 'minutes'),
+            toggles: {
+                toggle: { yes: 10, no: 10 },
+            },
+        },
+        {
+            start: moment(now).subtract(2, 'minutes'),
+            stop: moment(now).subtract(1, 'minutes'),
+            toggles: {
+                toggle: { yes: 10, no: 10 },
+            },
+        },
+        {
+            start: moment(now).subtract(2, 'minutes'),
+            stop: moment(now).subtract(59, 'seconds'),
+            toggles: {
+                toggle: { yes: 10, no: 10 },
+            },
+        },
+        {
+            start: moment(now),
+            stop: moment(now).subtract(30, 'seconds'),
+            toggles: {
+                toggle: { yes: 10, no: 10 },
+            },
+        },
+    ];
+
+    input.forEach(bucket => {
+        store.emit('metrics', {
+            appName,
+            instanceId,
+            bucket,
+        });
+    });
+
+    const seenToggles = metrics.getSeenTogglesByAppName(appName);
+    t.truthy(seenToggles.length === 1);
+
+    // metrics.se
+    let c = metrics.getTogglesMetrics();
+    t.deepEqual(c.lastMinute.toggle, { yes: 20, no: 20 });
+
+    clock.tick(10 * 1000);
+    c = metrics.getTogglesMetrics();
+    t.deepEqual(c.lastMinute.toggle, { yes: 10, no: 10 });
+
+    clock.tick(20 * 1000);
+    c = metrics.getTogglesMetrics();
+    t.deepEqual(c.lastMinute.toggle, { yes: 0, no: 0 });
+
+    metrics.destroy();
+    clock.restore();
+});
+
+
+test('should have correct values for lastHour', t => {
+    const clock = sinon.useFakeTimers();
+
+    const store = new EventEmitter();
+    const metrics = new UnleashClientMetrics(store);
+
+    const now = new Date();
+    const input = [
+        {
+            start: moment(now).subtract(1, 'hour'),
+            stop: moment(now).subtract(59, 'minutes'),
+            toggles: {
+                toggle: { yes: 10, no: 10 },
+            },
+        },
+        {
+            start: moment(now).subtract(30, 'minutes'),
+            stop: moment(now).subtract(29, 'minutes'),
+            toggles: {
+                toggle: { yes: 10, no: 10 },
+            },
+        },
+        {
+            start: moment(now).subtract(15, 'minutes'),
+            stop: moment(now).subtract(14, 'minutes'),
+            toggles: {
+                toggle: { yes: 10, no: 10 },
+            },
+        },
+        {
+            start: moment(now).add(59, 'minutes'),
+            stop: moment(now).add(1, 'hour'),
+            toggles: {
+                toggle: { yes: 11, no: 11 },
+            },
+        },
+    ];
+
+    input.forEach(bucket => {
+        store.emit('metrics', {
+            appName,
+            instanceId,
+            bucket,
+        });
+    });
+
+    const seenToggles = metrics.getSeenTogglesByAppName(appName);
+
+    t.truthy(seenToggles.length === 1);
+
+    // metrics.se
+    let c = metrics.getTogglesMetrics();
+    t.deepEqual(c.lastHour.toggle, { yes: 41, no: 41 });
+
+    clock.tick(10 * 1000);
+    c = metrics.getTogglesMetrics();
+    t.deepEqual(c.lastHour.toggle, { yes: 41, no: 41 });
+
+    // at 30
+    clock.tick(30 * 60 * 1000);
+    c = metrics.getTogglesMetrics();
+    t.deepEqual(c.lastHour.toggle, { yes: 31, no: 31 });
+
+    // at 45
+    clock.tick(15 * 60 * 1000);
+    c = metrics.getTogglesMetrics();
+    t.deepEqual(c.lastHour.toggle, { yes: 21, no: 21 });
+
+    // at 1:15
+    clock.tick(30 * 60 * 1000);
+    c = metrics.getTogglesMetrics();
+    t.deepEqual(c.lastHour.toggle, { yes: 11, no: 11 });
+
+    // at 2:00
+    clock.tick(45 * 60 * 1000);
+    c = metrics.getTogglesMetrics();
+    t.deepEqual(c.lastHour.toggle, { yes: 0, no: 0 });
+
+    metrics.destroy();
+    clock.restore();
+});