joyent-portal/frontend/test/selectors/metric-by-interval-selector.js

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const flatten = require('lodash.flatten');
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const {
metricByIntervalSelector
} = require('@state/selectors');
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const data = require('./metric-by-interval-selector.json');
const moment = require('moment');
const test = require('ava');
test('should ouput the right properties', (t) => {
const stats = metricByIntervalSelector(data, {
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min: 0,
max: 100
}, {
duration: '10 minutes',
interval: '30 seconds'
});
t.truthy(stats.start);
t.truthy(stats.end);
t.deepEqual(typeof stats.start, 'number');
t.deepEqual(typeof stats.end, 'number');
t.truthy(stats.end > stats.start);
t.truthy(Array.isArray(stats.values));
t.truthy(stats.values.every((value) => [
'firstQuartile',
'median',
'thirdQuartile',
'max',
'min'
].every((key) => value[key])));
});
test('should respect order of records', (t) => {
const stats = metricByIntervalSelector(data, {
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min: 0,
max: 100
}, {
duration: '10 minutes',
interval: '30 seconds'
});
const valuesFromSource = data.map((record) => Number(record[1]));
const valuesFromStats = flatten(stats.__intervals.map((sample) => {
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return sample.values.map(r => r.v);
}));
t.deepEqual(valuesFromStats, valuesFromSource);
});
test('should respect the intervals', (t) => {
const stats = metricByIntervalSelector(data, {
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min: 0,
max: 100
}, {
duration: '10 minutes',
interval: '30 seconds'
});
t.truthy(stats.__intervals.every((sample, i, intervals) => {
const previous = i > 0
? intervals[i - 1]
: null;
const isAfterPrevious = previous
? moment(previous.end).isSame(moment(sample.start))
: true;
const interval = moment(sample.end).diff(moment(sample.start), 'seconds');
return (
(interval === 30) &&
isAfterPrevious
);
}));
});
test('should respect the intervals', (t) => {
const stats = metricByIntervalSelector(data, {
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min: 0,
max: 100
}, {
duration: '10 minutes',
interval: '30 seconds'
});
t.truthy(stats.__intervals.every((sample, i, intervals) => {
const previous = i > 0
? intervals[i - 1]
: null;
const isAfterPrevious = previous
? moment(previous.end).isSame(moment(sample.start))
: true;
const interval = moment(sample.end).diff(moment(sample.start), 'seconds');
return (
(interval === 30) &&
isAfterPrevious
);
}));
});
test('records should be within intervals', (t) => {
const stats = metricByIntervalSelector(data, {
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min: 0,
max: 100
}, {
duration: '10 minutes',
interval: '30 seconds'
});
t.truthy(stats.__intervals.every((sample) => {
return sample.values.every((record) => (
record.t.isSameOrAfter(sample.start) &&
record.t.isSameOrBefore(sample.end)
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));
}));
});
test('different data chunks should produce almost the same stats', (t) => {
const halfData = data.slice(Math.floor(data.length / 2), data.length);
const stats1 = metricByIntervalSelector(data, {
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min: 0,
max: 100
}, {
duration: '10 minutes',
interval: '30 seconds'
});
const stats2 = metricByIntervalSelector(halfData, {
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min: 0,
max: 100
}, {
duration: '10 minutes',
interval: '30 seconds'
});
const matches = stats2.values.reduceRight((matches, value, i) => {
const x = stats1.values.length - (stats2.values.length - i);
const otherValue = stats1.values[x];
const isEqual = Object.keys(value).every((k) => otherValue[k] === value[k]);
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return isEqual ? matches + 1 : matches;
}, 0);
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t.truthy(matches >= (stats2.values.length - 5));
});