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Merge pull request #74 from vzDevelopment/vz/unit-tests
Add unit tests to Fn UI
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,120 @@ | ||
| const logger = require('config-logger'); | ||
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| const LabelParser = require('./label-parser.js'); | ||
| const StatsParser = require('./stats-parser.js'); | ||
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| /** | ||
| * This class is used to parse app specific stats from the Fn server's metrics | ||
| * API. | ||
| */ | ||
| module.exports = class AppStatsParser extends StatsParser { | ||
| constructor() { | ||
| super(); | ||
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| this._metricNames = { | ||
| 'fn_container_start_total': 'Starting', | ||
| 'fn_container_busy_total': 'Busy', | ||
| 'fn_container_idle_total': 'Idling', | ||
| 'fn_container_paused_total': 'Paused', | ||
| 'fn_container_wait_total': 'Waiting', | ||
| }; | ||
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| var metricNameRE = '(' + Object.keys(this._metricNames).join('|') + ')'; | ||
|
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| // Match fn container info e.g. {app_id="01D8JQSKDENG8G00GZJ000000B"} | ||
| var fnDataRE = '{' + '[^}]+' + '}'; | ||
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| // unfortunately we cannot use ((?:, labelRE)+) as it won't capture the | ||
| // middle key-value pair | ||
| var metricsRE = '^' + metricNameRE + '(' + fnDataRE + ')' + this._spacesRE + this._valueRE; | ||
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| this._regex = RegExp(metricsRE, 'gm'); | ||
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| //regexMatch[0] = the whole match | ||
| //regexMatch[1] = metric name (e.g. fn_container_busy_total) | ||
| //regexMatch[2] = fn data in javascript object notation (e.g. {app_id="01D7"}) | ||
| //regexMatch[3] = metric value (integer) | ||
| this._WHOLE_MATCH = 0; | ||
| this._METRIC_NAME = 1; | ||
| this._FN_DATA = 2; | ||
| this._METRIC_VALUE = 3; | ||
| } | ||
|
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| /* | ||
| * Parse the stats data and return an object containing the app specific | ||
| * stats. | ||
| * | ||
| * Example data structure for object being returned: | ||
| * 01D8JQSKDENG8G00GZJ000000B | ||
| * Functions | ||
| * 01D8JQSQ2VNG8G00GZJ000000C | ||
| * Busy: 1 | ||
| * Idling: 0 | ||
| * Paused: 0 | ||
| * Starting: 0 | ||
| * Waiting: 0 | ||
| * 01D8JQSQ2VNG8G00GZJ000000D | ||
| * Busy: 0 | ||
| * Idling: 0 | ||
| * Paused: 0 | ||
| * Starting: 0 | ||
| * Waiting: 1 | ||
| * | ||
| * @param {String} data the data to parse. | ||
| * | ||
| * @return {Object} an object representing the parsed data as per the | ||
| * documentation above. | ||
| */ | ||
| parse(data) { | ||
| var jsonData = {}; | ||
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| var labelParser = new LabelParser(); | ||
| var metricData; | ||
| while((metricData = this._regex.exec(data)) !== null) { | ||
| logger.debug("Processing App Stat: " + metricData[0]); | ||
|
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| var metricsName = metricData[this._METRIC_NAME]; | ||
| var metricsHumanName = this._metricNames[metricsName]; | ||
| var metricsValue = parseInt(metricData[this._METRIC_VALUE]); | ||
|
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| var rawFnData = metricData[this._FN_DATA]; | ||
| var fnData = labelParser.parse(rawFnData); | ||
|
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| jsonData = this._addData(jsonData, fnData.app_id, fnData.fn_id, | ||
| metricsHumanName, metricsValue | ||
| ); | ||
| } | ||
|
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| return jsonData; | ||
| } | ||
|
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| /** | ||
| * Adds App Data to the object that we're going to return. | ||
| * | ||
| * @param {Object} data the object to append the data to. | ||
| * @param {String} appId the ID of the Fn App which this data belongs to. | ||
| * @param {String} fnId the ID of the Fn function which this data belongs to. | ||
| * @param {String} metricsHumanName the human readable name of the metric being recorded. | ||
| * @param {Int} metricsValue the value of the metric that was parsed. | ||
| * | ||
| * @return {Object} the data object with the app data added. | ||
| */ | ||
| _addData(data, appId, fnId, metricsHumanName, metricsValue) { | ||
| if(data[appId] === undefined) { | ||
| data[appId] = {'Functions': {}}; | ||
| } | ||
|
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| if(data[appId].Functions[fnId] === undefined) { | ||
| data[appId].Functions[fnId] = {}; | ||
| } | ||
|
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| // Aggregate data for all fn images | ||
| if(metricsHumanName in data[appId].Functions[fnId]) { | ||
| data[appId].Functions[fnId][metricsHumanName] += metricsValue; | ||
| } else { | ||
| data[appId].Functions[fnId][metricsHumanName] = metricsValue; | ||
| } | ||
|
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| return data; | ||
| } | ||
| }; |
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