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raven-testkit

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raven-testkit

Raven test kit module to enable reports to sentry in tests without really sending the report

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Raven is a JavaScript SDK published by Sentry.io to enable software flow tracking and issues reporting to the Sentry system.
However, when building tests for your application, you want to assert that the right flow-tracking or error is being sent to Sentry, but without really sending it to the Sentry system. This way you won't swamp it with false reports during test running and other CI operations.

Raven Test Kit - to the rescue

Raven test kit enables Raven to work natively in your application, but it overrides the default Raven transport mechanism so the report is not really sent but rather logged locally. In this way, the logged reports can be fetched later for usage verification or other uses you may have in your testing environment.

Usage

Installation

npm install raven-testkit --save-dev

Instantiation

// CommonJS
const testKitInitializer = require('raven-testkit')

// ES6 Modules
import testKitInitializer from 'raven-testkit'

Using in tests

const testKit = testKitInitializer(Raven)

// any scenario that should call Raven.catchException(...)

expect(testKit.reports()).toHaveLength(1)
const report = testKit.reports()[0]
expect(report).toHaveProperty('release', 'test')
Pass your own shouldSendCallback logic
const shouldSendCallback = data => {
    return /* your own logic */
}
const testKit = testKitInitializer(Raven, shouldSendCallback)

You may see more example usage in the testing section of this repository as well.

Test Kit API

reports() : Array

Get all existing reports.

Kind: instance function Returns: Array - where each member of the array consists of Raven's data object. See: You may refer to the Sentry Docs for further explanation and details.

reset() : Array

Reset the teskit state and clear all existing reports.

Returns: Array - empty array.

extractException(report) : Object

Extract the exception object of a given report.

Returns: Object - the exception object as built by Raven

ParamTypeDescription
reportObjectreport object.

getExceptionAt(index) : Object

Extract the exception object of a report in a specific position.

Returns: Object - the exception object as built by Raven

ParamTypeDescription
indexnumberindex position of the report

findReport(error) : Object | undefined

Find a report by a given error.

Returns: Object | undefined - the report object if one found. undefined otherwise See: Uses Array.prototype.find

ParamTypeDescription
errorErrorerror to look for in the reports

isExist(error) : Boolean

check whether a given error exist (i.e. has been reported)

Returns: Boolean - true if the error exists. false otherwise

ParamTypeDescription
errorErrorthe error to look for in the reports

Gotcha(s)

  • if you set the shouldSendCallback hook in your Raven configuration, make sure to call the testKitInitializer(Raven) function after your code has finished configuring Raven. You need to do this because we call Raven.setShouldSendCallback to ensure the proper functionality of the Raven lifecycle so you need to call the testKitInitializer(Raven) only after Raven is configured.
    See the documentation above if you want to pass your own shouldSendCallback logic to raven-testkit.
  • Configure Raven to allow duplicates as otherwise the same dummy error will only be reported once. Raven.config(dummyDsn, { allowDuplicates: true }) (Documentation)

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Package last updated on 12 Oct 2018

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