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test: mock os.#networkInterfaces #305

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test: mock os.#networkInterfaces #305

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28 changes: 26 additions & 2 deletions source/test.ts
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Expand Up @@ -3,18 +3,34 @@ import kava from 'kava'
import { equal } from 'assert-helpers'
import getMAC, { isMAC } from './index.js'

function mockNetworkInterfaces(mac: string) {
const os = require('os')
const actual = os.networkInterfaces
os.networkInterfaces = function () {
return {
en0: [
{
mac,
},
],
}
}
const restore = () => (os.networkInterfaces = actual)
return restore
}

// Test
kava.suite('getMAC', function (suite, test) {
suite('validation', function (suite, test) {
test('validates dashed mac correctly', function () {
test('validates coloned mac correctly', function () {
equal(isMAC('e4:ce:8f:5b:a7:fe'), true)
})

test('validated capital mac correctly', function () {
equal(isMAC('00:28:31:8A:41:C6'), true)
})

test('validates coloned mac correctly', function () {
test('validates dashed mac correctly', function () {
equal(isMAC('e4-ce-8f-5b-a7-fe'), true)
})

Expand Down Expand Up @@ -45,4 +61,12 @@ kava.suite('getMAC', function (suite, test) {
equal(typeof macAddress, 'string', `${macAddress} is string`)
equal(isMAC(macAddress), true, `${macAddress} is mac address`)
})

test('returns mac', function () {
const mockedMacAddress = '01-23-45-67-89-AB-CD-EF'
const restore = mockNetworkInterfaces(mockedMacAddress)
const macAddress = getMAC()
equal(macAddress, mockedMacAddress)
restore()
})
})