mirror of
https://github.com/kremalicious/metamask-extension.git
synced 2024-10-23 11:46:13 +02:00
47 lines
1.8 KiB
JavaScript
47 lines
1.8 KiB
JavaScript
const assert = require('assert')
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const txStateHistoryHelper = require('../../app/scripts/lib/tx-state-history-helper')
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const testVault = require('../data/v17-long-history.json')
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describe('tx-state-history-helper', function () {
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it('migrates history to diffs and can recover original values', function () {
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testVault.data.TransactionController.transactions.forEach((tx, index) => {
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const newHistory = txStateHistoryHelper.migrateFromSnapshotsToDiffs(tx.history)
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newHistory.forEach((newEntry, index) => {
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if (index === 0) {
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assert.equal(Array.isArray(newEntry), false, 'initial history item IS NOT a json patch obj')
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} else {
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assert.equal(Array.isArray(newEntry), true, 'non-initial history entry IS a json patch obj')
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}
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const oldEntry = tx.history[index]
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const historySubset = newHistory.slice(0, index + 1)
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const reconstructedValue = txStateHistoryHelper.replayHistory(historySubset)
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assert.deepEqual(oldEntry, reconstructedValue, 'was able to reconstruct old entry from diffs')
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})
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})
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})
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it('replaying history does not mutate the original obj', function () {
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const initialState = { test: true, message: 'hello', value: 1 }
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const diff1 = [{
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"op": "replace",
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"path": "/message",
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"value": "haay",
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}]
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const diff2 = [{
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"op": "replace",
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"path": "/value",
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"value": 2,
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}]
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const history = [initialState, diff1, diff2]
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const beforeStateSnapshot = JSON.stringify(initialState)
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const latestState = txStateHistoryHelper.replayHistory(history)
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const afterStateSnapshot = JSON.stringify(initialState)
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assert.notEqual(initialState, latestState, 'initial state is not the same obj as the latest state')
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assert.equal(beforeStateSnapshot, afterStateSnapshot, 'initial state is not modified during run')
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})
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})
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