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test.js
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test.js
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import TestRunner from 'test-runner'
import { strict as a } from 'assert'
import deepMerge from '@75lb/deep-merge'
const tom = new TestRunner.Tom()
tom.test('simple', function () {
const result = deepMerge(
{ port: 8000 },
{ stack: ['one'] },
{ stack: ['two'], help: true }
)
a.deepEqual(result, {
port: 8000,
stack: ['two'],
help: true
})
})
tom.test('deep object properties', function () {
const result = deepMerge(
{ port: 8000, data: { animal: 'cow' } },
{ stack: ['one'] },
{ stack: ['two'], help: true },
{ data: { animal: 'bat', metal: 'iron' } }
)
a.deepEqual(result, {
port: 8000,
stack: ['two'],
help: true,
data: { animal: 'bat', metal: 'iron' }
})
})
tom.test('arrays: new array does not overwrite if it is empty', function () {
const stack = ['one']
const result = deepMerge(
{ stack },
{ stack: [] }
)
a.deepEqual(result, { stack: ['one'] })
a.equal(result.stack, stack)
})
tom.test('arrays 2: later array overwrites if it has items', function () {
const stack = ['one']
const result = deepMerge(
{ stack: [] },
{ stack }
)
a.deepEqual(result, { stack: ['one'] })
a.equal(result.stack, stack)
})
tom.test('arrays 3: later array overwrites if it has items', function () {
const result = deepMerge(
{ stack: ['two'] },
{ stack: ['one'] }
)
a.deepEqual(result, {
stack: ['one']
})
})
tom.test('new class instance not created', function () {
class One {
something () {}
}
const arr = [new One()]
const result = deepMerge(
{ arr },
{ arr: [] }
)
a.equal(result.arr, arr)
})
export default tom