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const merge = require(`..`)
const test = require(`tape`)
test(`isMergeableObject function copying object over object`, t => {
const src = { key: { isMergeable: false }, baz: `yes` }
const target = { key: { foo: `wat` }, baz: `whatever` }
function isMergeableObject(object) {
return object && typeof value === `object` && object.isMergeable !== false
}
const res = merge(target, src, {
isMergeableObject,
})
t.deepEqual(res, { key: { isMergeable: false }, baz: `yes` })
t.equal(res.key, src.key, `Object has the same identity and was not cloned`)
t.end()
})
test(`isMergeableObject function copying object over nothing`, t => {
const src = { key: { isMergeable: false, foo: `bar` }, baz: `yes` }
const target = { baz: `whatever` }
function isMergeableObject(object) {
return object && typeof value === `object` && object.isMergeable !== false
}
const res = merge(target, src, {
isMergeableObject,
})
t.deepEqual(res, { key: { isMergeable: false, foo: `bar` }, baz: `yes` })
t.equal(res.key, src.key, `Object has the same identity and was not cloned`)
t.end()
})
test(`example from readme`, t => {
const { isPlainObject } = require(`is-plain-object`)
function SuperSpecial() {
this.special = `oh yeah man totally`
}
const instantiatedSpecialObject = new SuperSpecial()
const target = {
someProperty: {
cool: `oh for sure`,
},
}
const source = {
someProperty: instantiatedSpecialObject,
}
const defaultOutput = merge(target, source)
t.equal(defaultOutput.someProperty.cool, `oh for sure`)
t.equal(defaultOutput.someProperty.special, `oh yeah man totally`)
t.equal(defaultOutput.someProperty instanceof SuperSpecial, false)
const customMergeOutput = merge(target, source, {
isMergeableObject: isPlainObject,
})
t.equal(customMergeOutput.someProperty.cool, undefined)
t.equal(customMergeOutput.someProperty.special, `oh yeah man totally`)
t.equal(customMergeOutput.someProperty instanceof SuperSpecial, true)
t.end()
})
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