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|
import test from 'ava';
import mapObject from '.';
test('main', t => {
t.is(mapObject({foo: 'bar'}, key => [key, 'unicorn']).foo, 'unicorn');
t.is(mapObject({foo: 'bar'}, (key, value) => ['unicorn', value]).unicorn, 'bar');
t.is(mapObject({foo: 'bar'}, (key, value) => [value, key]).bar, 'foo');
});
test('target option', t => {
const target = {};
t.is(mapObject({foo: 'bar'}, (key, value) => [value, key], {target}), target);
t.is(target.bar, 'foo');
});
test('deep option', t => {
const object = {
one: 1,
object: {
two: 2,
three: 3
},
array: [
{
four: 4
},
5
]
};
const expected = {
one: 2,
object: {
two: 4,
three: 6
},
array: [
{
four: 8
},
5
]
};
const mapper = (key, value) => [key, typeof value === 'number' ? value * 2 : value];
const actual = mapObject(object, mapper, {deep: true});
t.deepEqual(actual, expected);
});
test('shouldRecurse mapper option', t => {
const object = {
one: 1,
object: {
two: 2,
three: 3
},
array: [
{
four: 4
},
5
]
};
const expected = {
one: 2,
object: {
two: 2,
three: 3
},
array: [
{
four: 8
},
5
]
};
const mapper = (key, value) => {
if (key === 'object') {
return [key, value, {shouldRecurse: false}];
}
return [key, typeof value === 'number' ? value * 2 : value];
};
const actual = mapObject(object, mapper, {deep: true});
t.deepEqual(actual, expected);
});
test('nested arrays', t => {
const object = {
array: [
[
0,
1,
2,
{
a: 3
}
]
]
};
const expected = {
array: [
[
0,
1,
2,
{
a: 6
}
]
]
};
const mapper = (key, value) => [key, typeof value === 'number' ? value * 2 : value];
const actual = mapObject(object, mapper, {deep: true});
t.deepEqual(actual, expected);
});
test('handles circular references', t => {
const object = {
one: 1,
array: [
2
]
};
object.circular = object;
object.array2 = object.array;
object.array.push(object);
const mapper = (key, value) => [key.toUpperCase(), value];
const actual = mapObject(object, mapper, {deep: true});
const expected = {
ONE: 1,
ARRAY: [
2
]
};
expected.CIRCULAR = expected;
expected.ARRAY2 = expected.ARRAY;
expected.ARRAY.push(expected);
t.deepEqual(actual, expected);
});
test('validates input', t => {
t.throws(() => {
mapObject(1, () => {});
}, TypeError);
});
test('__proto__ keys are safely dropped', t => {
const input = {['__proto__']: {one: 1}};
const output = mapObject(input, (key, value) => [key, value]);
t.deepEqual(output, {});
// AVA's equality checking isn't quite strict enough to catch the difference
// between plain objects as prototypes and Object.prototype, so we also check
// the prototype by identity
t.is(Object.getPrototypeOf(output), Object.prototype);
});
test('remove keys (#36)', t => {
const object = {
one: 1,
two: 2
};
const expected = {
one: 1
};
const mapper = (key, value) => value === 1 ? [key, value] : mapObject.mapObjectSkip;
const actual = mapObject(object, mapper, {deep: true});
t.deepEqual(actual, expected);
});
|
