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Copy pathindex.js
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60 lines (55 loc) · 1.81 KB
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var test = require('../util/test')(__filename);
var map = require('../../packages/object-map-keys');
var compare = require('../../packages/collection-compare');
/*
map({a: 'cow', b: 'sheep', c: 'pig'}, (value) => value);
// {cow: 'cow', sheep: 'sheep', pig: pig'}
map([4, 5, 6], (value, key) => key + 1); // {1: 4, 2: 5, 3: 6}
map({a: 3, b: 5, c: 9}, (value, key) => key + value); // {a3: 3, b5: 5, c9: 9}
map({a: 3, b: 5, c: 9}, (value, key, object) => key + object.b);
// {a5: 3, b5: 5, c5: 9}
*/
test('applies predicate using value argument', function(t) {
t.plan(2);
var obj1 = {a: 'cow', b: 'sheep', c: 'pig'};
var result1 = map(obj1, function(value) {
return value;
});
t.ok(compare(result1, {cow: 'cow', sheep: 'sheep', pig: 'pig'}));
var obj2 = {a: 3, b: 0, c: null};
var result2 = map(obj2, function(value) {
return Boolean(value);
});
t.ok(compare(result2, {true: 3, false: null}));
t.end();
});
test('applies predicate using key argument', function(t) {
t.plan(2);
var obj1 = {a: 3, b: 5, c: 9};
var result1 = map(obj1, function(value, key) {
return key + 1;
});
t.ok(compare(result1, {a1: 3, b1: 5, c1: 9}));
var obj2 = [1, 2, 3];
var result2 = map(obj2, function(value, key) {
return Number(key) + 1;
});
t.ok(compare(result2, {1: 1, 2: 2, 3: 3}));
t.end();
});
test('applies predicate using value and key arguments', function(t) {
t.plan(1);
var obj1 = {a: 3, b: 5, c: 9};
var result1 = map(obj1, function(value, key) {
return key + value;
});
t.ok(compare(result1, {a3: 3, b5: 5, c9: 9}));
});
test('applies predicate using all arguments', function(t) {
t.plan(1);
var obj1 = {a: 3, b: 5, c: 9};
var result1 = map(obj1, function(value, key, obj) {
return obj['b'] + value + key;
});
t.ok(compare(result1, {'8a': 3, '10b': 5, '14c': 9}));
});