08-27-周三_17-09-29

node_modules/traverse/test/keys.js

@@ -0,0 +1,33 @@
+'use strict';
+
+var test = require('tape');
+var traverse = require('../');
+
+test('sort test', function (t) {
+	var acc = [];
+	traverse({
+		a: 30,
+		b: 22,
+		id: 9,
+	}).forEach(function (node) {
+		if (!Array.isArray(node) && typeof node === 'object') {
+			this.before(function (beforeNode) {
+				this.keys = Object.keys(beforeNode);
+				this.keys.sort(function (a, b) {
+					var aA = [a === 'id' ? 0 : 1, a];
+					var bA = [b === 'id' ? 0 : 1, b];
+					return aA < bA ? -1 : aA > bA ? 1 : 0;
+				});
+			});
+		}
+		if (this.isLeaf) { acc.push(node); }
+	});
+
+	t.equal(
+		acc.join(' '),
+		'9 30 22',
+		'Traversal in a custom order'
+	);
+
+	t.end();
+});