08-27-周三_17-09-29

node_modules/traverse/test/subexpr.js

@@ -0,0 +1,41 @@
+'use strict';
+
+var traverse = require('../');
+var test = require('tape');
+
+test('subexpr', function (t) {
+	var obj = ['a', 4, 'b', 5, 'c', 6];
+	var r = traverse(obj).map(function (x) {
+		if (typeof x === 'number') {
+			this.update([x - 0.1, x, x + 0.1], true);
+		}
+	});
+
+	t.same(obj, ['a', 4, 'b', 5, 'c', 6]);
+	t.same(r, [
+		'a', [3.9, 4, 4.1],
+		'b', [4.9, 5, 5.1],
+		'c', [5.9, 6, 6.1],
+	]);
+	t.end();
+});
+
+test('block', function (t) {
+	var obj = [[1], [2], [3]];
+	var r = traverse(obj).map(function (x) {
+		if (Array.isArray(x) && !this.isRoot) {
+			if (x[0] === 5) {
+				this.block();
+			} else {
+				this.update([[x[0] + 1]]);
+			}
+		}
+	});
+
+	t.same(r, [
+		[[[[[5]]]]],
+		[[[[5]]]],
+		[[[5]]],
+	]);
+	t.end();
+});