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Original file line number | Diff line number | Diff line change |
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'use strict'; | ||
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require('../common'); | ||
const assert = require('assert'); | ||
const util = require('util'); | ||
const processUtil = process.binding('util'); | ||
const opts = {showProxy: true}; | ||
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const target = {}; | ||
const handler = { | ||
get: function() { throw new Error('Getter should not be called'); } | ||
}; | ||
const proxyObj = new Proxy(target, handler); | ||
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// Inspecting the proxy should not actually walk it's properties | ||
assert.doesNotThrow(() => util.inspect(proxyObj, opts)); | ||
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// getProxyDetails is an internal method, not intended for public use. | ||
// This is here to test that the internals are working correctly. | ||
const details = processUtil.getProxyDetails(proxyObj); | ||
assert.strictEqual(target, details[0]); | ||
assert.strictEqual(handler, details[1]); | ||
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assert.strictEqual(util.inspect(proxyObj, opts), | ||
'Proxy [ {}, { get: [Function: get] } ]'); | ||
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// Using getProxyDetails with non-proxy returns undefined | ||
assert.strictEqual(processUtil.getProxyDetails({}), undefined); | ||
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// This will throw because the showProxy option is not used | ||
// and the get function on the handler object defined above | ||
// is actually invoked. | ||
assert.throws( | ||
() => util.inspect(proxyObj) | ||
); | ||
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// Yo dawg, I heard you liked Proxy so I put a Proxy | ||
// inside your Proxy that proxies your Proxy's Proxy. | ||
const proxy1 = new Proxy({}, {}); | ||
const proxy2 = new Proxy(proxy1, {}); | ||
const proxy3 = new Proxy(proxy2, proxy1); | ||
const proxy4 = new Proxy(proxy1, proxy2); | ||
const proxy5 = new Proxy(proxy3, proxy4); | ||
const proxy6 = new Proxy(proxy5, proxy5); | ||
const expected0 = '{}'; | ||
const expected1 = 'Proxy [ {}, {} ]'; | ||
const expected2 = 'Proxy [ Proxy [ {}, {} ], {} ]'; | ||
const expected3 = 'Proxy [ Proxy [ Proxy [ {}, {} ], {} ], Proxy [ {}, {} ] ]'; | ||
const expected4 = 'Proxy [ Proxy [ {}, {} ], Proxy [ Proxy [ {}, {} ], {} ] ]'; | ||
const expected5 = 'Proxy [ Proxy [ Proxy [ Proxy [Object], {} ],' + | ||
' Proxy [ {}, {} ] ],\n Proxy [ Proxy [ {}, {} ]' + | ||
', Proxy [ Proxy [Object], {} ] ] ]'; | ||
const expected6 = 'Proxy [ Proxy [ Proxy [ Proxy [Object], Proxy [Object]' + | ||
' ],\n Proxy [ Proxy [Object], Proxy [Object] ] ],\n' + | ||
' Proxy [ Proxy [ Proxy [Object], Proxy [Object] ],\n' + | ||
' Proxy [ Proxy [Object], Proxy [Object] ] ] ]'; | ||
assert.strictEqual(util.inspect(proxy1, opts), expected1); | ||
assert.strictEqual(util.inspect(proxy2, opts), expected2); | ||
assert.strictEqual(util.inspect(proxy3, opts), expected3); | ||
assert.strictEqual(util.inspect(proxy4, opts), expected4); | ||
assert.strictEqual(util.inspect(proxy5, opts), expected5); | ||
assert.strictEqual(util.inspect(proxy6, opts), expected6); | ||
assert.strictEqual(util.inspect(proxy1), expected0); | ||
assert.strictEqual(util.inspect(proxy2), expected0); | ||
assert.strictEqual(util.inspect(proxy3), expected0); | ||
assert.strictEqual(util.inspect(proxy4), expected0); | ||
assert.strictEqual(util.inspect(proxy5), expected0); | ||
assert.strictEqual(util.inspect(proxy6), expected0); | ||
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// Just for fun, let's create a Proxy using Arrays. | ||
const proxy7 = new Proxy([], []); | ||
const expected7 = 'Proxy [ [], [] ]'; | ||
assert.strictEqual(util.inspect(proxy7, opts), expected7); | ||
assert.strictEqual(util.inspect(proxy7), '[]'); | ||
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// Now we're just getting silly, right? | ||
const proxy8 = new Proxy(Date, []); | ||
const proxy9 = new Proxy(Date, String); | ||
const expected8 = 'Proxy [ [Function: Date], [] ]'; | ||
const expected9 = 'Proxy [ [Function: Date], [Function: String] ]'; | ||
assert.strictEqual(util.inspect(proxy8, opts), expected8); | ||
assert.strictEqual(util.inspect(proxy9, opts), expected9); | ||
assert.strictEqual(util.inspect(proxy8), '[Function: Date]'); | ||
assert.strictEqual(util.inspect(proxy9), '[Function: Date]'); |