surma
d44f1d9677
Checkpoint before integration and package validation. Assisted-by: SurmAgent:unknown [read] [edit] [bash]
54 lines
1.9 KiB
JavaScript
54 lines
1.9 KiB
JavaScript
import { assert, assertThrows } from "./assert.js";
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/* The ownKeys trap result is fed to CreateListFromArrayLike(), which throws
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a TypeError when the result is not an object. */
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const primitives = [0, 1, -1, NaN, "", "ab", true, false, undefined, null, 1n,
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Symbol("s")];
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for (const v of primitives) {
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const p = new Proxy({}, { ownKeys() { return v; } });
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assertThrows(TypeError, function() { Reflect.ownKeys(p); });
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assertThrows(TypeError, function() { Object.keys(p); });
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assertThrows(TypeError, function() { Object.getOwnPropertyNames(p); });
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assertThrows(TypeError, function() { Object.getOwnPropertySymbols(p); });
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assertThrows(TypeError, function() { Object.assign({}, p); });
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assertThrows(TypeError, function() { ({...p}); });
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assertThrows(TypeError, function() { JSON.stringify(p); });
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assertThrows(TypeError, function() { for (const k in p) ; });
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}
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{
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const p = new Proxy({}, { ownKeys() { return "ab"; } });
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assertThrows(TypeError, function() { Reflect.ownKeys(p); });
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}
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{
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assert(Reflect.ownKeys(new Proxy({}, { ownKeys: () => [] })).length, 0);
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const a = Reflect.ownKeys(new Proxy({}, { ownKeys: () => ["a", "b"] }));
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assert(a.length, 2);
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assert(a[0], "a");
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assert(a[1], "b");
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const b = Reflect.ownKeys(new Proxy({}, {
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ownKeys: () => ({length: 2, 0: "x", 1: "y"}),
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}));
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assert(b.length, 2);
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assert(b[0], "x");
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assert(b[1], "y");
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/* a function has no 'length' index properties, so an empty list */
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assert(Reflect.ownKeys(new Proxy({}, { ownKeys: () => function(){} })).length, 0);
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}
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{
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let called = 0;
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const p = new Proxy({}, { ownKeys() { called++; return 0; } });
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assertThrows(TypeError, function() { Reflect.ownKeys(p); });
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assert(called, 1);
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const q = new Proxy({}, { ownKeys() { throw new RangeError("boom"); } });
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assertThrows(RangeError, function() { Reflect.ownKeys(q); });
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}
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