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19 lines
1022 B
JavaScript
19 lines
1022 B
JavaScript
const { isDeepStrictEqual: equal } = require("node:util");
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const util = require("util");
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const compare = util.isDeepStrictEqual;
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console.log("missing", equal(), equal(undefined), equal(1), compare());
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console.log("alias", equal === compare, compare({ a: [1] }, { a: [1] }));
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const a = Object.create(null);
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a.value = { inner: 1 };
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const b = { value: { inner: 1 } };
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console.log("prototype", equal(a, b), equal(a, b, false), equal(a, b, true));
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console.log("truthiness", equal(a, b, 0), equal(a, b, "yes"), equal(a, b, { skipPrototype: false }));
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console.log("recursive", equal({ a }, { a: b }), equal({ a }, { a: b }, true));
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const trace = [];
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function argument(label, value) { trace.push(label); return value; }
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console.log("arguments", equal(argument("a", 1), argument("b", 1), argument("option", false), argument("extra", 2)), trace.join(","));
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const first = { value: 1 };
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const second = { value: 2 };
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function update() { first.value = 2; return 0; }
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console.log("late mutation", equal(first, second, false, update()));
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