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28 lines
890 B
28 lines
890 B
'use strict';
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require('../common');
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const assert = require('assert');
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const symbol = Symbol('sym');
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const errRegExp = /^TypeError: Cannot convert a Symbol value to a string$/;
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// Verify that getting via a symbol key returns undefined.
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assert.strictEqual(process.env[symbol], undefined);
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// Verify that assigning via a symbol key throws.
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assert.throws(() => {
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process.env[symbol] = 42;
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}, errRegExp);
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// Verify that assigning a symbol value throws.
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assert.throws(() => {
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process.env.foo = symbol;
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}, errRegExp);
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// Verify that using a symbol with the in operator returns false.
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assert.strictEqual(symbol in process.env, false);
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// Verify that deleting a symbol key returns true.
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assert.strictEqual(delete process.env[symbol], true);
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// Checks that well-known symbols like `Symbol.toStringTag` won’t throw.
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assert.doesNotThrow(() => Object.prototype.toString.call(process.env));
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