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13 lines
348 B
JavaScript
13 lines
348 B
JavaScript
test("normal mode", () => {
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expect(() => {
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NaN = 5; // NaN is a non-writable global variable
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}).not.toThrow();
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});
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test("strict mode", () => {
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expect(() => {
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"use strict";
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NaN = 5; // NaN is a non-writable global variable
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}).toThrowWithMessage(TypeError, "Cannot write to non-writable property 'NaN'");
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});
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