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39 lines
1.0 KiB
39 lines
1.0 KiB
export const tests = [] |
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const t = (f) => tests.push(f) |
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const cantEdit = (fn) => { |
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try { |
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fn() |
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} catch (err) { |
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return true |
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} |
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} |
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t(() => nested.constructor === Object) |
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// nested is constant and can not be re-assigned |
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t(({ fail }) => nested && fail(() => (nested = 10))) |
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t(() => nested.obj.constructor === Object) |
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t(() => typeof nested.obj.str === 'string') |
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t(() => typeof nested.obj.num === 'number') |
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t(() => typeof nested.obj.bool === 'boolean') |
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t(() => Array.isArray(nested.arr)) |
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t(() => nested.arr[0] === 4) |
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t(() => nested.arr[1] === undefined) |
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t(() => nested.arr[2] === '2') |
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t(() => nested.arr.length === 3) |
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// nested is frozen and can not be changed |
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t(() => cantEdit(() => (nested.obj = 5))) |
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t(() => nested.obj !== 5) |
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// nested.obj is also frozen and can not be changed |
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t(() => cantEdit(() => (nested.obj.update = 5))) |
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t(() => nested.obj.update === undefined) |
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// nested.arr is not frozen and can be changed |
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t(() => cantEdit(() => nested.arr.push('hot stuff'))) |
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t(() => nested.arr.length === 3) |
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Object.freeze(tests)
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