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53 lines
1.5 KiB
53 lines
1.5 KiB
var test = require('tape') |
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var crypto = require('../') |
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var Buffer = require('safe-buffer').Buffer |
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test('get error message', function (t) { |
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try { |
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var b = crypto.randomFillSync(Buffer.alloc(10)) |
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t.ok(Buffer.isBuffer(b)) |
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t.end() |
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} catch (err) { |
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t.ok(/not supported/.test(err.message), '"not supported" is in error message') |
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t.end() |
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} |
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}) |
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test('randomfill', function (t) { |
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t.plan(5) |
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t.equal(crypto.randomFillSync(Buffer.alloc(10)).length, 10) |
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t.ok(Buffer.isBuffer(crypto.randomFillSync(Buffer.alloc(10)))) |
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crypto.randomFill(Buffer.alloc(10), function (ex, bytes) { |
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t.error(ex) |
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t.equal(bytes.length, 10) |
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t.ok(Buffer.isBuffer(bytes)) |
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t.end() |
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}) |
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}) |
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test('seems random', function (t) { |
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var L = 1000 |
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var b = crypto.randomFillSync(Buffer.alloc(L)) |
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var mean = [].reduce.call(b, function (a, b) { |
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return a + b |
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}, 0) / L |
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// test that the random numbers are plausably random. |
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// Math.random() will pass this, but this will catch |
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// terrible mistakes such as this blunder: |
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// https://github.com/dominictarr/crypto-browserify/commit/3267955e1df7edd1680e52aeede9a89506ed2464#commitcomment-7916835 |
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// this doesn't check that the bytes are in a random *order* |
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// but it's better than nothing. |
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var expected = 256 / 2 |
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var smean = Math.sqrt(mean) |
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// console.log doesn't work right on testling, *grumble grumble* |
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console.log(JSON.stringify([expected - smean, mean, expected + smean])) |
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t.ok(mean < expected + smean) |
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t.ok(mean > expected - smean) |
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t.end() |
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})
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