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100 lines
4.2 KiB
JavaScript
100 lines
4.2 KiB
JavaScript
/* global assert, JSBI, pow */
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const { calcTarget, incrementNonce, bufferToBase64, bigIntToUint8Array, greaterThan } = pow;
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describe('Proof of Work', () => {
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describe('#incrementNonce', () => {
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it('should increment a Uint8Array nonce correctly', () => {
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const arr1Before = new Uint8Array([0, 0, 0, 0, 0, 0, 0, 0]);
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const arr1After = incrementNonce(arr1Before);
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assert.strictEqual(arr1After[0], 0);
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assert.strictEqual(arr1After[1], 0);
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assert.strictEqual(arr1After[2], 0);
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assert.strictEqual(arr1After[3], 0);
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assert.strictEqual(arr1After[4], 0);
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assert.strictEqual(arr1After[5], 0);
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assert.strictEqual(arr1After[6], 0);
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assert.strictEqual(arr1After[7], 1);
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});
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it('should increment a Uint8Array nonce correctly in a loop', () => {
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let arr = new Uint8Array([0, 0, 0, 0, 0, 0, 0, 0]);
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assert.deepEqual(incrementNonce(arr), new Uint8Array([0, 0, 0, 0, 0, 0, 0, 1]));
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arr = new Uint8Array([0, 0, 0, 0, 0, 0, 0, 0]);
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for (let i = 0; i <= 255; i += 1) {
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arr = incrementNonce(arr);
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}
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assert.deepEqual(arr, new Uint8Array([0, 0, 0, 0, 0, 0, 1, 0]));
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arr = new Uint8Array([255, 255, 255, 255, 255, 255, 255, 255]);
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assert.deepEqual(incrementNonce(arr), new Uint8Array([0, 0, 0, 0, 0, 0, 0, 0]));
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});
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});
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describe('#calcTarget', () => {
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it('should calculate a correct difficulty target', () => {
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// These values will need to be updated if we adjust the difficulty settings
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let payloadLen = 625;
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const ttl = 86400000;
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let expectedTarget = new Uint8Array([0, 4, 119, 164, 35, 224, 222, 64]);
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let actualTarget = calcTarget(ttl, payloadLen, 10);
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assert.deepEqual(actualTarget, expectedTarget);
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payloadLen = 6597;
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expectedTarget = new Uint8Array([0, 0, 109, 145, 174, 146, 124, 3]);
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actualTarget = calcTarget(ttl, payloadLen, 10);
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assert.deepEqual(actualTarget, expectedTarget);
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});
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});
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describe('#greaterThan', () => {
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it('should correclty compare two Uint8Arrays', () => {
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let arr1 = new Uint8Array([0, 0, 0, 0, 0, 0, 0, 0, 0, 1]);
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let arr2 = new Uint8Array([0, 0, 0, 0, 0, 0, 0, 0, 0, 1]);
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assert.isFalse(greaterThan(arr1, arr2));
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arr1 = new Uint8Array([0, 0, 0, 0, 0, 0, 0, 0, 0, 2]);
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arr2 = new Uint8Array([0, 0, 0, 0, 0, 0, 0, 0, 0, 1]);
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assert.isTrue(greaterThan(arr1, arr2));
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arr1 = new Uint8Array([255, 255, 255, 255, 255, 255, 255, 255, 255, 255]);
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arr2 = new Uint8Array([255, 255, 255, 255, 255, 255, 255, 255, 255, 254]);
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assert.isTrue(greaterThan(arr1, arr2));
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arr1 = new Uint8Array([254, 255, 255, 255, 255, 255, 255, 255, 255, 255]);
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arr2 = new Uint8Array([255, 255, 255, 255, 255, 255, 255, 255, 255, 255]);
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assert.isFalse(greaterThan(arr1, arr2));
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arr1 = new Uint8Array([0]);
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arr2 = new Uint8Array([0, 0]);
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assert.isFalse(greaterThan(arr1, arr2));
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});
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});
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describe('#bufferToBase64', () => {
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it('should correclty convert a Uint8Array to a base64 string', () => {
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let arr = new Uint8Array([1, 2, 3]);
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let expected = 'AQID';
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assert.strictEqual(bufferToBase64(arr), expected);
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arr = new Uint8Array([123, 25, 3, 121, 45, 87, 24, 111]);
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expected = 'exkDeS1XGG8=';
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assert.strictEqual(bufferToBase64(arr), expected);
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arr = new Uint8Array([]);
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expected = '';
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assert.strictEqual(bufferToBase64(arr), expected);
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});
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});
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describe('#bigIntToUint8Array', () => {
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it('should correclty convert a BigInteger to a Uint8Array', () => {
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let bigInt = JSBI.BigInt(Number.MAX_SAFE_INTEGER);
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let expected = new Uint8Array([0, 31, 255, 255, 255, 255, 255, 255]);
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assert.deepEqual(bigIntToUint8Array(bigInt), expected);
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bigInt = JSBI.BigInt('0');
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expected = new Uint8Array([0, 0, 0, 0, 0, 0, 0, 0]);
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assert.deepEqual(bigIntToUint8Array(bigInt), expected);
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bigInt = JSBI.BigInt('255');
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expected = new Uint8Array([0, 0, 0, 0, 0, 0, 0, 255]);
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assert.deepEqual(bigIntToUint8Array(bigInt), expected);
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bigInt = JSBI.BigInt('256');
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expected = new Uint8Array([0, 0, 0, 0, 0, 0, 1, 0]);
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assert.deepEqual(bigIntToUint8Array(bigInt), expected);
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});
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});
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});
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