72 lines
3.2 KiB
JavaScript
72 lines
3.2 KiB
JavaScript
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import {describe, expect, it} from "vitest";
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import MSP from "../../src/js/msp";
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describe("MSP", () => {
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describe("encode_message_v1", () => {
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it("handles correctly any code and no data", () => {
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for (let code = 0; code < 256; code++) {
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let encodedMessage = MSP.encode_message_v1(code, false);
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expect(new Uint8Array(encodedMessage)).toEqual(new Uint8Array([36, 77, 60, 0, code, code]));
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}
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});
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it("handles non-empty messages correctly", () => {
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let [operationCode, inputDataLengthPadding] = crypto.getRandomValues(new Uint8Array(2));
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let inputData = crypto.getRandomValues(new Uint8Array(100 + inputDataLengthPadding % 100));
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let encodedMessage = new Uint8Array(MSP.encode_message_v1(operationCode, inputData));
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// check that header is in place
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expect(encodedMessage.slice(0, 3)).toEqual(new Uint8Array([36, 77, 60]));
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// check that length got encoded as expected
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expect(encodedMessage[3]).toEqual(inputData.length);
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// check that operation code is there
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expect(encodedMessage[4]).toEqual(operationCode);
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// check that data got encoded as expected
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expect(encodedMessage.slice(5, -1)).toEqual(inputData);
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// and that the checksum is valid
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let checksum = encodedMessage.slice(3, -1).reduce((acc, curr) => acc ^ curr);
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expect(encodedMessage[encodedMessage.length - 1]).toEqual(checksum);
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});
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});
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describe("encode_message_v2", () => {
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it("handles correctly any code and no data", () => {
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for (let codeLowByte = 0; codeLowByte < 256; codeLowByte++) {
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for (let codeHighByte = 0; codeHighByte < 256; codeHighByte++) {
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let encodedMessage = MSP.encode_message_v2(codeLowByte + codeHighByte * 256, false).slice(0, -1);
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expect(new Uint8Array(encodedMessage)).toEqual(new Uint8Array([36, 88, 60, 0, codeLowByte, codeHighByte, 0, 0]));
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}
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}
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});
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it("handles non-empty messages correctly", () => {
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let [lengthLowByte, lengthHighByte] = crypto.getRandomValues(new Uint8Array(2));
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let inputData = crypto.getRandomValues(new Uint8Array(lengthLowByte + lengthHighByte * 256));
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let [operationCodeLowByte, operationCodeHighByte] = crypto.getRandomValues(new Uint8Array(2));
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let encodedMessage = new Uint8Array(MSP.encode_message_v2(operationCodeLowByte + 256 * operationCodeHighByte, inputData));
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// check that header is in place
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expect(encodedMessage.slice(0, 3)).toEqual(new Uint8Array([36, 88, 60]));
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expect(encodedMessage[3]).toEqual(0);
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// check that operation code is there
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expect(encodedMessage[4]).toEqual(operationCodeLowByte);
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expect(encodedMessage[5]).toEqual(operationCodeHighByte);
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// check that length got encoded as expected
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expect(encodedMessage[6]).toEqual(lengthLowByte);
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expect(encodedMessage[7]).toEqual(lengthHighByte);
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// check that data got encoded as expected
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expect(encodedMessage.slice(8, -1)).toEqual(inputData);
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});
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});
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});
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