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binary-data

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Declarative binary data encoder / decoder.

github.com/reklatsmasters/binary-data

reklatsmasters/binary-data

1 lines • 13.5 kB
1
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strict';\n\nconst buffer = require('types/buffer');\n// const BinaryStream = require('lib/binary-stream');\n\ndescribe('buffer', () => {\n describe('argument `length` is number', () => {\n test('encode', () => {\n const writeBuffer = jest.fn();\n const wstream = {\n writeBuffer,\n };\n\n const length = 2;\n const buf = Buffer.allocUnsafe(length);\n\n const type = buffer(length);\n\n type.encode(buf, wstream);\n\n expect(writeBuffer).toHaveBeenCalledTimes(1);\n expect(writeBuffer).toBeCalledWith(buf);\n expect(type.encode.bytes).toBe(length);\n });\n\n test('should not encode large buffer', () => {\n const length = 2;\n\n const wstream = {};\n\n const buf = Buffer.allocUnsafe(length + 1);\n const type = buffer(length);\n\n expect(() => type.encode(buf, wstream)).toThrow(\n `Buffer required length ${length} instead of ${buf.length}`\n );\n });\n\n test('decode', () => {\n const length = 2;\n const buf = Buffer.allocUnsafe(length);\n\n const readBuffer = jest.fn().mockImplementation(() => buf);\n const rstream = {\n readBuffer,\n };\n\n const type = buffer(length);\n\n expect(type.decode(rstream)).toBe(buf);\n expect(readBuffer).toHaveBeenCalledTimes(1);\n expect(readBuffer).toBeCalledWith(length);\n expect(type.decode.bytes).toBe(length);\n });\n\n test('encodingLength', () => {\n const length = 2;\n\n const type = buffer(length);\n expect(type.encodingLength(Buffer.alloc(0))).toBe(length);\n });\n });\n\n describe('argument `length` is type', () => {\n test('encode', () => {\n const writeBuffer = jest.fn();\n const wstream = {\n writeBuffer,\n };\n\n const length = 2;\n const lengthBytes = 3;\n const buf = Buffer.allocUnsafe(length);\n\n const lengthType = {\n decode() {},\n encode: jest.fn().mockImplementation(() => {\n lengthType.encode.bytes = lengthBytes;\n }),\n };\n\n const type = buffer(lengthType);\n type.encode(buf, wstream);\n\n expect(lengthType.encode).toHaveBeenCalledTimes(1);\n expect(lengthType.encode).toBeCalledWith(length, wstream);\n expect(writeBuffer).toHaveBeenCalledTimes(1);\n expect(writeBuffer).toBeCalledWith(buf);\n expect(type.encode.bytes).toBe(length + lengthBytes);\n });\n\n test('decode', () => {\n const length = 2;\n const buf = Buffer.allocUnsafe(length);\n\n const readBuffer = jest.fn().mockImplementation(() => buf);\n const lengthBytes = 5;\n\n const rstream = {\n readBuffer,\n };\n\n const lengthType = {\n decode: () => length,\n encode() {},\n };\n\n lengthType.decode.bytes = lengthBytes;\n\n const type = buffer(lengthType);\n\n expect(type.decode(rstream)).toBe(buf);\n expect(readBuffer).toHaveBeenCalledTimes(1);\n expect(readBuffer).toBeCalledWith(length);\n expect(type.decode.bytes).toBe(buf.length + lengthBytes);\n });\n\n test('encodingLength', () => {\n const length = 5;\n const typeLength = 2;\n const buf = Buffer.allocUnsafe(length);\n\n const lengthType = {\n encode() {},\n decode() {},\n encodingLength() {\n return typeLength;\n },\n };\n\n const type = buffer(lengthType);\n\n expect(type.encodingLength(buf)).toBe(typeLength + length);\n });\n });\n\n describe('argument `length` is function', () => {\n test('decode', () => {\n const length = 2;\n const buf = Buffer.allocUnsafe(length);\n\n const readBuffer = jest.fn().mockImplementation(() => buf);\n\n const rstream = {\n readBuffer,\n };\n\n const callback = jest.fn().mockImplementation(() => length);\n const type = buffer(callback);\n\n expect(type.decode(rstream)).toBe(buf);\n expect(readBuffer).toHaveBeenCalledTimes(1);\n expect(readBuffer).toBeCalledWith(length);\n expect(callback).toHaveBeenCalledTimes(1);\n expect(type.decode.bytes).toBe(length);\n });\n\n test('encode', () => {\n const writeBuffer = jest.fn();\n\n const wstream = {\n writeBuffer,\n };\n\n const length = 2;\n const buf = Buffer.allocUnsafe(length);\n\n const callback = jest.fn().mockImplementation(() => length);\n const type = buffer(callback);\n\n type.encode(buf, wstream);\n\n expect(writeBuffer).toHaveBeenCalledTimes(1);\n expect(writeBuffer).toBeCalledWith(buf);\n expect(callback).toHaveBeenCalledTimes(1);\n expect(type.encode.bytes).toBe(length);\n });\n\n test('encodingLength', () => {\n const length = 5;\n\n const type = buffer(() => length * 2);\n expect(type.encodingLength(Buffer.alloc(length))).toBe(length);\n });\n });\n\n describe('argument `length` is null', () => {\n test('decode', () => {\n const buf = Buffer.from([1, 2, 3, 4, 5, 0, 5, 6, 7, 8]);\n const length = buf.indexOf(0);\n const expected = buf.slice(0, length);\n\n const rstream = {\n readBuffer: jest.fn().mockImplementation(size => buf.slice(0, size)),\n indexOf: jest.fn().mockImplementation(byte => buf.indexOf(byte)),\n consume: jest.fn(),\n };\n\n const type = buffer(null);\n\n expect(type.decode(rstream)).toEqual(expected);\n expect(type.decode.bytes).toEqual(length + 1);\n });\n\n test('encode', () => {\n const buf = Buffer.from([1, 2, 3, 4, 5]);\n const writeBuffer = jest.fn();\n const writeUInt8 = jest.fn();\n const wstream = {\n writeBuffer,\n writeUInt8,\n };\n\n const type = buffer(null);\n\n type.encode(buf, wstream);\n\n expect(writeBuffer).toHaveBeenCalledTimes(1);\n expect(writeBuffer).toBeCalledWith(buf);\n expect(writeUInt8).toHaveBeenCalledTimes(1);\n expect(writeUInt8).toBeCalledWith(0);\n expect(type.encode.bytes).toBe(buf.length + 1);\n });\n\n test('encodingLength', () => {\n const buf = Buffer.from([1, 2, 3, 4, 5]);\n const type = buffer(null);\n\n expect(type.encodingLength(buf)).toBe(buf.length + 1);\n });\n });\n\n // test('should be able to encode BinaryStream', () => {\n // const buf = new BinaryStream();\n // const writeBuffer = jest.fn();\n // const writeUInt8 = jest.fn();\n // const wstream = {\n // writeBuffer,\n // writeUInt8,\n // };\n\n // const type = buffer(null);\n\n // type.encode(buf, wstream);\n\n // expect(writeBuffer).toHaveBeenCalledTimes(1);\n // expect(writeBuffer).toBeCalledWith(buf);\n // expect(writeUInt8).toHaveBeenCalledTimes(1);\n // expect(writeUInt8).toBeCalledWith(0);\n // expect(type.encode.bytes).toBe(buf.length + 1);\n // });\n});\n"]}