mirror of
https://github.com/asadbek064/hyparquet-writer.git
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222 lines
8.0 KiB
JavaScript
222 lines
8.0 KiB
JavaScript
import { describe, expect, it } from 'vitest'
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import { unconvert, unconvertDecimal, unconvertMinMax } from '../src/unconvert.js'
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import { convertMetadata } from 'hyparquet/src/metadata.js'
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/**
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* @import {SchemaElement} from 'hyparquet'
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*/
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describe('unconvert', () => {
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it('should return Date objects when converted_type = DATE', () => {
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/** @type {SchemaElement} */
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const schema = { name: 'test', converted_type: 'DATE' }
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const input = [new Date('2020-01-01T00:00:00Z'), new Date('2021-01-01T00:00:00Z')]
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const result = unconvert(schema, input)
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expect(result).toEqual([18262, 18628])
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})
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it('should convert JSON objects to strings when converted_type = JSON', () => {
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/** @type {SchemaElement} */
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const schema = { name: 'test', converted_type: 'JSON' }
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const input = [{ foo: 'bar' }, { hello: 'world' }]
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const result = unconvert(schema, input)
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// We check that result is an array of Uint8Arrays containing the JSON-encoded bytes
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expect(result).toHaveLength(2)
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expect(result[0]).toBeInstanceOf(Uint8Array)
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expect(new TextDecoder().decode(result[0])).toEqual(JSON.stringify({ foo: 'bar' }))
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expect(new TextDecoder().decode(result[1])).toEqual(JSON.stringify({ hello: 'world' }))
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})
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it('should convert string array to Uint8Array when converted_type = UTF8', () => {
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/** @type {SchemaElement} */
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const schema = { name: 'test', converted_type: 'UTF8' }
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const input = ['hello', 'world']
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const result = unconvert(schema, input)
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expect(result).toHaveLength(2)
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expect(result[0]).toBeInstanceOf(Uint8Array)
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expect(new TextDecoder().decode(result[0])).toBe('hello')
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expect(new TextDecoder().decode(result[1])).toBe('world')
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})
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it('should throw an error when converted_type = UTF8 and values is not an array', () => {
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expect(() => unconvert(
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{ name: 'test', converted_type: 'UTF8' },
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new Uint8Array([1, 2, 3]))
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).toThrow('strings must be an array')
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})
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it('should throw an error when converted_type = JSON and values is not an array', () => {
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expect(() => unconvert(
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{ name: 'test', converted_type: 'JSON' },
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new Uint8Array([1, 2, 3]))
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).toThrow('JSON must be an array')
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})
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it('should return original values if there is no recognized converted_type', () => {
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const input = [1, 2, 3]
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const result = unconvert({ name: 'test' }, input)
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expect(result).toEqual(input)
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})
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})
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describe('unconvertMinMax', () => {
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it('should return undefined if value is undefined or null', () => {
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/** @type {SchemaElement} */
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const schema = { name: 'test', type: 'INT32' }
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expect(unconvertMinMax(undefined, schema)).toBeUndefined()
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})
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it('should handle BOOLEAN type', () => {
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/** @type {SchemaElement} */
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const schema = { name: 'test', type: 'BOOLEAN' }
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expect(unconvertMinMax(true, schema)).toEqual(new Uint8Array([1]))
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expect(unconvertMinMax(false, schema)).toEqual(new Uint8Array([0]))
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})
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it('should truncate BYTE_ARRAY or FIXED_LEN_BYTE_ARRAY to 16 bytes', () => {
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// longer string to test truncation
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const longStr = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
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const longStrUint8 = new TextEncoder().encode(longStr)
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// value is a Uint8Array
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const result1 = unconvertMinMax(longStrUint8, { name: 'test', type: 'BYTE_ARRAY' })
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expect(result1).toBeInstanceOf(Uint8Array)
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expect(result1?.length).toBe(16)
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// value is a string
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const result2 = unconvertMinMax(longStr, { name: 'test', type: 'FIXED_LEN_BYTE_ARRAY' })
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expect(result2).toBeInstanceOf(Uint8Array)
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expect(result2?.length).toBe(16)
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})
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it('should correctly encode FLOAT values in little-endian', () => {
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/** @type {SchemaElement} */
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const schema = { name: 'test', type: 'FLOAT' }
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const value = 1.5
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const result = unconvertMinMax(value, schema)
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expect(result).toBeInstanceOf(Uint8Array)
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const roundtrip = convertMetadata(result, schema)
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expect(roundtrip).toEqual(1.5)
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})
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it('should correctly encode DOUBLE values in little-endian', () => {
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/** @type {SchemaElement} */
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const schema = { name: 'test', type: 'DOUBLE' }
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const value = 1.123456789
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const result = unconvertMinMax(value, schema)
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expect(result).toBeInstanceOf(Uint8Array)
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const roundtrip = convertMetadata(result, schema)
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expect(roundtrip).toEqual(1.123456789)
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})
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it('should correctly encode INT32 values in little-endian', () => {
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/** @type {SchemaElement} */
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const schema = { name: 'test', type: 'INT32' }
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const value = 123456
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const result = unconvertMinMax(value, schema)
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const roundtrip = convertMetadata(result, schema)
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expect(roundtrip).toEqual(123456)
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})
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it('should correctly encode INT64 values when given a bigint', () => {
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/** @type {SchemaElement} */
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const schema = { name: 'test', type: 'INT64' }
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const value = 1234567890123456789n
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const result = unconvertMinMax(value, schema)
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const roundtrip = convertMetadata(result, schema)
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expect(roundtrip).toEqual(1234567890123456789n)
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})
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it('should correctly encode a Date as TIMESTAMP_MILLIS for INT64', () => {
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/** @type {SchemaElement} */
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const schema = { name: 'test', type: 'INT64', converted_type: 'TIMESTAMP_MILLIS' }
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const date = new Date('2023-01-01T00:00:00Z')
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const result = unconvertMinMax(date, schema)
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const roundtrip = convertMetadata(result, schema)
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expect(roundtrip).toEqual(date)
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})
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it('should throw an error for unsupported types', () => {
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/** @type {SchemaElement} */
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const schema = { name: 'test', type: 'INT96' }
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expect(() => unconvertMinMax(123, schema))
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.toThrow('unsupported type for statistics: INT96 with value 123')
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})
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it('should throw an error for INT64 if value is a number instead of bigint or Date', () => {
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/** @type {SchemaElement} */
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const schema = { name: 'test', type: 'INT64' }
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expect(() => unconvertMinMax(123, schema))
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.toThrow('unsupported type for statistics: INT64 with value 123')
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})
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})
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describe('unconvertDecimal', () => {
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const examples = [
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{ input: 0n, expected: new Uint8Array([]) },
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{ input: 1n, expected: new Uint8Array([0x01]) },
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{ input: -1n, expected: new Uint8Array([0xff]) },
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{ input: 1234n, expected: new Uint8Array([0x04, 0xd2]) },
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{ input: -1234n, expected: new Uint8Array([0xfb, 0x2e]) },
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{ input: 1234567890123456789n, expected: new Uint8Array([0x11, 0x22, 0x10, 0xf4, 0x7d, 0xe9, 0x81, 0x15]) },
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{ input: -1234567890123456789n, expected: new Uint8Array([0xee, 0xdd, 0xef, 0x0b, 0x82, 0x16, 0x7e, 0xeb]) },
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]
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/** @type {SchemaElement} */
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const element = {
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name: 'col',
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type: 'BYTE_ARRAY',
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}
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it.for(examples)('should convert %p', ({ input, expected }) => {
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expect(parseDecimal(expected)).toEqual(input)
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})
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it.for(examples)('should unconvert %p', ({ input, expected }) => {
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expect(unconvertDecimal(element, input)).toEqual(expected)
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})
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it.for(examples)('should roundtrip %p', ({ input }) => {
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const byteArray = unconvertDecimal(element, input)
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if (!(byteArray instanceof Uint8Array)) throw new Error('expected Uint8Array')
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expect(parseDecimal(byteArray)).toEqual(input)
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})
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it.for(examples)('should reverse roundtrip %p', ({ expected }) => {
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expect(unconvertDecimal(element, parseDecimal(expected))).toEqual(expected)
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})
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it('convert to INT32', () => {
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expect(unconvertDecimal({ name: 'col', type: 'INT32' }, 1234n)).toEqual(1234)
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})
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it('convert to INT64', () => {
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expect(unconvertDecimal({ name: 'col', type: 'INT64' }, 1234n)).toEqual(1234n)
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})
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it('throws if fixed length is not specified', () => {
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expect(() => unconvertDecimal({ name: 'col', type: 'FIXED_LEN_BYTE_ARRAY' }, 1234n))
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.toThrow('fixed length byte array type_length is required')
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})
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})
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/**
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* BigInt parseDecimal
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* @param {Uint8Array} bytes
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* @returns {bigint}
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*/
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function parseDecimal(bytes) {
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let value = 0n
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for (const byte of bytes) {
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value = value * 256n + BigInt(byte)
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}
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// handle signed
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const bits = BigInt(bytes.length) * 8n
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if (bits && value >= 2n ** (bits - 1n)) {
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value -= 2n ** bits
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}
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return value
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}
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