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util.test.ts
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util.test.ts
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import {
commandDecode,
commandEncode,
deltaDecodeArray,
deltaDecodeSortedArray,
deltaEncodeArray,
deltaEncodeSortedArray,
dequantizeBBox,
dequantizeBBox3D,
dequantizeLat,
dequantizeLon,
quantizeBBox,
quantizeLat,
quantizeLon,
unweave2D,
unweave3D,
unweaveAndDeltaDecode3DArray,
unweaveAndDeltaDecodeArray,
weave2D,
weave3D,
weaveAndDeltaEncode3DArray,
weaveAndDeltaEncodeArray,
zagzig,
zigzag,
} from '../src/util';
import { describe, expect, test } from 'bun:test';
describe('quantizeLonLat and dequantizeLonLat', () => {
test('quantizeLonLat', () => {
expect([quantizeLon(-179.6765432), quantizeLat(-89.235657434254)]).toEqual([15074, 71242]);
expect([quantizeLon(179.6765432), quantizeLat(89.235657434254)]).toEqual([16762141, 16705973]);
expect([quantizeLon(-180), quantizeLat(-90)]).toEqual([0, 0]);
expect([quantizeLon(180), quantizeLat(90)]).toEqual([16777215, 16777215]);
expect(Number(16777215).toString(2).length <= 24).toBe(true);
});
test('dequantizeLonLat', () => {
expect([dequantizeLon(15074), dequantizeLat(71242)]).toEqual([
-179.67654703119678, -89.23565621588565,
]);
expect([dequantizeLon(16762141), dequantizeLat(16705973)]).toEqual([
179.67654703119678, 89.23565621588565,
]);
expect([dequantizeLon(0), dequantizeLat(0)]).toEqual([-180, -90]);
expect([dequantizeLon(16777215), dequantizeLat(16777215)]).toEqual([180, 90]);
});
});
describe('quantizeBBox and dequantizeBBox', () => {
test('quantizeBBox', () => {
expect(quantizeBBox([-179.6765432, -89.235657434254, 179.6765432, 89.235657434254])).toEqual(
new Uint8Array([0, 58, 226, 1, 22, 74, 255, 197, 29, 254, 233, 181]),
);
expect(quantizeBBox([-180, -90, 180, 90])).toEqual(
new Uint8Array([0, 0, 0, 0, 0, 0, 255, 255, 255, 255, 255, 255]),
);
});
test('dequantizeBBox', () => {
expect(
dequantizeBBox(new Uint8Array([0, 58, 226, 1, 22, 74, 255, 197, 29, 254, 233, 181])),
).toEqual([-179.67654703119678, -89.23565621588565, 179.67654703119678, 89.23565621588565]);
expect(
dequantizeBBox(new Uint8Array([0, 0, 0, 0, 0, 0, 255, 255, 255, 255, 255, 255])),
).toEqual([-180, -90, 180, 90]);
});
test('quantizeBBox3D and dequantizeBBox3D', () => {
expect(
quantizeBBox([-179.6765432, -89.235657434254, 179.6765432, 89.235657434254, -100.2, 2004.21]),
).toEqual(
new Uint8Array([
0, 58, 226, 1, 22, 74, 255, 197, 29, 254, 233, 181, 102, 102, 200, 194, 184, 134, 250, 68,
]),
);
expect(
dequantizeBBox3D(
new Uint8Array([
0, 58, 226, 1, 22, 74, 255, 197, 29, 254, 233, 181, 102, 102, 200, 194, 184, 134, 250, 68,
]),
),
).toEqual([
-179.67654703119678, -89.23565621588565, 179.67654703119678, 89.23565621588565,
-100.19999694824219, 2004.2099609375,
]);
});
});
describe('commandEncode and commandDecode', () => {
test('commandEncode', () => {
expect(commandEncode(0, 0)).toBe(0);
expect(commandEncode(1, 1)).toBe(9);
});
test('commandDecode', () => {
expect(commandDecode(0)).toEqual({ cmd: 0, len: 0 });
expect(commandDecode(9)).toEqual({ cmd: 1, len: 1 });
});
test('both functions', () => {
expect(commandDecode(commandEncode(0, 0))).toEqual({ cmd: 0, len: 0 });
expect(commandDecode(commandEncode(1, 1))).toEqual({ cmd: 1, len: 1 });
});
});
describe('zigzag and zagzig', () => {
test('zigzag', () => {
expect(zigzag(0)).toBe(0);
expect(zigzag(1)).toBe(2);
expect(zigzag(2)).toBe(4);
expect(zigzag(3)).toBe(6);
expect(zigzag(-1)).toBe(1);
expect(zigzag(-2)).toBe(3);
expect(zigzag(-3)).toBe(5);
});
test('zagzig', () => {
expect(zagzig(0)).toBe(0);
expect(zagzig(1)).toBe(-1);
expect(zagzig(2)).toBe(1);
expect(zagzig(3)).toBe(-2);
expect(zagzig(4)).toBe(2);
expect(zagzig(5)).toBe(-3);
expect(zagzig(6)).toBe(3);
});
test('both functions', () => {
expect(zagzig(zigzag(0))).toBe(0);
expect(zagzig(zigzag(1))).toBe(1);
expect(zagzig(zigzag(2))).toBe(2);
expect(zagzig(zigzag(3))).toBe(3);
expect(zagzig(zigzag(-1))).toBe(-1);
expect(zagzig(zigzag(-2))).toBe(-2);
expect(zagzig(zigzag(-3))).toBe(-3);
});
});
describe('weave2D and unweave2D', () => {
test('weave2D', () => {
expect(weave2D(0, 0)).toBe(0);
expect(weave2D(1, 0)).toBe(1);
expect(weave2D(0, 1)).toBe(2);
expect(weave2D(1, 1)).toBe(3);
expect(weave2D(3, 5)).toBe(39);
});
test('unweave2D', () => {
expect(unweave2D(0)).toEqual({ a: 0, b: 0 });
expect(unweave2D(1)).toEqual({ a: 1, b: 0 });
expect(unweave2D(2)).toEqual({ a: 0, b: 1 });
expect(unweave2D(3)).toEqual({ a: 1, b: 1 });
});
test('both functions', () => {
expect(unweave2D(weave2D(0, 0))).toEqual({ a: 0, b: 0 });
expect(unweave2D(weave2D(1, 0))).toEqual({ a: 1, b: 0 });
expect(unweave2D(weave2D(0, 1))).toEqual({ a: 0, b: 1 });
expect(unweave2D(weave2D(1, 1))).toEqual({ a: 1, b: 1 });
expect(unweave2D(weave2D(42_913, 32_382))).toEqual({
a: 42_913,
b: 32_382,
});
expect(unweave2D(weave2D(65_535, 65_535))).toEqual({
a: 65_535,
b: 65_535,
});
});
});
describe('weave3D and unweave3D', () => {
test('weave3D', () => {
expect(weave3D(0, 0, 0)).toBe(0);
expect(weave3D(1, 0, 0)).toBe(1);
expect(weave3D(0, 1, 0)).toBe(2);
expect(weave3D(1, 1, 0)).toBe(3);
expect(weave3D(0, 0, 1)).toBe(4);
expect(weave3D(1, 0, 1)).toBe(5);
expect(weave3D(0, 1, 1)).toBe(6);
expect(weave3D(1, 1, 1)).toBe(7);
expect(weave3D(3, 5, 6)).toBe(427);
});
test('unweave3D', () => {
expect(unweave3D(0)).toEqual({ a: 0, b: 0, c: 0 });
expect(unweave3D(1)).toEqual({ a: 1, b: 0, c: 0 });
expect(unweave3D(2)).toEqual({ a: 0, b: 1, c: 0 });
expect(unweave3D(3)).toEqual({ a: 1, b: 1, c: 0 });
expect(unweave3D(4)).toEqual({ a: 0, b: 0, c: 1 });
expect(unweave3D(5)).toEqual({ a: 1, b: 0, c: 1 });
expect(unweave3D(6)).toEqual({ a: 0, b: 1, c: 1 });
expect(unweave3D(7)).toEqual({ a: 1, b: 1, c: 1 });
});
test('both functions', () => {
expect(unweave3D(weave3D(0, 0, 0))).toEqual({ a: 0, b: 0, c: 0 });
expect(unweave3D(weave3D(1, 0, 0))).toEqual({ a: 1, b: 0, c: 0 });
expect(unweave3D(weave3D(0, 1, 0))).toEqual({ a: 0, b: 1, c: 0 });
expect(unweave3D(weave3D(1, 1, 0))).toEqual({ a: 1, b: 1, c: 0 });
expect(unweave3D(weave3D(0, 0, 1))).toEqual({ a: 0, b: 0, c: 1 });
expect(unweave3D(weave3D(1, 0, 1))).toEqual({ a: 1, b: 0, c: 1 });
expect(unweave3D(weave3D(0, 1, 1))).toEqual({ a: 0, b: 1, c: 1 });
expect(unweave3D(weave3D(1, 1, 1))).toEqual({ a: 1, b: 1, c: 1 });
expect(unweave3D(weave3D(42_913, 32_382, 12_382))).toEqual({
a: 42_913,
b: 32_382,
c: 12_382,
});
expect(unweave3D(weave3D(65_535, 65_535, 65_535))).toEqual({
a: 65_535,
b: 65_535,
c: 65_535,
});
});
});
describe('weaveAndDeltaEncodeArray and unweaveAndDeltaDecodeArray', () => {
test('weaveAndDeltaEncodeArray', () => {
expect(
weaveAndDeltaEncodeArray([
{ x: 55, y: 22 },
{ x: 11, y: 33 },
{ x: 22, y: 44 },
{ x: 23, y: 42 },
]),
).toEqual([7412, 4925, 828, 14]);
});
test('unweaveAndDeltaDecodeArray', () => {
expect(unweaveAndDeltaDecodeArray([7412, 4925, 828, 14])).toEqual([
{ x: 55, y: 22 },
{ x: 11, y: 33 },
{ x: 22, y: 44 },
{ x: 23, y: 42 },
]);
});
});
describe('weaveAndDeltaEncode3DArray and unweaveAndDeltaDecode3DArray', () => {
test('weaveAndDeltaEncode3DArray', () => {
expect(
weaveAndDeltaEncode3DArray([
{ x: 55, y: 22, z: 1 },
{ x: 11, y: 33, z: 2 },
{ x: 22, y: 44, z: 3 },
{ x: 23, y: 42, z: 4 },
]),
).toEqual([362216, 274681, 12536, 58]);
});
test('unweaveAndDeltaDecode3DArray', () => {
expect(unweaveAndDeltaDecode3DArray([362216, 274681, 12536, 58])).toEqual([
{ x: 55, y: 22, z: 1 },
{ x: 11, y: 33, z: 2 },
{ x: 22, y: 44, z: 3 },
{ x: 23, y: 42, z: 4 },
]);
});
});
describe('deltaEncodeArray and deltaDecodeArray', () => {
test('deltaEncodeArray', () => {
expect(deltaEncodeArray([55, 22, 11, 33, 22, 44, 23, 42])).toEqual([
110, 65, 21, 44, 21, 44, 41, 38,
]);
});
test('deltaDecodeArray', () => {
expect(deltaDecodeArray([110, 65, 21, 44, 21, 44, 41, 38])).toEqual([
55, 22, 11, 33, 22, 44, 23, 42,
]);
});
});
describe('deltaEncodeSortedArray and deltaDecodeSortedArray', () => {
const sortedArray = [55, 22, 11, 33, 22, 44, 23, 42].sort((a, b) => a - b);
test('deltaEncodeSortedArray', () => {
expect(deltaEncodeSortedArray(sortedArray)).toEqual([11, 11, 0, 1, 10, 9, 2, 11]);
});
test('deltaDecodeSortedArray', () => {
expect(deltaDecodeSortedArray([11, 11, 0, 1, 10, 9, 2, 11])).toEqual([
11, 22, 22, 23, 33, 42, 44, 55,
]);
});
});