78 lines
2.0 KiB
TypeScript
78 lines
2.0 KiB
TypeScript
import { expect, test } from 'vitest';
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import { decodeFloat, encodeFloat } from './encoding';
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test('encode_float', () => {
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const input = 1.23;
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const encoded = encodeFloat(input);
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const output = decodeFloat(encoded);
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console.log(input, output);
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expect(output).toBeCloseTo(input);
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});
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test('encode 2.0', () => {
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const input = 2.0;
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const encoded = encodeFloat(input);
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expect(encoded).toEqual(1073741824);
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});
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test('floating point imprecision', () => {
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let maxError = 0;
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new Array(10_000).fill(null).forEach((_, i) => {
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const input = i < 5_000 ? i : Math.random() * 100;
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const encoded = encodeFloat(input);
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const output = decodeFloat(encoded);
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const error = Math.abs(input - output);
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if (error > maxError) {
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maxError = error;
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}
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});
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expect(maxError).toBeLessThan(0.00001);
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});
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// Test with negative numbers
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test('negative numbers', () => {
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const inputs = [-1, -0.5, -123.456, -0.0001];
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inputs.forEach(input => {
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const encoded = encodeFloat(input);
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const output = decodeFloat(encoded);
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expect(output).toBeCloseTo(input);
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});
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});
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// Test with very small numbers
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test('very small numbers', () => {
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const input = 1.2345e-38;
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const encoded = encodeFloat(input);
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const output = decodeFloat(encoded);
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expect(output).toBeCloseTo(input);
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});
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// Test with zero
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test('zero', () => {
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const input = 0;
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const encoded = encodeFloat(input);
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const output = decodeFloat(encoded);
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expect(output).toBe(0);
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});
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// Test with infinity
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test('infinity', () => {
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const input = Infinity;
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const encoded = encodeFloat(input);
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const output = decodeFloat(encoded);
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expect(output).toBe(Infinity);
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});
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// Test with large numbers
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test('large numbers', () => {
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const inputs = [1e+5, 1e+10];
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inputs.forEach(input => {
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const encoded = encodeFloat(input);
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const output = decodeFloat(encoded);
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// Note: Large numbers may lose precision, hence using toBeCloseTo with a tolerance
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expect(output).toBeCloseTo(input, 0);
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});
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});
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