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| 1 | +import { describe, expect, it } from 'vitest'; |
| 2 | +import { testdata } from './fixtures/encodes'; |
| 3 | +import { encodeWithPrecision } from '../src/encode'; |
| 4 | +import { decode } from '../src/decode'; |
| 5 | +import { convertToAlphabet } from '../src/alphabet/alphabet'; |
| 6 | +import { distanceInMeters, maxErrorInMeters } from '../src/geo/distance'; |
| 7 | + |
| 8 | +interface EncodeCase { |
| 9 | + str: string; |
| 10 | + y: number; |
| 11 | + x: number; |
| 12 | + local: number; |
| 13 | + global: number; |
| 14 | +} |
| 15 | + |
| 16 | +function buildCases(): EncodeCase[] { |
| 17 | + const cases: EncodeCase[] = []; |
| 18 | + for (let i = 0; testdata[i] !== -1 && i < testdata.length; i += 5) { |
| 19 | + cases.push({ |
| 20 | + str: String(testdata[i]), |
| 21 | + y: Number(testdata[i + 1]), |
| 22 | + x: Number(testdata[i + 2]), |
| 23 | + local: Number(testdata[i + 3]), |
| 24 | + global: Number(testdata[i + 4]), |
| 25 | + }); |
| 26 | + } |
| 27 | + return cases; |
| 28 | +} |
| 29 | + |
| 30 | +const cases = buildCases(); |
| 31 | + |
| 32 | +describe('encode corpus', () => { |
| 33 | + it.each(cases)('encodes/decodes $str ($y, $x)', ({ str, y, x, local, global }) => { |
| 34 | + const trimmed = str.trim(); |
| 35 | + const sp = trimmed.indexOf(' '); |
| 36 | + const territory = sp > 0 ? trimmed.substring(0, sp) : 'AAA'; |
| 37 | + const lat = Math.max(-90, Math.min(90, y)); |
| 38 | + |
| 39 | + if (local || trimmed !== '') { |
| 40 | + const r = encodeWithPrecision(lat, x, 2, territory); |
| 41 | + if (local) { |
| 42 | + expect(r.length, `local solution count for ${trimmed}`).toBe(local); |
| 43 | + } |
| 44 | + if (trimmed !== '') { |
| 45 | + expect( |
| 46 | + r.some((m) => m.fullmapcode.indexOf(trimmed) === 0), |
| 47 | + `expected mapcode ${trimmed} to be produced`, |
| 48 | + ).toBe(true); |
| 49 | + } |
| 50 | + } |
| 51 | + |
| 52 | + const g = encodeWithPrecision(lat, x, 2); |
| 53 | + if (global) { |
| 54 | + expect(g.length, `global solution count for ${trimmed}`).toBe(global); |
| 55 | + } |
| 56 | + |
| 57 | + for (let precision = 0; precision <= 8; precision++) { |
| 58 | + const rs = encodeWithPrecision(lat, x, precision); |
| 59 | + for (const m of rs) { |
| 60 | + const full = m.fullmapcode; |
| 61 | + expect(convertToAlphabet(convertToAlphabet(full, 14), 0)).toBe(full); |
| 62 | + const p = decode(full); |
| 63 | + expect(p, `decode(${full}) should succeed`).not.toBe(false); |
| 64 | + if (p === false) continue; |
| 65 | + const dm = distanceInMeters(lat, x, p.y, p.x); |
| 66 | + expect( |
| 67 | + dm, |
| 68 | + `decode(${full}) is ${(dm * 100).toFixed(2)}cm from origin`, |
| 69 | + ).toBeLessThanOrEqual(maxErrorInMeters(precision)); |
| 70 | + } |
| 71 | + } |
| 72 | + }); |
| 73 | +}); |
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