32 lines
1.4 KiB
TypeScript
32 lines
1.4 KiB
TypeScript
import assert from 'node:assert/strict'
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import { dirname, join } from 'node:path'
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import { fileURLToPath } from 'node:url'
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import { readFileSync, readdirSync } from 'node:fs'
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import test from 'node:test'
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const sourceRoot = dirname(fileURLToPath(import.meta.url))
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const union = /export type ConvertErrorCode =\n((?:\s+\| '[a-z-]+'\n)+)/
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const declared = /'([a-z-]+)'/g
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const callSite = /(?:failure\(|code: )'([a-z-]+)'/g
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function declaredCodes(): string[] {
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const source = readFileSync(join(sourceRoot, 'result.ts'), 'utf8')
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const members = union.exec(source)?.[1]
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assert.notEqual(members, undefined, 'result.ts declares no ConvertErrorCode union')
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return [...(members ?? '').matchAll(declared)].map(([, name]) => name ?? '').sort()
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}
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function calledCodes(): string[] {
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const called = new Set<string>()
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for (const name of readdirSync(sourceRoot, { encoding: 'utf8', recursive: true })) {
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if (!name.endsWith('.ts') || name.endsWith('.test.ts') || name === 'result.ts') continue
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for (const [, code] of readFileSync(join(sourceRoot, name), 'utf8').matchAll(callSite)) called.add(code ?? '')
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}
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return [...called].sort()
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}
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// Removing a code is breaking (docs/decisions.md §The code list), so a code must not outlive its cause.
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test('every ConvertErrorCode is the code of a production call site, and every call site names a declared one', () => {
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assert.deepEqual(calledCodes(), declaredCodes())
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})
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