Emitter 2a: the corpus runner, the canonical serializer and the CommonMark subset

src/canonical-json.test.ts

@@ -0,0 +1,41 @@
+import assert from 'node:assert/strict'
+import test from 'node:test'
+
+import { serializeCanonicalJson } from './canonical-json.ts'
+
+test('sorts object keys recursively', () => {
+  const value = { b: 1, a: { d: 2, c: 3 } }
+  assert.equal(serializeCanonicalJson(value, 'compact'), '{"a":{"c":3,"d":2},"b":1}')
+})
+
+test('spells two-space indentation the way the corpus holds it', () => {
+  const value = { content: [{ text: 'x', type: 'text' }], type: 'doc', version: 1 }
+  assert.equal(
+    serializeCanonicalJson(value, 'two-space'),
+    [
+      '{',
+      '  "content": [',
+      '    {',
+      '      "text": "x",',
+      '      "type": "text"',
+      '    }',
+      '  ],',
+      '  "type": "doc",',
+      '  "version": 1',
+      '}',
+    ].join('\n'),
+  )
+})
+
+test('keeps empty objects and arrays on one line in both spellings', () => {
+  assert.equal(serializeCanonicalJson({ a: {}, b: [] }, 'two-space'), '{\n  "a": {},\n  "b": []\n}')
+  assert.equal(serializeCanonicalJson({ a: {}, b: [] }, 'compact'), '{"a":{},"b":[]}')
+})
+
+test('leaves non-ASCII raw', () => {
+  assert.equal(serializeCanonicalJson({ text: '🎉 räksmörgås' }, 'compact'), '{"text":"🎉 räksmörgås"}')
+})
+
+test('spells scalars in canonical JSON', () => {
+  assert.equal(serializeCanonicalJson([null, true, false, 0, -1.5, 'a"b'], 'compact'), '[null,true,false,0,-1.5,"a\\"b"]')
+})