dateKeys-dart/test/formats_differential_vm_test.dart

// The differential of the formats against the Go reference on the VM, with
// every case of test/vectors/formats_*.json and the fixtures of testdata/
// that the cases of the frame of a .dkc cut and edit. And the part of those
// files that formats_vectors.g.dart holds for the tests compiled to
// JavaScript, which must be every eighth case of each section.
@TestOn('vm')
library;

import 'dart:convert';
import 'dart:io';

import 'package:datekeys/src/version.dart';
import 'package:test/test.dart';

import 'formats_differential.dart';
import 'vectors/formats_vectors.g.dart';

const names = [
  'framing',
  'header',
  'control',
  'profile',
  'extension',
  'datekey',
  'time',
  'padding',
  'body',
  'encode',
];

void main() {
  final files = {
    for (final n in names)
      n: jsonDecode(
        File('test/vectors/formats_$n.json').readAsStringSync(),
      ) as Json,
  };

  test('every file is of this specification and of its generator', () {
    for (final f in files.values) {
      expect(f['spec'], specVersion);
      expect(f['generator'], 'tool/formats_go_vectors.go');
    }
  });

  formatsDifferential(
    files,
    testdata: (path) => File('testdata/$path').readAsBytesSync(),
  );

  group('formats_vectors.g.dart', () {
    const embedded = {
      'framing': formatsFramingJson,
      'header': formatsHeaderJson,
      'control': formatsControlJson,
      'profile': formatsProfileJson,
      'extension': formatsExtensionJson,
      'datekey': formatsDatekeyJson,
      'time': formatsTimeJson,
      'padding': formatsPaddingJson,
      'body': formatsBodyJson,
      'encode': formatsEncodeJson,
    };
    for (final MapEntry(key: name, value: text) in embedded.entries) {
      test('holds every eighth case of formats_$name.json', () {
        final part = jsonDecode(text) as Json;
        final file = files[name]!;
        expect(part.keys, file.keys);
        for (final key in file.keys) {
          final value = file[key];
          if (value is! List) {
            expect(part[key], value);
            continue;
          }
          expect(part[key], [
            for (var i = 0; i < value.length; i += 8) value[i],
          ], reason: key);
        }
      });
    }
  });
}