39 lines
1.3 KiB
Dart
39 lines
1.3 KiB
Dart
import 'dart:typed_data';
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import 'package:flutter_test/flutter_test.dart';
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import 'package:hvbt_dash/core/protocol/neg8.dart';
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void main() {
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group('NEG8 checksum', () {
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test('S300 request header [0x1B, 0x00] produces 0xE5', () {
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// NEG8 of [0x1B, 0x00] = (0 - 0x1B - 0x00) & 0xFF = 0xE5
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final buf = Uint8List.fromList([0x1B, 0x00]);
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expect(calculateNeg8(buf), equals(0xE5));
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});
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test('KPro request header [0x1B, 0x01] produces 0xE4', () {
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final buf = Uint8List.fromList([0x1B, 0x01]);
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expect(calculateNeg8(buf), equals(0xE4));
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});
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test('validateFrame passes for correctly checksummed frame', () {
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// Build a 4-byte frame where last byte = NEG8 of first 3
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final data = Uint8List.fromList([0x1B, 0x00, 0x00, 0xE5]);
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expect(validateFrame(data), isTrue);
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});
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test('validateFrame fails for corrupted frame', () {
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final data = Uint8List.fromList([0x1B, 0x00, 0x00, 0xFF]);
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expect(validateFrame(data), isFalse);
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});
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test('validateFrame returns false for empty frame', () {
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expect(validateFrame(Uint8List(0)), isFalse);
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});
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test('single byte 0x00 validates as [0x00, 0x00]', () {
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// NEG8([0x00]) = 0x00, so frame [0x00, 0x00] should pass
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expect(validateFrame(Uint8List.fromList([0x00, 0x00])), isTrue);
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});
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});
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}
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