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// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'package:flutter/foundation.dart';
import 'package:flutter_test/flutter_test.dart';
void main() {
group('Write and read buffer round-trip', () {
test('of empty buffer', () {
final WriteBuffer write = WriteBuffer();
final ByteData written = write.done();
expect(written.lengthInBytes, 0);
});
test('of single byte', () {
final WriteBuffer write = WriteBuffer();
write.putUint8(201);
final ByteData written = write.done();
expect(written.lengthInBytes, equals(1));
final ReadBuffer read = ReadBuffer(written);
expect(read.getUint8(), equals(201));
});
test('of 32-bit integer', () {
final WriteBuffer write = WriteBuffer();
write.putInt32(-9);
final ByteData written = write.done();
expect(written.lengthInBytes, equals(4));
final ReadBuffer read = ReadBuffer(written);
expect(read.getInt32(), equals(-9));
});
test('of 32-bit integer in big endian', () {
final WriteBuffer write = WriteBuffer();
write.putInt32(-9, endian: Endian.big);
final ByteData written = write.done();
expect(written.lengthInBytes, equals(4));
final ReadBuffer read = ReadBuffer(written);
expect(read.getInt32(endian: Endian.big), equals(-9));
});
test('of 64-bit integer', () {
final WriteBuffer write = WriteBuffer();
write.putInt64(-9000000000000);
final ByteData written = write.done();
expect(written.lengthInBytes, equals(8));
final ReadBuffer read = ReadBuffer(written);
expect(read.getInt64(), equals(-9000000000000));
}, skip: kIsWeb); // [intended] bigint isn't supported on web.
test('of 64-bit integer in big endian', () {
final WriteBuffer write = WriteBuffer();
write.putInt64(-9000000000000, endian: Endian.big);
final ByteData written = write.done();
expect(written.lengthInBytes, equals(8));
final ReadBuffer read = ReadBuffer(written);
expect(read.getInt64(endian: Endian.big), equals(-9000000000000));
}, skip: kIsWeb); // [intended] bigint isn't supported on web.
test('of double', () {
final WriteBuffer write = WriteBuffer();
write.putFloat64(3.14);
final ByteData written = write.done();
expect(written.lengthInBytes, equals(8));
final ReadBuffer read = ReadBuffer(written);
expect(read.getFloat64(), equals(3.14));
});
test('of double in big endian', () {
final WriteBuffer write = WriteBuffer();
write.putFloat64(3.14, endian: Endian.big);
final ByteData written = write.done();
expect(written.lengthInBytes, equals(8));
final ReadBuffer read = ReadBuffer(written);
expect(read.getFloat64(endian: Endian.big), equals(3.14));
});
test('of 32-bit int list when unaligned', () {
final Int32List integers = Int32List.fromList(<int>[-99, 2, 99]);
final WriteBuffer write = WriteBuffer();
write.putUint8(9);
write.putInt32List(integers);
final ByteData written = write.done();
expect(written.lengthInBytes, equals(16));
final ReadBuffer read = ReadBuffer(written);
read.getUint8();
expect(read.getInt32List(3), equals(integers));
});
test('of 64-bit int list when unaligned', () {
final Int64List integers = Int64List.fromList(<int>[-99, 2, 99]);
final WriteBuffer write = WriteBuffer();
write.putUint8(9);
write.putInt64List(integers);
final ByteData written = write.done();
expect(written.lengthInBytes, equals(32));
final ReadBuffer read = ReadBuffer(written);
read.getUint8();
expect(read.getInt64List(3), equals(integers));
}, skip: kIsWeb); // [intended] bigint isn't supported on web.
test('of float list when unaligned', () {
final Float32List floats = Float32List.fromList(<double>[3.14, double.nan]);
final WriteBuffer write = WriteBuffer();
write.putUint8(9);
write.putFloat32List(floats);
final ByteData written = write.done();
expect(written.lengthInBytes, equals(12));
final ReadBuffer read = ReadBuffer(written);
read.getUint8();
final Float32List readFloats = read.getFloat32List(2);
expect(readFloats[0], closeTo(3.14, 0.0001));
expect(readFloats[1], isNaN);
});
test('of double list when unaligned', () {
final Float64List doubles = Float64List.fromList(<double>[3.14, double.nan]);
final WriteBuffer write = WriteBuffer();
write.putUint8(9);
write.putFloat64List(doubles);
final ByteData written = write.done();
expect(written.lengthInBytes, equals(24));
final ReadBuffer read = ReadBuffer(written);
read.getUint8();
final Float64List readDoubles = read.getFloat64List(2);
expect(readDoubles[0], equals(3.14));
expect(readDoubles[1], isNaN);
});
test('done twice', () {
final WriteBuffer write = WriteBuffer();
write.done();
expect(() => write.done(), throwsStateError);
});
test('empty WriteBuffer', () {
expect(() => WriteBuffer(startCapacity: 0), throwsAssertionError);
});
test('size 1', () {
expect(() => WriteBuffer(startCapacity: 1), returnsNormally);
});
});
}