mirror of
https://github.com/dart-lang/sdk
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49 lines
1.5 KiB
Dart
49 lines
1.5 KiB
Dart
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// Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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const sampleText = "Sample text file.";
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main() async {
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const uriText = "package:package_test_data/resources/sample.txt";
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const resource = const Resource(uriText);
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if (resource.uri != Uri.parse(uriText)) {
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throw "Incorrect URI: ${resource.uri}";
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}
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var text = await resource.readAsString();
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if (!text.startsWith("Sample text file.")) {
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throw "Incorrect reading of text file: $text";
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}
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var bytes = await resource.readAsBytes();
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if (!compareBytes(bytes, sampleText.codeUnits)) {
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throw "Incorrect reading of bytes: $bytes";
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}
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var streamBytes = [];
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await for (var byteSlice in resource.openRead()) {
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streamBytes.addAll(byteSlice);
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}
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if (!compareBytes(streamBytes, sampleText.codeUnits)) {
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throw "Incorrect reading of bytes: $bytes";
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}
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if (!compareBytes(streamBytes, bytes)) {
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throw "Inconsistent reading of bytes: $bytes / $streamBytes";
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}
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}
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/// Checks that [bytes] starts with [expectedBytes].
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///
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/// The bytes may be longer (because the test file is a text file and its
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/// terminating line ending may be mangled on some platforms).
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bool compareBytes(bytes, expectedBytes) {
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if (bytes.length < expectedBytes.length) return false;
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for (int i = 0; i < expectedBytes.length; i++) {
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if (bytes[i] != expectedBytes[i]) return false;
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}
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return true;
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}
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