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/*
This source file is part of the Swift.org open source project
Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
Licensed under Apache License v2.0 with Runtime Library Exception
See http://swift.org/LICENSE.txt for license information
See http://swift.org/CONTRIBUTORS.txt for Swift project authors
*/
import XCTest
import TSCBasic
class WritableByteStreamTests: XCTestCase {
func testBasics() {
var stream = BufferedOutputByteStream()
"Hel".write(to: stream)
"Hello".dropFirst(3).write(to: stream)
Character(",").write(to: stream)
Character(" ").write(to: stream)
[UInt8]("wor".utf8).write(to: stream)
[UInt8]("world".utf8)[3..<5].write(to: stream)
let streamable: TextOutputStreamable = Character("!")
streamable.write(to: &stream)
XCTAssertEqual(stream.position, "Hello, world!".utf8.count)
stream.flush()
XCTAssertEqual(stream.bytes, "Hello, world!")
}
func testStreamOperator() {
let stream = BufferedOutputByteStream()
stream
.send("Hello")
.send(Character(","))
.send(Character(" "))
.send([UInt8]("wor".utf8))
.send([UInt8]("world".utf8)[3..<5])
XCTAssertEqual(stream.position, "Hello, world".utf8.count)
XCTAssertEqual(stream.bytes, "Hello, world")
}
func testBufferCorrectness() {
let smallBlock = [UInt8](repeating: 2, count: 1 << 14)
// Check small / big interleavings for various block sizes (to prove buffer transfer optimizations).
for blockSize in [1 << 10, 1 << 12, 1 << 13, 1 << 14] {
let bigBlock = [UInt8](repeating: 1, count: blockSize)
var stream = BufferedOutputByteStream()
stream.send(smallBlock).send(bigBlock)
XCTAssertEqual(stream.bytes, ByteString(smallBlock + bigBlock))
stream = BufferedOutputByteStream()
stream.send(bigBlock).send(smallBlock)
XCTAssertEqual(stream.bytes, ByteString(bigBlock + smallBlock))
stream = BufferedOutputByteStream()
stream.send(bigBlock).send(bigBlock)
XCTAssertEqual(stream.bytes, ByteString(bigBlock + bigBlock))
}
}
func testJSONEncoding() {
// Test string encoding.
func asJSON(_ value: String) -> ByteString {
let stream = BufferedOutputByteStream()
stream.writeJSONEscaped(value)
return stream.bytes
}
XCTAssertEqual(asJSON("a'\"\\"), "a'\\\"\\\\")
XCTAssertEqual(asJSON("\u{0008}"), "\\b")
XCTAssertEqual(asJSON("\u{000C}"), "\\f")
XCTAssertEqual(asJSON("\n"), "\\n")
XCTAssertEqual(asJSON("\r"), "\\r")
XCTAssertEqual(asJSON("\t"), "\\t")
XCTAssertEqual(asJSON("\u{0001}"), "\\u0001")
// Test other random types.
var stream = BufferedOutputByteStream()
stream.send(Format.asJSON(false))
XCTAssertEqual(stream.bytes, "false")
stream = BufferedOutputByteStream()
stream .send(Format.asJSON(1 as Int))
XCTAssertEqual(stream.bytes, "1")
stream = BufferedOutputByteStream()
stream.send(Format.asJSON(1.2 as Double))
XCTAssertEqual(stream.bytes, "1.2")
}
func testFormattedOutput() {
do {
let stream = BufferedOutputByteStream()
stream.send(Format.asJSON("\n"))
XCTAssertEqual(stream.bytes, "\"\\n\"")
}
do {
let stream = BufferedOutputByteStream()
stream.send(Format.asJSON(["hello", "world\n"]))
XCTAssertEqual(stream.bytes, "[\"hello\",\"world\\n\"]")
}
do {
let stream = BufferedOutputByteStream()
stream.send(Format.asJSON(["hello": "world\n"]))
XCTAssertEqual(stream.bytes, "{\"hello\":\"world\\n\"}")
}
do {
struct MyThing {
let value: String
init(_ value: String) { self.value = value }
}
let stream = BufferedOutputByteStream()
stream.send(Format.asJSON([MyThing("hello"), MyThing("world\n")], transform: { $0.value }))
XCTAssertEqual(stream.bytes, "[\"hello\",\"world\\n\"]")
}
do {
let stream = BufferedOutputByteStream()
stream.send(Format.asSeparatedList(["hello", "world"], separator: ", "))
XCTAssertEqual(stream.bytes, "hello, world")
}
do {
struct MyThing {
let value: String
init(_ value: String) { self.value = value }
}
let stream = BufferedOutputByteStream()
stream.send(Format.asSeparatedList([MyThing("hello"), MyThing("world")], transform: { $0.value }, separator: ", "))
XCTAssertEqual(stream.bytes, "hello, world")
}
do {
var stream = BufferedOutputByteStream()
stream.send(Format.asRepeating(string: "foo", count: 1))
XCTAssertEqual(stream.bytes, "foo")
stream = BufferedOutputByteStream()
stream.send(Format.asRepeating(string: "foo", count: 0))
XCTAssertEqual(stream.bytes, "")
stream = BufferedOutputByteStream()
stream.send(Format.asRepeating(string: "x", count: 4))
XCTAssertEqual(stream.bytes, "xxxx")
stream = BufferedOutputByteStream()
stream.send(Format.asRepeating(string: "foo", count: 3))
XCTAssertEqual(stream.bytes, "foofoofoo")
}
}
func testLocalFileStream() throws {
try withTemporaryFile { tempFile in
func read() -> String? {
return try! localFileSystem.readFileContents(tempFile.path).validDescription
}
let stream = try LocalFileOutputByteStream(tempFile.path)
stream.send("Hello")
stream.flush()
XCTAssertEqual(read(), "Hello")
stream.send(" World")
try stream.close()
XCTAssertEqual(read(), "Hello World")
}
}
func testLocalFileStreamArraySliceUnbuffered() throws {
try withTemporaryFile { tempFile in
let bytes1k = [UInt8](repeating: 0, count: 1 << 10)
func read() -> ByteString? {
return try! localFileSystem.readFileContents(tempFile.path)
}
let stream = try LocalFileOutputByteStream(tempFile.path, buffered: false)
stream.write(bytes1k)
stream.flush()
XCTAssertEqual(read()!.contents, bytes1k)
try stream.close()
}
}
func testThreadSafeStream() {
var threads = [Thread]()
let stream = BufferedOutputByteStream()
let threadSafeStream = ThreadSafeOutputByteStream(stream)
let t1 = Thread {
for _ in 0..<1000 {
threadSafeStream.send("Hello")
}
}
threads.append(t1)
let t2 = Thread {
for _ in 0..<1000 {
threadSafeStream.write("Hello")
}
}
threads.append(t2)
threads.forEach { $0.start() }
threads.forEach { $0.join() }
XCTAssertEqual(stream.bytes.count, 5 * 2000)
}
}
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