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/*
This source file is part of the Swift.org open source project
Copyright (c) 2020 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 TSCTestSupport
import TSCUtility
class JSONMessageStreamingParserTests: XCTestCase {
func testParse() throws {
let delegate = MockParserDelegate()
let parser = JSONMessageStreamingParser(delegate: delegate)
parser.parse(bytes: "7".utf8)
delegate.assert(messages: [], rawTexts: [], errorDescription: nil)
parser.parse(bytes: "".utf8)
delegate.assert(messages: [], rawTexts: [], errorDescription: nil)
parser.parse(bytes: """
3
{
"id": 123456,
"type": "error",
""".utf8)
delegate.assert(messages: [], rawTexts: [], errorDescription: nil)
parser.parse(bytes: "".utf8)
delegate.assert(messages: [], rawTexts: [], errorDescription: nil)
parser.parse(bytes: """
"message": "This is outrageous!"
}
78
""".utf8)
delegate.assert(
messages: [MockParserDelegate.Message(id: 123456, type: "error", message: "This is outrageous!")],
rawTexts: [],
errorDescription: nil
)
parser.parse(bytes: """
{
"id": 456798,
"type": "warning",
"message": "You should be careful."
}
""".utf8)
delegate.assert(
messages: [MockParserDelegate.Message(id: 456798, type: "warning", message: "You should be careful.")],
rawTexts: [],
errorDescription: nil
)
parser.parse(bytes: """
76
{
"id": 789123,
"type": "note",
"message": "Note to self: buy milk."
}
64
{
"id": 456123,
"type": "note",
"message": "...and eggs"
}
63
""".utf8)
delegate.assert(
messages: [
MockParserDelegate.Message(id: 789123, type: "note", message: "Note to self: buy milk."),
MockParserDelegate.Message(id: 456123, type: "note", message: "...and eggs"),
],
rawTexts: [],
errorDescription: nil
)
parser.parse(bytes: """
{
"id": 753869,
"type": "error",
"message": "Pancakes!"
}
""".utf8)
delegate.assert(
messages: [
MockParserDelegate.Message(id: 753869, type: "error", message: "Pancakes!"),
],
rawTexts: [],
errorDescription: nil
)
}
func testInvalidMessageSizeBytes() {
let delegate = MockParserDelegate()
let parser = JSONMessageStreamingParser(delegate: delegate)
parser.parse(bytes: [65, 66, 200, 67, UInt8(ascii: "\n")])
delegate.assert(messages: [], rawTexts: [], errorDescription: "invalid UTF8 bytes")
parser.parse(bytes: """
76
{
"id": 789123,
"type": "note",
"message": "Note to self: buy milk."
}
""".utf8)
delegate.assert(messages: [], rawTexts: [], errorDescription: nil)
}
func testInvalidMessageSizeValue() {
let delegate = MockParserDelegate()
let parser = JSONMessageStreamingParser(delegate: delegate)
parser.parse(bytes: """
2A
""".utf8)
delegate.assert(messages: [], rawTexts: ["2A"], errorDescription: nil)
parser.parse(bytes: """
76
{
"id": 789123,
"type": "note",
"message": "Note to self: buy milk."
}
""".utf8)
delegate.assert(
messages: [MockParserDelegate.Message(id: 789123, type: "note", message: "Note to self: buy milk.")],
rawTexts: [],
errorDescription: nil
)
}
func testInvalidMessageBytes() {
let delegate = MockParserDelegate()
let parser = JSONMessageStreamingParser(delegate: delegate)
parser.parse(bytes: """
4
""".utf8)
delegate.assert(messages: [], rawTexts: [], errorDescription: nil)
parser.parse(bytes: [65, 66, 200, 67, UInt8(ascii: "\n")])
delegate.assert(messages: [], rawTexts: [], errorDescription: .contains("unexpected JSON message"))
parser.parse(bytes: """
76
{
"id": 789123,
"type": "note",
"message": "Note to self: buy milk."
}
""".utf8)
delegate.assert(messages: [], rawTexts: [], errorDescription: nil)
}
func testInvalidMessageMissingField() {
let delegate = MockParserDelegate()
let parser = JSONMessageStreamingParser(delegate: delegate)
parser.parse(bytes: """
23
{
"invalid": "json"
}
""".utf8)
delegate.assert(messages: [], rawTexts: [], errorDescription: .contains("unexpected JSON message"))
parser.parse(bytes: """
76
{
"id": 789123,
"type": "note",
"message": "Note to self: buy milk."
}
""".utf8)
delegate.assert(messages: [], rawTexts: [], errorDescription: nil)
}
func testInvalidMessageInvalidValue() {
let delegate = MockParserDelegate()
let parser = JSONMessageStreamingParser(delegate: delegate)
parser.parse(bytes: """
5
{
"id": 789123,
"type": "note",
"message": "Note to self: buy milk."
}
""".utf8)
delegate.assert(messages: [], rawTexts: [], errorDescription: .contains("unexpected JSON message"))
parser.parse(bytes: """
76
{
"id": 789123,
"type": "note",
"message": "Note to self: buy milk."
}
""".utf8)
delegate.assert(messages: [], rawTexts: [], errorDescription: nil)
}
}
private final class MockParserDelegate: JSONMessageStreamingParserDelegate {
struct Message: Equatable, Decodable {
let id: Int
let type: String
let message: String
}
private var messages: [Message] = []
private var rawTexts: [String] = []
private var error: Error? = nil
func jsonMessageStreamingParser(
_ parser: JSONMessageStreamingParser<MockParserDelegate>,
didParse message: Message
) {
messages.append(message)
}
func jsonMessageStreamingParser(
_ parser: JSONMessageStreamingParser<MockParserDelegate>,
didParseRawText text: String
) {
rawTexts.append(text)
}
func jsonMessageStreamingParser(
_ parser: JSONMessageStreamingParser<MockParserDelegate>,
didFailWith error: Error
) {
self.error = error
}
func assert(
messages: [Message],
rawTexts: [String],
errorDescription: StringPattern?,
file: StaticString = #file,
line: UInt = #line
) {
XCTAssertEqual(messages, self.messages, file: file, line: line)
XCTAssertEqual(rawTexts, self.rawTexts, file: file, line: line)
let errorReason = (self.error as? LocalizedError)?.errorDescription ?? error?.localizedDescription
switch (errorReason, errorDescription) {
case (let errorReason?, let errorDescription?):
XCTAssertMatch(errorReason, errorDescription, file: file, line: line)
case (nil, nil):
break
case (let errorReason?, nil):
XCTFail("unexpected error: \(errorReason)")
case (nil, .some):
XCTFail("unexpected success")
}
self.messages.removeAll()
self.rawTexts.removeAll()
self.error = nil
}
}
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