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https://github.com/apple/sourcekit-lsp.git
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05ecd26d08
We will be able to split the LSP modules off later. These LSP modules will provide the ability to write custom LSP servers and clients in Swift. The sourcekit-lsp repository will build on top of this new package to provide an LSP implementation that creates a language server for Swift and C-based-languages.
99 lines
3.9 KiB
Swift
99 lines
3.9 KiB
Swift
//===----------------------------------------------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2018 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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import Foundation
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import XCTest
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/// Checks the encoding of the given value against the given json string and verifies that decoding the json reproduces the original value (according to its equatable conformance).
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///
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/// - parameter value: The value to encode/decode.
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/// - parameter json: The expected json encoding.
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public func checkCoding<T>(_ value: T, json: String, file: StaticString = #file, line: UInt = #line) where T: Codable & Equatable {
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let encoder = JSONEncoder()
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encoder.outputFormatting.insert(.prettyPrinted)
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if #available(macOS 10.13, *) {
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encoder.outputFormatting.insert(.sortedKeys)
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}
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let data = try! encoder.encode(WrapFragment(value: value))
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let wrappedStr = String(data: data, encoding: .utf8)!
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/// Strip off WrapFragment encoding `{"value":}` and extra indentation.
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let pre = "{\n \"value\" : "
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let suff = "\n}"
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XCTAssert(wrappedStr.hasPrefix(pre))
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XCTAssert(wrappedStr.hasSuffix(suff))
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let str = String(wrappedStr.dropFirst(pre.count).dropLast(suff.count))
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// Remove extra indentation
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.replacingOccurrences(of: "\n ", with: "\n")
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// Remove trailing whitespace to normalize between corelibs and Apple Foundation.
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.trimmingTrailingWhitespace()
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// Requires sortedKeys. Silently drop the check if it's not available.
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if #available(macOS 10.13, *) {
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XCTAssertEqual(json, str, file: file, line: line)
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}
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let decoder = JSONDecoder()
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let decodedValue = try! decoder.decode(WrapFragment<T>.self, from: data).value
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XCTAssertEqual(value, decodedValue, file: file, line: line)
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}
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/// JSONEncoder requires the top-level value to be encoded as a JSON container (array or object). Give it one.
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private struct WrapFragment<T>: Equatable, Codable where T: Equatable & Codable {
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var value: T
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}
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/// Checks that decoding the given string is equal to the expected value.
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///
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/// - parameter value: The value to encode/decode.
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/// - parameter json: The expected json encoding.
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public func checkDecoding<T>(json: String, expected value: T, file: StaticString = #file, line: UInt = #line) where T: Codable & Equatable {
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let wrappedStr = "{\"value\":\(json)}"
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let data = wrappedStr.data(using: .utf8)!
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let decoder = JSONDecoder()
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let decodedValue = try! decoder.decode(WrapFragment<T>.self, from: data).value
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XCTAssertEqual(value, decodedValue, file: file, line: line)
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}
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public func checkCoding<T>(_ value: T, json: String, userInfo: [CodingUserInfoKey: Any] = [:], file: StaticString = #file, line: UInt = #line, body: (T) -> Void) where T: Codable {
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let encoder = JSONEncoder()
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encoder.outputFormatting.insert(.prettyPrinted)
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if #available(macOS 10.13, *) {
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encoder.outputFormatting.insert(.sortedKeys)
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}
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let data = try! encoder.encode(value)
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let str = String(data: data, encoding: .utf8)!
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// Remove trailing whitespace to normalize between corelibs and Apple Foundation.
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.trimmingTrailingWhitespace()
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// Requires sortedKeys. Silently drop the check if it's not available.
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if #available(macOS 10.13, *) {
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XCTAssertEqual(json, str, file: file, line: line)
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}
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let decoder = JSONDecoder()
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decoder.userInfo = userInfo
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let decodedValue = try! decoder.decode(T.self, from: data)
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body(decodedValue)
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}
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extension String {
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// This is fileprivate because the implementation is really slow; to use it outside a test it should be optimized.
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fileprivate func trimmingTrailingWhitespace() -> String {
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return self.replacingOccurrences(of: "[ ]+\\n", with: "\n", options: .regularExpression)
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}
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}
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