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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 https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
/// A type that has different `CustomStringConvertible` and
/// `CustomDebugStringConvertible` representations.
///
/// This type also conforms to other protocols, to make it
/// usable in constrained contexts. It is not intended to be a
/// minimal type that only conforms to certain protocols.
///
/// This type can be used to check that code uses the correct
/// kind of string representation.
public struct CustomPrintableValue
: Equatable, Comparable, Hashable, Strideable
{
public static var timesDescriptionWasCalled = ResettableValue(0)
public static var timesDebugDescriptionWasCalled = ResettableValue(0)
public static var descriptionImpl =
ResettableValue<(_ value: Int, _ identity: Int) -> String>({
(value: Int, identity: Int) -> String in
if identity == 0 {
return "(value: \(value)).description"
} else {
return "(value: \(value), identity: \(identity)).description"
}
})
public static var debugDescriptionImpl =
ResettableValue<(_ value: Int, _ identity: Int) -> String>({
(value: Int, identity: Int) -> String in
CustomPrintableValue.timesDescriptionWasCalled.value += 1
if identity == 0 {
return "(value: \(value)).debugDescription"
} else {
return "(value: \(value), identity: \(identity)).debugDescription"
}
})
public var value: Int
public var identity: Int
public init(_ value: Int) {
self.value = value
self.identity = 0
}
public init(_ value: Int, identity: Int) {
self.value = value
self.identity = identity
}
public var hashValue: Int {
return value.hashValue
}
public func hash(into hasher: inout Hasher) {
hasher.combine(value)
}
public typealias Stride = Int
public func distance(to other: CustomPrintableValue) -> Stride {
return other.value - self.value
}
public func advanced(by n: Stride) -> CustomPrintableValue {
return CustomPrintableValue(self.value + n, identity: self.identity)
}
}
public func == (
lhs: CustomPrintableValue,
rhs: CustomPrintableValue
) -> Bool {
return lhs.value == rhs.value
}
public func < (
lhs: CustomPrintableValue,
rhs: CustomPrintableValue
) -> Bool {
return lhs.value < rhs.value
}
extension CustomPrintableValue : CustomStringConvertible {
public var description: String {
CustomPrintableValue.timesDescriptionWasCalled.value += 1
return CustomPrintableValue.descriptionImpl.value(
value, identity)
}
}
extension CustomPrintableValue : CustomDebugStringConvertible {
public var debugDescription: String {
CustomPrintableValue.timesDebugDescriptionWasCalled.value += 1
return CustomPrintableValue.debugDescriptionImpl.value(
value, identity)
}
}
public func expectPrinted<T>(
expectedOneOf patterns: [String], _ object: T,
_ message: @autoclosure () -> String = "",
stackTrace: SourceLocStack = SourceLocStack(),
showFrame: Bool = true,
file: String = #file, line: UInt = #line
) {
let actual = String(describing: object)
if !patterns.contains(actual) {
expectationFailure(
"expected: any of \(String(reflecting: patterns))\n"
+ "actual: \(String(reflecting: actual))",
trace: message(),
stackTrace: stackTrace.pushIf(showFrame, file: file, line: line))
}
}
public func expectPrinted<T>(
_ expected: String, _ object: T,
_ message: @autoclosure () -> String = "",
stackTrace: SourceLocStack = SourceLocStack(),
showFrame: Bool = true,
file: String = #file, line: UInt = #line
) {
expectPrinted(expectedOneOf: [expected], object, message(),
stackTrace: stackTrace.pushIf(showFrame, file: file, line: line))
}
public func expectDebugPrinted<T>(
expectedOneOf patterns: [String], _ object: T,
_ message: @autoclosure () -> String = "",
stackTrace: SourceLocStack = SourceLocStack(),
showFrame: Bool = true,
file: String = #file, line: UInt = #line
) {
expectPrinted(expectedOneOf: patterns, String(reflecting: object), message(),
stackTrace: stackTrace.pushIf(showFrame, file: file, line: line))
}
public func expectDebugPrinted<T>(
_ expected: String, _ object: T,
_ message: @autoclosure () -> String = "",
stackTrace: SourceLocStack = SourceLocStack(),
showFrame: Bool = true,
file: String = #file, line: UInt = #line
) {
expectDebugPrinted(expectedOneOf: [expected], object, message(),
stackTrace: stackTrace.pushIf(showFrame, file: file, line: line))
}
public func expectDumped<T>(
_ expected: String, _ object: T,
_ message: @autoclosure () -> String = "",
stackTrace: SourceLocStack = SourceLocStack(),
showFrame: Bool = true,
file: String = #file, line: UInt = #line
) {
var actual = ""
dump(object, to: &actual)
expectEqual(expected, actual, message(),
stackTrace: stackTrace.pushIf(showFrame, file: file, line: line))
}
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