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@mackoj
Created June 3, 2022 20:59
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This PropertyWrapper allow you to force a value when decoding a property
import Foundation
/// This allow to force a default value when using codable
/// This will force `isEditMode` to always have `false` when decoding it
/// @MockCodable(defaultValue: false) public var isEditMode: Bool = true
@propertyWrapper
public struct MockCodable<Value> {
private var value: Value
private var defaultValue: Value
public init(wrappedValue: Value, defaultValue: Value) {
self.value = wrappedValue
self.defaultValue = defaultValue
}
public var wrappedValue: Value {
get { value }
set { self.value = newValue }
}
}
extension MockCodable: Decodable where Value: Decodable {
public init(from decoder: Decoder) throws {
let container = try decoder.singleValueContainer()
let extracted = try container.decode(Value.self)
self.value = extracted
self.defaultValue = extracted
}
}
extension MockCodable: Encodable where Value: Encodable {
public func encode(to encoder: Encoder) throws {
var container = encoder.singleValueContainer()
try container.encode(self.defaultValue)
}
}
extension MockCodable: Equatable where Value: Equatable {
public static func == (lhs: MockCodable<Value>, rhs: MockCodable<Value>) -> Bool {
lhs.wrappedValue == rhs.wrappedValue
}
}
extension MockCodable: Hashable where Value: Hashable {
public func hash(into hasher: inout Hasher) {
hasher.combine(wrappedValue)
}
}
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